Any reliable DIY kits good for a REAL 150-200W into 8ohms? - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

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
Reply
 
Thread Tools Search this Thread
Old 14th June 2012, 06:49 AM   #1
diyAudio Member
 
speakrsrfun's Avatar
 
Join Date: May 2005
Location: Toronto
Default Any reliable DIY kits good for a REAL 150-200W into 8ohms?

Like the title says I need a reliable and real 150-200W/channel into 8 ohms class D amp. The ones I've looked at from hifimediy.com, ClassDaudio.com(quite pricey) and the L20D IRS 2090 and the like all state this output but how realistic is it and how reliable are these units in general. I need cheap amplification for an active system and need these questions answered honestly, along with any other suggestions for other reliable resources available. Being that SMPS are fairly cheap when purchased with standard voltages I'd like to stick with something that is capable of running from the available off the shelf units. This puts a damper on units like the L-20D as required PS for this to get 200-250 stated watts is a 70V supply.... Most SMPS are good to 48V from what I've seen. Anyway any suggestions would be welcomed and appreciated.
__________________
What was that?... I can't hear you I have a line array filling my ears.
  Reply With Quote
Old 14th June 2012, 11:29 AM   #2
diyAudio Member
 
Mark.Clappers's Avatar
 
Join Date: Jan 2010
Location: The Netherlands, near the German border
Take a look at Hypex: https://www.hypexshop.com/

I use them in my active setup and like it a lot. Trinium, my latest build
__________________
Music is art - Audio is psychoacoustics & engineering
  Reply With Quote
Old 14th June 2012, 12:37 PM   #3
gmarsh is offline gmarsh  Canada
diyAudio Member
 
gmarsh's Avatar
 
Join Date: Apr 2004
Location: Halifax, NS, Canada
The voltage of your power supply will set an upper limit on your power. If you're running from a single +48V supply, a BTL amplifier will only give you a theoretical 140 watts sine (and practically, a fair bit less, maybe 120W sine) and few companies make BTL amplifiers anyway.

I'd say get a SMPS designed for audio, like this guy, and pair it with whatever amplifier you choose: Connexelectronic

IRS2090 amplifiers are great for 'brute force' power for things like PA systems. My only issue with them is they (in every case I've seen) use output stage feedback instead of post-filter feedback - this means that the amplifier output filter has to be different for use with 4 ohm or 8 ohm speakers, and using the wrong impedance speaker can cause dullness/brightness. Not an insurmountable problem, mind you - you can tweak the mismatch out with equalization.

The Hypex modules mentioned use post-filter feedback, meaning they don't have the load sensitivity issue. I also consider them to be pretty much the best class D amplifiers on the planet. But you pay for that.
  Reply With Quote
Old 14th June 2012, 06:30 PM   #4
diyAudio Member
 
Join Date: Feb 2012
The L25D is 250W RMS in to 8 Ohms, look at that model. Even though I would never operate there all the time, the L25 has dual output fets, instead of one in the L15 and L20

Using my common sense, an L25 operated less than 200W during its life should last longer than a L20 at 200W??? I have seen many threads about the operational temperatures of the L20/L25's being kind of high. The designers says its ok and normal.

Yes, I would use a SMPS from Connex, they would be my first choice for SMPS retailers. They offer +/- 72VDC SMPS which are perfect for L20-L25's. Or go linear PS

Last edited by NissanSR20Man; 14th June 2012 at 06:32 PM.
  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 8ohms speakers in paralel to 8ohms crossover? taller4 Construction Tips 2 19th June 2011 12:01 PM
Need high quality 200w/Ch. @ 8ohms stereo amp Thabto Solid State 3 10th February 2011 07:25 AM
CHIP AMP kits, transformers , chips , + good misc DIY parts cdoggy81 Swap Meet 18 19th February 2009 02:00 AM
Is This A Good Reliable Tube Tester? 65blkbkgt Tubes / Valves 11 7th January 2008 06:46 PM


New To Site? Need Help?

All times are GMT. The time now is 02:48 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2