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[DAL Cantata]

DAL Cantata




The task of designing an efficient, "pulse-coherent" loudspeaker with an extremely flat frequency response and tight, low-end bass has traditionally required either a very large sealed enclosure or a smaller, ported enclosure that produced boomy-sounding bass.

However, DAL's research staff have succeeded in designing the CANTATA(TM), a visually attractive loudspeaker of relatively small size that reproduces tight, low-end bass (down only -4 dB at 20 Hz). The anechoic-chamber response of the CANTATA(TM) meets a tight, guaranteed +/- 1 dB spec from 35 Hz to 20 kHz at 10-ft. (on-axis/anechoically). And, with a sensitivity rating of 90 dB (re: 1 meter on-axis), almost any high-quality audiophile amplifier, with a power rating exceeding 40 watts, will be adequate to drive the CANTATA(TM) to a very loud 106 dB SPL on peaks.

Imagine - all of this from a loudspeaker of modest size, with an unusually attractive appearance and outstanding "build-quality" - at a suggested retail price low enough to comfortably accommodate most tight budgets. Indeed, DAL sincerely believes the CANTATA(TM) to be without peer with respect to quality and performance among loudspeakers of comparable size and price.

So! If you have been waiting for a visually elegant loudspeaker of relatively small size, with virtually flawless reproduction and an affordable price tag, you owe it to yourself to audition the CANTATA(TM) at your favorite DAL dealer.

CANTATA(TM) is a Registered Trademark of DAL


 

FREQUENCY RESPONSE:	35-20,000 Hz, +/- 1 dB. Minus 4 dB at approximately 20 Hz. (Measured on- axis at a distance of 10-12 feet within a large anechoic chamber.)
SENSITIVITY:	Approximately 90dB SPL (ref: 1 meter, on-axis) for an input level of 2.83 Volts RMS.
IMPEDANCE:	Nominal 4 ohms (3 ohms minimum and 7 ohms maximum)
PULSE-COHERENCE:	An impulse response equal to or better than most top-of-the-line CD players and Digital Processors.
RADIATION PATTERNS:	Precisely symmetrical in both horizontal and vertical planes (above about 80 Hz.).
DIFFRACTION DISTORTION:	Virtually eliminated by the use of efficient sound-absorbing material on all relevant surfaces. (US Patent #4,167,985)
DRIVERS:	- One 10", hi-performance, carbon-fiber, "down-firing" woofer           - Two 6-1/2" bass/mids           - One 1" dome tweeter.
RECOMMENDED AMPLIFIER POWER:	Minimum of 40 watts/channel into 8 ohms (for maximum enjoyment of the loudspeakers dynamic range)
RECOMMENDED LISTENING DISTANCE AND ROOM SIZE:	8 to 12 feet, on axis, in a room not smaller than about 12 feet by 18 feet.

 

SIZE:	52" high by 12" square with a 16" square base
WEIGHT:	Approximately 85 pounds (each), incl. base
GRILL:	-Frame: Acoustically transparent, precision machined steel frame.           -Cloth: Acoustically transparent black weave
MATERIAL:	Veneered MDF, varying in thickness from 3/4" to 1.5". The internal volume is optimally filled with high-quality open-cell foam to achieve appropriate absorption and damping of internal acoustical energy.
FINISHES:	Standard: light or black Oak. Also available in Dalwood Rose, Cherry, etc. at a slight additional cost.

[DAL Aletha II/Corinthian IIALETHA:]

DAL Aletha II/Corinthian II

ALETHA:




Designing an efficient, "pulse-coherent" loudspeaker that exhibits a near ruler flat frequency response, near perfect impulse response and step response, as well as having exemplary bass response has traditionally required a sealed enclosure with a very large internal volume. Design alternatives for shrinking enclosure size without suffering a significant loss in efficiency, have utilized ports, vents or other devices which have resulted in higher levels of distortion and unnatural bass reproduction.

Thus, while some alternative design approaches have permitted an extension in low bass response from relatively small enclosures, they have, more often than not, compromised the overall accuracy and quality of the sound.

However, recent research at Dunlavy Audio Labs has made possible the design of the Aletha. A moderately sized loudspeaker with an elegant, artistic appearance that has a high SPL rating (approximately 91 dB), and the capability to reproduce, with astonishing accuracy, lower octave bass information.

