Audio Pro Sub+ MkII User manual

audio pro

Service manual

SUB+MKII S-GB1001

SUB+MKII

Including powered Subwoofer

featuringB5amplifier

Audio Pro AB. Box 1015. S-251 10 HELSINGBORG

SWEDEN

audio pro

ace-bass

TECHNOLOGY

Australia 508491

Great Britain 1565858

Canada 1083490

Sweden 7603585.6

USA 4.118.600

World patents:

Important note when repairing power amp pcb on B.5 or B.6 amp’s.

Before you perform soldering / unsoldering or DC resistance measuring on power

amp pcb, connector CN03B must be disconnected. Otherwise unwanted discharge

might cause damage on semiconductors.

Technical data Sub+ MkII

Enclosure: 100W powered, bass reflex.

Drive units, Woofer: 6 ½” long throw

Crossover -Hi Pass: 100Hz

-Lo Pass: 50 -100Hz 12dB/octav

Freq.range: 30-100Hz

Power requirements: AC 230V 50Hz

Power consumption (max): 200W

Dimensions(WxHxD mm): 280v290v300

Adjustment of negative output resistance in Sub+ MkII amplifier (B5)

Set jumper “Set ” on power amp pcb in Trim position.

Connect a signal generator to input and an AC voltmeter to speaker output.

Set level and frequency controls to maximum (fully clockwise) and switch amplifier on.

Set signal generator to 50 Hz and adjust level until AC voltmeter on speaker output reads

1.00 V under no load condition.

Connect a resistor 8.00 Ohm (1%) to speaker output.

Adjust trim potentiometer VR202 until AC voltmeter reads 6.27V.

Switch amplifier off and set jumper in Run position.

Important note!

This is an amplifier using ACE Bass technique. It can only be used with the driver

to which the specific ACE Bass circuit is designed.

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