increasing power of Focal car amplifier - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 18th June 2012, 02:00 PM   #1
diyAudio Member
 
Join Date: Jul 2010
Default increasing power of Focal car amplifier

hi.
I have a focal 4.75 car amplifier its a nice sounding 75 watt per channel amplifier.

Output devices TIP35/36C pair. Driver stage TIP 102/107.

Now i have made a separate power supply, 12v to +/- 40 Volts at 250 KHZ switching using 15 75N75 devices. its approxiVmately 1200W supply.


Now how can i use TIP 35/36C pair to drive 10 pairs of Parallel 2SC5200/SA4913 high biased to get around 150 W Class A to drive fronts of my car audio.

Using 10 pairs each device would be biased to dissipate around 30W.

Any schematic how to get drive signal from emitters of the output stage of the amplifier,

1. I assume i have to disconnect the emitters to ground and insert a 5K resistor to ground (to complete feed back path with additional 5k feed back resitance)

2. I then intend to bias the 5200/4913 pair with IC=2 Ampere ? any suggestions here ??? the load is 4 ohm, what should be the emitter resistior value and what should be the base resistor value for each device. ?

Thanks
  Reply With Quote
Old 18th June 2012, 04:45 PM   #2
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
Before make such a mod, buy a good battery charger, and replace the alternator with one for an aeroplane.
__________________
LW1DSE
  Reply With Quote
Old 18th June 2012, 08:18 PM   #3
diyAudio Member
 
theAnonymous1's Avatar
 
Join Date: Feb 2004
Location: Anonymityville
150W Class-A per channel? That's >600W of constant power draw from the electrical system.... good luck with that.
  Reply With Quote
Old 19th June 2012, 03:18 AM   #4
JLH is offline JLH  United States
diyAudio Member
 
JLH's Avatar
 
Join Date: Apr 2005
Location: Indianapolis, IN
Quote:
Originally Posted by theAnonymous1 View Post
150W Class-A per channel? That's >600W of constant power draw from the electrical system.... good luck with that.
Not to mention it will make for a very big space heater. I hope you have good air conditioning.
__________________
Ah, how beautifully the orchestra sounds before a rain! In a dry sunny day there is no way for the instruments to sound this way!
  Reply With Quote
Old 19th June 2012, 10:54 AM   #5
diyAudio Member
 
Join Date: Jul 2010
Ok , any suggestions about 50W Class A ?

regards.
  Reply With Quote
Old 19th June 2012, 02:27 PM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Why do you want a class A amplifier? A properly designed class B or class AB amplifier will produce clean audio (inaudible distortion levels).
  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
Car Amplifier Power Supply Perry Babin Car Audio 54 24th January 2014 03:58 PM
Amplifier for car hi-power abarth92 Class D 1 28th July 2011 03:31 PM
Increasing Output Power for the Engineer's Amplifier mewrei Tubes / Valves 3 28th December 2009 02:24 AM
Increasing Power Output of a Car amplifier Dj BASS AMP Solid State 5 5th October 2002 11:37 PM


New To Site? Need Help?

All times are GMT. The time now is 06:37 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