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Powering 120W into 70 or 25V commercial speakers—or 4, 8, and 16 Ohms systems—the PBM120A from Speco Technologies is a public address amplifier and mixer designed for any situation in which music-on-hold (MOH) is a must. This amplifier features connective options for AM and FM antennas, as well as three pairs of RCA auxiliary channels, three balanced microphones, one RS-232 (for console control) and a terminal TEL input. In addition to its five 70 or 25V zones for commercial speakers and its 4/8/16 Ohm outputs, the PBM120A also gives you the option to route outgoing signal via RCA or XLR connections.
Turn your attention to the front panel and you'll notice a panoply of controls. Note, for instance, the six zone selection buttons; with these, you can turn specific speaker runs on or off. The front panel is adorned with level controls over each input, as well as a master volume output, and an input selector for the auxiliary channel. Use this feature to choose between a sound-source plugged into the amplifier or any module you have racked into its outstanding free space (specific modules available separately).
Additionally, the PBM120A provides connection possibilities for telephone paging and music-on-hold applications, including a priority paging switch which mutes all other channels when signal is passing through the microphone 1 input. This unit includes an IR remote control and a set of rack-mounting hardware.
Includes IR remote and rack-mounting kit
5 zoned 70 or 25V speaker outputs
Non-zoned 4/8/16 Ohms output
Master digital volume control with display
Individual volume control for each input
Front bass and treble controls
Phantom power for all mic inputs
Mic 1 selectable for priority paging
Digital front panel lock
RCA or XLR line output
Telephone paging input and music-on-hold output
RS232 input for integration with popular control systems
In the Box
Speco Technologies PBM120A Public Address Amplifier with Module Bay
IR Remote Control (Battery Included)
Set of Rack-Mounting Hardware
AC Power Cord
Limited 5-Year Warranty
Table of Contents
RMS Output Power
Max Output Power
4/8/16 Ohms (non-zoned), 70 or 25 V (zoned)
RCA or XLR
1x AM antenna (press terminal) 1x FM antenna (BNC) 3x aux (stereo RCA) 3x mic (XLR) 1x RS-232 1x TEL (terminal)
50 Hz to approximately 20 kHz
Tone Control (Treble / Bass)
Less than 1% @ 1 kHz
Signal to Noise Ratio
> 89 dB
Volume for each source Master volume Vox volume MoH volume Tone Source selector Zone selector Module
TEL in and MoH Out
Volume level, power, source, system Lock
AC Power Consumption
115 VAC, 60 Hz
Dimensions (W x H x D)
16.9 x 3.4 x 11.8" / 42.9 x 8.6 x 29.8 cm
26.5 lb / 12.0 kg
Speco Technologies PBM120A Public Address Amplifier with Module Bay Review