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Sound Rating: 6 / 10 # Owners: 1
Relaibility Rating: 6 / 10 Views: 192

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Technical Details

Brand: Geloso




Electronics:Solid State

Country of Manufacture:Italy

Release dates:1968 - 1971

Tracks:1/2 Rec/PB

Speeds: 1 7/8, 3 3/4

Max Reel Size("): 7"

Number of heads: 2

Head Composition: Permalloy

Head Configuration: dual-track-mono

# Motors: 1

Auto Reverse?:No

Voltage(s): 220-240v

Frequency Response:40Hz - 12kHz at 3¾ ips

Wow and Flutter:0.2% at 3¾ ips

Signal-to-Noise Ratio:50dB

Sound quality rating:6 / 10

Long-term reliability rating: 6/ 10

Additional Details


The G651 was the last open reel recorder made by Geloso and Magnetofoni Castelli (the Castelli S4000 being identical to the G651). It was a half-track mono machine with a maximum reel size of 5″ and two speeds, 3¾ & (1 7/8 ips.

The recorder could be powered from AC 100 to 240V 50/60Hz), a 12V power supply or eight 1.5 volt “D” size batteries (giving up to 24 hours of non-stop playing time).

Controls consisted of 5 push-buttons: Record – Play – Stop – FFW – Rewind. Whilst these push buttons had lost their bright colours that were so much a part of previous Geloso styling (in favour of the ‘new’ silver look), there were small colour coded strips situated below the buttons to retain the tradition.

The speed selector had three positions: 9.5 (3¾ ips), – Riposo (Rest – which released all of the idler wheels to prevent tire printing) and 4.75 (1 7/8 ips). There were two knobs, the first was the treble / record level control and the AC mains on-off / volume control.

A small VU meter with a green and red scale had a dual function. On playback the pointer would indicate (in the red section) the charge of battery and in record it operated as a regular VU meter.

Inputs were provided in the form of a DIN socket for mike and remote and there was an output for an external loudspeaker, headphones or amplifier plus a multi-pin connector (4 pins) for mains power supply which disconnected the internal battery pack.

After the G651, Geloso produced cassette recorders only.

Additional Info

1968 – 1974
Price when new (in Italy)
49,500 Lira
Track system
half-track mono
Maximum reel size
Tape speeds
3¾ & 1 ips
Frequency response
40Hz – 12kHz at 3¾ ips
Wow & flutter
0.2% at 3¾ ips
Signal to noise ratio
Fast wind speed
about 1½ minutes for a 360 meter (1200 feet) reel
Audio output power
1.5 watts
microphone (0.15mV, impedance 6.8K ohm)
internal elliptical
11.7 lbs (5.3 kg)
13 × 10¼ × 5½ ” (330 × 260 × 140 mm)


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