MIRAD A2000
¥ 570,000 (released in July 2007)
Commentary
As the second series of vacuum tube amplifiers, this is a low-cost stereo amplifier based on the concept of the SRA-M20.
The output power of 35W is obtained by operating EL34 in UL push-pull.
In addition, the drive circuit employs a direct-coupled differential circuit with independent right and left stabilizing power supplies, and by making fine adjustments exclusive to the A2000, low distortion and low crosstalk are achieved.
By supplying a large power supply to the power stage, low noise and large current supply capability are secured.
The chassis front and rear panels are made of thick aluminum plates, which are machined by machining centers, and each part is combined in a rational way to increase rigidity and reduce cost.
We often use the same parts as the SRA-M20 for the parts that affect sound quality.
Model Rating
| Type | Tube type pre-main amplifier |
| Circuit system | EL34UL Connection Push-Pull Fixed bias system Two stage differential direct-coupled drive circuit |
| Output (both channel operation) | 35W + 35W (4 Ω) 25W + 25W (8 Ω) |
| Input | Line : Route 3 (RCA) Selector with input OFF position |
| Input sensitivity | 500 mv (input required for 35W, 4 Ω) |
| Input impedance | 5k Ω |
| Output bandwidth | 30 Hz ~ 25 kHz ± 1 dB (8W) |
| Distortion factor | 0.5% or Less (8W, 1 kHz) 0.2% or Less (1W, 1 kHz) |
| Damping factor | Approximately 3.2 (8 Ω) |
| Residual noise | -67dB or less (no weight) |
| Vacuum tube used | ECC81x2 ECC82x2 EL34x4 |
| Pwer | 100 VAC, 50Hz/60Hz |
| Fuse capacity | 5AT |
| Power consumption | 140W(PSE) |
| External dimensions | Width 390x Height 180x Depth 280 mm (excluding projections) Width 390x Height 180x Depth 315 mm (including projections) |
| Weight | Approx. 20 kg |