The loudspeaker shall be a self-powered, full- range system; the transducers shall consist of two 4-in low frequency cone drivers and one 1-in high-frequency metal dome tweeter. The loudspeaker system shall incorporate internal processing electronics and a three channel amplifier, one channel for each driver. Processing functions shall include equalization, phase correction, signal division, and driver protection. The crossover point shall be 1.5 kHz. Amplifier channels shall be class D. Amplifier output power shall be 500 W total for all three channels. Distortion (THD, IM, TIM) shall not exceed 0.02%.
Performance specifications for a typical production unit shall be as follows, measured at 1/3-octave resolution:
operating frequency range shall be 65 Hz to 18 kHz; phase response shall be 102 Hz – 18 kHz ±45°; linear peak SPL shall be 116.5 dB measured with M-noise, free field at 4 meters and referred to 1 meter. The horizontal and
vertical coverage shall be 100°.
The loudspeaker shall be equipped with a Phoenix 5-pin male connector (three pins for balanced audio and two
pins for DC power). The audio input shall be electronically balanced with a 10-kOhm impedance and accept a
nominal -2.0 dBV (0.8 V rms) input signal. Power requirements for the loudspeaker shall be a Meyer Sound MPS-488HP IntelligentDC power supply capable of delivering 48 V DC. Maximum long-term continuous current draw for the loudspeaker (< 10 s) shall be 1.0 A average at 48 V.
All components shall be mounted in an acoustically vented box shaped enclosure constructed of aluminum. Top and bottom shall incorporate M8 threads. The front protective grille shall be powder-coated, stamped steel.
Dimensions for the loudspeaker shall be 15.90 in high x 4.29 in wide x 5.69 in deep (403.9 mm x 109 mm x 144.4
mm) without mounting bracket. Weight shall be 14 lb (6.35 kg).
The loudspeaker shall be the Meyer Sound UP-4slim.
Keyword: Subwoofer, Subwoofers, Loudspeaker, Loudspeakers
4.4 
