Finding the right amp for the perfect speaker

Gary Krakow Columnist • E-mail

I have recently discovered that finding the perfect loudspeaker is an amazingly daunting task. I’ve explained in the first part of this saga what it was like finding a near-perfect pair of Quad ESL-57 speakers — what I consider the best sounding speakers ever.

But, the speakers were only the first part of the equation. For the past few months I also have been trying to find the perfect combination of hi-fi gear (amplifier, pre-amplifier, tuner, CD and turntable) to go with the speakers. I think I’ve come pretty close.

During my quest, I’ve auditioned dozens of different components — especially amplifiers — and I zeroed in on some great sounding, affordable gear.

My 1962-era Quads still sound better than any other speaker I’ve ever heard. But, I’ve found that the speakers sound different with every amplifier I found.

I limited my search to components, which would not harm the speakers. You can literally blow a hole in Quads with amplifiers that are unstable or too powerful. Unfortunately, it’s way too easy to harm these speakers.

To keep my own pair of Quads safe I’ve auditioned mostly low-wattage amplifiers both tube and transistor designs.

Quad made — and actually still makes — amplifiers that are perfect for the task of making music.  I listened extensively to 70’s-vintage Quad 33 control and Quad 303 power amps. 

These were first-generation transistor models. Sound-wise they’ve held-up pretty well over the years. Actually, the 303 sounds very good — approaching the best of today's offerings. I like it much better than a pair of similar looking monophonic Quad 50E amps. 

On the other hand, the 33 preamp sounds somewhat dated. Surprisingly though, the 33 and 303, when paired with the matching Quad FM3 tuner, creates a system that is pleasant to look at and listen to.

Because of currently reasonable resale prices, used Quad 33s and 303s are perfect targets for upgrading.

QUAD The new Quad II Classic in the foreground and the original model in the background.

Before transistors, Quad made some of the most terrific-sounding tube designs on the planet. Because the Quad II amplifier is still in great demand as used equipment, the current owners have decided to begin producing the amps again in China.

The new Quad II Classic is a 15-watt, monoblock design.  That means you need one amp for each channel. Basically they are the same design as those made a generation ago — in the 1950’s. The new amps are fitted with a few modern-day parts to replace those that aren’t made anymore. The sound quality is smooth and clean. 

The new, matching Quad QC24-24 tube pre-amplifier I auditioned sounded pretty terrific in the system too.

I could probably install these new amplifiers — sit back and listen to the music — and be happy for the rest of my life. But, that would means I wouldn’t be inclined to try all the other gear out there. Quad II Classics retail for $2,700 for the pair.

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