Behringer BDI21 User Manual
Bass Amp Modeler/Direct Recording Preamp/DI Box
Thank you for showing your confidence in us by purchasing the
from vintage to modern. In addition, the BDI21 functions as a standard
A DI (Direct Injection) box allows you to send a signal directly from an unbalanced,
Whether for stage, recording, rehearsal or
1. Control Elements
(1)The DRIVE control adjusts the overall amount of gain and overdrive, similar to pushing the output section of a tube amp.
(2)The TREBLE control governs the
(3)The BASS control allows you to boost/cut the
(4)The PRESENCE control boosts the upper harmonic content for a smoother high end and more attack.
(5)The LEVEL control adjusts the output level of the BDI21.
(6)The BLEND control adjusts the amount of tube emulation. The tube emulation circuitry provides the real tube sound of a miked bass tube amp.
(7)When activated, the GND LIFT disconnects the ground connection between input and output. Depending on the grounding of the connected equipment, this can eliminate hum or ground loops.
(8)Use the footswitch to activate/deactivate all the tone functions (EQ, DRIVE, tube emulation). When deactivated, the BDI21 functions solely as a standard transparent DI box.
(9) This LED illuminates when the effect is activated (see (8)).
(10)Use this ¼" TS INPUT connector to plug in the instrument cable of your bass guitar or other instruments.
(11)BAL OUT is the BDI21’s balanced mic level output. Use a
(12)The unbalanced ¼" TS OUT connector sends the signal to your bass amp.
Bottom of the BDI21
(13)SERIAL NUMBER. The serial number of the BDI21 is located at the bottom.
(14)BATTERY COMPARTMENT. Open the lid to install or replace the 9 V battery.
◊The BDI21 is powered as soon you insert a plug into the INPUT. The battery is “disconnected” when the plug is removed. For this reason, the BDI21 has no on/off switch. To prolong battery life, always disconnect the input when the driver is not in use.
Power supply connector
(15) Use theDC IN connection to plug in a 9 V power supply (not included).
2. Safety Instructions
Do not use near water, or install near heat sources. Use only authorized attachments/accessories. Do not service product yourself. Contact our qualified servicing personnel for servicing or repairs, especially when power supply cord or plug is damaged.
Please register your new BEHRINGER equipment right after your purchase by visiting http://behringer.com and read the terms and conditions of our warranty carefully.
9 V, >50 mA DC regulated
2 mm DC jack, negative center
9 V type 6LR61
Dimensions (H x W x D)
approx. 5 x 3 9/10 x 2"
approx. 127 x 100 x 50 mm
approx. 1.01 lbs / 0.46 kg
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these efforts, modifications may be made from time to time to existing products without prior notice. Specifications and appearance may differ from those listed or illustrated.
5. Sample Settings
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