Input' of the Power amp to the PRE OUT 1 & 2 sockets. NOTES: Always turn the C370 and associated external power amplifiers off before connecting or disconnecting anything to the PRE-OUT 1, 2 and MAIN-IN sockets. The PRE-OUT 1&2 output signals will be affected by the NAD C370's volume and tone control settings. 11. VOLUME PRE OUT 2 The VOLUME Pre-Out 2 control allows for adjustment of the output level of the PRE OUT 2 sockets. The output level can be reduced from 0dB to -12dB; when set to the maximum position (at the 0dB position), the output level will be identical to that of the PRE OUT 1 sockets. Refer also to chapter "Bi-Amping" for more information. NOTES: Always turn the C370 and associated external power amplifiers off before connecting or disconnecting anything to the PRE-OUT 1, 2 and MAIN-IN sockets. The PRE-OUT 1&2 output signals will be affected by the NAD C370's volume and tone control settings. 12. BRIDGE MODE The NAD C370 can be used as part of a higher power stereo or home-theatre system, by connecting adding additional power amplifiers. If the power amp section in the NAD C370 is to be used to drive a single speaker, then use the Bridge switch to run the built-in Left and Right power amplifiers as a single channel, high power unit. Set the BRIDGE MODE switch to the 'Bridge' position and connect the speaker to the terminals marked 'L +' and 'R+' ensuring that the 'L+' is connected to the '+' terminal on your loudspeaker and the 'R+' is connected to the loudspeaker's '-' terminal. Connect the source to the Left MAIN-IN input. In Bridged Mode the NAD C370 will produce approximately 300W into an 8 ohm loudspeaker. In this mode, the amplifier sections will react as though the speaker impedance has been halved. Low impedance...