Alphasonik A-255 Stereo Power Amplifier - diyAudio
Go Back   Home > Forums > General Interest > Car Audio
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 15th July 2003, 04:09 PM   #1
diyAudio Member
Join Date: Jul 2003
Location: British Columbia
Default Alphasonik A-255 Stereo Power Amplifier

Howdy all..... :-)

Just pick up a used Alphasonik A-255 Stereo Power Amplifier and am looking for information on the wiring harness pin-out. It hasa schematic glued to the back of the unit but it's very hard to
read due to it being so scratched up.

Tried logging onto the Alphasonik web site but their $##@@!!! Flash/JavaScript junk just locks up my older computer....and of course, they don't have any alternative way of logging on. <grrr>

Some of you participants might be interested in my project for this rascal....I would like to use the module as the power amp section for a portable battery powered guitar/vocal amplifier.

If you have any thoughts or information regarding the above, they would be most appreciated at this end of things.....thanks! :-)
  Reply With Quote
Old 22nd July 2003, 02:14 PM   #2
diyAudio Member
tsmith1315's Avatar
Join Date: Jul 2003
Location: Doerun, GA
The Alphasonik site doesn't have any information on their older stuff anyway...

That amp is circa 1985, and is a solid 55 watts per channel. A great amp, and one of the very best values in its day. Current draw is in the order of 10 amps, so battery power sounds questionable unless you're using a car battery with charger attached (60Hz hum likely).

The amp has speaker level inputs R+, L+ and one ground, +12V turn-on, and speaker outputs on the molex plug. 8 wires total, right? Bridge mono by just using the R+, and L- outputs.

Let's see if I have the wiring color code around here...

This is from their MA series that replaced the A's, but I don't think the color codes changed. If the colors match yours, the assignments will be correct:

Orange: +12V turn-on

Yellow: R+ speaker level input
White: L+ speaker level input
Purple: speaker level ground

Gray: R+ output, or bridge mono +
Blue: R- output
Brown: L+ output
Green: L- output, or bridge mono -

Stable to 2 ohms stereo or 4 ohms mono

Feel free to email, I'm a great fan of the old Alphasonik stuff.

  Reply With Quote
Old 22nd July 2003, 04:25 PM   #3
diyAudio Member
JOE DIRT®'s Avatar
Join Date: Apr 2003
Location: Brantford, ON
there should be a thicker red and black wire also that is your main power in.....the orange is for remote turn on

  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
Heathkit AA-1800 Stereo Power Amplifier Sithlord2007 Solid State 46 26th May 2015 08:35 AM
Sony TA-N731 - Stereo Power Amplifier Headfood Vendor's Bazaar 1 4th March 2011 04:41 AM
TEC6950 Stereo Power Amplifier joka22 Solid State 0 3rd July 2007 12:01 AM
All Tube Stereo power amplifier Dusk Tubes / Valves 11 18th September 2006 12:51 PM
LA4743B Car stereo BTL 4-channel (45 W x 4) power amplifier IC emuman100 Chip Amps 2 15th March 2004 07:21 AM

New To Site? Need Help?

All times are GMT. The time now is 03:50 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