NOTE: This is NOT a multichannel system – if you want to record multiple channels, look at this system instead.
Mixer instruction manual click here
The SP-MIXER-4 is a small but versatile mini mixer, perfect for court reporting applications. Unlike other mixers supporting only standard microphones, this mixer allows you to simultaneously make use of 4 audio input for microphones of different kinds, including those with the common 3.5mm (1/8″) miniplugs. The mixer supplies power for all Sound Professionals microphones that have a 3.5mm plug.
Specifications :
| Gain | 45dBm |
| Current consumption | 300mA (max) |
| Power supply | USB 5V/1A Adaptor |
| Dimensions | 100 x 80 x 15 mm/3.9″ x 3.1″ x 0.6″ |
| Weight | 120 g / 4.2 oz (body) |
In the box:
- 5V/1A Adaptor x 1
- USB power cable x 1
- USB data cable x 1
- TRRS to TRS Adaptor (for headsets with 4 pole male plugs) x 1
- Owner’s Manual x 1








Sylvia M from CA – United States –
Sylvia M from CA – united states | 22 Jul 2023
Excellent product. I used it yesterday. Thank you for the tech support. Very knowledgeable.
Miah Parson (verified owner) –
Chris was excellent, very helpful. I work in the courtroom which is a pretty good size and literally can hear everything! Game changer worth every penny to know I have this