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GT Amplifier - Coin door / menu volume set to 15 (usable range 10-20, do not exceed 20).KO Amplifier - Coin door / menu volume set to 30 (usable range 10-max)System Menu:Music attenuation set to 0Spee … read more

Below is the account of what we did here at PinWoofer to our Jersey Jack Pinball (JJP) electronics in an attempt to improve the backbox sound field, and to address some of the constraints inherent in … read more

Coin Door / Menu volume to 28 (for the GT Amplifier, usable range 23-30, do not exceed 30) Gain to 2 o'clock position (GT Amplifier). Bass Freq to 1 o'clock position. Bass Vol to 6 o'clock posit … read more

GT Amplifier: Coin door / service menu volume set to 12 (do NOT exceed 20).KO / KOP Amplifier: Coin door / service menu volume set to 35 (usable range 0-max). SERVICE MENU → UTIL → VOL→: … read more

KO / KOP Amplifier - Coin door / menu volume set to 35 (usable range 0-max). SERVICE MENU → UTIL → VOL→: SELECT BACKBOX SPEAKER TYPE → 8OHM (DEFAULT)SELECT AUDIO FILTER EQ / SHELF / None → NoneSER … read more