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Introduction Congratulations, and thank you for your purchase of the DOD direct box. The AC 260,265,275, and 285 all solve distortion problems normally associated with using high impedance sources with low impedance inputs. The product line begins with the AC 260 which is a basic easy to use direct box and progresses into the AC 285 with a cabinet emulator.
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600Ω CT 50KΩ 1/4" Hi Z Block Diagram AC260 Specifications of the AC 260 Low Impedance In/Output: 600 ohms center tapped (balanced). Low Impedance Connector: XLR type jack. High Impedance In/Outputs: 50KΩ. High Impedance Connectors: 2- 1/4” mono phone jacks...
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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. GND LIFT 600Ω...
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on passive direct boxes. • Flat frequency response. • Operates with battery or phantom power. • Ground isolation switch. • Internal pad for speaker level input. Operation of the AC 275 • Connect the output of the high impedance source to the input of the AC275.
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Gain: Inst: -12dBu Spkr: -40dBu Input Impedance: Instrument 1.3MΩ Speaker 10kΩ Output Impedance: 200Ω Power Requirements: 9V battery or 15-48V phan- tom power Distortion(1kHz, Inst @-10dBV input): <0.02% Signal-to-Noise Ratio (Inst @-10dBV input): Better than 86dB Maximum Input: Instrument Position: +7dBu (9V battery) +5dBu (15V phantom) +20dBu (48V phantom)
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amplifiers that reduce loading effects. • Flat frequency response. • Operates with battery or phantom power. • Ground isolation switch. • Internal pad for speaker level input. • 4x12 emulator cabinet that gives a more enhanced low end. • Twin open-back combo that provides a brighter sound with less low end.
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> 1 megΩ Spkr: >200 kΩ Output Impedance: 200Ω Power Requirements: 9V Battery 15-48V Phantom 9V AC Adapter (DOD PS3) THD (1kHz, Inst @ 0dBu, 9V batt): <0.08% Signal to Noise Ratio (Inst @ -10dBu, 9V): Flat: >86dB Spkr Emulation: >80dB...