This remarkable achievement was accomplished by matching the relevant properties of a 10" woofer with the acoustical properties of a well-damped, sealed enclosure. An SPL increase of nearly 3 dB at low bass frequencies was obtained by taking advantage of the "mirror-imaging" enhancements available with a downward firing woofer radiating through a circular slot aperture just above the floor level. Although downward firing woofers have been tried before, Dunlavy Audio Labs believes that the Aletha is the first loudspeaker to make full and effective use of this design.

Further, the hexagonal shape of the Aletha yields virtually diffraction free performance, with an optimally wide, symmetrical radiation pattern in both vertical and horizontal planes above approximately 80 Hz. Below this frequency, the radiation becomes essentially omni-directional, which fills the listening room with bass energy that can be felt as well as heard.

The Aletha represents a new concept in loudspeaker design where performance, aesthetics, and price/value have come together to create one of the truly remarkable high end audio loudspeakers of all time.

CORINTHIAN I:




Possessing the attractive shape and appearance of a short classical Greek column (including vertical "flutes" along its sides), the Corinthian I (TM) is elegantly finished to resemble beautiful marble, making it a visually welcome addition to almost any listening room.

Equally important, the Corinthian I (TM) (like DAL's larger Corinthian II (TM)) is an extremely accurate loudspeaker, both measurably and audibly. Its well-documented accuracy is achieved by means of a symmetrical, vertical, "time-aligned" array of mid-twt-mid drivers covering the important range above about 300 Hertz (with the tweeter at ear level for seated listeners). This array of drivers is fed by a phase and amplitude corrected crossover network that yields precise reproduction of complex waveforms. A single, down-firing, high-compliance woofer provides full-range, omni-directional, spine tingling bass response down only 4 dB at 20 Hz.

The enclosure's hexagonal shape (nearly cylindrical) yields virtually diffraction-free performance, with optimally-wide, symmetrical radiation patterns in both vertical and horizontal planes, above about 80 Hz. Below this frequency, the loudspeaker becomes essentially omni-directional - filling the listening room with bass energy that can be felt as well as heard. The anechoic-chamber response of the Corinthian I (TM) meets a tight, guaranteed +/- 1 dB spec from 35 Hz to 20 kHz at a distance of 10-ft. (on-axis/anechoically). And, with a sensitivity rating of 90 dB (re: 1 meter on-axis), almost any high-quality audiophile amplifier, with a power rating exceeding 40 watts, will be adequate to drive the Corinthian I (TM) to a very loud 106 dB SPL on peaks.

Imagine - all of this from a loudspeaker with an unusually attractive, CLASSICAL appearance and outstanding "build-quality" - at a suggested retail price low enough to comfortably accommodate most budgets. Indeed, DAL sincerely believes the Corinthian I (TM) to be without peer with respect to quality and performance among loudspeakers of comparable size and price.

So! If you have been waiting for a visually elegant loudspeaker with virtually flawless, full-range reproduction and an affordable price tag, you owe it to yourself to audition the Corinthian I (TM) at your favorite DAL dealer.

"Corinthian" and "Aletha" are Registered Trademarks of Dunlavy Audio Labs, Inc.


 

AMPLITUDE/FREQUENCY RESPONSE:	35 Hz to 20 kHz, +/- 1 dB, -4 dB @ 20 Hz (anechoic).
EFFICIENCY:	Approximately 90 dB SPL (ref: 1 meter, on-axis) for an input level of 2.83 Volts RMS
IMPEDANCE:	Nominal 4 ohms (min.=3 ohms; max.=7 ohms)
PULSE-COHERENCE:	Impulse response is equal to or better than most top-of-the-line CD players and Digital Processors (at 10 ft. on-axis)
RADIATION PATTERNS:	Precisely symmetrical in both horizontal and vertical planes above about 80 Hz
DIFFRACTION DISTORTION:	Virtually eliminated by the use of efficient sound-absorbing material on all relevant surfaces. (US Patent #4,167,985)
DRIVERS:	-One 10" woofer (cast basket, high damping rubber surround, carbon fiber cone)           -Two 6.5" Mid-Bass (cast basket, high damping rubber surround)           -One 1" composite textile dome tweeter.
CROSSOVER AND INTERNAL WIRING:	First order design. Biwire, biamp capability. High voltage, metal film capacitors. Precision machined wound, heavy gauge, high purity copper coils. CAD designed Mil spec fiberglass PC boards utilizing high purity copper traces. Internal wiring via individually isolated ultra pure, proprietary copper cables.
RECOMMENDED AMPLIFIER POWER:	Recommended minimum of 60 watts into 8 Ohms.
RECOMMENDED LISTENING DISTANCE AND ROOM SIZE:	8 to 12 feet, on axis, in a room not smaller than about 15 feet by 20 feet.

