JBL GTH400-20107 manual Typical Applications

GTH400-20107 06/03/98 15:49 Side 7

3.2 Typical Applications

The diagrams on pages 8 & 9 show the most common basic system configurations of the GTH400. One or more of these building blocks may be combined to form elaborate system designs.

Application 1

6-Channel Bi-Amplified System with Non-Fading Subwoofers

	Group 1	Group 2	Group 3
Mode	Stereo	Stereo	Stereo
Group 2 Input	–	GR 2	–
Group 3 Input	–	–	GR 1+2
Speaker Crossover	High Pass	High Pass	Low Pass
Preamp Crossover	–	–	–

The GTH400 uses the terminology “Group 1,” “Group 2” and “Group 3” to indicate the three main signal paths within the amplifier. Each “group” may consist of a mono bridged signal or a stereo pair of L+R signals depending on the system configuration.

		L	R		L	R
Front				Preamp or		Rear
			Speaker-Level
		L	R Input		L	R
	GR 1					GR 2

GTH400

GR 1	L+	L–	GR 2	L–	L+	GR 3
L–			L+
	R–	R+	R–	R+	R–	R+

–	+ –	+	–	+ –	+	–	+ –	+
L	R		L	R		L		R

Front Speakers Rear Speakers Subwoofers

Application 2

5-Channel Bi-Amplified System with
Non-Fading Mono Subwoofer					L
				Front
	Group 1	Group 2	Group 3		L
Mode	Stereo	Stereo	L+R
				GR 1
Group 2 Input	–	GR 2	–
Group 3 Input	–	–	GR 1+2
Speaker Crossover	High Pass	High Pass	Low Pass
Preamp Crossover	–	–	–
				GTH400

R L

Preamp or

Speaker-Level R Input L

R Rear

R

GR 2

GR 1

L–

L+

R–

L–

R+

GR 2

L+

R–

L–

R+

GR 3

R+

–	+	–	+
	L		R

–	+	–	+	–	+
	L		R

Front Speakers Rear Speakers Subwoofer

Satellite Speakers

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