Teac X-10R

Six heads, two directions, and a dual-capstan transport Teac borrowed from the costliest decks in the catalog.

Overview

The X-10R is the deck Teac built when it decided the home enthusiast deserved the same transport tricks as the studio. Six heads ride the tape - forward erase, forward record, reverse playback, forward playback, reverse record, and reverse erase - in a quarter-track, two-channel stereo configuration. The machine records and plays in both directions without flipping a reel, and it uses separate heads for each job instead of a compromise shared head. The companion X-10 has three heads (erase, record, playback) and no reverse, so the R suffix is doing real work here.

Teac's own manual is candid about the transport's pedigree. The X-10R and the smaller X-7R use a dual-capstan closed-loop system, and the documentation notes that "the expertise and precision required has hitherto confined the method only to the costliest decks." Two pinch rollers and two capstans run at very slightly different speeds. The take-up-side capstan turns faster than the supply-side one, which keeps the tape taut across the heads. Reverse the transport and the speed differential has to reverse too. Teac's solution was flywheels with two zones of slightly different diameter, so when the capstan motor reverses, the drive belt repositions itself onto the correct zone automatically.

The capstan itself is a DC brush motor with FG servo, and the two reel motors are DC slotless units. Teac used Magnefloat bearings on the capstans. Opposing magnetic poles hold the bearings in place and eliminate vertical play with no mechanical contact at all, which the manual credits for the deck's low wow and flutter. Measured figures are 0.03% wow and flutter at 7½ ips and 0.04% at 3¾ ips, NAB weighted.

Speeds are 7½ and 3¾ ips, and the deck takes 10½-inch and 7-inch reels. The larger reel is the headline difference between the X-10R and the 7-inch-only X-7R. Frequency response is quoted at 30-28,000 Hz overall at 7½ ips (±3 dB, 40-20,000 Hz at −10 VU), tightening to 30-20,000 Hz at 3¾ ips. Signal-to-noise is rated 63 dB overall at 3% THD, weighted, with harmonic distortion at 0.8% at 1 kHz normal operating level and stereo channel separation of 50 dB at 1 kHz. Fast wind time is 100 seconds for 1,800 feet. The deck weighs 20 kg (44-1/16 lbs) net, and the X-10 comes in at 19 kg. Power requirements run 100/117/220/240V AC at 50/60 Hz, drawing 88W, with region-specific variants for Europe and the U.K./Australia.

Two features need a closer look. The first is electrical braking, exclusive to the R. Going from fast wind into any other mode, the deck sends reverse polarity to the supply reel motor. A magnetoresistive sensor watches tape speed and trips the mechanical brakes only once the tape is moving slowly. Because the brakes engage at low speed, they can be far lighter than conventional ones, so the reels turn by hand for threading and cueing with one hand instead of two. The manual is blunt about who benefits: anyone doing serious editing. The second is "real-time pause." Press pause and the pinch rollers retract only slightly from the capstans, leaving the tape in contact with the heads, so stop and start times are near-instantaneous.

The X-10R is also dbx-compatible. Teac provided dedicated sockets on the rear panel for the optional DX-2A noise reduction unit, and the manual says the combination captures the full 100 dB dynamic range of live music on tape. If no dbx unit is connected, shorting links must stay in place. Rack mounting kits were offered too, the RM-10 for the X-10R and the RM-7 for the X-7R, for standard 19-inch instrument racks.

Period coverage treated it as a serious machine with an awkward identity. Modern Recording (March 1980, p.74) noted the deck's dual-capstan closed-loop transport, electrical braking, two-way cue monitoring, and punch-in recording. The reviewer then admitted to being puzzled about the intended market: the feature set pointed at semi-pro work while the machine sat in the home market. The same review, on p.72, confirmed the six-head layout and automatic reverse of both record and playback, and on p.73 reported third-order distortion equivalent to just 0.13 percent at zero-dB record level and 7½ ips. Modern Recording (March 1980, p.74) gave dimensions of 17 inches wide, 17⅜ inches high, and 8½ inches deep, weight 44-1/16 pounds, and a price of $1300. That conflicts with the $2000 in the HiFi-Stereo listing, so pricing on this model looks era- and region-dependent.

What the record doesn't settle is when the X-10R was introduced, how long it stayed in production, or how many were built. What's clear is the engineering: a dual-capstan transport, six heads, electrical braking, and Magnefloat bearings, all in a 44-pound package that took the big reels. For anyone chasing a two-direction deck that behaves like it cost more than it did, that's the pitch.