Canuck Audio Mart Hifi and Audio ForumCanuck Audio Mart Hifi and Audio Forum
It is currently Sun Oct 22, 2017 3:07 pm

All times are UTC - 8 hours




Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Which Power Supply ?
PostPosted: Mon Jan 14, 2013 5:57 pm 
Offline
User avatar

Joined: Fri Feb 17, 2012 5:25 pm
Posts: 1008
Location: Toronto
Hi guys,
I want to be able to test car amps at home, instead of taking them to my local shop. Which of these power supplies do you recommend, that is safe etc ?

http://radioworld.ca/power-supplies-c-73_698_203.html

thanks

_________________
Pioneer SA-610, CT-F615, TX-710, DT-500, HPM-100 : Technics 1200 MK2: Sony CDP-302
ImageImageImage


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Mon Jan 14, 2013 6:17 pm 
Offline
User avatar

Joined: Mon Mar 31, 2008 9:17 am
Posts: 13719
Location: Toronto, ON, CA
Depends on what you're testing them for, sq or dbmax. The biggest supply listed can deliver a max of nearly 1000w, split over 2 channels. Does this sound like enough to you?

_________________
To a hammer, everything looks like a nail


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Mon Jan 14, 2013 8:24 pm 
Offline
User avatar

Joined: Fri Feb 17, 2012 5:25 pm
Posts: 1008
Location: Toronto
SQ.

_________________
Pioneer SA-610, CT-F615, TX-710, DT-500, HPM-100 : Technics 1200 MK2: Sony CDP-302
ImageImageImage


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 7:20 am 
Offline
User avatar

Joined: Mon Mar 31, 2008 9:17 am
Posts: 13719
Location: Toronto, ON, CA
Well they all look pretty much the same to me. In the case of power supplies, there's no such thing as too much power. Pick the one you can least afford and go with it.

_________________
To a hammer, everything looks like a nail


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 7:48 am 
Offline

Joined: Sat Jun 28, 2008 12:05 pm
Posts: 721
Location: Ottawa, ON, CA
If you are looking to power the amps for testing on an occasional basis why not just invest in a good 12V car, Cycle, or Marine battery and a charger. That's all I needed when testing my equipment. If I was a shop I would have invested in a good bench PS.

Mike


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 7:51 am 
Offline
User avatar

Joined: Thu Nov 03, 2005 1:11 pm
Posts: 434
Location: Cambridge, ON, CA
Why not just use a car battery ? It will best simulate actual conditions .


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 7:56 am 
Offline
User avatar

Joined: Fri Feb 17, 2012 5:25 pm
Posts: 1008
Location: Toronto
pelsby wrote:
Why not just use a car battery ? It will best simulate actual conditions .

They say thats not safe to use.

_________________
Pioneer SA-610, CT-F615, TX-710, DT-500, HPM-100 : Technics 1200 MK2: Sony CDP-302
ImageImageImage


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 8:07 am 
Offline

Joined: Fri May 21, 2010 8:20 am
Posts: 351
Location: Spruce Grove, AB, CA
If safety is a concern, get a dry cell 12 volt battery. You can turn it upside down, use and abuse, very tough and no gasses from acid.


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 12:50 pm 
Offline
User avatar

Joined: Mon Mar 31, 2008 9:17 am
Posts: 13719
Location: Toronto, ON, CA
MikeChurchward wrote:
If you are looking to power the amps for testing on an occasional basis why not just invest in a good 12V car, Cycle, or Marine battery and a charger. That's all I needed when testing my equipment. If I was a shop I would have invested in a good bench PS.

Mike
This is certainly a more cost effective solution. Only caution needed is to use the charger properly and keep the battery well ventilated.

I don't think it represents true operating conditions though, as the amp would draw from the generator (alternator) where the battery acts as a capacitor to filter ripple. This is closer to an active supply than a battery alone. Only problem is that delivering the amounts of current that a generator can produce is expensive any other way.

It's a tough call, but if you're making out in the back seat with your babe you're probably not running the engine anyway :lol:

_________________
To a hammer, everything looks like a nail


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 2:51 pm 
Offline

Joined: Sat Jun 28, 2008 12:05 pm
Posts: 721
Location: Ottawa, ON, CA
Robcrx wrote:
pelsby wrote:
Why not just use a car battery ? It will best simulate actual conditions .

They say thats not safe to use.


You can get a Marine grade battery which can be totally submerged in water and still work. There are no safety concerns as they are completely sealed. I use one in my jeep and it works fine even when I am in water deep enough to cover the engine compartment and running on the snorkel. Mind you salt water would be an issue!


Cheers;


Mike


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Tue Jan 15, 2013 3:23 pm 
Offline
User avatar

Joined: Fri Feb 17, 2012 5:25 pm
Posts: 1008
Location: Toronto
Ya but I prefer a Power supply with a power on/off switch just in case I mess up the connections. :lol:

_________________
Pioneer SA-610, CT-F615, TX-710, DT-500, HPM-100 : Technics 1200 MK2: Sony CDP-302
ImageImageImage


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Wed Jan 16, 2013 2:44 pm 
Offline

Joined: Tue Dec 29, 2009 5:38 pm
Posts: 2200
Location: Ottawa, ON, CA
Install a switch. It's pretty easy.

I used a compact ATV battery when I was testing car amps and stuff. I also had a 12V regulated power supply, but I found the battery easier to use. Just install a switch and off you go.


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Wed Jan 16, 2013 3:45 pm 
Offline

Joined: Sat Feb 21, 2009 6:48 am
Posts: 151
Location: Winnipeg, MB, CA
Hey
I used to use a Stabylex SM50 and car battery for testing, it now sits in a corner collecting dust. The power supply would continuously put out 40A but could get bumps of 300A with the battery for a few seconds. I now have a 200A power supply and rarely need to use a battery for extra current. Of all that are shown the Astron VS-70M would be my choice since it has current limit control which is handy for troubleshooting. The Alinco isn't too bad but you would need to put a battery on it since it has a much higher output noise than the linear supplies.
Good luck, J


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Fri Jan 18, 2013 1:58 pm 
Offline

Joined: Fri Jan 18, 2013 1:44 pm
Posts: 1
Location: Kingston / Toronto, ON, CA
l'd try using an old computer power supply. I had a friend who used one for testing head units, I'm sure this will work for amps also.


Top
 Profile  
Reply with quote  
 Post subject: Re: Which Power Supply ?
PostPosted: Fri Jan 18, 2013 2:23 pm 
Offline

Joined: Tue Sep 27, 2005 7:00 pm
Posts: 497
Location: Waterloo, ON, CA
I run a Car Audio Business since 97, THE supply to look for is a Cascade Audio unit. - high current, low noise, very efficient!

Will.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group