Revox - A700 / A720 / A722 Hi-fi set - Multiple models

Set of three beautiful vintage collector’s pieces, reviewed by qualified technicians and working very well for their age, consisting of a Studer A700 reel-to-reel tape recorder, an A720 preamplifier, and an A722 power amplifier, plus extras: two Revox reels, one with new tape recorded in Revox cases, two Nab’s Revox, two Philips interconnection cables, four original Studer A-700 booklets, and two speaker cables.

Marks of age inherent wear (see photos)

The Studer Revox A700 is a high-end reel-to-reel tape recorder, manufactured between 1973 and 1982, known for integrating professional-grade components in a sophisticated domestic design.

Audio and Performance Specifications;
According to the service manual and ReelToReel data, the device offers:
Tape speeds: 3.75 ips (9.5 cm/s), 7.5 ips (19 cm/s), and 15 ips (38 cm/s).
Frequency response (at 15 ips): 30 Hz to 22,000 Hz (+2/-3 dB).
Signal-to-noise ratio: 65 dB (at 15 ips) and 66 dB (at 7.5 ips).
Wow and flutter: 0.06% at 15 ips; 0.08% at 7.5 ips.
Total Harmonic Distortion (THD): 0.6%.

Mechanism and Components
The system uses a servo-controlled three-motor AC configuration, with a quartz clock to stabilize the capstan motor speed.

Heads: 3 heads (erase, record, playback).
Reel size: Supports reels up to 10.5 inches (26.5 cm).
Semiconductors: Extensively uses integrated circuits (16 to 19 ICs, depending on revision), 2 LSI chips and more than 90 transistors.
Equalization: NAB standard (some variants IEC).

Dimensions and Construction
As listed by Premium-Hifi and audioG, the unit has the following physical characteristics:
Dimensions: Approximately 48.3 cm wide, 46.2 cm high, and 17.5 cm to 22.5 cm deep.
Weight: About 24 kg.
Power: 110V to 240V selectable, with 130 W consumption.
Versatility: Can be operated in horizontal, vertical, or tilted position.

Inputs and Outputs
Inputs: 2 microphones (0.15 mV), Phono (2.5 mV), Radio (3 mV) and 2 Aux (40 mV).
Outputs: Line (1.55 V), DIN (0.775 V) and headphone output (max. 4.9 V).

Revox Digital FM Tuner Preamplifier A 720.
Operation is perfect. It has been fully serviced.

Specifications:
Frequency response: 20 Hz to 20 kHz
Total harmonic distortion: 0.005%
Input sensitivity: 3 mV (MM), 100 mV (line)
Signal-to-noise ratio: 65 dB (MM), 85 dB (line)
Output: 200 mV (line), 1.5 V (pre-out)
Semiconductors: 37 x ICs, 41 x transistors, 63 x diodes
Dimensions: 483 x 151 x 328 mm
Weight: 12 kg

The Revox A722 is a classic hi-fi power amplifier, manufactured between 1973 and 1977 by Willi Studer in Switzerland and the Black Forest.

REVOX A722 STEREO POWER AMPLIFIER
Condition;
Technically pristine
Fully functional
Excellent condition (see photo)

Technical specifications:
Manufacturer: Revox
Model: A 722
Type: Power amplifier
Years of manufacture: 1974 - 1980
Made in Switzerland

Power (RMS): 2 x 60 W into 4 ohms / 2 x 45 W into 8 ohms
Music power: 2 x 90 W into 4 ohms
Damping factor: > 40 (into 4 ohms)
Frequency response: 20 Hz to 20 kHz (+/- 1 dB)
Total harmonic distortion: < 0.1% (up to nominal power)
Sensitivity: 1.55 V (+6 dBu) for maximum power
Weight: approx. 8.5 kg
Dimensions (W x H x D): 318 x 150 x 241 mm

2. FUNCTIONS

Power limiter: Limits output power to 20% or 50% to protect the speakers.
Remote operation: Remote power control via Series 700 control cables (e.g., A720).
Protection: Turn-on delay and thermal overload protection.
Indicators: “Power” and “Overload” indicator lights.

It was designed as the perfect companion to the legendary Series 700 – especially for the digital tuner preamplifier A720 and the A700 tape recorder.
To this day, it is regarded as an excellent example of Swiss precision engineering: exceptionally durable, easy to repair, and sonically neutral.
Power Limitation: Output power can be reduced to 20% or 50% via front panel buttons – a clever protection for smaller or sensitive speakers.
Protection Circuits: The amplifier features a turn-on delay (to avoid popping in speakers) and electronic overload protection.
Cooling: It has a temperature-controlled fan, which, however, is almost never activated in normal home use.

The seller does not accept returns on this item

The set will be packed in two properly padded double cartons.

Shipping cost will be budgeted afterward depending on speed and insured shipping.