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

Set of three beautiful collector's components 'vintage' with 52 years, inspected by qualified technicians and functioning very well for their age, consisting of Studer A700 tape recorder, the A720 preamplifier and the A 722 power amplifier, plus extras; two Revox spools, one with new tape recorded in Revox boxes, two Revox Nab’s, two Philips link cables, four original Studer A-700 pamphlets and two speaker cables.

Marks of use inherent to age (see photos)

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

Audio and Performance Specifications;
According to the service manual and technical data from ReelToReel, 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 three‑motor AC servo‑controlled setup, with a quartz clock to stabilize the capstan motor speed.

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

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 to 22.5 cm deep.
Weight: About 24 kg.
Power: 110V to 240V selectable, consumption 130 W.
Versatility: Can be operated in horizontal, vertical or angled 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 overhauled.

Specifications:
Frequency response: 20 Hz to 20 kHz
Total harmonic distortion: 0.005%
Input sensitivity: 3 mV (MM), 100 mV (line)
Signal-to-noise: 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 cosmetic 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 at 4 ohms / 2 x 45 W at 8 ohms
Music power: 2 x 90 W at 4 ohms
Damping factor: > 40 (at 4 ohms)
Frequency response: 20 Hz to 20 kHz (+/- 1 dB)
Total harmonic distortion: < 0.1% (to rated power)
Input 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 control of the power supply via the 700 Series control cables (e.g., A720).
Protection: Delay at start and thermal overload protection.
Indicators: “Power” and “Overload” indicator lights.

It was designed as the perfect companion to the legendary 700 Series – especially for the digital tuner preamp A720 and the tape recorder A700.
To this day, it is considered an excellent example of Swiss precision engineering: extremely 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 start‑up delay (to avoid popping in speakers) and electronic overload protection.
Cooling: It has a temperature‑controlled fan, which, however, is almost never activated during normal home use.

The seller does not accept returns on this item

The set will be packed in two double cases properly secured.

Shipping price will be quoted afterward depending on speed and insurance.