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Topics - Tranquility Bass

#1
For those fake review websites and infuencers that keep promoting "audio-file" network switches please get your facts straight and stop spreading mistruths and propaganda just because it is profitable for you to do so. That is no excuse to do it.

Unlike these fake reviewers and as someone that has actually designed DAC and DSP hardware all I can say is that once those 'ones' and 'zeros' are re-assembled inside a buffer within a DAC or DSP, the electronics does not care where they came from. Whether it's an S/PDIF, Toslink, USB or ethernet connection via streamer and network switch etc it makes no difference to the DAC hardware how they got there as long as there are no errors in the data then each source will produce an identical result and this can be measured as well !

And there in lies the rub. These fake review websites rarely measure anything if at all. Instead they will come up with a whole lot of lame excuses as to why they should not measure anything which is contrary to the people who design the hardware and/or the silicon used in most modern electronic devices. None of their lame excuses stands up to any scrutiny which should be a red flag to anyone reading it. What these people are doing is sending the industry back to the dark-ages and promoting a whole new industry of snake-oil merchants, snake-oil products, scam artists and spivs.

The only caveat here is that different devices may use different levels of isolation with the possibility of passing noise into the connecting device. However this all should be clearly measurable but of course if you don't measure anything then how would you know ? Of course this aspect which is usually the focus of most of these fake reviews has no bearing on the end sound quality. And changes in someones subjective interpretation of sound-stage is certainly not a reliable performance metric !!






#2
Worth going just for that. See how this old timeless classic stacks up against the new !

https://www.whathifi.com/news/australian-hi-fi-show-sydney-2024-dates-venue-and-ticket-info

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QuoteLEVEL 1: FARM COVE ROOM

Halcro & Duntech & Döhmann

The best of Australian – maybe the best in the world!

This unmissable audio suite will host Duntech's flagship Sovereign loudspeakers – acknowledged by experts as the finest in the world, certainly the most accurate, a seven driver system with the drivers symmetrically arranged on a vertical axis and time aligned.

The power comes from Halcro's very latest reference amplification, a triumph of form and function, unique in its imagination of what an amplifier is and how to puh the boundaries of technology.

The third Aussie legend is analogue playback courtesy of a Döhmann Helix turntable, engineered to deliver unparalleled performance in analogue playback and is the result of many years of research, development, collaboration and listening by internationally acclaimed analogue designer Mark Döhmann and his team.

It's an Australian supersystem not to be missed!


#4
No doubt happens here in Australia too. No doubt about that at all !!

#5
Don't be fooled by the blurb on the DEQX website regarding group-delay correction or compensation of loudspeakers. It's a way oversimplification of reality and they have been pushing the same barrow for decades which is probably why they have never commercialized their own speaker systems using it, instead pushing the gimmicks onto other naive loudspeaker designers. Trying to fix up a loudspeaker on a single axis was never going to work. Loudspeakers are far more complex than this and radiate into free space in all directions and not just on one axis alone ! What would fix up a signal chain on an electrical connection simply won't work with a distributed device such as a loudspeaker. This is why no serious hi-end audio manufacturer would ever use a DEQX as well ! Yes, sure our own  UPP can do long-length high sample rate, ultra deep convolution and FIR filtering and do a much higher resolution correction than a DEQX could ever do but do you really want to go down this path ?  When it comes to loudspeakers there simply is no free lunch here and no easy fix and throwing lots of DSP at the problem can often make the problems a lot worse. It certainly is not a panacea for a bad speaker design to begin with !

Anyway don't take our word for it but we suggest you read these three important documents before outlaying your hard earned money on such a device or anything that is just a fancy inverse convolution filter ! These are documents written by other well established audio engineers and echo the same sentiment as us. This is what DEQX will never tell you and why they never sell loudspeaker systems themselves using their own DSP hardware and even if they did it was always going to be a band-aid solution to a complex problem !

https://www.grimmaudio.com/wordpress/wp-content/uploads/speakers.pdf

And the take-home message from this document is:-

QuoteDSP loudspeaker crossovers done right

From the above we've learned that:-

• Heavy-handed correction exacerbates acoustical problems
• Sharp, linear-phase filters cause pre-ringing
• Targeting an exact linear-phase sum can cause pre-echos.

