Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Vendor's Bazaar Commercial Vendors large & small hawking their wares

Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
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
Reply
 
Thread Tools Search this Thread
Old 14th January 2018, 10:05 PM   #1001
Luca72c is offline Luca72c
diyAudio Member
 
Join Date: Sep 2013
For what i understand about this dsp/dac/preamp, it's an unbelievable bargain! Sure i'll get one as soon as i have enough money! It's hard to believe that price could be lowered, even with mass production...
Anyway, are onboard opamp replaceable for opamp rolling?
If they aren't, could a customer request dip sockets onboard instead of opamps?
  Reply With Quote
Old 25th January 2018, 10:38 PM   #1002
etlasr is offline etlasr
diyAudio Member
 
Join Date: Jun 2012
Default performance measurements

Quote:
Originally Posted by LeRouge View Post
I possibly missed this along this thread, but some measurements have been taken? (distorsions, THD+N vs frequency, noise floor, balanced frequency response (in path-through mode), etc ?)
Would also like to know these in part because they are (to me anyway) essential to know before buying and also to see how well they compare to a high quality analogue active crossover.
  Reply With Quote
Old 26th January 2018, 10:56 PM   #1003
Tranquility Bass is offline Tranquility Bass  Australia
diyAudio Member
 
Tranquility Bass's Avatar
 
Join Date: Jun 2013
Location: Australia
Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
Have done some preliminary measurements through an EMU0404 external USB sound card and the measurements look very favourable. Until I get some well specced and calibrated test and measurement equipment there's probably not much point in publishing the results as you don't know how much you are measuring is the DUT and how much is the imperfection of the measurement device.

cheers
  Reply With Quote
Old 26th January 2018, 10:57 PM   #1004
Tranquility Bass is offline Tranquility Bass  Australia
diyAudio Member
 
Tranquility Bass's Avatar
 
Join Date: Jun 2013
Location: Australia
Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
Quote:
Originally Posted by Luca72c View Post
For what i understand about this dsp/dac/preamp, it's an unbelievable bargain! Sure i'll get one as soon as i have enough money! It's hard to believe that price could be lowered, even with mass production...
Anyway, are onboard opamp replaceable for opamp rolling?
If they aren't, could a customer request dip sockets onboard instead of opamps?
There's two problems with that idea. Firstly there is not enough board space to incorporate DIP sockets and secondly different opamps require different compensation schemes.

cheers
  Reply With Quote
Old 2nd February 2018, 01:06 AM   #1005
Tranquility Bass is offline Tranquility Bass  Australia
diyAudio Member
 
Tranquility Bass's Avatar
 
Join Date: Jun 2013
Location: Australia
Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
Managed to fix up some driver issues with my E-MU 0404 sound card and downloaded the latest trial version of Spectra Plus. Here are some distortion and noise measurements. The crusty bits in the HF spectra on one channel(top trace) is from the sound card because when I swap outputs it still remains on the same channel. The source generator is a precision 32 bit sinewave generator built into the Ultimate-Preamp. Note that these are not measurements that are done on a reference grade calibrated measuring instrument.

Distortion and Noise at 50Hz:

DistortionTest@50Hz-20dBfs.png

Distortion and Noise at 1kHz:

DistortionTest@1KHz-20dBfs.png

Distortion and Noise at 10kHz:

DistortionTest@10KHz-20dBfs.png

Last edited by Tranquility Bass; 2nd February 2018 at 01:18 AM.
  Reply With Quote
Old 2nd February 2018, 01:41 AM   #1006
125dbmonster is offline 125dbmonster  Australia
diyAudio Member
 
125dbmonster's Avatar
 
Join Date: Feb 2015
Location: Anywhere, but like Tasmania
Looking good there David, thrilled that it's heading my way soon !!
  Reply With Quote
Old 3rd February 2018, 11:49 PM   #1007
soundchaser001 is offline soundchaser001  Canada
diyAudio Member
 
soundchaser001's Avatar
 
Join Date: Oct 2007
Location: Kanata
Just ordered a full up variant (my retirement present).

Soooo looking forward to its arrival.

Took a while to get my head around digitizing EVERYTHING (even vinyl playback) but i figured that the virtues of this device and design far outweigh any perceived drawbacks (and they are really just prejudices on my part).

It will be driving six channels of Tom Christiansen's MODULUS 86 which is built and working with very pleasing results.

As the snow boarder's say..."totally stoked".

Matt
  Reply With Quote
Old 7th February 2018, 03:27 AM   #1008
69hotrod is offline 69hotrod
diyAudio Member
 
Join Date: Feb 2015
How did you place order when online shop is showing analog and digital boards as out of stock? Any idea of restock timeline.Is online shop correct.
  Reply With Quote
Old 7th February 2018, 05:52 AM   #1009
Tranquility Bass is offline Tranquility Bass  Australia
diyAudio Member
 
Tranquility Bass's Avatar
 
Join Date: Jun 2013
Location: Australia
Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project
Yes the online shop is correct. Most of the small initial production run of pre-assembled Preamps have been sent out to customers and the feedback has been very encouraging to say the least. We are now working on producing the next batch of preamps with the focus on streamlining the manufacturing process with less manual intervention now that the design has been proved.

We'll be making an announcement in March as to our plans and stock availability. Thanks for your patience.
  Reply With Quote
Old 7th February 2018, 12:54 PM   #1010
NATDBERG is offline NATDBERG  United Kingdom
diyAudio Member
 
Join Date: Nov 2006
I'll start saving this month then....
  Reply With Quote

Reply


Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC projectHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Full Digital / CrossOver / Multi Amplifier integrated KOON3876 Class D 71 21st November 2014 11:56 AM
Multi channel Linux audio player with integrated amplifier questions. ollepetersson PC Based 5 17th March 2013 02:46 PM
Multi purpose multi channel gainclone PCB: Team project - group buy rick57 Chip Amps 14 29th March 2003 05:54 PM


New To Site? Need Help?

All times are GMT. The time now is 05:44 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki