workbench Q’s
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=39084
Printed Date: July 07, 2025 at 1:50 PM
Topic: workbench Q’s
Posted By: vdubmk4
Subject: workbench Q’s
Date Posted: September 13, 2004 at 3:46 PM
What do i need to set up a testbench like they have at car audio install bays and the such ? Like a ac to dc converter ? if so what kind or specifications would i need to support a car amps and stuff ? ------------- Fortune: You will continue to take chances, and be glad you did.
Replies:
Posted By: Ravendarat
Date Posted: September 13, 2004 at 4:04 PM
If you simply want to do testing I suggest something like a 50 amp power supply with a permament source unit and a board containing terminals for easy hook up, they should consist of power ground speaker and RCA terminals. Other wise every thing else is just personal preferance. You could also add a volltage and ampreage gauge. Note that the 50 amp supply can be substituted for a smaller one if it is going to be used strictly as a test only station. I have a 50 amp supply but I use my bench for music in the shop and generally have some misc amp and sub hooked up as well. If you wanna go ghetto you can buy a battery charger and hook it up instead of a power supply, it provided the same basic end result, and are generally less expensive. Thats what I woulda done had I not had an Extra power supply hanging around from an old board.
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: NowYaKnow
Date Posted: September 13, 2004 at 4:10 PM
You basically just need an AC to DC power supply. Anything from 20 - 50 amps should be fine for testing stuff.. Radio shack has a decent selection.
Mike
Posted By: vdubmk4
Date Posted: September 13, 2004 at 9:14 PM
Ravendarat, so its cool to just use a battery charger ? even if for extended use (a couple of hours perhaps). NowYaKnow, thanks for the advice. ------------- Fortune: You will continue to take chances, and be glad you did.
Posted By: Ravendarat
Date Posted: September 14, 2004 at 12:34 AM
As long as its a battery charger capable of putting out enough voltage on a medium or high setting, you dont wanna run it on the start setting for that long, refer to the manual for the charger.
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: kgerry
Date Posted: September 14, 2004 at 1:46 PM
keep in mind it will be unregulated voltage which as a rule is never recommended.... spring the few bucks to buy a proper regulated power supply as was suggested to you......
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: Ravendarat
Date Posted: September 14, 2004 at 2:22 PM
For my own personal knowlege, what kinda affects is having a regulated power supply over an unregulated power supply on a test bench gonna do?
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: jeffchilcott
Date Posted: September 14, 2004 at 7:10 PM
unregulated, voltage spike, and as said before. Most electronic items run on smoke, when you let it out they quit working
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: russ lund
Date Posted: September 21, 2004 at 10:33 AM
Good one Jeff! I like to tell the customers that if they let out the"Magic Smoke" we have to put it back in before the unit will work.
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BigDog
Posted By: kgerry
Date Posted: September 21, 2004 at 11:39 AM
as mentioned the possiblity of voltage dropouts or worse, spikes... also, the nasty 60 cycle hum you get from most cheap battery chargers
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
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