In short, brute-force correction sounds grainy and smudgy. When you hear cymbals go "splash" instead of
"crash", it's naive DSP at work. So:-

• Do not shave off the hair, a nasty stubble will grow back.
• Do not correct beyond the very beginning of the impulse response.
• The gentler you correct, the wider the angle over which the correction still improves things.
• Target a minimum phase sum.

For the time being I would strongly recommend designing the correction manually. This rules out FIR as the
main workhorse. For each bump or dip one corrects, one should know exactly where it comes from, and make
sure that it isn't better corrected for acoustically. Unfortunately, designing DSP filters does not relieve one from having to know one's acoustics.

Also:-

https://linea-research.co.uk/wp-content/uploads/LR%20Download%20Assets/Tech%20Docs/CrossoverFilters%20White%20Paper%20-C.pdf

QuoteAlso shown in Figure 8 is the impulse responses for a complementary high-pass brick-wall FIR. If we construct a crossover filter bank with such a complementary pair of filters, the Gibbs ripples are also complementary (since we will expect the filters to sum to a flat response with linear phase, producing a perfect impulse). The summed result will thus be free of any Gibbs ripple, so what's the problem? The problem is off-axis. The complementary ripples will only cancel if the delay suffered by the signal from each driver is identical. Off-axis, where the path lengths differ, the ripples will not cancel, leading to the possibility that Gibbs ripple might become audible (just like a high-Q ringing filter).

Such summing errors will be more pronounced at higher crossover frequencies because the ripples are more closely spaced. Lower frequency
crossovers will have wider ripples which will more easily cancel in the presence of off-axis induced delays.

It is evident that steeper cut-off slopes give rise to Gibbs ripples of greater duration. It makes sense therefore to restrict the cut-off slope to be no more than is necessary for the application.

And from the Linkwitz Lab website pretty much the same cautionary tale ;)

https://www.linkwitzlab.com/frontiers.htm

QuoteI - Digital crossovers

Some people think that digital crossovers will replace analog ones, because digital filters can be designed with desirable characteristics that are impossible to realize with analog circuitry. In particular, lowpass and highpass filters with extremely steep slopes and linear phase shift are possible. Steep slopes reduce the overlap region between drivers. Linear phase shift eliminates waveform distortion and merely causes a delay of the signal.  Such characteristics can be obtained from the digital equivalent of tapped delay line filters, which have a finite impulse response (FIR) duration that depends upon the number of taps used. Digital FIR filters can have almost any desired frequency response, if the number of weighted taps is made sufficiently high. [1]

The linear phase shift comes at a price. The impulse response rings. The more so, the steeper the filter slopes. Both lowpass and highpass sections of the crossover ring, but when the outputs are combined, as for a crossover, then the two impulse responses add to a non-ringing, delayed pulse.

All would be fine, if we listened only in anechoic spaces or to speakers with coincident drivers. In reality we use speakers in rooms with reflections and reverberation and the the drivers are separated from each other due to their sizes. As a consequence the off-axis response of the speaker matters and contributes to what we hear. With the drivers non-coincident, the lowpass and highpass outputs are delayed different amounts at points off-axis, and the ringing is no longer canceled in the addition. In the best case the drivers might be coaxial, but this has another set of problems. Very steep crossovers can also cause a very abrupt change in the polar pattern of the speaker, when transitioning from a large diameter driver to a small one. Under reverberant conditions and/or listening off-axis this may have audible consequences.


