Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 23rd August 2011, 05:44 AM   #21
diyAudio Member
 
Join Date: Aug 2008
The main document never does specify what the exact use is. Since I most likley won't have the volume past 50% 2.2uF would give me around 100ms for the input. 22uf as said also gives me aorund 100ms at the output...

With active filtering can the passive filters be eliminated? Thanks for the education on how this better works. All caps are going to be poly film and resistors metal oxide 1%

In my version I removed the Q/Boost and the 4th order. I have 2 saleen key butterworth's. 40HZ High Pass and Variable Low Pass being fed into the phase adjustment. Any other recomended tips or tweaks? I am going to have a PCB made so I want to make sure I iron out all the "bugs".

This pre-amp is going to be installed into a Klipsch dual 6" sub using the stock class G? amplifier. The input is going to be from the LFE output on my Yamaha 6.1 RX. The sub has very good sound from about 35-180HZ. Insted of trash I decided to DIY it into a small HT sub and learn a few things on the way.

The 5 3ohm stable 160W A/B amp boards inside also make for a nice 5.1 AMP but thats the next project.
  Reply With Quote
Old 27th August 2011, 10:57 AM   #22
diyAudio Member
 
Join Date: Aug 2008
Almost done with the pcb it should be completed tonight.
  Reply With Quote
Old 28th August 2011, 05:21 AM   #23
diyAudio Member
 
Join Date: Aug 2008
Here is what I have for the PCB
Click the image to open in full size.
The left side is the mains input. The center is the voltage regs for the amps and preamp. The right side is the audio filter.

Please have a look and comment. All connections are matched to the origional design to make it plug and play friendly. It is very similar to the origional PCB with the only differences being the fuse is going to be external and the filter is for the subwoofer only. The power plug was hard wired. I opted to use a switched and fused 3-prong socket to make it more like a standard sub.

I am still unsure that I am using the best filter design so please comment on that also. AndrewT pointed out some design issues that I have worked on but if there is a better proved design I can easily update the schematic and board.

The input voltage is +-33V from the SMPS. The regulated volatges are +-15V and + 20V
The amp voltage is variable 0-60V and controlled by the BASH circiut using amp level feedback.
The amp is a linear full bridge I believe in class A/B with an opamp feedback to the power supply which runs in class D or G?

Thanks for all the help. This has been a very fun project so far.

Last edited by crazifunguy; 28th August 2011 at 05:31 AM.
  Reply With Quote
Old 7th December 2012, 08:57 PM   #24
diyAudio Member
 
Join Date: Dec 2012
Location: Edmonton
Its been over a year since the last post - that being said I realise I might not get a reply: did you end up building your schematic? And did it work? The reason I ask is that i'd like to do the same as you, crazifunguy, and ditch the klipsch 4.1 control pod.

Last edited by thejerrod; 7th December 2012 at 09:14 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
Any information and schematic about diy Pass Lab XA 200 power amp and X 0.2 pre amp? jelou Pass Labs 17 4th December 2011 10:56 PM
diy microphone pre-amp sadim1223 Parts 11 13th March 2009 04:30 PM
Diy bass pre amp? guitar_joe Instruments and Amps 2 1st September 2007 01:00 AM
Recommended diy Pre for T-amp t. Class D 12 21st June 2005 09:56 AM


New To Site? Need Help?

All times are GMT. The time now is 07:06 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