Need Advice from Amp Gurus - diyAudio
Go Back   Home > Forums > Amplifiers > Class D
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

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 Search this Thread
Old 24th July 2008, 01:00 PM   #1
Juke425 is offline Juke425  United States
diyAudio Member
Join Date: Jul 2008
Default Need Advice from Amp Gurus


I'm looking for some help/advice from the DIY community as for what you think a good amp would be for a small professional wall mount jukebox.

I have experimented with several of the Lepai amps which use various chips including the Tripath. I know these are pretty low on the quality chart and low wattage which is probably why anytime I get past 1/4 of the volume they start to distort. I have also tried various 12V car audio amps and they sound pretty good, but it feels like I need a little more power (volume) then they can provide. The car audio stuff is also usually a little too big to fit inside the unit. Tried the Pioneer 3300T (300watt two channel) as a test. Besides it being too large in physical size, I felt it was a little weak on the volume too.

Here is what I'm trying to accomplish....

I have a pretty small space to work with - 10.5" W x 5.5" H and 3" thick.

Looking for a two channel 8ohm amp with a clean HIFI sound and solid volume.

It would be nice to run the amp off the 12V line from the PC power supply but this requirement can change to 110V if more power was needed. The current PC power supply has two 12volt rails 19amps each. The computer uses about 12-14amps.

And of course budget has to get in the way. Trying to accomplish this for under $150 per unit.

This product would be produced in qty.

Hopefully my requirements aren't too far out in left field and maybe someone here who has a lot more experience with this stuff can suggest some options.

This might also be an opportunity for someone here who is willing to manufacture a custom amp for us? Open to suggestions.

Thanks in Advance
  Reply With Quote
Old 24th July 2008, 11:58 PM   #2
TheMG is offline TheMG  Canada
diyAudio Member
Join Date: Jan 2008
If it wasn't for the tight budget I'd recommend the Hypex UCD180 modules. It has the quality, small size, and power you're looking for but it might be a little on the expensive side.

Granted, I don't know what Hypex's bulk OEM pricing is like. Might want to contact them, you never know what you'll find.

Only other thing is it will require it's own power supply, it will not work off the PC power supply.
  Reply With Quote
Old 25th July 2008, 01:35 AM   #3
Eva is offline Eva  Spain
diyAudio Member
Eva's Avatar
Join Date: Oct 2003
Location: Near the sea
Send a message via MSN to Eva
Check this out and mail me if you want to know further. This amplifier may be modified for up to 2x200W on 8 ohms output without altering size. In comparison, the Pioneer unit would only produce 40W on 8 ohms at best.

Cool and small 2x150W class D full-range car amplifier
I use to feel like the small child in The Emperor's New Clothes tale
  Reply With Quote
Old 25th July 2008, 03:46 AM   #4
diyAudio Member
Join Date: Apr 2007
Location: Denver, CO
If you're wanting high quality and high power, you won't want to run from a PC power supply. First, these are switchmode power supplies that introduce noise into the signal that a good linear supply won't. Second, the best you're going to get from a PC power supply is +/- 12V, which isn't a lot of voltage swing, so this will limit the power.

I think you'll have to use a regulated supply to accomplish what you want.
  Reply With Quote
Old 27th July 2008, 08:55 PM   #5
Juke425 is offline Juke425  United States
diyAudio Member
Join Date: Jul 2008
Default Thank You!

Thanks for the suggestions guys!! I will look into those options.
  Reply With Quote
Old 28th July 2008, 03:20 AM   #6
Juke425 is offline Juke425  United States
diyAudio Member
Join Date: Jul 2008
I'm looking at the UCD180 OEM and looks to be a nice option. I'm wondering what the difference is between the following inputs and which one you would use for audio coming from a Computer LineOut

Unbuffered Non-Inverting Audio Input
Buffered Non-Invertising Audio Input
Buffered Inverting audio input
unbuffered inverting audio input

Tried WIKI and doesn't seen to be much info on this subject.

Eva, I can't send you a message because my account is still under moderation, but I am interested in hearing more about your amp. Can you please message me with your email addy and well chat.
  Reply With Quote


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
Need advice from the analog gurus davidlzimmer Analogue Source 21 23rd July 2007 11:23 AM
Questions for the Class A gurus! Need advice DIY_newbie Pass Labs 12 5th October 2005 10:04 PM
Need the gurus advice on sub undertoe Multi-Way 18 16th December 2003 12:05 AM

New To Site? Need Help?

All times are GMT. The time now is 02:49 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2