#6
Cantata / Technical Information/Crossover Schematics
January 08, 2024, 10:54:53 AM
Please feel free to add any technical material you may have on these speakers.
#7
Millenium / Reviews
January 08, 2024, 10:36:04 AM
https://www.audioasylum.com/messages/speakers/48322/review-dunlavy-audio-labs-millennium-speakers-review-by-brian-a-at-audio-asylum

QuoteAfter many months of research I went with these speakers for the following reasons.
Extreme tonal accuracy, +/- 1dB from 20Hz to 20KHz.
Non-ported enclosure for clean bass.
Fabric dome tweeter for smooth treble.
Phase/time aligned for accurate transient reproduction.
Non-parallel cabinet walls to minimize internal standing waves.
Quick signal drop off in waterfall plots.
Clean pulse and step response.
Auditioned them and enjoyed the best sound I have ever heard!

It is hard to describe these speakers for I believe they are pretty much fully accurate and transparent. They totally disappear when playing despite their 76 inch height and 300 lbs. each weight. When you slip in a SACD/CD the wall dissapears and becomes a music stage for the musicians. Others have noticed this too and are quite dissapointed when they get home only to find their speakers don't do the disappering act, you can hear where each speaker is. Dunlavy's are matched to withen 0.5dB of each other to ensure this.

These speakers have a certain cleanness and accuracy that is very hard to describe. When I was at the factory in Colorado springs and did A/B comparisons with other Dunalvy speakers these just sounded more open. It was like the band was in the open, on a hill outside or something. With the other speakers, though they sounded great, the music was slightly veiled. I believe this is born out by the waterfall plots of the Millenniums, very clean and quick decay.

The soundstage of these is excellent. With some source material you can hear sounds coming from beyond the left and right of the speakers. Instruments are accurately placed across the area between, and beyond, the speakers. The speakers totally disappear, when the singer and drums are between the speakers, that is where the sound is, you don't hear any sound from the speakers themselves. The sweet spot is only wide enough for one though. However, anywhere in the room the sound is tonally balanced and enjoyable, you just don't get that nice balanced imaging you do in the middle. This is what totally turned me off of planer speakers, their horrible off axis tonal balance, and their laughable bass for that matter.

Perhaps the most noteable aspect of the Millenniums is there stupendous bass. It is so clean you sometimes think its lacking. There is absolutely no boom, overhang, thump, or distortion, even at high levels. I must admit I am used to hearing the 100Hz hump on most cheaper speakers that simulate a good bass response. I notice songs sound different. The bass is very clean and deep too. You can feel deep bass that you couldn't with lesser speakers. Lest you think these speakers are lacking in bass, if you play a song that truely has bass, these will reproduce it in spades. It is just amazing to listen to songs and for the first time hear and feel the bass/drum line of the song very cleanly. There is lots more detail and nuances to be found in the deeper few octives of music than I was aware of before.

The mids are flawless too. Voices are clean and undistorted. Dianna Krall sounds fabulous. Here music with the bass and piano sounds simply stunning. Celine Dion sounds excellent too. The harshness and forwardness of her voice is subdued to some extent, more enjoyable. Though with some of her songs, let's face it, she's really hollering. Men's voices also are nice, never nasally or boomy, always clean.

The treble is so clean and accurate, it captures the metalic sheen of cymbols and other metalic instruments but you need SACD to really enjoy this. There is no brightness, exageration, or harshness to be found, unless it is in the recording. When I compare the treble of these to that of my Paradigm Studio 100's in the home theater room, there is no comparison. Fabric dome tweeters are some much cleaner than metal domes, more natural and enjoyable.

The speakers themselves are a joy to look at. Their looks really grow on you. You start to appreciate their unique hourglass shape. It is so gracefull. My wife, who about flipped when she first say them, way too big and ugly as sin. Now she likes their looks. When we have visitors the women are usually amazed my wife allows me to have them. All the guys drool. You can tell there is some prime sound able to be produced by these massive transducers. The speakers are actually larger than I am, I'm 6-3 and 250 lbs. The speakers have an inch and 50 lbs on me. My son calls them the speaker gods.

