AGMPB = ADJUSTABLE GAIN MAGNETIC-PIEZO BUFFER USE THIS HANDY LITTLE PREAMP TO BALANCE THE SIGNALS OF PIEZO AND MAGENETIC PICKUPS PIEZO AND MAGNETIC SIGNALS EACH HAVE THEIR OWN MINI CONTROL POT THE AGMPB CAN WORK WITH A PREAMP THE AGMPB REPLACES BART'S OLD MPB2 PIEZO BUFFER AND NOW ALLOWS FOR ADJUSTABLE GAIN ON BOTH CHANNELS FREE SHIPPING IN THE USA EXPERT TECHNICAL SUPPORT IN STOCK MEANS IN STOCK DESCRIPTION Dual-channel buffer/preamp with totally flat response and independently adjustable gain on both the piezo and magnetic channels. The AGMPB/918 is a dual-channel buffer/preamp that provides a high impedance input for use with piezo or microphonic transducers and channel isolation for magnetic pickups. Both channels are equipped with trimmers for adjustable gain allowing you to boost the output signal up to 12dB (4x) while maintaining a perfectly flat response. It is less than 1/2 the size of a 9-volt battery making it ideal for instruments with limited cavity space. The AGMPB/918 provides a powerful output signal and isolation from external equipment that may otherwise adversely affect pickup tone. This is an upgrade replacement for the MPB2-918 simplifying wiring and adding true gain adjustment to both channels. The AGMPBoo is a further advancement that adds connector pins for up to 7 industry standard piezo bridge saddle plugs. This simplifies wiring connections further and eliminates the need for a separate 2.0mm pitch summing connector. The AGMPB/918 and the AGMPBoo are ideal for providing excellent tone from an instrument with 1 or 2 magnetic pickups and a piezo bridge pickup. Both channels deliver clear and transparent sound with extremely low distortion. Like all of Bartolini preamps, it is internally shielded to reject electromagnetic noise and includes filters to block AM and FM radio signals on the inputs. Bartolini set the standard for fully sealing the sensitive electronics. They use only professional double tin-plated pure copper wire with durable semi-rigid insulation. This ensures that the 4-inch pre-stripped wires do not flop around in the cavity and that the wire does not cut through the insulation over time. Both buffers can be used with a single 9-volt battery (9-volt operation) or with two 9-volt batteries wired in series (18-volt operation) for 6dB extra headroom with no tonal change. Both deliver clear and transparent sound with extremely low distortion. The buffers are sold as a kit that include a 25KOhm blend pot. TECH & DIMENSIONS Module Size:1.05" [26.7mm] Long0.79" [20.1mm] Wide0.43" [10.9mm] Thick Operating Voltage: 9V or 18V Magnetic Channel Input Impedance: 1MΩ Piezo Channel Input Impedance: 3.3MΩ Output Impedance: 3.6KΩ Magnetic ChannelThe pre-wired gain trimmer lets you adjust the output level of the magnetic channel.Gain: 0-12dB Piezo ChannelThe pre-wired gain trimmer lets you adjust the output level of the piezo channel.Gain: 0-12dB AGMPB/918 Wiring diagram
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