Pro Audio Processors & Accessories

Choose 31 bands when you need finer steps across the spectrum, and 15 bands for broader, quicker adjustment. The CEQ231 is a dual 31-band graphic equaliser in a 19in 2U space, and the 170.923UK (CEQ215) is a dual 15-band unit at 2/3 octave ISO spacing in 1U, with up to 12dB of cut or boost. The CEQ231 and 170.923UK each have a bypass switch, a low-cut switch and LED VU meters.

An active crossover splits the signal before the amplifiers, sending low frequencies to the amplifier driving the sub cabinets and mid/top frequencies to the amplifier driving the tops. The 170.929UK (CX23) is 2-way stereo or 3-way mono, and the 170.932UK (CX34) is 2 or 3-way stereo or 4-way mono. The 170.929UK and 170.932UK each have a 40Hz ultra-low frequency cut, a phase invert function and XLR connections.

A speaker management system is a DSP unit that combines crossovers, EQ and limiters so a designer can tailor the amplifier outputs to the speakers they drive. The 170.665UK has 2 inputs and 6 outputs, a 96kHz 32-bit floating point processor, 8-band EQ on inputs and outputs, and L-R, Bessel or Butterworth crossovers, controlled from the front panel, USB software or the network.

The Bose Professional ControlSpace EX conferencing processors are designed for meeting rooms. The 834315-2110 (EX-440C) has four mic/line inputs, 8-channel acoustic echo cancelling, VoIP, PSTN, USB and 16 x 16 Dante for small to medium rooms. The 772234-2110 (EX-1280C) has 12 acoustic echo cancellers, 2-line VoIP and 64 x 64 Dante, and one unit can support several rooms.

You need one where mains noise from lighting or dimmers reaches the audio. The 776.498UK filters RFI/EMI interference from sources such as fluorescent lights and certain dimmers, adds surge and voltage spike protection, and feeds 8 rear IEC outlets up to 10A through a circuit breaker. For simple power sharing, the 776.496UK distributor has surge protection and a digital voltmeter that shows the incoming line voltage.

A turntable with a magnetic cartridge gives a phono signal that must be raised to line level before it reaches an amplifier. The 128.513UK is a compact stereo preamp that does this to match the line or CD input of an amplifier. It runs from the included UK mains adaptor or a 9V battery, and has a grounding screw to cut noise.