Peavey QW ML 2-Way Full-Range Floor Monitor Loudspeaker with 15" Woofer, 67Hz-18kHz Frequency Response, 8 Ohms Nominal Impedance, Single, Black

The Peavey Q Wave Monitor is a two-way, fullrange floor monitor loudspeaker system employing a newly-developed Pro Rider 15" woofer along with a 44XT compression driver and a CH -6 conical constant directivity horn. The QW-Monitor's shape helps reduce the build-up of standing waves inside the enclosure, which minimizes mid-bass and mid-range coloration. It is constructed of premium 18 mm poplar plywood and is covered with a tough, durable, black textured Hammer Head polyurethane coating. A 16-gauge, powder-coated, perforated metal grille covers the front of the system to protect the speakers from external damage. The 15" Pro Rider woofer features a Kevlar impregnated, water-resistant treated cone and dust cap for superior environmental stability. A 44XT 4" titanium diaphragm compression driver handles the high frequencies and features the Radialinear Planar Phase Correction System (US Patent 6, 064, 745), which provides smoother and extended high frequency response. Its CH- 6 conical constant directivity horn provides an even 60deg. coverage in all directions. PRILIMINARY SPECIFICATIONS QW-Monitors Full range input to the system is made via two four pin Neutrik jacks in parallel. A secondary input location is provided so that either side of the unit may be connected to the amplifier or another monitor used in parallel. A four pin Neutrik switching jack is provided for biamp input flexibility while maintaining superior signal integrity. The inclusion of a standard four pin Neutrik jack in parallel on the driver side of the biamp switching jack provides for daisy chaining to another cabinet when biamp operation is desired. The internal passive crossover features the Sound Guard 44 high frequency driver protection circuit and an advanced topology crossover with high performance components to provide high power handling and reliability. This proprietary, high frequency driver protection circuitry provides long- and medium-term driver overload protection without impairing musical transients or dynamics. The crossover provides driver roll-off and protection as well as driver EQ for the woofer and horn. The result is a clean, clear and smooth response. High quality, reliable crossover components include polypropylene capacitors and high-current inductors. The optimal integration of the crossover with the selected drivers results in a smooth frequency response from the QW-Monitor.

Frequency response
This measurement determines how accurately a given unit reproduces an input signal. The frequency response of the QW-Monitor is measured at a distance of 1 meter using a 1 Watt swept-sine input signal (into the nominal impedance). As shown in figure 1, the selected drivers in the QW-Monitor combine to give a smooth frequency response from 67 Hz - 18 kHz.

Power handling
There are many different approaches to power handling ratings. Peavey rates this loudspeaker system's power handling using a full-range form of the AES Standard 2-1984. Using audio band 20 Hz to 20 kHz pink noise with peaks four times the RMS level, this strenuous test signal assures the user that every portion of this system can withstand today's high technology music. This rating is contingent upon having a minimum of 3 dB amplifier headroom available.

Harmonic distortion
Second and third harmonic distortions vs. frequency are plotted in figures 3 and 4 for two power levels, 10% of rated input power and either 1% of rated input power or 1 Watt, whichever is greater. Distortion is read from the graph as the difference between the fundamental signal (frequency response) and the desired harmonic. As an example, a distortion curve down 40 dB from the fundamental is equivalent to 1% distortion.

Architectural and engineering specifications
The loudspeaker system has an operating bandwidth of 67 Hz - 18 kHz, with a nominal output level of 97.0 dB when measured at a distance of 1 meter with an input of 1 Watt. Its nominal impedance is 8.0 Ohms. The QW Monitor's maximum continuous power handling is 1, 000 Watts, with 2, 000 Watts maximum program power and a peak power input of at least 4, 000 Watts, plus a minimum amplifier headroom of 3 dB. The nominal radiation geometry is 60deg. in the horizontal plane and 60deg. in the vertical plane. The outside dimensions are 17.75" high by 29.75" wide by 21.25" deep. The QW-Monitor weighs 85 lbs.