Class A amplifier circuit design, adopts full balance, full symmetry, differential input to differential BTL (bridge) power output.
Power of the amp circuit can switch high/low voltage automatically.
~110V/~220V power auto switch for the whole machine.
1200W toroidal transformer and up to 180,000uF capacitors.
Perfect amp protecting circuits (short protect/ overheat protect and DC protect)
Class A and Class AB auto (manual) switch.
Class A/ClassB/ClassAB amplifier output modes.
Mechanical chassis design with independent and shield cabinets for power supply and amplifier modules, to keep low interference and high distortion.
SN: 108dB (A weighted, bal input) 115dB (A weighted, unbal input)
THD: 0.008% (1KHz)
Frequency response: 10HZ-100KHZ (+1/-3dB)
Gain: 29.5dB+/-1dB.
Power: 2x300W/CH (8 )
Impedance: 8
Standby power consumption: 1W
Power supply: ~110V/60HZ
~220V/50HZ
N.W: 42KGS
Size: 444x294x449 mm

Scheda tecnica Tonewinner AD-1PRE+

4 Analog inputs: 3 x unbalance (AUX, CD, DVD) 1x balance.
5 digital inputs: OPT1, OPT2, COAX1, COAX2, USB.
Analog outputs: 2x unbalance, 1x balance.
DAC chip: ESS9028Q2M (ESS company, USA).
Digital receive chip: AK4118 ( AKM company).
I/V switch circuit opamp: OPA1632( TI company), and Bal to Unbal switch circuit opamp: OPA1612 ( TI company).
Digital volume chip: MUSES72320 (JRC company).
Analog power supply for the whole unit
Frequency response: 20HZ-150KHZ (+1/-3dB)
SN: 108dB (A weight)
THD: 0.005% (1k HZ)
Power supply: ~110V/60HZ
~220V/50HZ
N.W: 10.1 KGS
Size: 444x108x420 mm