 

SIZE:	52" (1320mm)H x 14" (356mm)W x 14" (356mm)D
WEIGHT:	105 lb (48 kg) each
MATERIAL:	3/4" MDF, hardwood corners, architectural hardwood veneers
ALETHA FINISH:	Standard: light or black Oak.           Optional: Rosewood, Cherry or Natural Cherry.
CORINTHIAN I           FINISH:	A simulated, "White Marble" finish is hand applied to closely resemble real "white/gray" marble
GRILL:	Frame: Acoustically transparent, precision machined steel frame.           Cloth: Acoustically transparent black weave

Frequency Response






Impulse Response






Step Response






Impedance

http://www.audioreview.com/product/speakers/floorstanding-speakers/dunlavy/athena.html

http://www.highendnews.info/reviews/DAL-AlethaCordesman.htm

https://vintagehifiproducts.wordpress.com/2011/12/28/dunlavy-audio-labs-dal-aletha/

https://vintagehifiproducts.wordpress.com/2011/12/28/dunlavy-audio-labs-dal-aletha/

[DAL Aletha/Corinthian I ALETHA:]

 DAL Aletha/Corinthian I
     
      ALETHA:
     
     
     
     
      Designing an efficient, "pulse-coherent" loudspeaker that exhibits a near ruler flat frequency response, near perfect impulse response and step response, as well as having exemplary bass response has traditionally required a sealed enclosure with a very large internal volume. Design alternatives for shrinking enclosure size without suffering a significant loss in efficiency, have utilized ports, vents or other devices which have resulted in higher levels of distortion and unnatural bass reproduction.
     
      Thus, while some alternative design approaches have permitted an extension in low bass response from relatively small enclosures, they have, more often than not, compromised the overall accuracy and quality of the sound.
     
      However, recent research at Dunlavy Audio Labs has made possible the design of the Aletha. A moderately sized loudspeaker with an elegant, artistic appearance that has a high SPL rating (approximately 91 dB), and the capability to reproduce, with astonishing accuracy, lower octave bass information.
     
      This remarkable achievement was accomplished by matching the relevant properties of a 10" woofer with the acoustical properties of a well-damped, sealed enclosure. An SPL increase of nearly 3 dB at low bass frequencies was obtained by taking advantage of the "mirror-imaging" enhancements available with a downward firing woofer radiating through a circular slot aperture just above the floor level. Although downward firing woofers have been tried before, Dunlavy Audio Labs believes that the Aletha is the first loudspeaker to make full and effective use of this design.
     
      Further, the hexagonal shape of the Aletha yields virtually diffraction free performance, with an optimally wide, symmetrical radiation pattern in both vertical and horizontal planes above approximately 80 Hz. Below this frequency, the radiation becomes essentially omni-directional, which fills the listening room with bass energy that can be felt as well as heard.
     
      The Aletha represents a new concept in loudspeaker design where performance, aesthetics, and price/value have come together to create one of the truly remarkable high end audio loudspeakers of all time.
     
      CORINTHIAN I:
     
     
     
     
      Possessing the attractive shape and appearance of a short classical Greek column (including vertical "flutes" along its sides), the Corinthian I (TM) is elegantly finished to resemble beautiful marble, making it a visually welcome addition to almost any listening room.
     
