Sony MDX-CA790X (2003)
A flip-down MiniDisc head unit from the format's final stretch — 50 watts, three tuner bands, and a faceplate that detaches.
Overview
The MDX-CA790X is an in-dash MiniDisc car player that Sony introduced in February 2003, according to minidisc.org, which lists it as an "in-dash MDLP player." That same source records a street price of €270. It's an in-dash MDLP player built around the MiniDisc format at the tail end of MD's commercial life, and it carries the features you'd expect of a late-era Sony car deck: MDLP playback, a flip-down detachable face, and a built-in amplifier rated at 50 watts.
That 50-watt figure comes from a single source — an eBay product page — and the per-channel output is documented as 50 W × 4 at 4 ohms. The faceplate is described as a "flip-down detachable face," which is the theft-deterrent arrangement Sony favored on its better car decks of the period: the panel motors down and lifts off, leaving a blank chassis in the dash. The tuner covers FM, MW, and LW, per the ManualsLib listing for the German-market documentation.
One thing worth flagging up front: sources are inconsistent about whether this deck is the MDX-CA790X or the MDX-CA790. Avito listings render it as "Sony MDX-CA 790X" and "Sony MDX-CA 790," and baza.drom.ru separately lists an "MDX-CA790" sold with a Sony CD changer. The available documentation does not disambiguate the two designations, so collectors should treat any claim about one as potentially applying to the other until a service manual settles it.
Key Features
Flip-Down Detachable Face
The faceplate flips down and detaches, per the eBay product description. This is the security feature that defined upmarket Sony car decks of the era — the panel hides the slot and the controls when the car is parked, and the chassis left behind is unremarkable to a thief. The mechanism is the part most likely to wear or fail on any flip-face deck, though no specific failure data for this model turned up in the research.
Built-In 50-Watt Amplifier
Sony fitted the MDX-CA790X with a built-in 50-watt power amplifier, according to the eBay listing. The per-channel figure is documented as 50 W × 4 at 4 ohms, so that's 50W across four channels. Either way, it's a head-unit-powered arrangement — no external amp required — which is how most MDLP decks were configured for straightforward installs.
MDLP Playback
The deck is an "in-dash MDLP player," per minidisc.org. MDLP — MiniDisc Long Play — let users record and play back MDs at reduced bitrates for roughly double or quadruple the running time of a standard disc. The specific MDLP version isn't stated in any source, so the exact recording modes supported are unconfirmed. Playback of MDLP-encoded discs is the headline capability, and it's the reason this deck exists at all: by 2003, MDLP was the format's main selling point against CD-R and the arriving hard-disk players.
FM/MW/LW Tuner
The tuner covers FM, MW (medium wave), and LW (long wave), per the ManualsLib documentation. The LW band is a European-market feature — it's included for the long-wave broadcasters that served parts of Europe and North Africa, and it's a signal that this deck was sold into European markets as well as Japan. Documented tuner figures include 9 dBf usable sensitivity, 75 dB selectivity at 400 kHz, 67 dB stereo / 69 dB mono signal-to-noise ratio, and 0.5% stereo / 0.3% mono harmonic distortion at 1 kHz.
Front-Panel RESET Button
A RESET button sits on the front side of the unit behind the front panel, per manuals.co.uk, and it restores the unit to its default settings. It's a small thing, but on a deck with stored presets and user settings, having the reset tucked behind the faceplate means you can't hit it by accident mid-drive.
Historical Context
Sony introduced the MDX-CA790X in February 2003, per minidisc.org, at a street price of €270. By that point MiniDisc was well into its second decade as a format, and MDLP — the long-play extension — was the feature carrying the car decks. One seller on Avito calls it "Самая последняя модель выпущенная Sony" — "the very last model released by Sony" — but that's an unverified seller claim and should be treated as such; no documentation confirms it as the final MD car deck.
The deck's documentation survives well. A 136-page English "Operating Instructions" manual is catalogued by manuals.co.uk, a Japanese-language user manual of the same length is listed by minidisc.wiki, and an installation manual appears on minidisc.org. An ISO adapter cable — "Radioadapterkabel- > Iso sony 16 Épinglette Mdx-Ca 580/790 X / XR 1300 1800" — is listed as compatible with the MDX-CA580/790X and the XR-1300/1800, which is useful for anyone fitting one into a European car with an ISO harness.
eBay Listings
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