About the only thing I can say bad about them is how they reveal poor recordings. Imagine my dismay when two of favorite groups as a teenager have some bad recordings, Fleetwood Mac and Abba. I love listening to SACD music with these. Horns and violins are richer and not strident as they can be with normal CD's. Cymbols are more metalic. The soundstage is enhanced.

Is this the perfect speaker? Probably not, but I am very happy with it. To me it sounded even better than Dunlavy's top of the line SC-V and SC-VI's. For someone with some money to burn, fly out to Colorado and listen to them for yourself. I don't think any dealer carries these for demos.

Read up on the manufacturer's website for the theory behind these speakers. The time alignment of the drivers, the hourglass shape etc. It is www.dunlavyaudio.com. Good reading.
#8
News Updates / The new Dunlavy/Duntech Archive Forum
January 03, 2024, 09:24:41 AM
This forum was created in remembrance of the late John Dunlavy and his contribution to both the art and science of audio reproduction which has lived on in many of the loudspeaker systems that he created over the decades and are still being used today. Not only that many of the original concepts developed by John Dunlavy such as baffle felt have been used by many other speaker designers with little or no credit given back to John.

Click here to view the all new Dunlavy/Duntech Archive Forum

sovereign-diagram.fw.png
#9
News Updates / We are moving to new premises !
January 01, 2024, 10:06:49 AM
We have moved to much larger new premises in the last month which has been a mammoth task. Now need to unpack everything and set up the lab again. Now we have twice as much area as before and no more distractions which has put us out of action for quite a while now :(

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#10
Athena / Model Information
October 29, 2023, 07:13:22 PM
Waiting for more data !
#12
Sovereign 2001 / Brochures
October 29, 2023, 05:26:57 PM
#13
Sovereign 2001 / Websites of Interest
October 29, 2023, 05:24:17 PM
https://classic-hifi.net/product/duntech-sovereign-2001/

https://web.archive.org/web/20040906211613/http://www.apogeespeakers.com/reviews/a_search_for_the_ultimate_speaker_bestofaudio.htm
#14
Sovereign 2001 / Model Information
October 29, 2023, 05:21:16 PM
Sovereign 2001

Click here to download brochure hfe_duntech_sovereign_2001_brochure_en.pdf

#15
ULC Interconnects / Product Information
October 29, 2023, 04:41:09 PM
    (from left to right: Z6, ULC Reference RCA, ULC RCA, ULC Balanced Reference)
     
     
     
      Most audio system components, such as pre-amps, DAC’s, etc., are far from distortionless, regardless of their cost or level of design sophistication. In many instances, audible distortion can be traced to non-linear distortion products caused by load capacitance that adversely affects the transfer characteristics of the circuit. This problem is often encountered when the interconnect cable connecting a pre-amplifier to a power amplifier exhibits excessive capacitance (usually greater than 100 pico-Farads). Unfortunately, it tends to be a frequent occurrence with very high quality pre-amps that exhibit a high slew rate (a desirable property), but have a tendency to become unstable when feeding a capacitive load. But most interconnect cables exhibit nominal capacitance values that range from about 20 to more than 50 pico-Farads per foot. When this capacitance is considered in parallel with the input capacitance of typical power amplifiers, the total can easily exceed 100 pico-Farads for an interconnect cable only 1 meter in length; enough to become the source of audible distortion in many systems.
     
      In addition to causing the production of non-linear distortion products (harmonic, I.M., and transient types), such excess capacitance can also result in a roll off of the amplitude response at high frequencies, resulting in a loss of definition and/or the blurring of complex musical transients.
     
      Dunlavy Audio Labs ULC (Ultra Low Capacitance) Interconnect cables, with a nominal capacitance of a truly remarkable 8 pico-Farads per foot, ensures distortion free transmission for virtually all applications. This means that the signal remains virtually unchanged from one component to the next allowing the listener to hear the music with unparalleled clarity and resolution, even in extremely long runs.
     
