Madrigal Imaging Audio/Video Preamplifier manual Example Wire Lengths AWG Size Feet Stranding

conventional surround placement

The Wiring

example wire lengths chart

Working in Unusually Large Rooms

sub

L sur L

C

R sur R

Low impedance speaker wire must be used throughout the system. This ensures the most efficient transmission of power from the amplifiers to the speakers, which minimizes several forms of audible distortion. Surprisingly, not all speaker wires (including some of the audiophile variety) meet the necessary criteria. As always, your best source of advice is your trained dealer/installer. However, the table below may be used as a worst-casegeneral guide. When in doubt, use a thicker (heavier gauge) wire than is specified below.

Example Wire Lengths

Length	AWG Size
(in Feet)	& Stranding
up to 12'	16 gauge
	(19/29)
up to 18'	14 gauge
	(19/27)
up to 29'	12 gauge
	(65/30)
up to 51'	10 gauge
	(105/30)

Large rooms (in the 4000-6000 cubic feet range) have so much air to move that they may benefit from having additional subwoofers for greater bass impact. The PAV’s subwoofer output can easily drive several power amplifiers—simply split its output with Y-connectors.

Another technique for large rooms involves the construction of risers for the seat- ing area in a dedicated home theater. Risers tend to enhance the visceral effect of deep bass by providing a resonant platform for the couches and chairs, thereby transmitting structural as well as airborne vibrations to the audience. This ap- proach can be used alone or in conjunction with extra subwoofers. If both tech- niques are used, consider building one or more subwoofers into the riser, which both conceals the subwoofer’s bulk and maximizes the vibrations being transmit- ted to the listener’s chair. (Action movies will never be the same.…)

32