A monaural power amplifier that took a long time to complete without making any compromises, aiming to further improve the quality of music played.
By using a monaural power amplifier, mutual interference between the left and right channels is suppressed, and the weight and size are kept within a range that can be handled by one person.
The circuit configuration is based on active elements with excellent high frequency characteristics, and all amplification stages are symmetrical push-pull. By applying a small amount of NFB, excellent rise characteristics, linearity, and stability are achieved. I am.
This prevents the occurrence of TIM distortion and obtains a low-distortion output even at full power.
In addition, in order to achieve sound quality with less coloration, the capacitor in the NFB loop has been removed and a DC amplifier configuration has been adopted.
The power supply section acquires a large amount of energy of 152 joules by applying a high voltage to a large transformer and a 22,000μFx2 filter capacitor (120 joules for the P-300 type), which significantly improves the low-frequency output characteristics
. has been improved.
The output meter uses a logarithmic compression type that can continuously read 300W from 3mW.
This meter can be switched between peak and volume indications.
Equipped with a subsonic filter to cut unnecessary ultra-low frequency noise.
The volume can be adjusted in 1dB steps up to -20dB, and below that it is equipped with a 25-contact rotary switch with -23dB, -26dB, -30dB, and -∞.
In consideration of its use as a studio monitor or hall PA, it is a 19-inch standard rack mount type, and is also equipped with a Canon input.
A forced air cooling fan (sold separately) can be installed for installation in locations with extremely poor heat dissipation or for continuous use at high output for long periods of time.
Specifications
| Model | monaural power amplifier |
| Rated output (20Hz to 20kHz, distortion rate 0.03% or less) |
450W(4Ω) 300W(8Ω) 150W(16Ω) |
| Total harmonic distortion (20Hz to 20kHz) | 0.03% or less (at rated output) 0.01% or less (at -3dB output) 0.05% or less (at 50mW output) |
| IM distortion rate | 0.01% or less (at rated output) |
| Frequency characteristics (8Ω load) | 20Hz to 20kHz +0 -0.2dB (at rated output) 2Hz to 150kHz +0 -3.0dB (at 1W output) |
| Damping factor (8Ω load) | 120(40Hz) |
| Input sensitivity/impedance | 2.0V/100kΩ |
| S/N ratio (input short, IHF-A) | 115dB (at rated output) |
| subsonic filter | 17Hz, 18dB/octave |
| output meter | Logarithmic compression type Continuous direct reading peak level from -50dB (3mW) to +3dB (600W) , with volume level selector switch |
| Semiconductor used | Transistor: 47 IC: 3 Diode: 51 |
| Power-supply voltage | AC100V/117V/220V/240V, 50Hz/60Hz |
| power consumption | No input: 65W 4Ω load rated output: 800W 8Ω load rated output: 540W |
| External dimensions | Width 482x Height 170x Depth 345mm |
| weight | 27kg |
| Sold separately | Complete set of accessories (with fan) O-81 (¥8,000) |
| remarks | Standard rack (19 inch) can be installed Rack mount pitch: 100 mm (4 inch) Rack inner diameter (horizontal direction): 430 mm (16 15/16 inch) or more |
| Model | monaural power amplifier |
| Rated output (20Hz to 20kHz, distortion rate 0.03% or less) |
450W(4Ω) 300W(8Ω) 150W(16Ω) |
| Total harmonic distortion (20Hz to 20kHz) | 0.03% or less (at rated output) 0.01% or less (at -3dB output) 0.05% or less (at 50mW output) |
| IM distortion rate | 0.01% or less (at rated output) |
| Frequency characteristics (8Ω load) | 20Hz to 20kHz +0 -0.2dB (at rated output) 2Hz to 150kHz +0 -3.0dB (at 1W output) |
| Damping factor (8Ω load) | 120(40Hz) |
| Input sensitivity/impedance | 2.0V/100kΩ |
| S/N ratio (input short, IHF-A) | 115dB (at rated output) |
| subsonic filter | 17Hz, 18dB/octave |
| output meter | Logarithmic compression type Continuous direct reading peak level from -50dB (3mW) to +3dB (600W) , with volume level selector switch |
| Semiconductor used | Transistor: 47 IC: 3 Diode: 51 |
| Power-supply voltage | AC100V/117V/220V/240V, 50Hz/60Hz |
| power consumption | No input: 65W 4Ω load rated output: 800W 8Ω load rated output: 540W |
| External dimensions | Width 482x Height 170x Depth 345mm |
| weight | 27kg |
| Sold separately | Complete set of accessories (with fan) O-81 (¥8,000) |
| remarks | Standard rack (19 inch) can be installed Rack mount pitch: 100 mm (4 inch) Rack inner diameter (horizontal direction): 430 mm (16 15/16 inch) or more |
https://audio-heritage.jp/ACCUPHASE/amp/m-60.html
