Dual direct box isolator, when loaded by the 1kohms input impedance typical of mic preamplifiers, this isolator has a 140kohms input impedance, making it ideal for high impedance sources. It can be used with or without an active buffer as a direct box for electric guitars or synthesizers. 30dB magnetic shielding is standard.
Converts unbalanced line levels to balanced mic level output
Stops hum and buzz problems in musical instrument hook-ups
Allows use of long cables without high frequency loss
High common-mode rejection 100dB at 60Hz
Excellent frequency response and time domain performance
Spec Sheet available - Yes
Operating Temperature (Maximum):
158 F
Operating Temperature (Minimum):
32 F
Input Impedance:
97 kohms (100Hz, -10dBu, test circuit 1)
Voltage Gain:
-38.6 dB (1kHz, 0dBu, test circuit 1)
Deviation from linear phase (DLP):
+1.2/-0 ° (20Hz to 2kHz, 4dBu, test circuit 1)
Distortion (THD):
0.036 % (20Hz, 4dBu, test circuit 1)
Maximum 20Hz input level:
21.5 dBu (1% THD, test circuit 1)
Common-mode rejection ratio (CMRR):
80 dB (60Hz, test circuit 2)
Output Impedance:
150 ohms (1kHz, test circuit 1)
Capacitances at 1kHz:
100 pF (primary to shield and case)
Transformer Turns Ratio:
11.52:1
Breakdown Voltage:
250 Vrms (primary or secondary to shield and case, 60Hz, 1 minute test duration)