Pro Co DB-1 Direct Box

No gimmicks or frills, just the right stuff.

Floating transformer-balanced XLR output for maximum isolation. SPKR Mode handles amplifiers up to 600W RMS. Hi-cut filter reduces distortion. A ground lift eliminates hum and buzz. Rugged Uni-box construction. Switches and connectors are recessed to prevent damage. Passive design requires no batteries or phantom power.

Pro Co DB-1 Direct Box Features:

Floating transformer-balanced XLR output for maximum isolation
SPKR Mode handles amplifiers up to 600W RMS
Hi-cut filter for reduced distortion
Ground lift
Rugged Uni-box construction
Recessed switches and connectors
Passive design requires no batteries or phantom power
FREQUENCY RESPONSE:
20Hz-20kHz, ±.5DB @ -15dBv output
-3dB @ approximately 85kHz
Filter mode introduces 6dB/octave attenuation above 4.0kHz

TOTAL HARMONIC DISTORTION:
Less than .03% 20Hz-20kHz @ -30dBv output
Less than .1% 30Hz-20kHz @ -15dBv output
Less than .25% 20Hz-20kHz @ -15dBv output

PHASE RESPONSE:
Less than -18° @ 20kHz (ref. 1.0kHz)

RISE TIME:
Less than 4.5 microseconds (2.0kHz square wave, 10%-90%)

INPUT IMPEDANCE:
Greater than 130 kohm @ 1.0kHz (INST mode)
Greater than 105 kohm @ 10kHz (INST mode)
(Nominal source impedance is 20 kohm)
Approximately 8.2 kohm (SPKR mode)
(Nominal source impedance is 0 ohm)

OUTPUT IMPEDANCE:
Less than 200 ohm @ 1.0kHz
Less than 215 ohm @ 10kHz
(Nominal load impedance is 1.0 kohm)

VOLTAGE STEPDOWN:
Less than 22dB @ 1.0khz (INST mode)
(SPKR mode attenuates signal by 20dB)

MAXIMUM INPUT LEVEL @ 50Hz FOR 1% THD:
+16dBv (INST mode), +34dBv (SPKR mode) @ 20Hz
+21dBv (INST mode), +41dBV (SPKR mode) @ 30Hz
+26dBv (INST mode), +46dBv (SPKR mode) @ 50Hz