Krell KSA 50 – High End Stereo Equipment We Buy

McIntosh is one of the most dependable brand names when it comes to high-end audio systems. For years the brand has been recognized by audiophiles throughout the world as equipment that delivers clear and consistent quality in music. McIntosh is probably best known for its amplifiers and preamps, but the company produces many other components and parts for stereo and home theatre.

What are the specs for the Krell KSA 50?

Solid-state stereo power amplifier.
Maximum power output:
50W into 8 ohms (17dBW), doubles with each halving of load impedance down to 1 ohm.
19" W by 9" H (including feet) by 19" D (including handles)
60 lbs (net)."

What else to know about the Krell KSA 50?

"John Atkinson compared the KSA-50 with the KSA-50S in August 1995 (Vol.18. No.8):

I reviewed the original KSA-50 for the August 1983 issue of English magazine Hi-Fi News & Record Review, where I was very favorably impressed by its sound quality, enough so to purchase the review sample, which I brought with me when I moved to the US. The earlier KSA-50 has only unbalanced inputs, so for the comparisons with the KSA-50S, I hooked it up with 10' lengths of unbalanced AudioTruth Lapis fitted with RCA jacks. The '50S was auditioned in balanced mode so I wouldn't have to plug and unplug RCA connections, with all the potential for blowing up speakers and amps that that entails—hey, I own the B&W Silver Signatures and one of the amplifiers, okay? The balanced 'S was 3.8dB more sensitive than the unbalanced '50; again, levels were matched to well within 0.01dB at 1kHz.

Listening to the original '50, which I haven't fired up in almost six years, brought the memories flooding back. The soundstage was wicked big; the bass was wicked deep; the amp was wicked GOOD! In the "Christe Eleison," from the Mozart C-Minor Mass's "Kyrie" (Peter Schreier, Dresden Staatskapelle, Philips 426 273-2), Barbara Hendricks soars to a glorious climax. The old Krell allowed me to hear her voice lighting up the surrounding acoustic in a delightfully unambiguous way. And in the opening of the "Kyrie," the pulse of the dotted rhythm pushed the pace along.

The new Krell was significantly better than its predecessor in one important way: that gloriously liquid quality I noted earlier made the earlier Krell sound a little "electronic" by comparison. Hendricks' voice acquired a rather phlegmy edge via the older amplifier; the '50S presented it with a significantly more natural character. The original KSA-50's high frequencies were also grainier compared with the KSA-50S, and slightly sibilant. The new amplifier had altogether a more civilized, more neutral sound, I found. But when it came to the soundstage, the Dresden walls weren't illuminated to the same extent as they had been with the old amp.

And the new amp lost something of the sense of pace. It wasn't that it couldn't boogie at all, but when it did so, it was definitely in a more mannered way. Despite the more natural, less grainy presentation of the vocal, the combination of bass guitar and kickdrum on "Tell Everybody I Know," from the killer Keb' Mo' album (Okeh/Epic EK 57863), for example, could officially be classified as "polite" through the '50S. Perhaps as Krell designer Dan D'Agostino and the rest of us baby boomers get older, so does the sonic character of Krell amplifiers keep pace with our shifting desires.

While the Krell KSA-50S's bass is not quite as awesomely kick-ass deep as the earlier KSA-50, it has lost some of the slam, the "Wham, Bam, thank you, Dan!," that characterized the original KSA-50." - Stereophile, John Atkinson

Brief History of McIntosh

Long mapped-to Binghamton New York – the current headquarters and manufacturing center for Krell Labs – not many people know the brand was originally launched outside of the Nation’s Capital in Silver Spring Maryland, in 1949. In 1956, the brand built their original facility in New York, according to the official brand website.

StereoBuyers has purchased tens of thousands worth Krell brand equipment since 2014, with individual buys ranging from $100 to well over $50,000. If you are moving, ready to upgrade, or have Krell equipment you do not or will not be using, why not contact us today to find out if it is worth good money?

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The following images show actual Krell equipment purchased by StereoBuyers.