mixing console or other low impedance input.
Connect the unbalanced 1/4” tip-sleeve output to a
high impedance input (if desired) .
• Set the ground lift switch to the position with the least
amount of hum or noise.
Block Diagram AC265
Specifications of the AC 265
Low Impedance In/Output: 600 ohms center tapped
(balanced).
Low Impedance Connector: XLR type jack
High Impedance In/Outputs: 50K ohms (unbalanced)
High Impedance Connectors: 2 -1/4 inch mono phone
jacks.
Attenuation Range Switch: 0,12,40 dB attenuation
Frequency Response: 60 to 15 kHz, ±3 dB
AC 275 Active Direct Box
Features of the AC 275
• Allows a hi impedance unbalanced source to directly
feed a low impedance balanced input.
• Connects guitar pickups, microphones or electric
instruments to a recording or P.A. console without
audio quality loss.
• Input signal isolation using FET input operational
amplifiers that reduce loading effects normally found
XLR
GND LIFT
BLUORG
WHT GRN
50K
47K
4.7K
470Ω
YEL
600Ω
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