      Equally important, the Corinthian I (TM) (like DAL's larger Corinthian II (TM)) is an extremely accurate loudspeaker, both measurably and audibly. Its well-documented accuracy is achieved by means of a symmetrical, vertical, "time-aligned" array of mid-twt-mid drivers covering the important range above about 300 Hertz (with the tweeter at ear level for seated listeners). This array of drivers is fed by a phase and amplitude corrected crossover network that yields precise reproduction of complex waveforms. A single, down-firing, high-compliance woofer provides full-range, omni-directional, spine tingling bass response down only 4 dB at 20 Hz.
     
      The enclosure's hexagonal shape (nearly cylindrical) yields virtually diffraction-free performance, with optimally-wide, symmetrical radiation patterns in both vertical and horizontal planes, above about 80 Hz. Below this frequency, the loudspeaker becomes essentially omni-directional - filling the listening room with bass energy that can be felt as well as heard. The anechoic-chamber response of the Corinthian I (TM) meets a tight, guaranteed +/- 1 dB spec from 35 Hz to 20 kHz at a distance of 10-ft. (on-axis/anechoically). And, with a sensitivity rating of 90 dB (re: 1 meter on-axis), almost any high-quality audiophile amplifier, with a power rating exceeding 40 watts, will be adequate to drive the Corinthian I (TM) to a very loud 106 dB SPL on peaks.
     
      Imagine - all of this from a loudspeaker with an unusually attractive, CLASSICAL appearance and outstanding "build-quality" - at a suggested retail price low enough to comfortably accommodate most budgets. Indeed, DAL sincerely believes the Corinthian I (TM) to be without peer with respect to quality and performance among loudspeakers of comparable size and price.
     
      So! If you have been waiting for a visually elegant loudspeaker with virtually flawless, full-range reproduction and an affordable price tag, you owe it to yourself to audition the Corinthian I (TM) at your favorite DAL dealer.
     
      "Corinthian" and "Aletha" are Registered Trademarks of Dunlavy Audio Labs, Inc.
     
     
       

AMPLITUDE/FREQUENCY RESPONSE:	35 Hz to 20 kHz, +/- 1 dB, -4 dB @ 20 Hz (anechoic).
EFFICIENCY:	Approximately 90 dB SPL (ref: 1 meter, on-axis) for an input level of 2.83 Volts RMS
IMPEDANCE:	Nominal 4 ohms (min.=3 ohms; max.=7 ohms)
PULSE-COHERENCE:	Impulse response is equal to or better than most top-of-the-line CD players and Digital Processors (at 10 ft. on-axis)
RADIATION PATTERNS:	Precisely symmetrical in both horizontal and vertical planes above about 80 Hz
DIFFRACTION DISTORTION:	Virtually eliminated by the use of efficient sound-absorbing material on all relevant surfaces. (US Patent #4,167,985)
DRIVERS:	-One 10" woofer (cast basket, high damping rubber surround, carbon fiber cone)                 -Two 6.5" Mid-Bass (cast basket, high damping rubber surround)                 -One 1" composite textile dome tweeter.
CROSSOVER AND INTERNAL WIRING:	First order design. Biwire, biamp capability. High voltage, metal film capacitors. Precision machined wound, heavy gauge, high purity copper coils. CAD designed Mil spec fiberglass PC boards utilizing high purity copper traces. Internal wiring via individually isolated ultra pure, proprietary copper cables.
RECOMMENDED AMPLIFIER POWER:	Recommended minimum of 60 watts into 8 Ohms.
RECOMMENDED LISTENING DISTANCE AND ROOM SIZE:	8 to 12 feet, on axis, in a room not smaller than about 15 feet by 20 feet.

     
     
     
       

SIZE:	52" (1320mm)H x 14" (356mm)W x 14" (356mm)D
WEIGHT:	105 lb (48 kg) each
MATERIAL:	3/4" MDF, hardwood corners, architectural hardwood veneers
ALETHA FINISH:	Standard: light or black Oak.                 Optional: Rosewood, Cherry or Natural Cherry.
CORINTHIAN I                 FINISH:	A simulated, "White Marble" finish is hand applied to closely resemble real "white/gray" marble
GRILL:	Frame: Acoustically transparent, precision machined steel frame.                 Cloth: Acoustically transparent black weave

     
     
      Frequency Response
       
       
     
     
     
     
      Impulse Response
       
       
     
     
     
     
      Step Response
       
       
     
     
     
     
      Impedance
       
     

https://web.archive.org/web/20020609170619/http://www.dunlavyaudio.com/audio_files/Signature.htm

Dunlavy Audio Labs, Inc.

