Architectural and Engineering
The powered loudspeaker system shall have a frequency response from 46 Hz to 180 Hz with the Crossover knob
turned all the way CW, and from 46 Hz to 90 Hz with the Crossover knob turned all the way CCW, at the - 6 dB
points. The peak SPL with inaudible distortion shall reach 127 dB with music as a source, when measured at a
distance of 1M and driven to full output capacity. The system shall utilize a premium 18” heavy-duty woofer in a
vented enclosure tuned to 38 Hz.
The powered loudspeaker system shall have an input channel consisting of a medium impedance balanced input
connector consisting of one combo female XLR and 1/4” TRS phone jack on the rear panel. A Ground Lift
Switch shall be provided to allow the disconnection of the input cable shield from the system ground to provide
for breaking any possible ground loops.
There shall be a Direct Thru (output) connector consisting of a male XLR jack.
There shall be two female XLR jack filtered high-pass outputs providing a crossed over signal to satellite speak-
ers.
The system power amplifier shall have an unfiltered frequency response of 20 Hz to 20 kHz which deviates no
more than +1, -3 dB up to rated power, hum and noise better than 90 dB below rated power, and THD typically
of less than 0.1%.
The power amplifier shall be capable of 500W sine wave output into a 4 ohm nominal load, and 1000W peak
available power, and shall incorporate DSP controlled signal compression and limiting.
The input signal shall be electronically divided into high frequencies and low frequencies by a Linkwitz-Riley
fourth order slope line-level crossover, with crossover frequencies variable from 90 Hz to 180 Hz via a rear panel
Crossover knob. The low frequencies shall be processed to provide bass boost, subsonic filtering and overall
response shaping, and the high frequencies shall be made available flat. A Bass Enhance button shall be provided
to enable additional bass frequency output at lower SPL levels. A Polarity Switch shall be provided to allow the
subwoofer polarity to be switched from Normal to Reversed polarity.
The enclosure shall be constructed of 15 mm MDF with a textured black finish. A pair of steel handles shall be
incorporated on the sides of the cabinet and four sturdy rubber feet on the bottom for floor standing use. Large
heavy-duty locking casters shall be provided on the rear of the cabinet to aid in transport.
A full-length powder-coated metal grille shall be provided for woofer protection. The cabinet shall incorporate a
threaded pole mount for a pole to be used for a satellite speaker, and the threaded pole shall be included.
The outside dimensions in the operating position shall be: 26.07” (66.2 cm) tall x 20.00” (50.8 cm) wide x 26.75”
(67.9 cm) deep (including the casters), and the weight shall be 94.5 lbs. Power requirements shall be: 160 Watts
nominal, 120 VAC, 50/60 Hz Domestic and 220-240 VAC, 50/60 Hz (Export). The loudspeaker system shall be
called a Peavey® PVs 18 Sub.
