ONLIFE Research U-22
Black : ¥ 135,200 (released in 1976)
¥ 158,000 (around the late 1970 s?)
White : ¥ 113,000 (released in 1976)
Commentary
This tube type preamplifier was completed after approximately one and a half years of planning and one year of development.
There are two versions, black and white. Only black uses a P-type custom attenuator and coupling capacitor.
The use of a simple circuit structure eliminates factors that cause sound quality degradation.
The power supply unit and amplifier unit can be removed from each block by plug-in for easy inspection during rack-mounting.
The CR type tone control reduces the deterioration of sound quality.
All parts, such as vacuum tubes, capacitors, resistors, switches, etc., are made of quality controlled superior parts.
All vacuum tubes are made by Telefunken, and rotary switches use Siemens type, metal film resistor made by Philips, etc.
Equipped with a large VU meter.
Model Rating
Type | Control amplifier |
Frequency characteristic | 32 Hz to 32 kHz ± 0.5 dB |
RIAA deviation | 30 Hz to 15 kHz ± 0.5 dB |
Input Sensitivity / Impedance | Phono : 1.8mV/47k Ω Aux, Tuner, Tape : 88mV/120k Ω |
Signal-to-noise ratio | Phono : 60 dB (open), 75 dB (shunt) Aux : 75 dB (open, shunt) |
Phono allowed input | 400mV |
Distortion factor (at rated input) | Phono:0.4%(to Pre out) Aux:0.3%(to Pre out) |
Output | 22 v (non-clip) |
Tone control | CR Type |
Input / output terminal | Phono : Route 3 Aux : 2 routes Tuner : one line Tape : 1 system Pre-out : 2 routes |
Gain | Phono:55dB Aux, Tuner : 21 dB |
Vacuum tube used | ECC83 : 4 Pieces ECC82 : 2 pieces |
Pwer | AC100V |
Power consumption | 45W |
External dimensions | Width 440x Height 150x Depth 265 mm |
Weight | 7.2kg |