Class D value for the money - 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 25th January 2012, 03:07 AM   #1
diyAudio Member
 
Join Date: Jan 2012
Default Class D value for the money

Hi guys,

Sorry to bother you with my "problem" here; I feel like doing my own customized amp; I did a bit or research and I cant't decide wich chip should I use; I don't want to spend much money, but, at the other hand, I dont want to build something not worthy.

I have this speakers:
Energy Audissey A3+2

This are the specs:
Frequency Response: (+/-3dB) 30Hz - 25kHz
Crossover Points: 1.8kHz
Room Efficiency: 91dB
Impedance: 6 ohms nominal 4 ohms minimum
Recommended Amplifier Power: (<10% Clipping) 30 - 225 watts RMS/CHNL

For what I've seen, and if I had to make a decicion without any possible help, I would go for the IRS2092 or the TK2050, but I will be open for new sugestions

I'm familiar with soldering, drilling and so on, and so on, so I don't consider myself a rookie...

Any possible help I would be much gratefull

Forgot to say that the speakers are "Bi-wire high level", so I would want to build an amp capable of delievering this

Thanks in advance,
Dave

Last edited by eispanzer; 25th January 2012 at 03:16 AM.
  Reply With Quote
Old 25th January 2012, 09:50 PM   #2
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
Visit International Rectifier Home Page - Flash Detection

They have loads of datasheets, application notes with pcb layouts that work !

I decided to go the hard route and design my own pcb's and had to go through a couple of revisions before I got it right.

The 2092 is fussy about layout, decoupling and power supplies.
__________________
PCBCAD50 software. http://www.murtonpikesystems.co.uk
  Reply With Quote
Old 26th January 2012, 07:50 PM   #3
MrSlim is offline MrSlim  Canada
diyAudio Member
 
Join Date: Jun 2009
Location: Ottawa, Ontario
Blog Entries: 2
Quote:
Originally Posted by eispanzer View Post
Hi guys,

Sorry to bother you with my "problem" here; I feel like doing my own customized amp; I did a bit or research and I cant't decide wich chip should I use; I don't want to spend much money, but, at the other hand, I dont want to build something not worthy.

I have this speakers:
Energy Audissey A3+2

This are the specs:
Frequency Response: (+/-3dB) 30Hz - 25kHz
Crossover Points: 1.8kHz
Room Efficiency: 91dB
Impedance: 6 ohms nominal 4 ohms minimum
Recommended Amplifier Power: (<10% Clipping) 30 - 225 watts RMS/CHNL

For what I've seen, and if I had to make a decicion without any possible help, I would go for the IRS2092 or the TK2050, but I will be open for new sugestions

I'm familiar with soldering, drilling and so on, and so on, so I don't consider myself a rookie...

Any possible help I would be much gratefull

Forgot to say that the speakers are "Bi-wire high level", so I would want to build an amp capable of delievering this

Thanks in advance,
Dave

I know it's somewhat less DIY to buy a prebuilt module, but these IRS2092 based modules L15D or L20D are so cheap, and many have used them successfully, that it's hardly worth the effort. Check for either of them on "The Bay"
  Reply With Quote
Old 27th January 2012, 12:15 AM   #4
diyAudio Member
 
Join Date: Jan 2012
Thank you all

So, do you think this based 2092 models are worth a try?
  Reply With Quote
Old 27th January 2012, 12:57 AM   #5
MrSlim is offline MrSlim  Canada
diyAudio Member
 
Join Date: Jun 2009
Location: Ottawa, Ontario
Blog Entries: 2
I already have a pair of L15D's that I'm waiting for a power supply for from Connexelectronix, so yes..
  Reply With Quote
Old 27th January 2012, 07:22 AM   #6
diyAudio Member
 
Join Date: Feb 2007
Location: south of germany
Hi,
I took the gerber files for IRAudamp7s from IR-site, let 4PCBs make and built it with toroids for the output filter. Sounds very good.
You can buy an exact clone of this IR reference design in the bay for around 50$.
Lately I bought L15D from the bay. It's very similar to the original, but without
protection stuff. It's fun to solder it, worked at once. Sound, power not tested yet.
I even re-designed L15Ds layout for toner transfer methode, but not tested yet.
The layout of L15D looks real good.
regards
  Reply With Quote
Old 27th January 2012, 09:55 PM   #7
diyAudio Member
 
Join Date: Jan 2012
Thanks once again guys

By the way: I just discovered the LM4780, do you think this chip amp is better than the others?

Thanks once again
  Reply With Quote
Old 28th January 2012, 12:52 AM   #8
diyAudio Member
 
Join Date: Jan 2012
I'm going for the LM4780; I just needed to know what would be best to do:

1-Balanced mode
2-Non-Inverted mode
3-Inverted mode
4-Bridged mode
5-Paralleled mode

I'm planning on using 2 chip amps (2x120W) instead of one (60W)

I would like to know as well if it is possible to add a Control volume and a line input, as I have 3 devices I'm planning to use with; And what about a speaker protection and a rectifier, do you guys think I should implement one?

Thank you once again
best regards,
Dave
  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
little money,which cdp paul.42 Digital Source 7 1st November 2011 12:14 AM
Where did all the money go? SemperFi Tubes / Valves 11 27th September 2011 06:25 PM
Best 6550's for the money.... wboyd Tubes / Valves 12 8th March 2007 01:58 PM
Any better sub for the money? derekwwww Subwoofers 31 22nd February 2005 05:29 PM


New To Site? Need Help?

All times are GMT. The time now is 02:50 AM.


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