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| DB SYSTEMS DB-1/DB-2 |
212,500yen(one-set, around the 1978 time)
198,000yen(one-set, around the 1979 time) |
Control amplifier which the David Hadaway designed and was named "The Essential Preamp".
Control amplifier DB-1 has structure which the power-source part separated,
and it has the composition of having united control main part part DB-1
(157,000yen) and power-source part DB-2 (41,000yen).
Pursuing the basic engine performance of a preamplifier
thoroughly, the circuit has the composition with cascode amplifier of not using
the differential amplifier or complimentary system, either.
The wood
case is attached to DB-1 which is a control main part.
There are DB-3
crossover, DB-4 head amplifier, and DB-5 tone control as an option, and it has
become the design which can share these 3 models and power-source part DB-2.
|
| Form |
Control amplifier |
| THD |
0.0003%(1kHz)
0.0008% or less (20Hz -
20kHz, output 3V) |
Phono input
(It is IHF-A to a 10mV
input) |
1V(20kHz)
100mV(1kHz)
10mV(20hz)
|
| Signal to noise ratio (IHF-A) |
Phono: 89dB (input short-circuit, 10mV
input)
83dB (cartridge mounting, 0.65Hz, 650ohms)
74dB (input opening)
High level: 90dB (input short-circuit, 1V output) |
| Maximum except take-off |
6V (10kohm load) |
| Input sensitivity (at the time of 1V output)
|
Phono:2mV
High level: 120mV
|
| Phone maximum permissible input |
160mV(1kHz) |
| Filter |
A low cut (only Phono): 20Hz/36 Hz, 6
dB/oct.
A high cut: 5kHz/10 kHz, 6 dB/oct. |
| Power source |
AC100V, 50Hz/60Hz |
| Dimensions |
Main part: Width 216x height 81x depth of
178mm
Power-source part: Width 160x height 81x depth of 107mm
|
| Weight |
Main part: 1.2kg
Power-source part: 1kg
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| Attachment |
Wooden case |
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