Sony CDP-590
A mid-line single-disc player from Sony's late-eighties/early-nineties CD boom — unglamorous, plentiful, and quietly competent where it counts.
Overview
The CDP-590 doesn't get the collector's pulse racing the way an ES-series flagship does, and that's exactly the point. This was a working player, priced to move in the middle of Sony's CD range, and the surviving documentation paints a picture of a machine that hit its numbers without drama. Audio (October 1990, p.168) listed it at $225.00 in its annual CD player and D/A converter directory, slotting it below the CDP-690, CDP-790, and CDP-990 in the same lineup. That price is the tell: this was the sensible choice, not the aspirational one.
What the service manual confirms is a single-disc Compact Disc player with a 16-bit, 8-times-oversampling digital section — the directory entry in Audio abbreviates it as "16.8X," which is the same figure in shorthand. The converter is a single DAC handling both channels, not the dual-mono arrangement of the pricier ES machines. Frequency response is quoted at 2 Hz to 20 kHz ±0.5 dB, signal-to-noise ratio above 100 dB, dynamic range above 92 dB, harmonic distortion under 0.008%, and channel separation above 95 dB. Those are honest mid-fi numbers for the period — the distortion figure in particular is a touch higher than the 0.005% Sony claimed for the CDP-690 and the 0.003% claimed for the CDP-790 just above it, which is the kind of small step-down you'd expect moving down the range.
The physical package is modest and, frankly, easy to live with. The manual gives dimensions of 430 × 100 × 280 mm and a weight of roughly 3.5 kg (7 lbs 12 oz) — light enough to slide onto a shelf one-handed, and shallow enough that it won't crowd a deep cabinet. Power draw is 11W, so it runs cool. Outputs are a pair of RCA line-outs at 2 V into 50 kilohms, plus a stereo phone jack delivering a maximum 10 mW into 32 ohms. The supplied accessories were an audio cord and a remote commander with two AA batteries — so yes, this one shipped with a remote, which is more than can be said for some of Sony's own entry models.
One detail worth flagging for anyone buying on the used market: the service documentation includes a SUPPLEMENT-1 covering the addition of a UK model, and it explicitly notes that CDP-590 units for the AEP and UK markets were made in France. The label identification instruction is blunt — look for "MADE IN FRANCE" on the set. That matters because power requirements differ by territory; the manual excerpt in the archive lists 120 V AC, 60 Hz for the version it documents, while European units would naturally be set up for their local mains. Buyers should confirm the voltage of the specific unit in front of them rather than assuming.
The feature set, as far as the record shows, is the standard late-eighties CD toolkit: track programming, repeat, and the usual search and display functions. The archive doesn't preserve a full feature list for this model, and it's not worth inventing one. What's clear is that this was a competent, unremarkable player in a market flooded with competent, unremarkable players — and that's precisely why so many survived. The 16-bit/8x architecture is period-correct and nothing more; don't expect the transparency of the ES machines, and you won't be disappointed.
Repair-wise, the service manual exists and circulates, which is the main thing. The laser emission check notes in the documentation are the usual warnings — observe from a safe distance when checking diode output — and the leakage test procedure is spelled out for anyone doing bench work. Beyond that, the archive holds no consolidated failure history for this model, so common-problem claims would be guesswork and are best left out. What can be said is that a player this simple is generally easier to keep running than a loaded changer, and parts are not the nightmare they are for exotica.
If there's a case for the CDP-590, it's the case for any honest mid-line component: it does the job, it's cheap, and it doesn't pretend to be something it isn't. The Audio directory entry is the whole story in one line — a $225 player with 16-bit/8x conversion and specs that clear every bar that mattered in 1990. Enthusiasts who want a museum piece should look elsewhere. Enthusiasts who want a CD player that works, for the price of a decent dinner, have found their machine.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.