The SPA-4 is certainly one of the simplest and inexpensive high quality mixers for zoning applications in small and medium size commercial installations. It is an ideal solution for bars, restaurants, retail outlets, offices, and all other venues where up to four different areas need to be controlled individually.
The SPA-4 is very easy to use. No computer, no software, no sophisticated technology, just an analog device with simple and intuitive settings. Every single source from channel 1 to 5 can be routed to one of the four outputs just by pressing a switch. The control of the signal input is limited to high and low EQ plus gain and volume. In case of long distances between de device and the line speakers, it is possible to monitor the signal send to each output through a dedicated speaker terminal on the rear panel.
The four main inputs feature Combo connectors with balanced Mic/Line level. A switch can select the type of source and a phantom power for electret microphones. Two RCA connectors are used for the stereo signal of the channel 5.
Line outputs are available on Euroblock connectors for easy interfacing with other installed equipment.
The SPA-4 is equipped with a simple paging function triggered by microphone 1 or by a tel. signal. Priority can also be activated with a contact switch for microphones 1, 2 and 3 as well.
| MODEL |
SPA-4 |
| Frequency Response |
20 Hz – 22kHz ± 2 dBu |
| Max. Input Gain |
60dB CH MIC. Input Main out (XLR, balanced) |
| 50dB CH MIC. Input & REC. out (unbalanced) |
| 60dB CH MIC. Input Mic. out (unbalanced) |
| 60dB CH MIC. Input Mono out (unbalanced) |
| THD & N (1 kHz) |
<0.03% |
| Main Voltage |
220~240VAC / 110~120VAC 50/60Hz or 24VDC |
| Impedance |
Microphone input: 1.4kΩ |
| All other inputs: 10kΩ or greater |
| All other outputs: 120Ω |
| Phantom power |
15V |
| EQ |
Low: ± 10 dB - 100 Hz |
| High: ± 10 dB - 10 kHz |
| Monitor output |
1 W rms / 8 Ω |
| Headphone output |
0,5 W rms / 47 Ω |
| Connectors |
Inputs: Combo XLR/¼ Jacks, RCA |
| Outputs: Euroblock, Screw terminals |
| Dimension (W x D x H) |
483 x 15 x 132 mm (19’’ x 7.5’’ x 5.1’’) |
| Weight |
2.9 kg (6.63 lbs) |
