Legacy Products

311 – 2way Crossover w/ Subwoofer Out


The 311 Crossover may be used as a stereo 2-way crossover network and has the addition of the subwoofer output for low-end frequency reinforcement. It employs 24dB / octave state-variable, Fourth-order Linkwitz-Riley filters that guarantee properly phased outputs at all frequencies which is optimal for the proper acoustic summing of common signals from adjacent drivers in the crossover region. Each channel features independent high and low output level controls and a crossover frequency rotary control which covers a wide range (250hz to 6khz). All three outputs have a 30 cycle low cut switch to eliminate low-end rumble. The subwoofer features an independent output level and rotary control for frequencies in the 50hz to 250hz range.

Key Features


Controls CMRR: >75dB (typical @ 1kHz)
Crossover Filters Fourth-order Linkwitz-Riley, 24dB/octave, state-variable
Crossover Frequency Ranges 250Hz to 6kHz
Dynamic Range > 114dB
Filter Type SUBWOOFER: Two-pole Butterworth, 12dB/ octave
Frequency Response 10Hz to 40kHz, +/-.5dB
Input Impedance 100K Ω
Input/Output Connections XLR: 1/4in TRS, balanced – 1/4in: TS, unbalanced
Maximum Input Level +21dBu
Maximum Output Level +21dBu
Output Impedance 220 Ω
Power USA: 110 -125V AC/50 – 60hz/15 W
Power Requirements 110-125V AC/50-60hz/15W (USA)
Range SUBWOOFER: 50Hz to 250Hz
Signal to Noise Ratio >95dB, Ref: 0dBu, 20Hz to 20kHz, unweighted
Total Harmonic Distortion <0.01% (20Hz-20kHz, 0dBu)
Dimensions 5.5″ D x 19.0″ W x 1.75″ H
Weight 4.85 lbs (2.2 kg)