Country of Manufacture:Germany
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Mono - Dual Track
Frequency Response:7½ ips: 30Hz - 18kHz; 3¾ ips: 40Hz - 15kHz
Wow and Flutter:less than 0.15 % at 7½ ips; less than 0.25 % at 3¾ ips
Signal-to-Noise Ratio:200Hz/12 KHz, better than 50 db
Sound quality rating:9 / 10
Long-term reliability rating: 10 / 10
The M24 was an improved version of the 1959 M23 model. It was a professional quality recorder costing over £180 in the UK and many found their way into radio, television and recording studios. The transport was operated by solenoid “touch” controls and there were four mixable inputs; microphone, radio, turntable and line. Three motors and three heads were employed, and reels of up to to 9″ diameter could be used. The head assembly was removeable and interchangeable. Various versions were available: deck only, portable carry-case with amp and speaker or this de luxe version with two speakers.
I bought my M24 for AU$50 in 1987 from a chap who repaired Quad electrostatic speakers in a basement and after a few electronic repairs it worked beautifully. The bass and treble control plus the 6 watt power amp driving two high quality elliptical speakers gives a wonderfully warm sound. The brakes have ceramic drums and the whole machine is a beautiful example of West German precision engineering.
Distortion at full modulation
|less than 3% at 7½ ips; less than 5% at 3¾ ips|
|8 x ECC81 (12AT7); 2 x EL95; 2 x EC92|
Audio output power
|four channel mixer – mic, radio, pick up & tape|
|two Goodmans elliptical speakers|
|20½ x 20¾ x 10½” (520 x 530 x 270 mm)|
|68 lbs (31 kg)|