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Revox, one of the most venerated names in analog Reel-To-Reel tape decks, is now marketing the third version of their B77 model, called the MK III. It has many newly designed parts compared with the MK II and is a new build from the ground up, not a refurbished deck.

Revox B77 MK III Reel-To-Reel Tape Deck

The Basics:

Renewed interest in analog tape has been here for a number of years. Revox, one of the most famous names, had been restoring and repairing decks for users, including the original iterations of the B77, which was released in the 1980s. In the 2020’s they decided to build a new deck for those consumers who did not want to deal with repairing or restoring an old deck purchased off of eBay. So, the B77 MK III was born.

Revox B77 MK III Reel-To-Reel Tape Deck Specifications
PRODUCT CATEGORY:

Stereo analog reel-to-reel tape deck

TAPE SPEEDS:

7.5 IPS, 15 IPS

TAPE SPEED ACCURACY:

0.04% at 15 IPS

DISTORTION:

0.24% at 15 IPS

CROSSTALK:

-58 dB

HEADPHONE OUTPUTS:

2

FREQUENCY RESPONSE:

30 Hz – 20 kHz ± 1.5 dB at 15 IPS

WEIGHT:

40 Pounds

MSRP:

$18,995

Company:

Revox

The Rundown:

● Enhanced Electronics: Revox engineers used modern simulations and better components to improve voltage drop and frequency response significantly.

● Precision Heads: The Mk III uses improved, longer-life heads with carefully designed pole pieces and small gaps (0.25 µm for the playback head) for a smoother, straighter response across frequencies.

● Extended Frequency Range: While older models were limited, the Mk III aims to reproduce the full audio spectrum more accurately, especially at 19 cm/s (7.5 ips) and 38 cm/s (15 ips).

● Analog Purity: It remains a true analog device, with no digital chips or software in the signal path, preserving classic sound quality.

The Follow-Up:

The Revox B77 was first introduced in 1979.

Key points about the original Revox B77:

● Era: Late 1970s–early 1980s (B77 MK II last production was 1998.)

● Manufacturer: Studer/Revox (made in Germany)

● Type: ¼-inch, 2-track (and some 4-track consumer versions) analog tape machine

● Speeds: 7½ ips and 15 ips

● Market: High-end home audio, broadcast, and light studio use

The B77 followed the earlier Revox A77 and preceded the PR99, which was more explicitly aimed at professional broadcast environments. The B77 was entirely discrete, using only analog electronics—no digital control or DSP—and is admired today for:

● Robust Swiss mechanical design● Excellent heads and transport stability

● Clean, low-noise electronics for its era

Because of this, the B77 remains highly regarded and collectible, especially among tape enthusiasts and mastering engineers who restore and maintain them.

We recently received the new B77 MK III for review. Initial listening tests indicate that it is certainly befitting of the Revox name regarding sound and build quality.

Previous technical articles on analog magnetic tape include “Analog Tape Recording and Playback Technology: The Principles, Practical Applications, and a Comparison to Digital Audio Recording” and “How Reel-to-Reel Tape Decks Work and My Experiences with Purchasing and Repairs…”

A full review, along with bench tests, will be published on the Secrets website in the coming weeks.