Yamaha GF12/12, GF16/12, GF24/12 9, 0, A

Connectors 19

—Owner’s Manual

9INSERT I/O jacks 1–20 {1–12 on the GF16/

12, 1–8 on the GF12/12}

These are TRS phone input/output jacks for

inserting external effect processors between the

EQ and channel fader of a monaural input chan-

nel. Nominal level is 0 dB. The pin wiring is

shown in the following diagram.

0INPUT B jacks 21–24 {13–16 on the GF16/

12, 9–12 on the GF12/12}

These are phono input jacks (unbalanced) for the

stereo input channels. Nominal level is the same

as the INPUT A jacks (6). On the stereo input

channels, you can make connections both to the

INPUT A jacks (6) and the INPUT B jacks (0),

and use the A/B switch (page 8, 1 in the stereo

input channel section) to select whether INPUT

jack A or B will be used.

Be aware that in the case of the INPUT B jacks,

the channel cannot be used as a mono input

channel by inserting a plug only into 21L and

23L. (If only 21L or 23L are connected, the signal

will be sent only to the left channel.) The pin wir-

ing is shown in the following diagram.

AAUX RETURN jacks 1/2

These are 1/4" phone input jacks (unbalanced)

for connecting the stereo output of external effect

processors, etc. The nominal level is +4 dB. If

inputting a monaural signal, connect a plug only

to the 1L or 2L jack. The pin wiring is shown in

the following diagram.

1/4" phone plug

1/4" TRS phone plug To processor’s input

From processor’s output

Connect to INSERT I/O jack

Tip (send)

Ring (return)

Sleeve (ground)

Tip (return)

Sleeve (ground)

Phono plug Tip

Sleeve

1/4" phone plug

Tip (send)

Sleeve (ground)