Go Back   Home > Forums > >

Equipment & Tools From test equipment to hand tools

Audio Precision System Parts & Service
Audio Precision System Parts & Service
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools
Old 6th April 2016, 09:39 PM   #1
Audio1Man is offline Audio1Man  United States
diyAudio Member
Join Date: Feb 2010
Location: Thousand Oaks, CA.
Smile Audio Precision System Parts & Service

Hi All

I just purchased a 20K Brick Wall filter card that is used in AP System One, Two & Cascade from Mr Ultranalog. The preformance is stellar, like the orignal AP and much less costly. He also has some others filters.

I do a lot of AP repairs and this makes is easy on my customers. I hope this may help some of you.

  Reply With Quote
Old 7th April 2016, 05:28 AM   #2
ultranalog is offline ultranalog  Poland
diyAudio Member
Join Date: May 2001
Location: It's only Audio corporate HQ, Warsaw, Poland
Send a message via AIM to ultranalog Send a message via Yahoo to ultranalog
Wow. Thank you Duke. Coming from an former AP authority like you, that is high praise indeed.

Yes, the project was in stealth mode but it's true, for all DAC and class-D freaks out there, I recreated the 20kHz low-pass measurement filter as a scratch-an-itch kind of solution. With it, you can run AES17 measurements even with a System One, which was built and sold well before the standard came into effect.
By using AES17, you can not only post better THD+N numbers, but also better find distortion in the audio band without being dwarfed by out of band (e.g. modulation) energy.

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

More info here

With all the high precision components and calibration on the board, I'm thinking about EU 129 retail including 23% VAT. However if I get enough interest from the DIYaudio community (20+) I'll commit to EU 99. As I'm doing hand-built production runs, that is just about covering components, time and the tax man.
Production run boards should be available about 4 weeks from green light. Shipping at cost at buyer's expense.

As Duke mentioned, I have designs for several other filter plugins, including AWT, CWT, D75R (reverse RIAA) and others as well that I'll publish when I have first runs built and testing procedures in place. Feel free to inquire though.

Oh, and hey DIYaudio. It's been a while.

- Remco.
  Reply to this post


Audio Precision System Parts & ServiceHide this!Advertise here!
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Audio Precision System One woes Loudthud Equipment & Tools 18 27th March 2015 03:08 PM
Audio Precision System One GPIB & PCMCIA ChristianThomas Swap Meet 6 16th June 2013 06:42 PM
Audio Precision System 1 mickeymoose Swap Meet 4 23rd April 2010 06:47 PM
Audio Precision System 1 users? jan.didden Class D 12 28th December 2006 07:15 PM
Audio Precision System One 02G Michael Rothacher Swap Meet 0 22nd November 2002 03:17 AM

New To Site? Need Help?

All times are GMT. The time now is 11:54 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio