Congratulations on your purchase of the Barcus-Berry Strings System
for 3125 (Cello) or B3150 (Upright Bass)
Barcus Berry string instrument transducers have long been the preferred choice of leading professionals throughout the world.
The Model 3125 for cello and B3150 for upright bass continue this tradition of excellence by incorporating some of the most
advanced transducer design technology available. These transducers can be quickly and easily attached to or removed from any
standard-type bridge. They have wideband frequency response, essentially unlimited dynamic range and excellent string bal-
ance. In addition, they offer a high degree of feedback rejection and outstanding signal isolation. These characteristics, coupled
with unexcelled reliability, make the 3125 and B3150 ideal for virtually all sound reinforcement and studio applications. These
transducers can be employed with all types of instrument setup; plain or wrapped gut, nylon-core or steel-core strings can all be
used in any desired combination.
Important
Before you begin, please check within the box to insure that it contains the following items:
(A) • One (1) Barcus-Berry clip-on transducer for either 3125 (Cello)
or B3150 (Upright Bass).
(B) • One (1) Barcus-Berry 3000 Piezo Buffer Preamp with EQ.
• One set of rubber feet (four each).
• Attachable belt clip with one set of “dual lock” attachment strips.
• Barcus Berry velcro strap.
• Black metal strap-mounting bracket with one set of adhesives.
• Installation Instructions for Model 3125 or B3150.
If any of these items are found to be damaged or missing, immediately contact
the Barcus-Berry dealer from whom the unit was purchased.
Installation
Each transducer is furnished with two nylon thumbscrews which are employed to
secure the transducer to the bridge of the
instrument. Back these screws out until the transducer can be fitted over the edge of the bridge on the E-string
side (Upright Bass) or C-string (Cello). When correctly fitted, the upper section of the transducer (from which the
cord emerges) will embrace the leg of the bridge, tighten both thumbscrews until they engage the rear face of the
bridge and exert enough pressure to securely clamp the transducer in place.
Connect the transducer to the 3000 by plugging into the input jack. Then connect the output of the unit to your
amplifier or mixing console. The 3000 is powered by a 9-volt battery and has volume, treble and bass controls.
To replace the battery, remove the side screws and slide the cover off the chassis. Remove the expended battery
and replace with a fresh cell. Be sure to observe the indicated polarity markings when inserting the battery into
the holder. Replace the cover on the chassis and resecure with the side screws.
(B)
(A)
(A)
