TheQuest CommercialPB-4120D andPB-4300Dare versatile and efficient Class D, digital multi-channelpower amplifiers of advanced design, able to drive 70/100 V-line loudspeaker systems directly as wellas low impedance 4/8ohms speaker loads. The PB-4120D can deliver 120 watts RMS per channel, andthe PB-4300D can deliver 300 watts RMS per channel. The PB-Series advanced technology, clear sound,lightweight and reliable performance makes it ideal for any distributed sound system installation.

Features

• The amplifiers deliver either 120W or 300W of clean power per channel at 70/100V and 4 Ohms
• Class D amplifier operating at 85% efficiency using switching power supplies. The
• PB-Series amplifiers generate virtually no heat, thanks to their low current draw.
• Built-in70/100V output transformers with flat frequency response from 40Hz to
• 20kHz provide constant voltage for distributed speaker systems.
• Independent input level controls for each channel allow precise adjustments.
• Clean, crisp sound Impressive audio specifications such as < 0.3% THD, dynamic range of 105 dB, crosstalk of > 70 dB, and frequency response of 50 Hz to 18 kHz guarantee ultra-clean sound quality.
• LED signal indicators for each channel continuously display power output levels and allow you to correct for overloading (clipping) conditions.
• Forced air cooling via internal fan provides reliable performance without thermal and overheating problems.
• Input connections for each channel are made using Euroblock connectors to accommodate both balanced and unbalanced signals sources.
• Output connections for each channel are made using Euroblock connectors which accept 12 gauge wire.
• CSA/UL approved.
• Class D & switching power supply
• PB-4120D @ 120V / 5.8A
• PB-4300D @ 120V / 13.9A
• The PB-Series amplifiers can be mounted in any standard 19 rack (taking just two rack spaces), making it easy to integrate into any fixed or traveling PA rig.
• Housed in a double rack space (2RU) 19 rack mounting housing.
• Three-year warranty.

Specifications

• Rated Power (1kHz, 1%THD+N )
• 300W x4 (70/100V)
• 150W x4 (8)
• 300W x4 (4)
• Output Impedance: 4, 100V (33.3 ) or 70V (16.3 )
• Input Sensitivity: 1Vrms
• Input Impedance: 10K Balanced
• Frequency Response: 50Hz – 18kHz
• Total Harmonic Distortion + Noise: < 0.3%
• Signal to Noise Ratio: > 90 dB
• Common Model rejection: 70 dB
• Crosstalk: > 70 dB
• High-Pass filter switch: 400 Hz
• Protection: DC-Short Circuit, Over Heating, Overload
• Cooling system: Temperature controlled fan
• Amplifier Technology: Class D
• Power supply: 120V AC, 50/60Hz
• Weight (Net): 21.4 lb3 (9.7 Kg)
• Unit Dimension (WxHxD): 19 x 14.75 x 3.5 in (483 x 375 x 89mm)