Big, fan-free Class AB power with a robust bottom end – for large passive studio monitors. The Avantone Pro CLA-400 Studio Reference Amplifier is a 3U Class AB power amplifier with a classic bipolar transistor design, VU-style meters, Japanese components and a toroidal linear power supply. It was designed for CLA-10 monitors and works with most demanding speaker loads.
Why customers choose it
- Lots of headroom: 360 W per channel into 8 ohms, 540 W into 4 ohms, 760 W bridged into 8 ohms.
- Robust bottom end: classic bipolar transistor output design.
- Silent: convection cooled – no fan noise in the control room.
- Clean sound: THD and intermodulation distortion under 0.1%, damping factor 250, S/N over 103 dB (A-weighted).
- Flexible: three modes (Stereo, Parallel (one input to both outputs) and Bridged Mono), balanced inputs and a link output; protection circuits disconnect the speakers on overheating, short circuit or DC at the output.
Who it is for
Professional studios, mastering rooms and post facilities running medium-to-large passive monitors, and engineers who want maximum headroom with no fan noise.
Specifications
| Amplifier | Class AB (bipolar), 2 channels, convection cooled |
|---|---|
| Power (8 ohms, stereo) | 360 W per channel |
| Power (4 ohms, stereo) | 540 W per channel |
| Power (bridged, 8 ohms) | 760 W |
| Frequency response | 20 Hz – 20 kHz (+/- 0.5 dB) |
| THD (1 kHz) | Under 0.1% |
| S/N ratio | Over 103 dB (A-weighted) |
| Damping factor | 250 (100 Hz, 8 ohms) |
| Slew rate | 28 V/us |
| Input sensitivity | 0.775 V (0 dBu) |
| Input impedance | 20 kohm balanced / 10 kohm unbalanced |
| Crosstalk | -70 dB |
| Modes | Stereo, Parallel (one input to both outputs) and Bridged Mono |
| Size | 483 x 133 x 487 mm (3U) |
| Weight | 22.2 kg (49 lb) |
Good to know
- Check the voltage select switch on the rear panel before first power-on (set it for 230 V in India). Standard IEC power inlet with fuse tray.
- Speaker outputs are binding posts – use good speaker cable. Do not change the mode switch with the power on.
- Rack-mountable in a standard 19-inch rack (four front mounting holes). Leave space around the sides and top for cooling air.
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