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Most of you have noticed the hyphenated numbers on your address labels, and most of you guessed what they were: Expiration codes. If your label has a 1-12 number on it (or no hyphenated code at all), the next issue of The Stereophile, Issue Number 12 [published in September 1966—Ed.], will be the last one that will arrive on your present subscription.

Statistically, you 1-12'ers comprise almost a half of our total circulation, so your decision at this point will very likely determine the future,…

Experience 1
On August 25, 2016, John Atkinson, Michael Lavorgna, and I attended an event at Battery Studios, Sony's Manhattan-based music production facility.

The event itself was very personal, as we three were the only non-Sony people present at this particular session. (There were multiple sessions held that day.) We were introduced to Sony's latest hi-res personal audio products—the "Signature Series," which consists of the MDR-Z1R headphones $2199.99), NW-WM1Z ($3199.99) and NW-WM1A Walkman players, and the TA-ZH1ES headphone amplifier ($2199.99…

The Revelation seems to offer slightly greater depth and detail than the Source, although it is not quite so mellow…

When I first heard the original Superphon Revelation Basic a year or so ago, I was impressed with its sound, if not its features. At $399, it was, indeed, a revelation—one of those rare cases in which a product name that sounds like hype simply isn't.

The Revelation delivers a superb sense of spaciousness, excellent imaging and detail, and tonal neutrality. The original Revelation (which I call simply the "Basic") makes a number of more expensive preamps sound like poor values.

On the other hand, there…

1985 seems to be a particularly vintage year for high fidelity equipment, including some that's actually affordable. I recently had to help some impoverished "friends" put affordable systems together, and was horrified to find them quite good. Nothing, it seems, can be kept from the masses.

Here, to my consternation, is some truly high class equipment which is declasse only in price. If you are looking for rock bottom prices in the high end, I would strongly recommend the Superphon Revelation Basic Preamp ($329) and the DH-120 ($…

Anybody left? Good. Now we can talk about a very special little speaker. In a way, I didn't even want to review the 1S. I mentioned to John Atkinson that I'd heard them at my buddy Ruben's house and enjoyed them immensely, but I'd been using a pair of $13,000…

Description: Two-way dynamic design. Drivers: ¾" cloth-dome tweeter, 5" polypropylene-cone woofer. Crossover: not specified. Frequency response: 70Hz–20kHz, ±3dB. Impedance: 8 ohms nominal. Sensitivity: 85dB/W/m. Recommended power: 20–100W.
Dimensions: 12" H by 7" W by 9.25" D.
Finishes: teak, walnut, black ash (standard), others.
Serial numbers of samples tested: P02808 L/R, P02293.
Price: $1800/pair (1994); no longer available (2016). Approximate number of dealers: 35.
Manufacturer: ProAc, 130–132 Thirsk Road, Borehamwood, Hertfordshire WD6…

The Response 1S's B-weighted sensitivity was to spec at 85dB/W/m. Its impedance plot (fig.1) suggests that it will be relatively easy to drive, with a minimum magnitude of 5 ohms between 200 and 300Hz.

Moving to the frequency domain, fig.2 shows the individual amplitude responses of the woofer, tweeter, and port. As suggested by the impedance plot, the port's bandpass peaks just above 70Hz, which coincides, as it should, with the minimum-…