Quad 405

Quad 405

Power Amplifier

 

Power Output:

The amplifier is intended for use with loudspeakers of 4-16 ohms nominal impedance

100Hz any level up to 100 watts <0.01% Dtot

1kHz any level up to 100 watts <0.01% Dtot

10kHz any level up to 100 watts <0.05% Dtot

 

Output Internal Impedance and Offset: 3.3µH in series with 0.03 ohms. Offset <7mV

 

Frequency Response:

Ref. 1kHz. Low frequency -dB at 20 Hz.

Filter attenuation as curve

High frequency: -0.5dB at 20 kHz, -3dB at 50 kHz

 

Signal Input Level:

0.5V rms ±0.5 dB for 100 watts into 8 ohms

Amplifier loads and input by 20kohms in parallel with 50pF

 

Signal Input Slew Rate Limit: 0.1 V/µS

Signal Input Overload: Instantaneous recovery up to +20dB overload

 

Crosstalk (input loaded by 1k ohms):

80dB at 100Hz

70dB at 1kHz

60dB at 10kHz

 

Hum and Noise (input loaded 1k ohms):

'A' weighted - 95dB ref full power

Unweighted (15.7kHz measurement bandwidth) - 90dB ref full power

 

Protection:

The amplifier is suitable for use under the most arduous music conditions and is electrically protected by current limiters; 7 amps in phase current at peak voltage and 3-1/2 amps at zero voltage. Shorting both outputs simultaneously on signal for an extended period (minutes) is not protected

 

Stability: Unconditionally stable with any load and any signal

Power Input: 110-130V or 220-240V, 50-60Hz, 30-350 watts depending on signal level

 

Width: 340.5mm

Height: 115mm

Depth: 195mm (plus 38mm for connectors)

Weight: 9kg