Country of Manufacture:United Kingdom
Speeds: 3 3/4, 7 1/2, 15
Max Reel Size("): 10.5"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Stereo
Frequency Response:( 3dB): 15 ips: 30Hz - 20kH 7½ ips: 30Hz-17kHz 3¾ ips: 40Hz -14kHz
Wow and Flutter:less than 0.08% at 15 ips, less than 0.10% at 7½ ips
Signal-to-Noise Ratio:better than 60dB (unweighted, including hum) ref. 2% distortion
Sound quality rating:7 / 10
Long-term reliability rating: 4 / 10
It was the Japanese who introduced the concept of vertical operation, and fired the imagination
of the average enthusiast, these looked more professional, and were bought because of their looks as much as anything else.
Ferrograph were slow to respond to this challenge, when they did it was too little too late. The introduction of the Series 7 in the late 1960’s was ill conceived, and poorly implemented.
The later Super Seven tried to address some of the shortcomings, but it was too late to repair their damaged reputation. Enthusiasts who had always been loyal to Ferrograph moved their allegiance to Revox, Tandberg,
Sony, Teac, and Akai.
Channel separation: better than 50db / Distortion: less than 0.25% / Rewind speed: approx 2 min for 1800ft, 3 min for 3600ft / Audio output power: 10 watts RMS per channel into 8 ohms / Inputs: microphone: 200µV – 50mV, 200 – 1000 ohms line: 50mV – 7V at 2 Mohm / Outputs: 300mV into 10kohm line, Stereo phones & extension speakers / Dimensions: 20½ x, 17½ x 10″ (521 x 444.5 x 254mm) / Weight: 58 lbs (26kg) / half and quarter-track stereo versions available