      With the amount of components in today’s high end audio/video systems, one shouldn’t have to worry about cables negatively affecting the signal. With Dunlavy Audio Labs ULC Interconnects, you don’t have to.
     
      DAL ULC interconnect are available with standard RCA terminations, reference RCA terminations, and balanced (XLR) terminations.
     
     
       
Electrical:
Impedance:186 Ohms nominal
Resistance per foot
                (D.C.):
Less than 180 milli-Ohms for center conductor and less than 4 milli-Ohms for shield
Total loss for 3m length:Immeasurable over the 20 Hz to 20 kHz range
Capacitance per foot:8 pico-Farads nominal
Inductance per foot:290 nano-Henrys nominal
Amplitude and Phase response:Into an 10 K Ohm load, an 8 foot length of DAL ULC cable exhibits a drop of only 0.5 dB and a phase lag of only 30 degrees at 5 MHz (immeasurably flat from D.C. to 250 kHz)
Pulse-coherence factor:Terminated in 10 K Ohms, an 3 meter length of DAL ULC interconnect will reproduce 1 MHz square waves and 1 micro-second wide pulses with an accuracy indistinguishable from the output of the signal generator
Velocity of Propagation:Greater than 90%, relative to light in free space
Physical:
Size:0.265 inches in diameter
Color:Neutral tan
Lengths:Standard: 1 meter; 2 meter; 3 meter; 7 meter
Optional Lengths:Lengths from .5 meter to 30 meters +
Terminations:ULC Standard: RCA
                ULC Reference: Neutrik RCA
                ULC Balanced Reference: Neutrik XLR
- All terminations are heavily gold plated.
Inner and Outer Conductors:Patented multi-strand ultra pure silver plated copper wiring
     
#16
LCR Ultra / Product Information
October 29, 2023, 04:39:18 PM



Truly unique "LCR ULTRA" satisfies the need for an affordable loudspeaker cable with nearly ideal electrical properties, i.e., ultra-low loss, maximum bandwidth, pulse-perfect performance, etc.

Used within high quality audiophile systems, "LCR ULTRA" loudspeaker cables possess all the electrical properties required to ensure that no audible degradation of complex musical waveforms and transients can occur between the output terminals of a power-amp, and the input terminals of a loudspeaker.

Best of all, perhaps, its simple design and relatively low manufacturing cost result in a retail price that is well below that of most popular high-end audiophile loudspeaker cables.

And, unlike so many of today's expensive loudspeaker cables that exhibit questionable electrical attributes, DAL's "LCR ULTRA" cable was designed by a staff of highly competent engineers working in the exceptionally well-equipped laboratory facilities of Dunlavy Audio Labs.

Guaranteed Electrical Specifications

Series Resistance:
 less than 0.001 Ohms per foot.

Series Inductance: less than 0. 17 micro-Henrys per foot.

Parallel Capacitance: less than 20 pico-Farads per foot.

Attenuation: Virtually immeasurable at frequencies below 20 kHz, for a 20-ft. length terminated by a 4-Ohm resistive load.

Velocity of Propagation Factor: Greater than about 70% of the velocity of light in a vacuum.

Standard Lengths: 8, 12, 16, & 24 ft. (Other lengths are available by special order.)

End Connectors: Heavily gold-plated, large spades

Size: Approx. 0.75 in. wide by approx. 0.35 in. thick.

"LCR Ultra" Loudspeaker Cable is a Trademark of Dunlavy Audio Labs, Inc. (Patent Applied For)
#17
Z6 Cable / Product Information
October 29, 2023, 04:37:23 PM
    (from left to right: Z6, ULC Reference RCA, ULC RCA, ULC Balanced Reference)
     
     
     
      For many years, the design and performance of loudspeaker cables has been a subject shrouded in mystery. Comparison of cables, it seems, has been limited almost entirely to the vagaries of subjective evaluation. The extravagant and undocumented claims touted in almost all advertisements for cables has led sensible audiophiles to suspect that a substantial amount of snake-oil and buzzard-salve have been the key components of their "high-tech" designs. What has been lacking, but sorely needed, has been a sober approach based upon the application of sound engineering considerations and well known scientific principles.
     
