- Welcome to Analog-Precision Board.
Taking Audio Reproduction to the Next Level.......
Recent posts
#1
News Updates / Re: Are audio shows good for t...
Last post by Tranquility Bass - September 09, 2025, 10:15:28 AMWasn't long before the meme's started popping up 
#2
News Updates / Re: Are audio shows good for t...
Last post by Tranquility Bass - September 08, 2025, 11:16:05 AMAnd a regular poster on a very well known audio forum made the following comment 
In other words, it's just a day out. It's not what exhibitors would want to hear. Priceless !!
In other words, it's just a day out. It's not what exhibitors would want to hear. Priceless !!
#3
Performance and Measurements / Re: NEW Jitter tests showing t...
Last post by Tranquility Bass - August 23, 2025, 10:01:25 AMAn excellent article
New Test Reveals How Vintage CD Players Outperform Modern Models Thanks to One Forgotten Design Choice
New Test Reveals How Vintage CD Players Outperform Modern Models Thanks to One Forgotten Design Choice
QuoteThe study shows how overlooked testing methods hid the true performance of both vintage and current models.
Lab tests have long been the final word on how CD players perform. Yet those tests rarely went beyond a few single-tone checks, leaving out the kinds of stresses that music actually creates.
Recent testing by NTTY filled in the gaps with a method that looked at clipping, distortion under load, and how digital filters behave with shaped dither. The results changed the story of how older non-oversampling and newer oversampling players really compare.
#4
News Updates / Re: Introducing the Ultimate A...
Last post by Tranquility Bass - August 13, 2025, 05:20:51 PMRather than use some obscure general-purpose mass-produced single board computer (SBC) designed for set-top box and HTPC apps (like this $79 USD VIM3L Chinese-made SBC from Khadas used in someone else's prospective DSP product**), our custom-built DSP hardware was built from the ground up specifically for hi-end audio applications, and the measurements speak for themselves. The payoff is that we fully integrate all peripherals, such as DACs, ADCs, and custom hardware, onto the same board as the DSP and using the same low-jitter clock, thereby ensuring they are tightly coupled together. Not only that, we don't rely on a third-party operating system along with all of the bloatware that comes with it, which just slows everything down; instead, we wrote all of the code from the ground up to be highly lean and efficient.
** as well as going to great lengths to hide the actual DSP/CPU used for fear of identifying this board, which kind of makes it a diyaudio project disguised in an expensive case using a similarly specced Raspberry-Pi board and thus very hard to justify the 14k USD price tag ! Tsk,tsk,tsk...not a good look for the price charged
** as well as going to great lengths to hide the actual DSP/CPU used for fear of identifying this board, which kind of makes it a diyaudio project disguised in an expensive case using a similarly specced Raspberry-Pi board and thus very hard to justify the 14k USD price tag ! Tsk,tsk,tsk...not a good look for the price charged
#5
News Updates / Re: Are audio shows good for t...
Last post by Tranquility Bass - August 10, 2025, 10:31:20 AMCase in point from a visitor to a show
#6
News Updates / Are audio shows good for the i...
Last post by Tranquility Bass - July 26, 2025, 10:09:13 AMNot according to this article
https://www.headphonesty.com/2025/07/elitism-lazy-marketing-killing-audiophile-hobby/
IMO the only benefits appear to be for the organizers who make a killing from renting out pint-sized hotel rooms with poor acoustics, and for a few days only whilst all of the exhibitors have to pay extra staff to do the heavy lifting and grunt work !! It's literally money for old rope for the organizers
https://www.headphonesty.com/2025/07/elitism-lazy-marketing-killing-audiophile-hobby/
QuoteAudio shows are everywhere now. During the first half of the year, there's one almost every month. But for at least one longtime dealer, they've become more of a drain than a strategy.
"The amount of shows is stupid and the results from shows is even stupider," he said bluntly.
To be clear, he isn't against shows completely. He's done plenty of them. But in his experience, they rarely bring in new customers or deliver truly impressive demos. Most visitors aren't there to buy. They're just passing time.
He called it "audio tourism." People poke their heads in between errands or while waiting on their partners, with no serious interest in gear. And even when they do sit down to listen, the sound usually isn't anything special.
"Most of the sound at audio shows is just average," he said. "I don't think most people go to an audio show and get their doors blown off."
Some of the industry's frustration now comes from logistics. In 2025, several major events like AXPONA, SIAV in Shanghai, and Kaohsiung Hi-End Show all happened on the same weekend. This forced brands to pick sides on where to spend money and manpower.
And that money doesn't go far. Booth costs, labor, shipping, and lodging have all gotten more expensive, yet most companies still have no clear way to track return on investment.
Even shows that report big turnouts aren't necessarily bringing in the right crowd. AXPONA 2024 hit over 10,000 visitors, but the new Gen Z ticket tier, despite some growth, still made up a small slice of attendees.
"It's the same thing over and over and over again," he said. "There's nothing unique about any of them."
He doesn't think shows need to disappear. But if the goal is to grow the customer base, this isn't the way.
IMO the only benefits appear to be for the organizers who make a killing from renting out pint-sized hotel rooms with poor acoustics, and for a few days only whilst all of the exhibitors have to pay extra staff to do the heavy lifting and grunt work !! It's literally money for old rope for the organizers
#7
News Updates / Re: Introducing the Ultimate A...
