Tandberg 10XD
A 10½-inch reel machine that runs 15 ips, records cross-field, and cuts tape hiss with Dolby B. Tandberg built it with pro ambitions.
Overview
The 10XD takes reels up to 10½ inches. It runs at three speeds - 15, 7½, and 3¾ ips - all electronically selected. The top speed is the headline. Fifteen inches per second is professional territory, and Tandberg built this deck to sit right at the border between the home rack and the studio machine.
The reason the 10XD matters is the pairing of two technologies. Tandberg's Cross-Field recording technique puts a separate bias head on the opposite side of the tape from the record head, and the 10XD applies it at all three speeds. Layered on top is Dolby B noise reduction — again, available across the full speed range. Tandberg's own advertising in DB-Magazine (March 1976, p.7) billed the result as a guaranteed minimum signal-to-noise ratio of 72 dB, measured on a four-track machine using IEC A-weighting, and claimed the deck "completely eliminates audible tape hiss." That's a manufacturer's number, not an independent lab result, and collectors treat it accordingly — but the Cross-Field-plus-Dolby combination at 15 ips is exactly the kind of engineering claim Tandberg was known for, and it's the reason the 10XD still commands attention.
The transport shows the pro intent. It has three motors, including a Hall-effect capstan motor, with electronic servo speed control and tachometer feedback for accuracy. There are four precision Tandberg heads, one more than many decks carry, including a separate bias head. The ferrite playback head has a symmetrical balanced output for hum cancelling and feeds a differential playback amplifier. Logic circuits control the operating functions electronically, with a facility for remote control. A photoelectric stop handles end-of-tape. Peak-reading meters watch both record and playback levels. A direct transfer from playback to record, a "flying start," allows punch-ins without stopping the transport.
The input section is built for actual work. Four input controls, two of them balanced microphone inputs, so a pair of mics can be mixed in stereo at the deck. From there the machine offers echo, sound on sound, add-a-track, editing, cueing, A&B monitoring, and mixing. The 10XD was never just a playback machine for pre-recorded reels — it was sold to people who intended to record with it.
The honest caveat is the same one that applies to every Tandberg reel deck of this vintage: rubber parts, belts, idlers, and electrolytic capacitors in the preamp and amplifier sections are decades old, and a 10XD that hasn't been serviced will need it. The 72 dB figure is a manufacturer's guarantee, not a bench measurement, and the Cross-Field head geometry means head wear and alignment matter more than on a conventional two-head machine. But for a collector who wants a 15 ips, 10½-inch, Dolby B, cross-field Tandberg in one chassis, there aren't many alternatives — and the 10XD is the one that bridged the gap between the consumer rack and the professional studio.
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