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:(±3 dB): 7½ ips: 30Hz - 18kHz
Wow and Flutter:less than 0.2 % at at 7½ ips
Signal-to-Noise Ratio:better than 45dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
A compact four-track stereo
tape recorder from the Roberts company from around 1966 with two speeds (7½ & 3¾ ips), two heads, 7″ maximum reel capacity, inbuilt stereo amplifier and 5″ x 7″ extended range speakers.
Other features included a single motor,
pause control, two
VU meters, automatic tape shut
off, sound-with-sound and 3-way speaker switch.
Model 1651 was identical to the 1650 except that the speakers were in detachable, hinged enclosures.
Prices when new:
Model 1650 – $299.95
Model 1651 – $329.95
Channel separation: -55dB / Audio output power: 2.5 watts per channel / Inputs: 2 microphone 2 radio / phono / Speaker(s): two built in 5″ x 7″ speakers / Dimensions: 16¼ x 7½ x 13¾” (413 x 191 x 349 mm) / quarter-track stereo