Tag Archives: amplifier

Asheville, Walnut Cove, Biltmore Forrest and Western North Carolina’s Audio and Home Theater specialists present Cane Creek AV and Paul McGowan – PS Audio, Intl.

Right tool, right job

You can make almost anything work. Getting things to work right is a bigger challenge.

Take for example a Power Plant AC regenerator. We’d love to use Class D amplifier technology for the output but have consistently stayed with good old Class A/B. Right tool, right job.

Class D amplifiers can be terrific for the reproduction of music and so too can Class A/B. The reason either can work for music but only one for a regenerator is because the jobs are different: powering loudspeakers isn’t as extreme as powering equipment.

Speakers might demand instantaneous current approaching 10 amps for short periods of time—a workable challenge for both amp topologies. Equipment and AC power routinely demand 50 to 60 amps for a regenerator—at 5 times the voltage presented to a speaker. That’s a job for an amplifier without a heavy output filter.

In the same vein, using a vacuum tube for the input rather than the output, or a DC servo instead of a blocking capacitor, is the essence of using the right tool for the right job.

Hard to know what’s right and what’s wrong if you’re not a designer yourself. Which is why it’s important to find a company or a designer you can trust.

Right tool, right job offers the best performance.

 

Asheville, Walnut Cove, Biltmore Forrest and Western North Carolina’s Audio and Home Theater specialists present Cane Creek AV and Paul McGowan – PS Audio, Intl.

Audiophile rating system

While answering a customer’s question about matching amps to speakers an old memory popped into my head. The industry’s effort to craft an audiophile rating system.

It was a few decades ago but back then the idea seemed promising. Within the audiophile community, we’d set up a rating system for sound quality to insulate us from the overzealous performance claims of mass market consumer audio companies. Perhaps it would be on some sort of sliding scale or points system, whatever. It really didn’t matter how the metrics worked, just that there would be some agreed upon standard of performance. Once that was decided then manufacturers could submit their products to a listening panel for review. That panel would then rate the product to be “audiophile approved” or not. This rating could apply to equipment and recordings as well.

The purpose of this rating system was simple: a means to separate the wheat from the chaff. If you go online and read the descriptions of power amplifiers, for example, everything from a $19.95 20-watt amp to actually decent sounding products all claim to be “high-performance” or “audiophile grade”. Clearly that is not true nor will it ever be true.

So, how’s a customer suppose to decide if an amplifier, CD player, preamp, recording, or loudspeaker meets some sort of minimum standard of performance? What might be helpful is a stamp of approval similar to a Michelin Star system but without the gradations. Just approved or not approved. Simple.

In the end, the idea was abandoned because of manufacturer infighting. Who would make these judgments? Who would maintain them? Wouldn’t members of the review board wield too much power over the industry? Would there be an appeals process? What if bribery got involved?

My arguments were on the flipside. Perhaps manufacturers that wanted to be approved but weren’t could be given a ratings sheet letting them know where they fell down: poor FR, flat imaging, 2-dimensional sound, too bright, too this or not enough of that. Then, their engineers could upgrade the product until it met with approval. Bingo! Better sales, better sound. Win, win.