The Vox Domino Reverb, a version of the Domino Standard combo, is perhaps the least well known model in the Domino range. Produced from late 1963 to mid 1964, the Reverb combo evidently did not fare all that well in terms of sales. By the time of the Russell Hotel Trade Fair in late August 1964 it was gone, replaced by a new piggy-back version in green and silver livery.

An overview of the range as a whole and notes on contemporary prices can be found here. The page on the Domino Standard/Normal combo is here.

Below, a rare listing for the Domino Reverb in an updated pricelist printed for "Musicland", the Jennings shop in Bexleyheath, in early Spring 1964.

Spring 1964, updated pricelist for "Musicland". It is worth noting that the model does not appear in the JMI pricelist of February 1964.

The main circuit of the Domino Reverb was effectively that of the AC4 - single channel, two inputs, tremolo - but with reverb worked in as first stage. The four controls are: reverb depth; volume; tremolo speed; and combined on/off and tone. The circuit diagram is OS/037, drawn by Mike Turner on the 7th October, 1963. A single copy only is known to survive.

Information panel of the circuit diagram, dated 7th October 1963.

Control panel of a Domino Reverb combo.

It may be that along with Domino Standard/Normal combos the earliest amps had blue panels:

Domino Standard/Normal serial number 1047.

Five valves were employed: EZ80 rectifier, EF86 preamp gain, an ECC83 for the tremolo, an ECC83 for the reverb, and a single EL84 power valve. The mains tranformer allowed for operation at 110V and 230V, indicating that sales to America may initially have been an intention or at least hope.

Detail of the reverb tank, single spring, in general arrangement much as the ones used from late 1966 in for the Vox solid state amps.

As in the case of the other Domino models, chassis were produced for JMI under contract by Triumph Electronics in Purley. The standard "L-shaped" assembly used for the Domino Normal and Bass and the AC4 had to be redesigned however to accommodate support for the reverb tank. Valves were arranged in line above the tagboard. Graham Huggett, the "metal bender" at Triumph, will have made up the bare chassis in batches as required, separate from the other Dominos.

The lip at front provided the means for supporting the reverb tank.

Speakers were generally bronze-coloured Plessey 1010, impedance 3 ohms. Cabinets had a closed back, giving more protection to the driver than cabinets with upper and lower back boards (as for example in the case for the AC4).

.

Serial number plates had "AMPLIFIER" at their head rather than "VOX AMPLIFIER". The three main types that were used for the range can be seen on this page.

Late 1964

In late 1964 the Domino Reverb combo was merged with the Domino Super Reverb to form a new type of "piggy-back" amplifier, issued in the new green and silver livery:

Detail from the "Precision in Sound" newspaper-format catalogue printed in September 1964.

Four controls were provided: Reverb, Volume, Vibrato Speed, and combined Tone and On/Off. Although few examples of this new-style Domino Reverb have come to light so far, it is clear from survivors that a few hundred were made:

Domino Reverb (piggy-back), serial number 3329.

Below, a new-style Domino Reverb chassis in an AC10 speaker cabinet. The amp did the rounds on ebay for around a year before being bought in by a dealer and resold.

Controls are: Reverb, Volume, Vibrato, and combined Tone and On/Off.

The cut-out in the top of the cabinet seems to be fairly rough and ready.

Surviving amps

Below, pictures of a cross-section of surviving amps. The serial numbers that have come to light so far lie in the 1000 range.

Serial number 1635

Reverb tank removed. In the preamp Mullard mustard capacitors with "A3N" and "B3N" date codes = first and second quarters of 1963 for their manufacture.

Serial number 3329

Sold by Russell Acott, Oxford. Pictures of the exterior of the amp and speaker cabinet can be seen above.

Serial number 3576

Amplifier section serial number 3576 paired with a Domino Bass cabinet (single 12" speaker added in the USA).

Serial number 3607

Domino Reverb serial number 3607 with its original speaker cabinet and speakers: Celestion 10" drivers, budget model, small magnets, model number beginning "7", so perhaps part of the [CT]7722 range. One has the date code "19GK" = 19th July 1965 for its manufacture.

.