Go Back   Home > Forums > Commercial Sector > Manufacturers > miniDSP

miniDSP Low cost, modular Digital Signal Processor (DSP) kits for the DIYer from miniDSP.

Reply
 
Thread Tools Search this Thread
Old 1st September 2011, 07:45 PM   #11
hm4nine is offline hm4nine  Europe
diyAudio Member
 
Join Date: Mar 2005
No reaction to my intentions/wishes?
Besides this - let me report some experiences:
A friend-of-mine owns the 2x8-kit. To evaluate the sonic differences he compared it with his actual equipement – say, he incorporated the kit into his preamp/poweramp audio chain.
And yes, - as awaited - he could hear a slightly negative difference when using no filters etc., just in the linear frequency mode.
But – and itīs a big BUT: having equalized audible abberations like room/speaker anomalities the result was really, really positive.
Now I think: how about to optimize the kit, e.g with the supplies? Donīt forget: here we are in a DIY-forum! Supplies cost money, and I understand that manufactures want to get the most profit. Thatīs business world....
Therefore my suggestions are: miniDSP should think about how trained DIY-technicians can improve their kit (probably with lots of their own money) – and of course: loosing warranty.
Nevertheless: miniDSP-products seem to be a great value-for-money!!
  Reply With Quote
Old 2nd September 2011, 07:48 AM   #12
minidsp is offline minidsp  Hong Kong
diyAudio Member
 
minidsp's Avatar
 
Join Date: Dec 2009
@hm4nine,

Thanks for your comments and sharing your feedback, we're glad to hear of the successful implementation of your friend!

The miniDSP 2x4 unbalanced doesn't have any op amps so that simplifies things up.. :-)
The miniDSP 2x4 balanced uses a low noise LDO instead of a switcher for all op amp supplies.
The miniDSP 2x8 does generate +/-15V from a switching supplies and indeed could be replaced by a linear supply if needed. There are actually a lot of DIYers out there tweaking our boards and I'm sure that we only know 1/10th of it.. :-) However we don't really want to get into documenting too much else we'd turn ourselves into an electronic design support office. Having to explain what's a PEQ and how to use a DSP is already a substantial task to keep up and the more questions we get (especially out of the use of the product), the higher the tech support requirements, the more expensive we'll have to sell the board. If you have some electronic knowledge, a scope and able to read some test points, there is certainly a lot of good things that can be done!

Hope this clarifies

DevTeam
__________________
www.minidsp.com - Low cost & modular audio DSP kits for DIYers - Follow our tweets @ minidsp
  Reply With Quote
Old 21st September 2011, 03:22 AM   #13
diyAudio Member
 
Join Date: Feb 2009
Location: Brisbane, Australia
Quote:
Originally Posted by minidsp View Post
The miniDSP 2x4 balanced uses a low noise LDO instead of a switcher for all op amp supplies.
Hopefully you don't mind me adding my question to this thread.

With the 2x4 balanced board what is the minimum operating voltage recommended? Is there any issues if the voltage dips below 12V?
  Reply With Quote
Old 8th November 2011, 12:45 PM   #14
Cyan is offline Cyan  Italy
diyAudio Member
 
Join Date: Oct 2008
I've already asked this on the minidsp official forum, but I'll ask here too, since there are many experts.
I have noticed a general worsening of the sound quality by putting the minidsp between dac and speaker amp. Ofc it also brought a big improvement, by allowing me to better integrate the speakers with the subwoofer, but I feel the sound is dirtier, noisier with the usb power. I would therefore like to try with a cheap but decent quality psu.
How about this one? EU 5V DC 2A High Quality regulated power supply adapter 2.5x5.5mm | eBay
Ofc I have to cut the tip of the cable, to fit it in the phoenix connector, but do you know how I can find which is the + and which is the -?
You also said there is no difference with psu voltage, but do you suggest me the one I linked over, to this one EU 12V 1A regulated power Supply adapter high quality | eBay ?
  Reply With Quote
Old 8th November 2011, 04:11 PM   #15
Frosteh is offline Frosteh  United States
diyAudio Member
 
Frosteh's Avatar
 
Join Date: May 2011
Location: Kirkland, WA
Quote:
Originally Posted by Cyan View Post
I've already asked this on the minidsp official forum, but I'll ask here too, since there are many experts.
I have noticed a general worsening of the sound quality by putting the minidsp between dac and speaker amp. Ofc it also brought a big improvement, by allowing me to better integrate the speakers with the subwoofer, but I feel the sound is dirtier, noisier with the usb power. I would therefore like to try with a cheap but decent quality psu.
How about this one? EU 5V DC 2A High Quality regulated power supply adapter 2.5x5.5mm | eBay
Ofc I have to cut the tip of the cable, to fit it in the phoenix connector, but do you know how I can find which is the + and which is the -?
You also said there is no difference with psu voltage, but do you suggest me the one I linked over, to this one EU 12V 1A regulated power Supply adapter high quality | eBay ?
I'm using this (Astrodyne 20W 5V Compact Switching Power Supply | eBay). It sounds great.
  Reply With Quote
Old 8th November 2011, 04:27 PM   #16
Cyan is offline Cyan  Italy
diyAudio Member
 
Join Date: Oct 2008
Quote:
Originally Posted by Frosteh View Post
Unfortunately it's not in a case . Do you hear differences between this and usb power?
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2 2x4 or 1 2x8 MiniDSP Frosteh Digital Line Level 6 23rd August 2011 12:25 PM
2x4 in Box with 24/96 or 24/196 aazeez1975 miniDSP 3 8th July 2011 10:40 AM
2x4 brace matrix curiousburke Subwoofers 3 7th December 2007 02:40 PM
Optimal ripple voltage on b+ supply nhuwar Tubes / Valves 14 1st February 2007 05:01 PM
Math to calc optimal voltage of tube dac to match amp input sensitivity? riotubes Tubes / Valves 7 9th November 2006 11:08 PM


New To Site? Need Help?

All times are GMT. The time now is 10:06 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright Đ1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2