PA CP. Amplifier Gain 10 August 2021 14:16 The gain between the AMP IN jacks and the speakON outputs is 34dB. Related articles PA CP. Transformer wiring PA Series. Can I use a BOSE speaker controller system? General. Gain structure. Input gain. PFL PA Series. What are the specifications for the SPDIF output? PA12. PA12-CP. Rackmount Kits