Recent Posts

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91
Your Active Speaker Designs / Re: 3 way with hypex SB acoustics and peerless
« Last post by MichaelH on February 02, 2021, 02:00:14 AM »
Excellent job there Yoke. Nothing like doing it yourself better than the big names can do it.
92
Your Active Speaker Designs / 4 way active
« Last post by MichaelH on January 31, 2021, 11:37:37 AM »
My 4 way active.

1st order xover.

Analog Precision 8 channel amplifier.

Without doubt the best sound I have heard. Superb midrange like you have never heard.



93
Your Active Speaker Designs / Re: 3 way with hypex SB acoustics and peerless
« Last post by yoke on January 30, 2021, 06:59:21 PM »
And here is how I setup Linkwitz transform for Peerless XLS 10

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Your Active Speaker Designs / Re: 3 way with hypex SB acoustics and peerless
« Last post by yoke on January 30, 2021, 06:57:11 PM »
Second set
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Your Active Speaker Designs / 3 way with hypex SB acoustics and peerless
« Last post by yoke on January 30, 2021, 06:55:31 PM »
Hi all
this is my system based on rPi3 (volumio) > Analog Precision DSP first generation with ES9028 > hypex NC252MP for peerless XLS10 / hypex NC250MP for Satori 16P / NC100HF for Satori BE

The sound is great !!!

Crossover points are like 100-120Hz LR4 betwin XLS and 16P and 2400Hz LR2 betwin 16P and BE.
There is Linkwitz transform on XLS10 and that's all, just a plain LR4 and 2LR.

And a couple pictures of building process.


96
Ultimate-Preamplifier by Analog-Precision / Re: Please Read !
« Last post by Tranquility Bass on January 25, 2021, 08:25:33 AM »
While I am intrigued by the Ultimate Preamplifier, at least for me, some of the use-cases for it are unclear.
For example - what is the easiest way to create a crossover using the UP? I know DEQX has a simple process that is using a mic and does its magic automatically.
How easy is it to create a correct, good sounding crossover? I am looking to replace my NHT XDA amp with the Ultimate Preamp + multi-channel amp.

Well - nothing like reading the manual  ;D
The manual directs you to download sample 2,3 or 4 way crossover templates from the download section. In other words, it is next to trivial to implement a xover with Audio Weaver + Ultimate Preamp.

Most people will use the available templates from our downloads page https://analog-precision.com/downloads/  and modify them for their own use case.

DEQX is truly a lightweight DSP platform compared to the UP whiuch uses a 4th generation SHARC DSP chip. By comparison DEQX uses a first generation SHARC DSP from Analog Devices and needs two of them just to process at 96kHz ! Their hardware design hasn't changed in decades and is hamstrung by legacy code. See here for a direct comparison with the UP https://analog-precision.com/home/pcg/

regards
David
97
Ultimate-Preamplifier by Analog-Precision / Re: Please Read !
« Last post by Boerd on January 24, 2021, 11:49:40 PM »
While I am intrigued by the Ultimate Preamplifier, at least for me, some of the use-cases for it are unclear.
For example - what is the easiest way to create a crossover using the UP? I know DEQX has a simple process that is using a mic and does its magic automatically.
How easy is it to create a correct, good sounding crossover? I am looking to replace my NHT XDA amp with the Ultimate Preamp + multi-channel amp.

Well - nothing like reading the manual  ;D
The manual directs you to download sample 2,3 or 4 way crossover templates from the download section. In other words, it is next to trivial to implement a xover with Audio Weaver + Ultimate Preamp.
98
Ultimate-Preamplifier by Analog-Precision / Re: Please Read !
« Last post by Boerd on January 21, 2021, 10:43:25 PM »
While I am intrigued by the Ultimate Preamplifier, at least for me, some of the use-cases for it are unclear.
For example - what is the easiest way to create a crossover using the UP? I know DEQX has a simple process that is using a mic and does its magic automatically.
How easy is it to create a correct, good sounding crossover? I am looking to replace my NHT XDA amp with the Ultimate Preamp + multi-channel amp.
99
In this test we increased the analyzer bandwidth to 80 kHz and increased the sampling rate from 48kHz to 192kHz to view the ultrasonic spectrum above the audio bandwidth just to see if there was any surprises. As can be seen from the spectrum below it is fairly clean with some artifacts centered at 55kHz at extremely low level of around -120dB which could be some slight peaking in the IV circuit so nothing to be worried about because it is at such low level and outside the audible bandwidth. Running a simulator on the implimentation of the IV converter suggest no peaking at all so something else at play because the actual peaking is dependent on audio level. Further thoughts are that the peaking may be some beating with the on-board switching regulator but at 120dB down we have done a pretty good job at suppressing it. The broad peaking indicates some spread spectrum which is typical of a switching regulator that continuously regulates itself by varying it's pulse width.

100
Minimal overshoot and ringing with a well defined transition period !



Expanded scale with equivalent time sampling rate of 100 Gs/s !

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