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F-15 is a Accuphase`s three-way crossover. It can be used in tri-amplified systems with three stereo amplifiers, or in a six mono amplifiers system. The F-15 can also be used for a two-way system by using the CB-2 Way Board and plugging it into the Mid-High frequency crossover socket. All the unit amplifiers used in the F-15 crossover employ the basic complementary-symmetry push-pull circuit in every stage with FET (Field-Effect Transistor) inputs and wideband transistor outputs. The crossover frequencies can be changed by using different plug-in type Crossover Frequency Boards. The F-15 also provides 0.5dB step precision level control, as well as an output and switching circuit to make up a subwoofer system.
Specifications: Gain – 0.5dB. Crossover Frequency: Selectable by Plug-in modules. Filter Slopes: - 12dB/Oct., - 18dB/oct. changeable on the crossover board. Input Impedance: 50K ohms. Output Impedance: Low. 100 ohms, Mid. 100 ohms, High: 100 ohms and Subwoofer: 1K ohm. Load Impedance: Low, Mid, High: 1K ohm minimum; Subwoofer: 10k ohm minimum. Level Adjustment: 0.5dB stepping type controls from 0dB to -20.5dB for respective audio passbands. Power Requirement: Voltage Selector for 100, 117, 220 and 240 Volts. (1) RCA Input. Remarks: Crossover boards included: CB-130 (Crossover frequency:130 Hz) and CB-2 Way (2 Way Board).
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