Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:USA
Release dates:1966 - 1969
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:(all 3 dB): 7½ ips: 40Hz -18kHz
Wow and Flutter:0.2% at 7½ ips & 0.25% at 3¾ ips
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The RK-675 was a hybrid unit using transistors in the preamp section and valves in the
amplifiers. The deck was driven by a heavy-duty 4-pole capacitor-start motor.
This was a quarter-track stereo recorder featuring auto shut-off, sound on sound,
two 6″ x 4″ speakers with “side-flap” reflectors,
push-button transport controls and came supplied with two dynamic microphones. Price when new was $159.95.
Lafayette also marketed the same machine in a fancy teak veneered cabinet
and majestically dubbed it “The Criterion 1000B” with a $US189.95 price tag.
Eager to cover all bases, a
tape-deck-only version as the RK-650 for $109.00.
Valve complement: 2 x 12AT7 (AF amp), 2 x 6BQ5 (output) 2 x 12AU7 (bias osc & AF amp) 4 semiconductors / Rewind speed: 3 minutes for 1200ft tape / Audio output power: 3 watts per channel / Inputs: 2 microphone, 2 phono / tuner / Outputs: 2 audio, 2 monitor / Speaker(s): 6″ x 4″ oval speaker per channel / Dimensions: 17 x 12 x 7″ (432 x 311 x 178 mm) / Weight: 37 lbs (16.8 kg) / quarter-track stereo