Akai X-150D

History

Every machine in this corner of Akai's line is built around one idea: the crossfield head, which puts the bias field on the far side of the tape from the recording head instead of stacking both behind the same gap. A period X-150D operator's manual brands the machine a "CROSS-FIELD Custom Deck" and lists three heads for it — erase, record/playback, and a separate bias head — the same three-head layout this site's own specs page confirms, from a different manual scan. The principle wasn't Akai's own invention: Tandberg gets the credit for introducing it, and one museum-database site claims Akai licensed it and used it first on the M-7 (1962) and M-8 (1964), years before the X-150D existed. That's a database claim, not a factory document, so it stays at that tier here.

Akai's own naming split decks from full recorders with a trailing D — this machine only ever exists as "X-150D," never as a bare "X-150" with built-in amplifier and speakers, and period trade listings consistently price it as a "Stereo Deck" while non-D Akai models are listed as complete recorders. No factory document spells out what the D stood for in as many words; it's period usage plus the specs transcribed here — line and DIN outputs only, no power amp — that make the case.

Before the X-150D came the X-100D, and the handover is confirmed in UK print: Which?, the Consumers' Association's magazine, noted in 1968 that the Akai X-100D was "being replaced by the X-150D" — the only UK editorial, non-advertising statement of the transition found in the period record. Studio Sound's own Tokyo factory-visit report and its Audio Fair coverage that spring both independently call the new deck a successor to the X-100D.

Japan saw it first. Akai's launch advertising in Swing Journal, November 1967, billed the X-150D as one of "3 New Stars" — alongside the X-1800SD and the 3000D — at ¥59,500, running a new-product quiz to a December 20 deadline. The same ¥59,500 figure recurs in Bungei Shunju's 1968 Akai ads and in the audio-heritage.jp database.

The UK followed in spring 1968. Studio Sound's report from that year's London Audio Fair, on the fifth floor of the Hotel Russell, puts the X-150D on Akai's stand at £106, against the restyled M9 at £159 — both built around the same "entirely unique Cross-Field bias system." That was a pre-Budget price: the same magazine's price table the following month, updated for that year's purchase-tax rise, lists "X150D ¼-track stereo £130 2s. 4d. new model," and £130 2s. 4d. is the figure that recurs through the rest of the model's UK life.

From there it's a story told mostly in discount ads. The earliest found is a December 1968 mail-order "Cash Discount" listing in Hi-Fi News, pricing it at £108/18/4 against the ~£130 list. Through 1969, Comet Discount Warehouse repeats the same pairing — £130 2s. 4d. list, £109 discount — in Practical Wireless issue after issue, and the same £109-class discount recurs in Hi-Fi News dealer lists from 1969 into late 1970. Comet is named again on two of those Hi-Fi News rows (November 1969, May 1970); the rest don't identify the dealer, so "Comet" isn't the safe label for the whole run — only for the ads that actually carry its name. By February 1971, K.J. Enterprises' winter clearance sale marks it down further still, to £105 against the same £130 list — one dealer's clearance, not a general 1971 street price. By March 1972 a Hi-Fi News & Record Review clearance list has it at £89.95, run out alongside similar markdowns on the 4000D.

Export markets tell a thinner story. Akai's German distributor, Akai International GmbH of Buchschlag near Frankfurt, priced it at around DM 900 in 1969 — Radiomuseum's database entry, so that figure stays at database tier here — rising to DM 998 in the c.1970 "Akai Programm" brochure, a period print source recovered via the Wayback Machine. A 1969 Der Spiegel ad appears to print that same DM 900 figure with a "Richtpreis + MWST + Gema" rider, which would make it the print source that promotes the DM 900 claim — but that page scan hasn't been eyeballed closely enough yet to make the call, so the tier holds for now. The same year, Al-Arabi's Kuwait edition carried the X-150D in an Akai export ad naming Middle East distributors, alongside the X-360, M-9, AA-5000/7000 and X-1800SD.

