For sale is an ultra high quality world class Viola Quartet Mono Electronic Crossover.
This unit is brand new in sealed box. Take them out for photo taking only. It belongs to an owner that purchases a full range speaker later that does not need a separate crossover. It is not in his plan. Thus, the crossover is for sale.
The Quartet is a high quality mono electronic crossover intended for use with speaker systems with up to 4 bands. The Quartet uses linear phase filters with a cut-off rate of 12, 24, 36, or 48 dB per octave. Other frequencies are available to special order and use of plug-in filter cards allow unit to be quickly and easily reconfigures. Cards are fully discrete class A designs and have a cut-off rate of 12dB/octave.
It is standard configuration the channel frequencies may be set by user as below:
Low Pass: 300Hz or 500Hz
Low Band Pass: 300Hz or 500Hz up to 5kHz or 7kHz
Band Pass: 5kHz or 7kHz to 15kHz
High Pass: Over 15kHz
- Inputs: 1 RCA, 1 XLR
- Outputs per band: 1 RCA, 1 XLR
- Input impedance: 1M ohm
- Frequency response: 20Hz to 20kHz +/- 0.1 dB
- Less than 0.005% 20kHz 1v input
- Noise: -95dB
Low noise hybrid type potentiometers are used for the output level controls. Each control is fitted with a 10 turn vernier dial allowing extremely accurate setting and it lockable for long term stability.
A choke input type power supply housed in a separate chassis is used to provide a very clean and stable power source for the pre-amplifier. It also provides isolation from Electro-Magnetic Interference.
Like the OTA gain stages, the filters are also built as plug-in modules. They are fully balanced throughout, class A designs and are constructed using discrete components, including ultra-high precision (0.1%) thin film resistors. A linear phase design to ensure the phase integrity of the signal is preserved across the audio band.
On audio design, the main audio circuitry is constructed on a single large mother board which accommodates the local power supply sections and input for input and output connectors. This construction gives the shortest possible signal path and eliminates the variations in performance that can occur when external cable forms are used.
More information can be found on the net in Location Sound website.
Unit is currently set in 230 voltage 50/60Hz. It can be set to 115 voltage use.
Will ship worldwide using economy courier service.
Payment by wire transfer is preferred. Accept Paypal if buyer cover 5% for paypal fee.
More pictures are available for serious buyer only.
Unreasonable offer will be politely ignored.
Thanks for looking.