Dolby Laboratories CP65 - Manual (Page 16)

2-10
Cat. No. 241 Surround Equalization and Optical Bass Extension. Module (if
fitted).
High
subwoofer
output
Cat. No. 241
J1
Low
subwoofer
output
J1 Optical Bass Extension output level: sets the output level range for the subwoofer
channel. In the HIGH position J1 is set at the factory for a power amplifier input
sensitivity of between 90 mV and 1.23 V. If the power amplifiers used in the
installation are very sensitive (10 mV to 100 mV input sensitivity), it may be necessary
to set J1 to the LOW position. If you are unsure of the sensitivity of your power
amplifiers set J1 to the LOW position initially. If the high output position is required
this will be determined during OBE alignment.