No Akai-branded X-150D appears in any US period magazine or directory the sweeps checked. HiFi/Stereo Review's 1969 Tape Recorder Annual — the period's US buyer's-guide directory — lists Akai's crossfield decks only under the Roberts badge, the American arm that rebadged Akai-built machines for the US market; no Akai-branded X-150D entry turns up in that directory either. Roberts' own 1740X carried a 22,000 Hz "Cross-Field response" spec in that same 1969 directory. Collectors identify the Roberts 1740X as the US-market twin of the X-150D; the pairing is consistent with the period record but is not documented in period print.

In the UK, the X-150D's price bracket passed to the cheaper 4000D: the 1970 Hi-Fi Year Book lists them side by side — X-150D at £103 19s. 7d. plus tax, 4000D at £79 15s. 8d. plus tax — and by the 1971 edition the X-150D has dropped out of Akai's line while the 4000D remains, though no yearbook text states the handover outright. Elsewhere in the range, the X-165D shares the same three-head crossfield layout and, per HiFi Engine's database, follows the X-150D in the model series (X-100D → X-150D → X-165D) — again a database claim, not a factory document. Period print does place the X-165D in Akai's small-deck slot afterward: Billboard's trade pages in October 1972 price it at $199.99, down from a $269.95 list, and High Fidelity's 1972 tape directory lists it as Akai's small three-speed deck. No period print explicitly names the X-165D as the X-150D's replacement — the timing supports the inference, but it stays an inference.

By August 1971 the X-150D is gone from Studio Sound's UK trade dealer list too, which by then carries the X-200D, X-330, X-360, 1800SD and 4000/4000D in its place. What's left after that is markdown and, once, a long tail: £89.95 by March 1972, and — outside this history's main 1965–72 window — two Hi-Fi News & Record Review classifieds in mid-1975 pricing a secondhand X-150D at £57.50, the last dated UK sighting the sweeps turned up. The only later dated sightings found anywhere are two US classifieds — a 1979 staff-newsletter listing and an April 2000 broadcast-trade ad — neither under Akai's own US marketing, if it ever had one.