      Now, with the Z6, a cable exists that was designed according to sound engineering and scientific principles. It’s accurately documented performance properties are truly relevant to how the cable interacts with the loudspeaker and the power amplifier - essential to obtaining accurate, unaltered reproduction of the most complex musical transients. It is a cable with a difference that can be measured by credible objective comparisons with other cables, offering the potential for audible improvements in music and movie sountrack reproduction. The Z6 represents a real engineering advance at an affordable price. Compared to other loudspeaker cables selling for much more, the DAL Z6 is truly without peer in every performance category.
     
      For example, most audiophiles are familiar with the need for carefully selecting a low-loss cable with an impedance that matches that of their television sets as a means of reducing picture blurring and ghosting. Unlike other loudspeaker cables, which exhibit impedances that range from 20 to over 100 Ohms, DAL Z6 exhibits an impedance of only 6 Ohms, insuring and excellent match to well-designed loudspeakers with average impedances ranging from 4 to 12 Ohms. As a consequence, Z6 loudspeaker cable eliminates almost all blurring and ringing of complex musical transients that other cables with much higher impedances cannot accurately reproduce.
     
      Further, the extremely linear amplitude and phase response of the DAL Z6 insures perfect reproduction of even the most delicate and detailed nuances found in music, compared to even the most expensive cables which suffer typical losses exceeding 2-3 dB at only 20 kHz.
     
      So forget all the subjective and fanciful claims of the competition, and recognize the distinct and real advantages that sound physics and proven scientific principles used in the design and manufacturing of the Z6 allow. It’s better because it is.
     
      Dunlavy Audio Labs Z6 loudspeaker cable is a Stereophile "Recommended Component."
     
      The DAL Z6 cable’s design is covered under United States patent #5,510,578 (April 23, 1996).
     
     
       
Electrical:
Impedance:6 Ohms, nominal.
Resistance per foot (D.C.):Less than 2.5 milli-Ohms
Total loss for 8ft. length:Immeasurable over the 20 Hz to 20 kHz range into an 8 Ohm resistive load
Capacitance per foot:340 pico-Farads
Inductance per foot:21.8 nano-Henrys
Amplitude and Phase response:Into an 8 Ohm load, an 8 foot length of Z6 cable exhibits a drop of only 0.5 dB and a phase lag of only 30 degrees at 5 MHz (immeasurably flat from D.C. to 250 kHz)
Pulse-coherence factor:Terminated in 8 Ohms, an 8 foot length of DAL Z6 cable will reproduce square waves up to 1 MHz with an accuracy indistinguishable from the output of the signal generator
Physical:
Size:0.5 inches in diameter
Color:Neutral tan
Lengths:Standard: 8 foot; 12 foot; 16 foot; 24 foot singles and pairs
Optional Lengths:Lengths from 6 inches to 100 feet
Terminations:
BN4: Banana pin
                GS4: 1/4 inch spade
                GGS4: 3/8 inch spade
- All terminations are heavily gold plated in six inch lengths. Terminations employ unique threaded bolt application system for easy end user installation.
Internal Wiring:Patented multi-strand high purity silver plated copper wiring. (US Patent # - 5,510,578; 4/23/96)
#18
PCL25 / Model Information
October 29, 2023, 03:46:57 PM
Duntech PCL25                 

         
       
