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In Reply to: RE: What is better? Filtered VH Audio Hot Box or Running Springs Audio Haley? posted by Plinko on February 09, 2009 at 06:49:09
Don't know the others, but VH Audio has a great basic design. If you use the unfiltered box, the only drawback I see is the steel box itself, but that's not critical really. (Non-ferrous boxes are better.) In fact, you can upgrade this basic strip with the Furutech plug and outlets Chris specs for this or even add the Oyaides if you want to spend for even higher quality.
But the box and especially the design of the wiring that Chris is using is very very good as is his cryoed cabling in that gauge and the PC design itself.
As to the filtering, I don't see that he offers the details. Email Chris Ven Haus, as he's very open and honest. If he's using R-C filters, they are a non-degrading improvement when done correctly and do not limit dynamics nor musicality - they increase the latter! If he's using inductors and other devices (and Chris is careful about such stuff) ask if he's using a take off on Jon Risch's AC filtering design, which also does NOT limit dynamics.
Follow Ups:
Chris used to use the Auricap .47/600v. I believe he still uses it.
RF suppression capacitors for AC line use are rated X or Y, depending on whether they are OK for line to neutral, or line to ground service, respectively. These caps are designed to not set your house on fire upon repeated exposure to voltage spikes on the AC line. The X type can fail open or short, and the fuse or breaker is expected to open in the event of failure to short. The Y type is designed to only fail open, as a short to ground could be a safety hazard. You will only find the Y type in small capacitance sizes, as it is expected that ground leakage current needs to be kept small to avoid tripping ground-fault interrupters.
The 600 volt rating on the Auricap is meaningless in this context. AC line spikes can easily exceed this level. If the cap develops a resistive leak upon puncture from a spike, the leak can get worse (lower resistance) with repeated spikes. The AC power dissipated may cause the cap to overheat and start a fire.
Unless the Auricap is labeled "X1" or X2" with at least a 150 volt AC rating, it is not safe to use as an AC filter for USA service. Most suppression caps are rated for 250 or 275 volts AC so they can be used in countries with 220-volt power as well as the USA.
Is there a particular model # and brand that is recommended for audio.
Are you using them in pairs like with the Auricap caps ?
I am also interested in knowing of a recommendation (brand & part number) for good sounding x rated caps. I've been using Auricaps for the past 4+ years.
Edits: 02/12/09
Another inmate recommended them and I've compared them against polyester, polyethylene, and ceramic suppression caps in various AC noise filters. I have a friend with a better system than mine and much better hearing. He agrees with my preference.
The Wima caps are available from Mouser and Farnell (Newark), as well as from TTI in larger quantities. Note that Mouser has a mistake in their catalog listing, as they call the MP3 Polypropylene. They are the correct metallized paper, as I've confirmed by purchasing some.
These caps do not use magnetic leads. Many raw parts have plated steel leads to allow automatic handling, and the steel wire is not good for audio. These caps also have epoxy encapsulation, and do not have strong acoustic body resonances.
Thanks Al. I will check out the Wima caps.
Thanks Al, for the most part I stop running the Auricap a couple of years ago even though I ran them after the secondary of an isolation transformer.
I switched to X-rated caps and have been very happy with these, I was just commenting on the Hot box power strip.
But it's always wise to let other know that one has to be careful in choosing Caps.
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