The acoustically crucial voltage gain stage was outsourced from the N-CORE module and designed as a separate circuit. The use of an excellent J-FET amplifier and an absolutely pure energy supply with less than 1 µV of noise floor results in an almost perfect analog amplification of the input signal with no negative impact caused by class-D amplifier interference. The N-CORE module is used quasi as a power buffer to supply the already amplified input voltage with the necessary current required for running loudspeakers. The N-CORE modules impress with great transparency and totally frequency-independent parameters. A perfect team with an awesome sound potential.
The signal detector, which is in charge of turning the amplifier on and off, has been revised: its sensitivity has been increased and its robustness against interferences reduced at the same time by the use of a fully balanced circuitry. The signal detector now works in the left channel only and thus has the same sensitivity in both operation modes (stereo and bi-amping). All in all a significant plus in operational safety.
Specifications
- Measurement conditions: 22 °C, 230 V mains voltage
- Audio Precision AP2722
- Mains connection: 90 – 240 V, 50 – 60 Hz
- Power consumption: 0.5 W stand-by, 9 W operation, 660 W max.
- Dimensions (W x H x D): 280 x 220 x 63 mm
- XLR inputs: analog line-level inputs
- Input impedance: 150 kOhms
- Speaker outputs: banana plugs (4 mm)
- Speaker impedance range: 2 – 8 ohms
- Output power: 2 x 250 W @ 4 ohms
- Gain: 25.5 dBTHD: <0,003 %
- Frequency response: 1 Hz – 50 kHz (-3 dB)
- Signal-to-noise ratio: 120 dB
- Protection circuits DC at output: Amp shuts down.
- Must be disconnected from mains and switched on again. LED is permanently on red.Overtemperature: LED flashes red. In case of further temperature rise, the amp is muted until the temperature is back to normal again.Current limiting: Amp is muted. Output current switching threshold: 17.5 A
Reviews
There are no reviews yet.