Teac X-300 (circa 1983)

A three-head quarter-track deck built around the short-lived EE tape formulation - and the quiet reason so many of them still run.

Overview

The X-300 is a quarter-track, two-channel stereo open-reel deck with three heads: erase, record, playback. The transport runs at 19 cm/s and 9.5 cm/s, which is 7½ and 3¾ ips in the units most owners in North America grew up with. It takes 7-inch and 5-inch reels. It weighs 14 kg net, or roughly 31 pounds, and sits in a 410 × 326 × 231 mm case. None of those numbers is dramatic on its own. The interesting part is that Teac built it specifically to exploit "EE", the extra-high-output open-reel tape formulation that appeared in the early 1980s and then evaporated as the format lost ground.

The manual is explicit about this. The X-300 and its auto-reverse sibling, the X-300R, were "designed to match the newly developed 'EE' magnetic open reel tape," and the published specifications were measured using EE tape. That matters for anyone buying one today, because EE tape is essentially unobtainable. Playback equalization is switched for the two formulations. At 19 cm/s the deck expects 3,180 µs plus 50 µs for LH tape and 3,180 µs plus 35 µs for EE. At 9.5 cm/s those become 3,180 µs plus 90 µs and 3,180 µs plus 50 µs. Standard tape works fine, and the signal-to-noise figures just drop, from ≥51 dB (EE, playback, 19 cm/s) to ≥49 dB (LH, same conditions). Overall, LH tape at 19 cm/s gives ≥47 dB. EE gives ≥48 dB.

The transport is a three-motor design: one DC servo capstan motor and two induction reel motors. Bias frequency is 100 kHz. Wow and flutter is quoted at 0.06% WRMS in playback at 19 cm/s, rising to 0.10% WRMS at 9.5 cm/s. Record/playback figures are 0.08% and 0.15% WRMS respectively. Fast winding takes 140 seconds or less for a 550-meter reel. Pinch roller pressure is specified at 1.5 to 1.7 kg, take-up torque at 330 to 470 g-cm, back tension at 220 to 280 g-cm. The deck will operate vertically or horizontally, which sounds trivial until you're trying to fit one into a shelf.

Connections are straightforward. Line input is specified at −12 dB (195 mV) into 50 kΩ, minimum −22 dB (61.5 mV). The mic input sits at −60 dB (0.775 mV) into 10 kΩ with a −70 dB (245 µV) minimum. Output is −5 dB (436 mV) into 10 kΩ, with a maximum of +1 dB (0.869 V), and the headphone jack is specified at −24 dB (48.9 mV) into 8 ohms. Power requirements vary by market. The general export model takes 100/120/220/240 V AC at 50/60 Hz and draws 85 W. The US and Canadian version is 120 V, 60 Hz, 70 W. European and UK/Australian versions run 220 V and 240 V respectively at 85 W, and the Japanese domestic version is 100 V, 60 Hz, 70 W.

Service documentation in the archive carries a September 1983 date, which is the firmest anchor for when this deck was in production. The X-300R, the auto-reverse variant, adds a kilogram at 15 kg net and shares the same front-panel layout family. Parts listings show the two models diverge at the head housing and front panel assemblies, which is what you'd expect from an auto-reverse mechanism grafted onto the same chassis.

The record does not contain a price, a production run, or a contemporary lab review. The X-300 appears in the archive almost entirely through its own documentation - owner's manual, service manual, parts lists - rather than through the audio press. That's a common fate for decks that arrived late in the open-reel timeline, after the magazines had largely moved on to cassette and CD. Collectors are working from manufacturer data rather than independent measurement, so the published numbers are claims, not verified results. Contemporary coverage of Teac's open-reel line in this era, such as the buyer's guides published in Audio (1986, p.231), typically grouped the company's decks alongside rivals like the Revox B77 MkII, Tandberg TD 20ASE, and Uher 6000 rather than singling any one model out for a dedicated lab test.

The X-300's reputation rests on what owners find when they open one up. The internals are conventional Teac: a JRC-4558D op-amp front end, an HA-11122W, and a run of 2SK-68AM FETs in the record/play amplifier section. Nothing exotic, nothing hard to source. The mechanical side is similarly serviceable. Tension roller assemblies, pinch rollers, and capstan belts are all catalogued parts, and the aftermarket still supplies them. That parts availability, more than any single specification, is why these decks keep turning up in working condition decades later.

The X-300 is not a half-track machine, so it won't play the two-track masters some archives hold. It is not a 10½-inch deck. The reel capacity tops out at 7 inches, which limits how much uninterrupted material fits on a side. And it is not an EE-era deck you can fully exploit today, because the tape it was voiced for is gone. What it is: a quarter-track three-head machine with a servo capstan, a 100 kHz bias oscillator, and a documented service history. For dubbing old quarter-track tapes or casual recording, that's enough.

Market Value

┌──────────────────────────────────────────────────────────────────────────┐
│ TEAC X-300                                                      Nov 2026 │
├──────────────────────────────────────────────────────────────────────────┤
│ High      $699                                    Latest            $538 │
│ Median    $311                                    Trend                — │
│ Low       $201                                    Volume           ~3/mo │
├──────────────────────────────────────────────────────────────────────────┤
│   $700 ┤                                                                 │
│        │                                                            .    │
│        │                                           .                     │
│   $486 ┤         .                                                      .│
│        │                                                                 │
│        │                                                            .    │
│        │                         .                    ..                 │
│   $200 ┤.                             .                   .              │
│        ├─────────────────────────────────────────────────────────────────│
│    vol │▄        ▄               ▄    ▄            ▄  ▄▄  ▄         █   ▄│
│        └─────────────────────────────────────────────────────────────────│
│         2026-04                      2026-06                      2026-08│
└──────────────────────────────────────────────────────────────────────────┘

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