DB SYSTEMS DB-1/DB-2
¥ 212,500 (1 set, around 1978)
¥ 198,000 (1 set, around 1979)
Commentary
A control amplifier designed by David Hadaway and named "The Essential Preamp".
The control amplifier DB-1 has a structure in which the power supply part is separated, and the control body DB-1 (¥ 157,000) and the power supply part DB-2 (¥ 41,000) are combined.
The basic functions of the preamp are thoroughly pursued, and the circuit is composed of a cascode amplifier without using any differential amplifier or complimentary service method.
A wood case is attached to the control body DB-1.
DB-3 Crossover, DB-4 Head Amplifier and DB-5 Tone Control are sold separately. These three models are designed to share the DB-2 power supply.
Model Rating
Type | Control amplifier |
Total harmonic distortion factor | 0.0003%(1kHz) 0.0008% or Less (20 Hz to 20 kHz, Output 3 V) |
Phono input (IHF-A for 10 mV input) |
1V(20kHz) 100mV(1kHz) 10mV(20hz) |
Signal-to-noise ratio (IHF-A) | Phono : 89 dB (input short-circuit, 10 mV input) 83 dB (cartridge mounted, 0.65 Hz, 650 Ω) 74 dB (Input Open) High level : 90 dB (input short, 1 V output) |
Maximum power output | 6 v (10k Ω Load) |
Input sensitivity (at 1 V output) | Phono:2mV High level : 120 mV |
Phono maximum allowable input | 160mV(1kHz) |
Filter | Low-cut (Phono only) : 20Hz/36Hz, 6dB/oct. High Cut : 5kHz/10kHz, 6dB/oct. |
Pwer | 100 VAC, 50Hz/60Hz |
External dimensions | Body : Width 216x Height 81x Depth 178 mm Power Supply : W 160x H 81x D 107 mm |
Weight | Body : 1.2 kg Power Supply : 1 kg |
Attachment | Wooden case |