IME...

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

IME...

Posted by Duster (M) on February 12, 2010 at 11:45:26

In Reply to: So where do I find out how and what to do to "tweak" it? posted by Muzikmike on February 11, 2010 at 12:59:52:

A Tripp Lite PSU performs worlds better to my ear than any wall wart I've ever tested for audio (and I’ve tested quite a few of them). In my experience, no worries about a 4.5A max (3A continuous) rating for a low current device. I use a Tripp Lite PR-4.5A to power a 40mA draw Nakamichi subwoofer crossover (10.8VDC - 15.6VDC allowable). I would not be concerned about a 13.8VDC PSU for either of your units. However, confirmation of my anecdotal opinion should be sought from folks who can be *definitive* about your particular gear if powered by a Tripp Lite PR-4.5A.

As too the matter of amperage, 500mA and 200mA are minimum requirements. Having plenty of power supply headroom is a good thing, up to a point. Meaning, I would not use a high current 12A PSU to power a low current draw device. That would be over the top, energy wasting while idle, and potentially unsafe, IMHO. As for safety and protection, the Tripp Lite PR-4.5A already has its own chassis mount AC fuse, and I use a 1A inline fuse for a DIY DC power umbilical built for the subwoofer crossover unit.

As to a high current outboard PSU application that I also have experience of, I also happily implement a 12-Amp Tripp Lite PR-12 to feed a vintage Spectron 600 power amplifier (yes, the now noble maker of SOTA digital power amplifiers) placed in my computer audio system, and to my ear the amplifier sounds just as sweet as it did when it was powered by a battery in a nominal 12V mobile audio environment. I use a 10A inline fuse for the DIY DC power umbilical built for that high current application.

The mods I mentioned are quite simply an inline IEC inlet (and a detachable audiophile power cord), vibration control footers (and a plinth), a film and foil bypass capacitor, and a fused DIY DC power umbilical. That's all I've done and think that’s all that’s required for my own wants/needs. You can see more detailed info about the mods listed on my Inmate Systems page located in the "Customized Stereo Subwoofer System" section:

http://cgi.audioasylum.com/systems/3454.html (Open in New Window)

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Follow Ups Full Thread

Topic - A bit of discussion about power supplies at the Vinyl Asylum instead of wall-warts - Muzikmike 15:22:25 02/09/10 (15)

How about old Lab supplies? - Paul J. 20:21:47 02/11/10 (0)

RE: A bit of discussion about power supplies at the Vinyl Asylum instead of wall-warts - tubesguy 13:52:58 02/10/10 (2)

What are you getting (or have already) - Muzikmike 15:11:23 02/10/10 (1)

Vendetta :-) nt - tubesguy 07:51:31 02/12/10 (0)

What are the power requirements of the two units, Mike? - 1973shovel 05:22:18 02/10/10 (10)

Wall worts...make some beer! - Muzikmike 12:23:35 02/10/10 (9)

Wall worts? I thought they were called wall warts. - 1973shovel 07:57:14 02/11/10 (2)

Wort: A beer brewing pun... - Duster 11:44:02 02/11/10 (1)

Thanks Duster - 1973shovel 14:20:55 02/11/10 (0)

I dare say a Tripp Lite PR DC PSU... - Duster 19:26:34 02/10/10 (5)

So where do I find out how and what to do to "tweak" it? - Muzikmike 12:59:52 02/11/10 (4)

IME... - Duster 11:45:26 02/12/10 (2)

Gold Box PSU - GGA 08:35:46 02/13/10 (1)

KingRex PSU - Duster 14:41:50 02/13/10 (0)

RE: "What about amperage?" - 1973shovel 14:18:37 02/11/10 (0)

Follow Ups

IME... - Duster 11:45:26 02/12/10 (2)

Gold Box PSU - GGA 08:35:46 02/13/10 (1)

KingRex PSU - Duster 14:41:50 02/13/10 (0)

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