Overview
The RU-MX4 is the ideal choice in many applications where a combination of balanced mic and/or unbalanced line-level signals needs to be mixed. Balanced connections use XLR connectors. Unbalanced signals are coupled through phono jacks. Each of the four inputs can accept either a balanced XLR mic or an unbalanced line-level input. 24 V phantom is individually switch selectable for each mic input. The unbalanced phono jack LINE OUTPUT from one RU-MX4 may connect to the unbalanced input of other equipment, or may be connected to the DIRECT input of another RU-MX4 to expand mixing capabilities. The RU-MX4 provides one balanced output, switchable for mic or line level. Audio levels are adjustable on the front panel. Each input channel is equipped with a front-panel dual-LED VU meter that follows standard VU ballistics. The final mix is displayed on an LED string VU meter featuring a visually comfortable arc motion. A rear-panel switch allows the soft-knee compressor to be switched in or out. A factory installed output isolation transformer is available by ordering the RU-MX4T.
Features
- Four Channel Audio Mixer with Expansion Capability
- XLR Microphone Inputs, Phono Jack Line Inputs
- Switchable 24 V Phantom for Each Mic Input
- Mic or Line XLR Output, Switchable
- Unbalanced Line Output and Direct Input
- Integral Compressor/Limiter, Switchable
- Studio-Quality, Low-Noise Performance
Specifications
| Microphone Inputs (4) | 2 k? balanced, switchable 24 V phantom (IEC 61938: 2013) |
| Mic Input Level for +4 dBu output | -58 to ?20 dBu (PHANTOM OFF or ONHI gain); -41 to ?4 dBu (PHANTOM ON LO gain) |
| Line Inputs (4) | 2 k? unbalanced |
| Line Input Level for +4 dBu out | -25 dBV to +20 dBV, -10 dBV nominal |
| Gain Adjustments (5) | Mic: Off to 62 dB gain (PHANTOM OFF ONHI gain); Off to 46 dB gain (PHANTOM ON LO gain); Line: Off to 27 dB gain |
| Output Attenuator | 0 dB to infinity |
| Frequency Response | Mic: 80 Hz to 30 kHz (± 1.5 dB), <-10 dB @ 20 Hz (integral high-pass filter) Line: 20 Hz to 30 kHz (± 0.25 dB) |
| THD+N | Mic: < 0.1% (80 Hz to 20 kHz) Line: < 0.02% |
|
Residual Noise (wideband, below +4 dBu output): | |
| Unity Gain | < -84 dB (4 Line level sources) |
| 40dB Gain, Phantom on | Mic: -79 dB; < -73 dB (All 4 mic level sources) |
| 50dB Gain | Mic: -79 dB; < -73 dB (All 4 mic level sources) |
| 60dB Gain | Mic: -70 dB; < -64 dB (All 4 mic level sources) |
| Outputs (2) | +4 dBu 150 ? bal. (switchable to MIC level -45 dBu); -10 dBV unbalanced |
| Indicators (18) | Dual-LED VU meter for each input; COMP/LIMIT active LED; POWER LED; LED audio mix meter, 0 dB = +4 dBu VU (dB): -20, -10, -6, -2, 0, +3; Peak Reading (dB): +8,+12 |
| Ambient Operating Environment | 0° C to 50° C |
| Power Requirement | GROUND-REFERENCED, 24 Vdc @ 150 mA |
| Package Type | Cardboard Box |
| Package Dimensions | 6 x 6 x 2.625 in. |
| Shipping Weight | 1.63 lbs. |
| WEEE weight | 1.38 lbs. |
| Tariff code | 8518.40.2000 |