          The DUNTECH PCL25 Loudspeaker has been designed for the discerning listener who demands very accurate sound reproduction from a small package. And at an affordable price.
          The PCL25 is faithful to the design philosophies that encompass all DUNTECH loudspeakers, and for which Duntech Audio has received international acclaim.
          The technology is further enhanced by hand-crafted cabinets, which are finished in authentic timber veneer with acoustically transparent black grille cloth.
          What makes the PCL25 better?
          The DUNTECH PCL25 Loudspeaker is a two way, three driver design in which the drivers are arranged in a symmetrical fashion along a vertical axis. This creates a simulated point-source radiation pattern.
          To achieve proper stereo-imaging and depth, loudspeakers must possess point-source radiation patterns when reproducing music recorded by microphones, which are themselves point-source devices.
          Music as is should be heard
          The sound from the PCL25 will arrive at your ears simultaneously. It will be low in distortion and sound extremely well-focussed, giving an almost transparent quality. So, the music you hear will create the feeling of "being there", as if your were hearing it played "live".
          This is the ultimate benefit of DUNTECH pulse coherent technology... excellent stereo-imaging, depth and clarity.
          And, when you consider the price of the PCL25 and the inclusion of a 5 year warranty, it all adds up to a remarkable loudspeaker package.
         
         
         
         
           
         
          Time-aligned for greater music accuracy
            The three drivers in the PCL25 are accurately time-aligned. This means the radiating centres of the drivers are exactly equidistant at the normal listening distance of 3.5 metres.
            Accurate time-alignment of the drivers is one of a number of design features that Duntech has collectively labelled "pulse-coherent". Pulse coherency determines the ability of a loudspeaker to reproduce complex musical sounds without blurring or smearing. It allows a loudspeaker to faithfully reproduce sound as it is heard naturally by the human ear.

Electrical
Frequency Response
          Measured at 3.5M (11.5ft) on the tweeter axis
55Hz-20KHz
          ±3dB
Efficiency
          Referenced at 1M (3.3 ft) on tweeter axis with an input of 2.83 volts RMS (1 watt at 8 ohms)
89dB SPL
Nominal Impedance4 ohms
          Variance 3.5-6.5
Power Rating
          Peak power for 10 µS
500 watts
Recommended Amplifier Power
          Minimum RMS per channel
30 watts
Pulse Coherency Factor
          Propagation time error at 3.5M (11.5 ft) on the tweeter axis
Less than
          10µS
Harmonic Distortion
          Referenced at 1M (3.3 ft) on the tweeter axis with an input of 2.83 volts RMS (1 watt at 8 ohms)
Less than
          0.5% THD
          above 100Hz
Phase Variation versus Frequency
          Varies less that ±35 deg
150Hz to 15Khz
CrossoverFirst order type
Drivers
          Bass
          Tweeter
          2x160mm (6.3")
          1x25mm (1")
Input TerminalsGold plated, accepts bonana, spade or cable connections
Bi-WiringYes
Passive Bi-AmplificationYes
Footnote: All measurements taken at ambient temperature of 23°C (72°F)
Mechanical
FinishAvailable in Jarrah, Brazilian Rosewood and Black Oak.
Size
          Height
          Width
          Depth
          606mm (24")
          268mm (11")
          350mm (14")
Weight
          Per cabinet unpacked
          20Kg
          (44lbs)
WarrantyFive (5) years, subject to Duntech Audio Warranty Policy
StandOptional
#19
PCL10 / Model Information
October 29, 2023, 03:44:49 PM
Duntech PCL10

Price / Performance Breakthrough


 

The new DUNTECH PCL10 Loudspeaker has been designed to delight music lovers who are on a tight budget or have small listening rooms.

Faithful to DUNTECH design philosophy that has produced products which have won international acclaim, the PCL10 proudly carries DUNTECH quality to its least expensive price point.

The diminutive PCL10 was engineered without compromise to possess all of the characteristics of true DUNTECH 'pulse coherent' loudspeakers - musicality, transient precision and accuracy - all necessary features of a live performance.

Big Sound from a Small Speaker

The PCL10 delivers a sense of scale that is truly amazing for such a small loudspeaker. Even large symphonic works are rendered realistically in space. Exceptionally even tonal balance and a very high resolving power are features of this very revealing loudspeaker.

