Acoustat 2

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General information[contribute]

The Acoustat 2 is an electrostatic speaker. It is part of the Mk-121 series. It was manufactured from 1980 to 1981. In 1980 its price was $1200.

Jim Hecker (February 2001): I currently own a pair of Acoustat 2s and am very impressed with the amount and quality of information on your site. I would like to post a comment. I have seen several requests for information on your site about what type of amplifiers to use to drive these speakers.

Before I owned the 2s, I owned a pair of Acoustat 3s. I obtained these from a classified ad I saw in the Washington Post newspaper. When I visited the owner at his home in Arlington, Virginia, it was Lew Johnson, the co-founder of Conrad-Johnson. I learned that he had used the Acoustat 3s to design his Premier One amplifier, the prototype of which I saw in the corner of his room.

Since that time, I have used a C-J MV75A-1 to drive both the 3s and 2s, with excellent results. This amp is about the same vintage as the Premier One, and therefore probably shares the design characteristics that Johnson was using at the time he had the Acoustat 3s.

Andy Szabo (March 2001): The folks at Conrad Johnson and Jim Strickland of Acoustat were good friends, and they would often spend hours on the phone, "talking tech". I know they conferred quite a bit when CJ was developing MOSFET output amplifiers. Those amplifiers used the same Hitachi MOSFETS used by Acoustat and Hafler. Acoustat and CJ even helped each other out when the Hitachi's were in scarce supply, by sharing excess inventory.

And yes, Acoustats were usually CJ's speaker of choice when auditioning new designs. Besides being very popular with home audiophiles, Acoustats were used extensively by other audio manufacturers as reference equipment. Acoustats also found their way into recording studios, nightclubs (Model 8's!), and even some industrial and scientific applications totally unrelated to music reproduction.

Roy Davis (February 21, 2009): I have just sold my beloved Quad ESL2905 and purchased an elderly pair of Acoustat 2 plus 2 with Medallion transformers. Both speakers share the typical panel openess. However, where they differ is that the Quad presents a smoother reproductin but this may not necessarily be natural. With Acoustats I notice that I can hear, what I think is a natural, rasp to some male voices that the Quads smoothed over. In addition the presentation of the Acoustat seems to have more presence, drive and weight. The Acoustat also presents a 'bigger' performance which is more lifelike especially on orchestral works.

Angelo (September 17, 2009): I currently own a pair of Acoustat Model 2. I bought this loudspeakers more than 20 years ago, and I still satisfied of its. During this period I have changed a lot of amplifiers and last year I was impressed by an Italian one : Aloia ST 240. This Amplifier was distributed in the world with the name Aloia ST 260. In Italy of course is easy to buy used at a good price : about 850 Euro (1.000 $). Now my next step is to upgrade the interface mk 121-2.

Related models

The following models were also produced in the Mk-121 series:

Acoustat 1 plus 1
Acoustat 2 plus 2
Acoustat 3
Acoustat 4
Acoustat 6
Acoustat 8


2, several modifications (by Ed Houston)

Forum topics on the Acoustat 2

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