Timeline

  • 1967-11 — Japan launch. Akai's launch ad in Swing Journal bills the X-150D as one of "3 New Stars," alongside the X-1800SD and 3000D, at ¥59,500. Print-confirmed — period ad scan, rehosted mirror, not worldradiohistory.com.
  • 1968 — "Being replaced." Which? records "Akai X-100D (being replaced by the X-150D)" — the only UK editorial confirmation of the handover found. Print-confirmed; exact month not exposed by Google Books' bound-volume record.
  • 1968-02 — Inside the factory. Studio Sound's Tokyo factory-visit report catches the X-150D mid-production, already billed a successor to the X-100D. Print-confirmed. Read the sighting.
  • 1968-05 — Audio Fair '68, pre-Budget. Studio Sound's London Audio Fair report puts the X-150D on Akai's Hotel Russell stand at £106, against the restyled M9 at £159. Print-confirmed. Read the sighting.
  • 1968-06 — Post-Budget price table. Studio Sound's June price table, updated for that year's purchase-tax rise, lists "X150D ¼-track stereo £130 2s. 4d. new model." Print-confirmed. Read the sighting.
  • 1968-07 — Audio Fair '68, again. Practical Wireless's own Audio Fair report independently confirms the post-Budget £130 2s. 4d. price and calls it "a cross-field stereo silicon transistor preamp type." Print-confirmed. Read the sighting.
  • 1968-12 — First discount ad found. A mail-order "Cash Discount" ad in Hi-Fi News prices it at £108/18/4 against the ~£130 list — roughly 16% off. Print-confirmed. Read the sighting.
  • 1969 — Germany and the Middle East. Akai International GmbH's German advertising and Al-Arabi's Kuwait edition both carry X-150D export copy this year. The Middle East placement is print-confirmed (Al-Arabi scan); the German list price stays database-only tier (Radiomuseum) — see the narrative above for the unpromoted Der Spiegel lead.
  • 1969 — US directory, no Akai badge. HiFi/Stereo Review's 1969 Tape Recorder Annual lists Akai's crossfield decks only under the Roberts name; no Akai-branded X-150D entry appears. Print-confirmed for the absence and for the Roberts 1740X entry itself — the 1740X/X-150D pairing stays collector-only (see above). 1969 Tape Recorder Annual.
  • 1969–1970 — £109 recurs in the trade press. Comet Discount Warehouse repeats "£130 2s. 4d. £109 0 0" in Practical Wireless through late 1969, and the same figure recurs in Hi-Fi News dealer lists from 1969 into a November 1970 listing. Comet is named again on two of those Hi-Fi News rows (November 1969, May 1970); the rest don't identify the dealer. Print-confirmed for the £130/£109 figures; dealer identity beyond the rows Comet is actually named on was not established. Practical Wireless, November 1969.
  • 1970 — Hi-Fi Year Book. The 1970 annual directory lists the X-150D at £103 19s. 7d. plus tax, on the same Akai spread as the cheaper 4000D. Print-confirmed. Read the sighting.
  • 1971-02 — K.J. Enterprises' winter clearance. One dealer's clearance ad prices it at £105 against the same £130 list — a single dealer's markdown, not a general 1971 street price. Print-confirmed. Read the sighting.
  • 1971 — Dropped from the yearbook. The 1971 Hi-Fi Year Book's Akai block keeps the 4000D but drops the X-150D — negative evidence the model was on its way out. Print-confirmed. Hi-Fi Year Book 1971.
  • 1971-08 — Absent from the UK trade list. Studio Sound's August 1971 dealer list carries Akai's X-200D, X-330, X-360, 1800SD and 4000/4000D — no X-150D. Print-confirmed negative evidence. Studio Sound, August 1971.
  • 1972-03 — End-of-line clearance. A Hi-Fi News & Record Review dealer clearance list marks it down to £89.95 from the £130 list, alongside similar clearance rows for the 4000D. Print-confirmed. Read the sighting.
  • 1972-10 — The X-165D, in the US. Billboard's trade pages price the X-165D, its apparent successor, at $199.99, down from a $269.95 list — the clearest dated marker of the line moving on. Print-confirmed for the X-165D itself; the succession relationship stays database-tier (see above). Billboard Music Week, October 1972.
  • 1975-06/07 — Last UK sighting. Outside this history's main 1965–72 window, two Hi-Fi News & Record Review classifieds (Russells of Wimbledon) price a secondhand X-150D at £57.50 — the last dated UK sighting the sweeps turned up. Later, dated sightings turn up only in the US: a 1979 staff-newsletter classified and an April 2000 broadcast-trade classified. Print-confirmed. Hi-Fi News & Record Review, June 1975.

Still looking for

  • A US-market appearance under Akai's own name. Every US directory and magazine checked sells this deck as a Roberts; if Akai ever advertised the X-150D itself stateside, it hasn't turned up yet.
  • A period review, not just a show report or a price row. Every sighting so far is a show report, a price list, or a dealer ad — no magazine has turned up yet that put the deck on a test bench and wrote up the results.
  • The Roberts 1740X in period print, named alongside the X-150D. The "US twin" story is real enough among collectors, but no period ad, review, or catalog naming both machines together has surfaced.
  • Electronics World, August 1969. A search index flags this issue for "X-150D" three times, but the archive's own search tools don't cover the file and nobody has opened the PDF to check — a lead sitting there, unread.
  • Factory documentation for the D suffix. Period trade usage and the operator's manual's own outputs — line and DIN only, no power amp — both point to "deck, no built-in amplifier," but no Akai document has been found that spells it out in as many words.
  • A period photo or ad scan worth mirroring here. The Swing Journal launch ad survives only as a rehosted scan on someone else's site, and the Museum of Magnetic Sound Recording's ad gallery has an X-150D thumbnail that's never been pulled at full size — either would be worth a proper local mirror if it turns up again.