Commercial Power Amplifier

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  • Regular price $1,035.00

General Description:

The Quest Commercial PB-4120 is a two rackspace, four-channel professional power amplifier for distributed power applications. The PB4120 is capable of delivering 120 watts RMS output per channel at 4 ohms, but can also run at 70 or 100 volts thanks to the high performance internal toroidal matching transformers. The PB-4120's advanced technology, clear sound, lightweight and reliable performance makes it ideal for any distributed sound system installation.



  • Front : Power On/Off switch
  • Rear : Volume control and HPF On/Off switch for each channel

Connectors: Input : XLR female jack for Balanced Input & XLR male jack for Link on each channel.

Output: Euro 4 pin connector on each channel (COM,4 ohm, 25V, 70V)

Indicators: Power On and Signal,Peak,Protection for each channel.

Protections: Output current limiting, thermal protection & fuse

Cooling: Variable speed fan forced cooling


Rated Power Output (1kHz, THD 5%) - Puissance (1kHz, DHT 5%)

120W x 4

Output Level /Impedance

Niveau de Sortie / Impédance

70V, 25V, 4 ohms

Input Sensitivity - Sensibilité d'Entrée


Input Impedance - Impédance d'Entrée

10kohm Balanced / Balancée

Frequency Response (-3 dB) - Réponse en Fréquence

50Hz - 18kHz

T.H.D (1 kHz, 1/3 Rated) - Distortion Harmonique Totale


Signal to Noise Ratio - Rapport Signal sur Bruit


Power Source - Source d'Alimentation

AC 120V 60 Hz

Weight (Net) - Poids (Net)

32.6 lbs. (14.8 kg)

Dimensions (W x H x D) - Dimensions

19" x 3.5" x 17.1" (482 x 88 x 433 mm)

UPC Code - Code CUP