Finished in stunning Australian Jarrah veneer, the PCL10 will find appeal as an audiophile quality loudspeaker in its own right for both home and professional use.

The PCL10 Loudspeaker is a proud addition to the DUNTECH family of products that are distinguished by a level of documented performance which clearly demonstrates their superiority.




 

What Makes the PCL10 so Special?
The choice of the very latest technology drive units and first order crossover result in near perfect amplitude and phase response.
Amplitude response is very flat at ą dB from 80Hz to 20kHz, with useful extension below 60Hz (-3dB at 70Hz).

Sensitivity of 85dB and impedance at a well behaved 6 ensures this speaker can be used with a wide range of amplifiers.
 

Electrical
Frequency Response
          Measured at 3.5M (11.5ft) on the tweeter axis
80Hz-20kHz
          ą 2dB - 3db down 70Hz
Efficiency
          Referenced at 1M (3.3 ft) on tweeter axis with an input of 2.83 volts RMS (1 watt at 8 ohms)
85dB SPL
Nominal Impedance6 ohms
Power Rating
          Peak power for 10 ľS
200 watts
Recommended Amplifier Power
          Minimum RMS per channel
60 watts
Pulse Coherency Factor
          Propagation time error at 3.5M (11.5 ft) on the tweeter axis
Less than
          10ľS
Phase Variation versus Frequency
          Varies less that ą35 deg
150Hz to 15kHz
          Varies less than ą20°
CrossoverFirst order type
Drivers
          Bass
          Tweeter
          1x110mm (4.3")
          1x10mm (.8")
Input TerminalsGold plated, accepts bonana, spade or cable connections
Bi-WiringYes
Passive Bi-AmplificationYes
Mechanical
FinishAvailable in Jarrah, Brazilian Rosewood and Black Oak.
Size
          Height
          Width
          Depth
          275mm (11")
          170mm 6.8")
          226mm (9")
PlacementTripod, shelf or stand -
          35mm camera tripod fitting standard
          Wall mount bracket optional extra
WarrantyFive (5) years, subject to Duntech Audio Warranty Policy and return of Warranty Registration Form
StandOptional
#20
Ruby / Model Information
October 29, 2023, 03:43:46 PM
    Duntech Ruby
     
       
     
      The Ruby is an amazingly powerful speaker despite it's compact size. The sound is full and detailed and combined with handcrafted cabinets made from the finest Australian and imported timbers this loudspeaker will appeal to many. Every component used in the construction is tested and ensured of meeting the quality required before being applied. The Ruby is well named as being a precious gem and will provide an insight to many new facets of your favourite music.

       
     
      The Ruby is a two driver two way design using a Damped Polymer Composite (DPC) magnetically shielded driver. This driver uses a low loss rubber surround to eliminate the possibility of deterioration over time. The drivers, including the tweeter, utilise Hexatech Aluminium wire voice coils wound on Aluminium formers, this provides superior power handling and eliminates dynamic compression due to heating. The Bass/midrange driver has a huge 75mm voice coil which evenly drives the shallow profile cone, reducing cone break up and reducing distortion at high power levels. The tweeter is treated with diffraction controlling felt and is positioned to be time collimated with the bass driver. The cabinet itself is constructed of MDF (medium density fibre) up to a thickness of 40mm. Hardened steel spikes are also provided with every loudspeaker which are secured to the cabinet by means of integral steel threaded inserts. The Ruby is wired internally with heavy gauge low loss silver plated cable and provided with high quality gold plated terminals. 
                             
Frequency Response40Hz - 18KHz ą 3dB
Efficiency86.5dB SPL
Impedence8 ohms Nominal
Recommended Amplifier
                Power
30w RMS
Power Rating150 Watts 500 Watts peak power
Dimensions780mm High, 205mm Wide, 320mm Deep
Weight15kg
FinishAustralian Jarrah, Brazilian Rosewood,
                Black woodgrain. Other finishes
                available on request.