BOULDER Ultimate
¥ 1,400,000 (around 1990?)
Commentary
A control amplifier developed as Bolder's top-of-the-line model.
The power supply and phono amplifier have an established structure to eliminate mutual interference between circuits.
High-quality parts are used for the circuit and parts to ensure high reliability and sound quality.
Model Rating
| Type | Control amplifier |
| Input impedance | Phono MM : 47k Ω Phono MC : 100 Ω Line : 200k Ω |
| Gain | Phono:68dB Line:11dB |
| Output level | 12V(RMS) |
| THD(2V) | 0.0015% (20 Hz to 20 kHz) 0.0025%(20kHz) |
| Output impedance | Balance : 100 Ω Unbalanced : 50 Ω |
| External dimensions | 1 module : 127 mm wide x 95 mm high x 395 mm deep 2 modules : W 230x H 95x D 395 mm |
| Weight | 10.6kg |