Yamaha 12 GF24/12 GF16/12 GF12/12 Owners Manual - Page 18

18 Front and rear panel 5 REC OUT jacks These are phono jacks (unbalanced) that output the signal from the ST bus, with a nominal level of -10 dBV. This output signal is not affected by external effect processors connected to the ST INSERT I/O jacks (B) or by the position of the STEREO fader (page 12, 3 in the STEREO/ MONO control section). The pin wiring is shown in the following diagram. Phono plug Tip Sleeve 7 INPUT A jacks 1-20 {1-12 on the GF16/12, 1-8 on the GF12/12} These are XLR-3-31 type input connectors (balanced) for the monaural input channels. Nominal input level is -16 dB to -60 dB when the pad switch (page 6, 1 of the monaural input channel section) is off, and +10 dB to -34 dB when the pad switch is on. When the PHANTOM +48 V switch (page 14, 1 of other controls/connectors) is on, DC +48 V phantom power is supplied to pins 2/3. The pin wiring is shown in the following diagram. Male XLR connector 1 (ground) 3 (cold) 6 INPUT A jacks 21-24 {13-16 on the GF16/ 12, 9-12 on the GF12/12} These are 1/4" phone input jacks (unbalanced) for the stereo input channels, with nominal level of +10 dB to -34 dB. When using these as mono channels, insert a plug only into the 21L/23L jacks {13L/15L on the GF16/12, or 9L/11L on the GF12/12}. The pin wiring is shown in the following diagram. 1/4" phone plug Tip (send) Sleeve (ground) 2 (hot) 8 INPUT B jacks 1-20 {1-12 on the GF16/12, 1-8 on the GF12/12} These are TRS phone input jacks (balanced) for the monaural input channels. Nominal input level is the same as for the INPUT A jacks (7). Be aware that it is not possible to simultaneously use both the INPUT A and INPUT B jacks of the same channel. Phantom power is not supplied to the INPUT B jacks. The pin wiring is shown in the following diagram. 1/4" TRS phone plug Tip (hot) Ring (cold) Sleeve (ground) -Owner's Manual