Ch at pe r 2 - c on ne ct io ns, External ampliﬁer connections – Adcom GFR-700 User Manual

Page 25

r 2 - C

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GFR-700 Owner’s Manual

External Ampliﬁer Connections

The GFR-700’s built-in 5 x 125 watts per channel am-

pliﬁer has more than enough power for most home

applications. Nevertheless, 7.1 preamp outputs are

provided so you can hook the GFR-700 up to an even

bigger rig (the GFA-7707 comes to mind), if desired.

More importantly, these preamp outputs can also be

used in tandem with the GFR-700’s built-in ampliﬁer

to connect a subwoofer (S) and surround back (RB/

LB) speakers.

Connecting an Ampliﬁer

1 Using eight RCA cables, connect the 7.1 channel

preamp outputs from the GFR-700 to the corre-

sponding RCA inputs on your external ampliﬁer.

• Connect the RF, LF, RS, LS, RB, LB, and C

outputs to the ampliﬁer and the S output to

a powered subwoofer.

2 If you have a 5.1-channel ampliﬁer, use ﬁve RCA

cables and omit the RB and LB connections. Con-

nect the S output to a powered subwoofer.

Connecting Surround Back Speakers

For full 7.1 surround sound, you’ll want to connect

surround back speakers, which must be connected to

an external ampliﬁer.

1 Using two RCA cables, connect the RB and LB

outputs from the GFR-700 to the corresponding

RCA inputs on your external ampliﬁer.

2 Connect your right and left surround back speak-

ers to the external ampliﬁer.

Connecting a Subwoofer

The “.1” in 5.1 and 7.1 stands for the all-important

Subwoofer, also known as an L.F.E., or low-frequency

effects channel. No home theater would be com-

plete without a subwoofer rumbling your listening

area with thunderous bass.

1 Using an RCA cable, connect the S output from

the GFR-700 to the corresponding input on your

powered Subwoofer.

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Notes:

• To conﬁgure your speakers,

see pages 34-36

Surround

Back Right

Output

Surround

Back Left

Output

Subwoofer

Output