Last post by Tranquility Bass - July 25, 2025, 06:32:48 PMWe must have redesigned this Active Speaker Integrated Controller (ASIC) sub-system at least a hundred times with many major and minor changes along the way. Whilst doing so, we have come up with numerous breakthroughs designed at perfecting loudspeaker reproduction. Some are even worth patenting ! These are not useless things like using bits of expensive speaker wire, expensive mains cables, milling out expensive bits of metal or changing out DAC's etc. These are things that make real-world differences in addressing the flaws in current loudspeaker technology ! This is only possible when you have total control over all facets of the design process.
#8
News Updates / How to build a linear-phase cr...
Last post by Tranquility Bass - July 17, 2025, 07:00:10 PMUsing Audioweaver, the Ultimate Preamplifier, and rePhase, we were able to implement a linear-phase crossover on the onboard SHARC DSP running at 192 kHz without much effort at all. For this example, we chose a simple 2-way crossover centered at 1 kHz and a response that mimicked an 8th-order Linkwitz-Riley filter, in which both sections exhibited an in-phase response of -6 dB at the crossover point.
To see the whole article please login or sign-up and click here.
To see the whole article please login or sign-up and click here.
#9
Crown Prince (PCL-1000) / Re: Model Information
Last post by dtximages - May 25, 2025, 11:01:13 AMHey I'm interested in your thoughts on this speaker. I just picked up a pair and found them VERY lacking in the bass region. Drivers all all moving but I feel there should be more on the bottom end. My Crown Princes don't hardly need a subwoofer, but the Prince sounds is nothing like that.
Could I need a woofer replacement? If so which ones?
Could the crossover be bad? How do I figure that out.
60hz and up, they sound AMAZING like all Duntechs but gosh this whimpy bass is giving me fits.
Could I need a woofer replacement? If so which ones?
Could the crossover be bad? How do I figure that out.
60hz and up, they sound AMAZING like all Duntechs but gosh this whimpy bass is giving me fits.
#10
FIR filter designs / Re: Group-delay correction of ...
Last post by Tranquility Bass - May 04, 2025, 02:21:59 PMFor those who have asked me whether this type of phase correction filter can be implemented on the SHARC DSP in our preamp then lets take a look if it is possible.
Firstly, we will have to throttle back the sampling rate to 48kHz to get close to the ball-park and that's assuming we want to run two stereo channels on the one DSP. Unlike the PC example above we don't really have an infinite amount of resources to play with. This can be done by selecting the base sampling rate for the board of 48 kHz by setting the appropriate DIP switches. To find out how to do this refer to the following application note on our forum https://analog-precision.com/forum/wiki-and-qa/how-to-change-the-native-sample-rate-of-the-preamp/
The theoretical maximum number of taps for the SHARC running at 392 MHz on our board is 786.432 MMACS divided by 48 kHz, which is 16384 taps for both channels running. This limits it to 8192 taps per channel which is the maximum theoretical limit. Of course, we don't want to aim for the maximum number of taps otherwise there won't be enough DSP capacity to run other tasks like the Preamp and the LR crossover filter itself.
Let's bring up Rephase, our trusty freeware FIR filter calculator, and have a play around. Let's try 2048 taps for starters. As one can see below there is too much amplitude and phase deviation in the lower frequencies so this FIR filter is inadequate.
Let's double the tap count to 4096 taps per channel. We get better phase matching but still a lot of amplitude deviation in the lower frequencies.
At 6144 taps, things look much better which gives us some spare DSP capacity for other tasks such as the LR crossover itself
Of course, if you are running only one DSP module per speaker, then there is the potential to double the tap count or sampling rate. But bear in mind that each doubling of the sample rate requires twice the number of taps to yield the exact frequency resolution, which in turn requires 4 times the DSP capability, which is why we had to throttle the DSP back down to 48 kHz but is still now well within the Preamps' capability for the stereo version.
Firstly, we will have to throttle back the sampling rate to 48kHz to get close to the ball-park and that's assuming we want to run two stereo channels on the one DSP. Unlike the PC example above we don't really have an infinite amount of resources to play with. This can be done by selecting the base sampling rate for the board of 48 kHz by setting the appropriate DIP switches. To find out how to do this refer to the following application note on our forum https://analog-precision.com/forum/wiki-and-qa/how-to-change-the-native-sample-rate-of-the-preamp/
The theoretical maximum number of taps for the SHARC running at 392 MHz on our board is 786.432 MMACS divided by 48 kHz, which is 16384 taps for both channels running. This limits it to 8192 taps per channel which is the maximum theoretical limit. Of course, we don't want to aim for the maximum number of taps otherwise there won't be enough DSP capacity to run other tasks like the Preamp and the LR crossover filter itself.
Let's bring up Rephase, our trusty freeware FIR filter calculator, and have a play around. Let's try 2048 taps for starters. As one can see below there is too much amplitude and phase deviation in the lower frequencies so this FIR filter is inadequate.
Let's double the tap count to 4096 taps per channel. We get better phase matching but still a lot of amplitude deviation in the lower frequencies.
At 6144 taps, things look much better which gives us some spare DSP capacity for other tasks such as the LR crossover itself
Of course, if you are running only one DSP module per speaker, then there is the potential to double the tap count or sampling rate. But bear in mind that each doubling of the sample rate requires twice the number of taps to yield the exact frequency resolution, which in turn requires 4 times the DSP capability, which is why we had to throttle the DSP back down to 48 kHz but is still now well within the Preamps' capability for the stereo version.