33482.pdf

• Vifa M10MD-39-08 4.5 inch Midrange
• Vifa P13WG-10-04 5 inch Woofer
• Vifa P13WG-00-08 5 inch Woofer
• Vifa M26WR-09-08 10 inch Woofer
• Vifa M30W0-49-08 12 inch Woofer
• TYMPANY D27TG35-06 25mm Dome Tweeter

https://www.stereonet.com/forums/topic/123400-duntech-speakers-owners-discussion-thread/#comments

• SCANSPEAK D7608/920010 76mm Dome Midrange
• Dynaudio D-54AF 2-inch Soft Dome Midrange
• Audax HD17B25J 17 cm 6.5 inch Bass-Midrange
• Dynaudio 17W-75 17cm Woofer
• Dynaudio 30W-100 12 inch Woofer
• Dynaudio 24W-75 9 inch Woofer
• Scanspeak 13M/8640-00 4 inch Midrange
• Audax RW010F1 10mm Dome Tweeter
• Audax HM170C0 6.5 inch Bass Midrange

Since our original facebook page was hacked we were never able to recover the ability to login no matter what we did so we gave up on it. Since then facebook has upgraded its security with 2FA so it is harder for hackers to do this.

Anyway, rather than keep hitting our heads against a brickwall trying to recover the unrecoverable I have created a new facebook page at https://www.facebook.com/NewAnalogPrecision

And for those playing along at home the old facebook page is still accessible

https://www.facebook.com/AnalogPrecision/

Years in the making, this is part of a cost-no-object Active Speaker System we are designing for a client which replaces half a million dollar worth of stereo separate components including exotic cables, expensive power conditioners/re-generators and power distribution boards which offer little or no benefit or value to our system. It has a total name-plate power-rating of ten times that of the stereo amp it replaces with superior distortion and noise and an aggregate instantaneous current rating of 180 amps per channel with all channels driven !!

The heart of each speaker is the Active Speaker Integrated Controller (ASIC) used to integrate all speaker drivers, amplifiers and supervisory circuits. Each speaker has one ASIC and is connected to the source units through a central hub which is also custom designed for this application and which interfaces to each satellite plate via our 2nd generation Perfect-Link II interface which has been fully updated for this application. Both speakers and Preamp/Hub are fully electrically and galvanically isolated from each other so there are no ground loops to cause interference. Because of this the speakers and Preamp/Hub can be plugged into different circuits of the house without any detrimental effects on performance and which offers full transparency compared to any analog type of interconnections which are difficult to isolate without compromising fidelity.

Designed from the ground up the ASIC contains its own DSP with its own custom DSP firmware and provides levels of integration that is unmatched by any separate stereo components irrespective of their cost, size or weight ! We've gone through over fifty design iterations on the drawing board and gilded the lily on this design and left no stone unturned, so it should come as no surprise that to achieve the same level of integration using separate components is a practical impossibility ! However, all of this hardware would be of little use if there wasn't a way to tie all of the pieces together in a unified way.

For this reason, a brand new software application called the System-Builder was developed from the ground up specifically for the hardware which for the first time allows a complete N-way speaker system to be accurately specced, modelled, configured and measured from start to finish whilst maintaining strict tolerances on quality and performance. With our own proprietary driver stitching technology the system is essentially driver agnostic but we recommend using quality components throughout along with the higher dynamic output capability of using multiple amplifiers in an active system will guarantee clean full fidelity output up to concert levels without fatigue due to the absence of dynamic limits imposed by a single amplifier driving a passive speaker system. A thermal management system is provided for harsh environments with extreme ambient temperature variations.

