Direct Box


The DI-1 is a high-quality direct box with crystal-clear sound for transforming high-impedance, unbalanced instrument outputs to the low-impedance, balanced inputs of a mixing console.

Frequency Response
20 Hz to 40 kHz (+0.5/-1 dB)
Nominal Input Level
-20/0/+20 dBu (selectable)
Max. Input Level
+45 dBu (1 kHz), 390 Vp-p
Max. Output Level
+8 dBu (Balanced: 600 ohms load, Unbalanced: 50 k ohms)
Residual Noise
-110 dBu or less (IHF-A)
Total Harmonic Distortion
0.05 % or less
Power Supply
DC 9 V: Dry Battery (6F22/6LR61 type), or
Phantom Power: DC 24 V to DC 48 V
Current Draw
6 mA
Size and Weight
97 mm
3-13/16 inches
125 mm
4-15/16 inches
46 mm
1-13/16 inches
480 g
1 lbs. 1 oz.
* 0 dBu = 0.775 Vrms
*The specifications are subject to change without notice.




If you have questions about operating your BOSS product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner's Manuals

Support Documents

  • BOSS Product Catalog 2008

    Forging the Future - Innovation for Creative Inspiration
    BOSS forges into 2008 with an awe-inspiring lineup of effects, digital studios, and accessories.