External amplifier connections, External ampliﬁer connections ……………… 25, Ch at pe r 2 - c on ne ct io ns – Adcom GFR-700HD User Manual

Page 25: External ampliﬁer connections

r 2 - C

www.adcom.com

GFR-700HD Owner’s Manual

External Ampliﬁer Connections

The GFR-700HD’s built-in 5 x 145 watts per channel

(EIA/CEA 490-A) ampliﬁer has more than enough

power for most home applications. Nevertheless, 7.1

preamp outputs are provided so you can hook the

GFR-700HD 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-700HD’s built-in ampli-

ﬁer 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-700HD to the cor-

responding RCA inputs on your external ampli-

ﬁer.

• 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-700HD to the correspond-

ing 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-700HD to the corresponding input on

your powered Subwoofer.

��

��

��

��

�

��

��
��
��

��

��

��

��

��

��

��

��

��

��

�

��

��

��

��

�

��

�

��

�

��

��

��

��

��

��

�

��

��

Notes:

• To conﬁgure your speakers,

see pages 37-39.

Surround

Back Right

Output

Surround

Back Left

Output

Subwoofer

Output