One of the benefits of such a system is that every part is made to seamlessly work together with the others and there are no issues with mismatches between components nor is there the added expense of buying amplifiers, cables, preamps, DAC's, crossover and hoping they all work together because all of this is already provided with the system. Because of the systems approach to designing the speaker we can't use an off-the-shelf DSP system with it's canned user interface simply because it is not suitable for this application and totally inadequate for the job. Also the oversimplified DSP capability just cannot do what we need which is why we had to build our own hardware and write our own custom DSP code and operating system kernel from the ground up. This gives us a competitive advantage over other vendors who don't build their own electronics in-house. which means we can do things that other speaker vendors can only dream about so they are ill equipped to design and build their own electronics and are solely dependent on the vendor of the electronics that supply them.

The only thing we don't supply is the source units so please add your own "sauce". However, with the advent of some outstanding low cost SOTA streaming solutions that partner really well with our electronics we prefer to focus our attention on the development of a SOTA speaker system and leave the source units to the source unit aficionados ! Our new 60 page whitepaper goes into great detail to explain many of the ground breaking concepts used in this exciting new speaker system. For those who could not previously afford the best now you can without the limitations of a passive system !



PS. Have a nice day Marc

[The Australian Tesla killer that never was]

We gave billions to foreign car corporations whilst ignoring our own and now we are importing electric cars. Where are those car companies now ? That's what they do here as usual

https://www.evolutionaustralia.com.au/single-post/the-australian-tesla-killer-that-never-was

The Australian Tesla killer that never was
What do you get when you cross an electric motor with a Hyundai Getz?


The Blade Electric Vehicle concept was born in Castlemaine way back in 2008 and is the very first electric vehicle to be registered here in Victoria.


Only a couple of hundred of these vehicles were built by EV visionary Ross Blade and, being such an EV unicorn 12 years ago, were snapped up by local and New Zealand enthusiasts - but only those who could afford the eye-watering (then) price of $48,000.


The attraction of converting a Getz is clear; it's a light and relatively inexpensive vehicle that is easy to drive and pretty robust. Batteries took up minimal space in the rear of the car and a retrofitted electric motor in the front.


Even more impressively, Blade gained some measure of support from Hyundai themselves who agreed to honour the warranty on parts that came standard with the ICE version of the vehicle.


The Blade Electron offered a range of 100kms and 90Nm of torque, with a lithium ion phosphate powered electric motor; not eyebrow raising these days, but not bad for such an early generation EV; or what we're calling The Australian EV1.


Could this have been Australia's big EV moment?

In an interview with carsales.com.au in 2008, Mr Blade obviously had big plans for his start-up, citing distribution of 200 vehicles a year to New Zealand and stating:


"Strategically, there are a few directions we could go in. We could, for example, become the supplier of a kit that is used for the millions of Getz around the world; we could become a retrofitter; we could be a source of IP, because we've developed and registered a range of IP -- so there are a number of ways in which our business could unfold in the future."


In the same piece, his comments around battery technology are also an interesting look at how far we've come (or not) since then:


"When you look at what the major car manufacturers are doing -- take GM for example -- they're looking at two chemistries: lithium-manganese and lithium-ion phosphate. Nissan is looking at lithium-manganese. The major car manufacturers are looking at these more recent alternate forms of lithium batteries. The reason is: they have longer life, they're more temperature-stable -- and they don't blow up."

The Blade Electric Vehicle company received a $100,000 injection of cash from the (then) federal Minister for Transport and Infrastructure, now leader of the opposition, Anthony Albanese, in 2010. The Electron also met all Australian design and safety standards at the time and the future seemed bright for this early EV start up.


But despite this bright start, the Blade Electric Vehicle company - along with the 54 EVs they converted - seems to have sunk without a trace.


How to service a Blade Electron EV

Most of our team hadn't seen one in the wild...until recently.


This low kilometre, neat-as-a-pin car came to our workshop for EV servicing and has been a prime topic of nerdy-EV conversation for the past week.


We shot a little video of this unicorn EV in action, and our mechanic Julian had this to say:


"The Electron came to us with a couple of issues, the first that it wouldn?t stop you from driving off with the charging cable connected so we retrofitted the car with a smart electric charge controller and a module to stop you driving off while charging.


We also performed a battery balance and general check over. This Blade only has 24,000kms on the clock so everything is nice, it?s been put together really well."


Check out the video below and we're really keen to know if you own a Blade Electron or have driven one.

