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If you are using additional speakers hooked up to the left and right outputs (9), ensure they are of an 8 Ohm
minimum impedance. Remove the speakers temporarily to determine if this is the source of distortion. If the
distortion is emanating from the left and right speakers, the total capacity of QW 118P, or the speakers has
possibly been exceeded. Reduce the drive level and recheck the speakers for impedance (8 Ohms minimum).
A A r r c c h h i i t t e e c c t t u u r r a a l l & & E E n n g g i i n n e e e e r r i i n n g g S S p p e e c c i i f f i i c c a a t t i i o o n n s s
The powered subwoofer loudspeaker system shall have a frequency response from 40 Hz to 120 Hz for the
subwoofer portion. The peak SPL with unnoticeable distortion shall reach 130 dB with music as a source, when
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measured at a distance of 1 meter and driven to full output capacity. The system shall utilize an 18" Low Rider
bass woofer.
The powered, bridged subwoofer system shall have a left and right group of medium impedance input
connectors, consisting of one combo female XLR and 1/4" TRS phone jack and one male XLR per channel on the
rear panel, all connected in parallel per channel. A set of left channel and right channel XLR high-pass output
jacks shall be provided. A Master System level volume control will be located next to the input jack groups. left
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and right Speakon
outputs capable of driving an 8 Ohm speaker shall be provided.
The system power amplifiers shall have an unfiltered frequency response of 10 Hz to 30 kHz which deviates no
more than +0, -1 dB up to rated power, a damping factor greater than 100 @ 1 kHz into 8 Ohms, hum and noise
better than 90 dB below rated power, and THD and IMD of less than 0.3%. The bridged woofer connection shall
be capable of up to 1000 Watts into a 8 Ohm nominal bridged load, and the left and right outputs shall be
capable of up to 250 Watts output into a 8 Ohm load, and both shall incorporate DDT
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compression.
The input signal shall be electronically divided into high frequencies and low frequencies by a Linkwitz-Riley
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fourth order slope, line-level crossover at 120 Hz. The low frequencies shall have the option of being kosmos
processed to provide bass boost, and subsonic filtering and overall response shaping shall be applied. The high
frequencies shall be high-pass filtered.
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Premium 19 mm plywood with a scuff-resistant Hammer Head
black cabinet finish shall be provided. A metal
handle shall be placed on each side of the enclosure, and casters located on the rear to allow the unit to be
flipped over and rolled around for transport.
A 16-gauge powder-coated, perforated metal grille shall be provided for woofer protection. The cabinet shall
incorporate four tall sturdy rubber feet for floor standing use, and a pole stand tunnel on the top for stand
mount use.
The outside dimensions shall be 28.312" tall by 21" wide by 27" deep, and the weight shall be 122 lbs. Power
requirements shall be: 1300 Watts, 120 VAC, 60 Hz Domestic and 240 VAC, 50 Hz (European). The loudspeaker
system shall be called a Peavey QW 118P.
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