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Marantz Sd9000dbx 3-head Cassette Deck - Incredible For Sale
Marantz Compudeck SD9000 DBX
Okay, Marantz fans - here's a piece that comes around maybe two or three
times in a decade - the very rare SD9000DBX. Back in 1980, Marantz introduced a
line of technologically advanced "Compudecks" - cassette decks utilizing
advanced microprocessor circuitry to control tape movement, timer actuation, and
program selection and retrieval. The SD9000 was the flagship of the Compudeck
line; the only deck in the lineup offering three heads - an erase head, a record
head and a playback head. The chief advantage of having a three-head deck is
that, with a flip of a switch, you can immediately compare your recording with
the original source material - a must for fine-tuning the deck to yield the
highest quality recordings possible.
As a global company, Marantz designed different variations of these decks for
different regions. The deck marketed in the US and Canada was the
two-speed version, which is consequently the deck almost always found on
here in the States. Marantz also built a single speed DBX version of
these Compudecks for the European market. Basically, the trade off is that
with the SD9000DBX, you get DBX noise reduction (usually found only in professional decks) in
lieu of the higher recording speed. DBX is considered to be the "Cadillac"
of noise reduction technologies, and pretty much kills all tape hiss in your
recording, without affecting dynamics as Dolby sometimes can. In addition, the SD9000DBX offers a
voltage selector for 110/120/220/240 VAC, a separate DIN plug in addition
to the normal RCA-style input/output jacks, and a removable line cord. In addition, this
deck includes a slew of other advanced
features like bias fine adjustment, an auto tape slack removal circuit, mic/line
mixing, electronic timer memory, solenoid-controlled, full-logic transport, and
the list goes on and on. The Marantz SD9000DBX - arguably the ultimate
vintage cassette deck. This may be the last one you see for a very long
As rare as this deck is, the optional RMC-1 wired remote control is even
rarer. If you are interested in supplementing your Compudeck with one of
these super-scarce options, one is being offered in a separate sale
Cosmetically, this particular unit is in outstanding condition -
check the detail pictures for yourself. There are a few tiny scratches on
the faceplate and around the screws on the top of the tape loading bay, but
these are difficult to see even in the high-resolution close-ups I've provided.
The rosewood vinyl clad wood side panels are in very nice shape, with just a bit
of distortion of the vinyl coating around the side screw holes. The rest of the
deck is close to perfect, with no dents, dings, or engravings. The
interior of the deck is minty-clean, and clear of any trace of corrosion.
The original power cord is included, and the original feet are in place.
Functionally, this unit is a perfect 10 out of 10. Everything I thought to test
(record, playback, Dolby and DBX tracking, programming) worked perfectly, smoothly, and noiselessly.
All switches function quietly and positively,
the rotary controls are smooth and noise-free.Plenty of fast-forward and
rewind torque. The tape heads show minimal wear; with no grooving or pitting
whatsoever. The rubber is soft and pliable; all belts and idlers have been replaced;
the transport and capstan motor have been lubed, the power supply board
recapped, and the heads meticulously cleaned and demagnetized. All in all, this is an outstanding specimen of a
cassette deck that is getting to be almost impossible to find. Don't let this
beauty slip away!
Included literature - a copy of everything I've been able to find regarding
the SD9000 cassette deck over the past decade or so. Unfortunately, it
specifies the two-speed unit as opposed to the DBX variation, however, the
lions share of information is perfectly applicable.
Replaced parts. The old belts were also replaced, but they were so decayed
that they had melted and had to be removed with a rag and some rubbing alcohol.
A shot of the power supply/bias oscillator board prior to replacing the old
electrolytic capacitors ("recapping").
The same power supply board after recapping:
The idler assemblies showing the old, dried-out idler tires. When this
happens, rewind and fast-forward malfunctions, and tapes start to get "eaten".
Replacement rubber and optocouplers:
Old, dead optocouplers (the black U-shaped devices). When these go, the
deck plays for 2 seconds, then stops.
Newly installed optocouplers. With the modern advances in infrared LEDs,
these should be good for at least another 30 years!
All idler tires and belts replaced with new
Defective optical couplers replaced with new
Motor and solenoid drive transistors replaced with new
All heat sink-mounted power transistors removed, cleaned, and remounted
with fresh thermal compound
Transport disassembled, cleaned, re-lubed and reassembled (top-quality
silicone grease and synthetic lubricant used)
Signal to Noise Ratio:
don't have the Marantz spec for this, but DBX SNRs usually range from 75-82 dB
Noise Reduction Off: 59 dB
Dimensions (W x H x D):
16-3/8" x 5-3/4" x 11-5/8"
22 lbs., 1 oz. (10 kg)
Additional specifications available upon request
If you are not 100% satisfied with this unit, you may return it within 14
days of receipt for a full refund of your purchase price and original
outbound shipping (yes, return shipping would be your responsibility). Full
refund would of course be contingent upon receiving the returned unit in the
same condition in which it was sent, without any missing or exchanged parts.
As most failure-prone parts in this deck have already been replaced, I
have no problem offering a full 90-day warranty on this
unit. Should you have any problems within 90 days of receiving this
item, I will repair it free of charge, including parts and labor, provided
you handle round-trip shipping.
Due to guidelines, I accept only PayPal payment. Buyer pays fixed
FedEx Ground shipping rate of $39.00, which includes
shipping insurance and absolutely bulletproof packaging, for any
destination in the continental US. I will ship internationally, but I will
not provide rate estimates prior to sale end. The packaged deck
will weigh 30 lbs., the package dimensions will be 20" x 19" x 15" - you can
obtain your own international rate quote from your carrier of choice.
I do not "pad" shipping charges, and will honor any confirmed legitimate
Buyer MUST respond within 3 days of the sale end or transaction will
be void. Payment MUST be received within 10 days of the end of the sale
or the transaction will be void. I reserve the right to cancel offers from any
party with a response rating at or below zero, or any party with excessive
negative response. Good luck and happy offerding!