Carver 4000T (1977)
Little is documented about the Carver 4000T. The record shows a solid-state preamplifier, one of Bob Carver's more ambitious control consoles, loaded with switchable sound-enhancement systems: Sonic Holography, surround sound, an auto correlator, and a "digital time lens." The archive dates it to 1977, though exact production dates aren't pinned down in the sources on hand.
Carver's own advertising in HiFI-Stereo (January 1987, p.142) explained Sonic Holography as creating a third set of sound arrivals that cancel the objectionable second arrival, leaving only the original sound. The idea was to expand the image from just two front speakers. But Audio (October 1985, p.54) found that beneath all those buttons and knobs was first and foremost one of the finest audio preamplifiers of its day, a "straight-wire" design dedicated to amplifying real-world musical signals without distortion.
The phono section drew specific praise. It let you match virtually any cartridge to an ultra-sensitive phono pre-preamplifier stage, with capacitance matching to the cartridge and cable load. The review text also noted that the 4000T's metal parts were precision machined rather than stamped. Known specs are thin but real:
- Frequency response: 1.5 Hz – 60 kHz (0, −3 dB)
- THD: 0.05% · IHF IM: 0.003% · T.I.M. also listed
One owner in the record ran a 4000T ahead of a Carver 1.0t amplifier, with a Denon DP-37F turntable and a Grado MC+ moving-magnet cartridge. A single Audiogon listing is the most complete surviving source for the model in the field. It was listed with the original box, manual, and packing pads, in full working condition and recently checked and upgraded by Hi Tech Audio of Gresham, Oregon. The seller called it a complete instrument for the enjoyment of music, and said it still held a place among the purest preamps on the market.
Market Value
┌──────────────────────────────────────────────────────────────────────────┐ │ CARVER 4000T Nov 2026 │ ├──────────────────────────────────────────────────────────────────────────┤ │ High $655 Latest $450 │ │ Median $431 Trend — │ │ Low $316 Volume ~1/mo │ ├──────────────────────────────────────────────────────────────────────────┤ │ $700 ┤ │ │ │. │ │ │ │ │ $529 ┤ │ │ │. │ │ │ . .│ │ │ . . │ │ $300 ┤ . │ │ ├─────────────────────────────────────────────────────────────────│ │ vol │█ ▄ ▄ ▄ ▄ ▄│ │ └─────────────────────────────────────────────────────────────────│ │ 2026-02 2026-05 2026-07│ └──────────────────────────────────────────────────────────────────────────┘
eBay completed sales. Excludes accessories, parts, and non-working units. Hover points for details.
eBay Listings
Recently sold on eBay: $395–$475 (median $431, based on 7 completed sales, past 12 months)
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