[At 48 KHz Total Tap count = 16384 tapsAt 96 KHz Total Tap Count = 8192 tapsAt 192 KHz Total Tap Count = 4096 taps]

When designing FIR filters it is important to note the limitations of the DSP in handling the filter. The tap count of the DSP is dependent on the clock rate of the DSP and the number of clocks needed to perform a multiply accumulate (MAC).

For the ADSP-21489 SHARC used on the UP the DSP is clocked at 392MHz since it is syncro-locked to the master clock of 49.152MHz and not an asynchronous 400MHz clock as used in most designs.

Since the SHARC can achieve two Multiply-Accumulates (MACS) in one clock cycle because of the SIMD capability the SHARC is capable of 786 MMACS. To get the tap count per sample clock divide 786432000 by the sample rate. For example:-

At 48 KHz Total Tap count = 16384 taps
At 96 KHz Total Tap Count = 8192 taps
At 192 KHz Total Tap Count = 4096 taps

These are the theoretical maximum tap counts for a given sample rate and then you need to divide that amongst the number of filters used. However Audioweaver has another trick up its sleeve to expand the tap capability by down sampling to a much lower sample rate which would be appropriate when building a filter to process low frequency information for a woofer etc. For example if you are only interested in processing bass then you could theoretically down sample from 192KHz to 3Khz which would expand the tap capability by 64 times from 4096 to 2621444 taps. Once you have done all of the processing at 3kHz then you up sample back to 192kHz !

If you need huge tap count at the native sample rate then the UPP is the way to go by offloading the DSP duties onto external PC hardware. See here for more info https://analog-precision.com/forum/wiki-and-qa/extending-the-dsp-capability-of-the-ultimate-preamplifier-plus/

Regards
AP

Willsenton Audio The gift that keeps on giving back to itself courtesy of stereonet !

Congratulations to Willsenton audio for reaching 400 pages of free forum advertising and over 10,000 replies to date, all courtesy of stereonet. That should have added significantly to their bottom line and nothing to stereonets for all of the sales of their tube amps. Even though Willsenton Audio is not a sponsor of stereonet and doesn't even feature in their brands listings we believe that Willsenton Audio should be awarded with a stereonet Applause Award for their outstanding contribution to the Chinese economy and reaching the 400 page milestone without contributing or spending a single cent in Australia with stereonet !!

We'd hate to think how many Chinese made amps have been sold and sales lost from the local sponsors because of this thread. Maybe one or two for each page of the thread at the very least
We would like to offer Willsenton Audio an unofficial stereonet Applause Award for all of their efforts and sponsorship to the stereonet “community� to date which just happens to be zilch !

Too bad if you are a local tube amp manufacturer and I know there are still some left here in Oz but don't be dissuaded by this apparent double standard. It's what stereonet are good at doing. Destroying what's left of the industry in this country and stacking the scales in favour of yet more imports. And make sure you remove your website URL from your signature because we wouldn't want you to have an unfair advantage over the paying sponsors would we. On behalf of all of the local aussie hifi manufacturers left thanks again stereonet for nothing

Hopefully we will see them back in Melbourne too

See if you can find this on stereonet ? I almost missed it when I was reading the latest "Australian Hifi' mag and then I had to read the full page spread a few times to realize that Dennis the menace had nothing to do with it

https://www.whathifi.com/news/australian-hi-fi-show-2023-is-coming-to-sydney-next-april



However note the date on stereonet. 1 month before the Aus-Hifi show in Sydney

There are some privileged people who now own Klippel Near Field Scanners (NFS) which is quite an expensive bit of test measurement kit and which can cost up to $100,000 depending on options. Having said that, this device can do a near field scan of a loudspeaker which is just a fancy way of accurately measuring the frequency response of a speaker without using an an-echoic chamber.. But the downside is that it can take anywhere from 12 to 16 hours (according to a recent factory tour of the Magico facility) or more to acquire all of the data and that is the price you pay for not having access to an an-echoic chamber. This begs the question as to what DEQX are actually measuring and what have they been telling people they have been measuring all of this time when they stick a microphone in front of a speaker and do a 5 second sweep and then claim to apply an inverse convolution filter to fix up both amplitude and phase issues ? The correction is only as good as the measurement right ? What is it that they are measuring and what is it they are correcting ? Does anybody know ?