QUARTET MONO BLOCKS

50 watt 845 push pull mono block amplifier

When we were looking for an amplifier to fit between the power of push pull designs and the sheer musicality of lower power single end designs, we settled for the 845 push pull combination.

Having the look of our Carissa it has the power of the Concerto and the high frequency extension of the 300b.

Fitted with MKP  capacitors and carbon film resistors with automatic biasing with a solid state twin choke filtered power supply.

Split bobbin multi section output transformers.

Feedback 6 to 9db switchable low and high.

Rectified dc heater supply with twin pye filters.

Auto bias set for 85 mA @ 750v

Solid state twin choke power supply

Specifications:-

POWER: 45 WATTS RMS         

TYPE: PUSH PULL 845

FREQUENCY RESPONSE: 10 HZ TO 65 KHZ + – 0.5 db @1WTS

FREQUENCY  RESPONSE @FULL POWER       20 HZ TO 50 KHZ + – 1 db

INPUT SENSITIVITY:  700 mv

INPUT IMPEADANCE: 180 KΩ           

OUTPUT IMPEADANCE:   6Ω

 NOISE AT SPEAKER TERMINALS TYPICALLY:  3 mv

FEEDBACK: 0 db

BIASING: AUTOMATIC ELECTRONIC

CONSTRUCTION :HYBRID PCB / HARD WIRED

COMPONENTS:   RESISTOTRS 1% METAL OXIDE, CAPS LOW INDUCT. LOW ESR, COUPLING CAPS MKP

TRANSFORMERS:  MULTI SECTION SPLIT BOBBIN

RECTIFIER: SOLID STATE

DRIVERS: ECC 82 AND 12 BH7

HEATERS: AC CTR TAPPED

SET UP: NO SET UP REQUIRED, DRIVER VALVES MUST BE MATCHED

Size: 12 ½ inches wide, 18 inches deep, 10 inches high  

Weight: 27 kg (each)

Available with Chrome or Black Chassis