The FP-MX4 is a single-channel audio mixing module featuring four identical inputs. Each input accepts either a mic or line level source. The output section provides four mixing potentiometers corresponding to the four inputs. The output section provides both a balanced line (+4 dBu) and balanced microphone level (-45 dBu) output. Both outputs may be used at the same time. The four mixing potentiometers are intended to be set at installation or to be adjusted occasionally. Levels may be adjusted at the mixer using the RDL dual-LED VU meter which displays the mixer output level.
| Microphone Inputs (4): | 2 kΩ balanced, switchable 24 V phantom (IEC 1938: 1996-12) |
| Microphone Input Level: | Switch selectable ranges: -30 to -40 dBu, -40 to -50 dBu, < -50 dBu |
| Line Inputs (4): | +4 dBu, 10 kΩ balanced (or unbalanced) |
| Gain: | |
Mic:
Line: | Off to 65 dB gain (adjustable each input)
Off to 6 dB gain (adjustable each input) |
| Frequency Response: | |
Mic:
Line: | 10 Hz to 30 kHz (+/- 0.25 dB)
10 Hz to 45 kHz (+/- 0.25 dB) |
| THD+N: | |
Mic:
Line: | < 0.012%
< 0.004% |
| Residual Noise (below +4dBu output): | Note, (A) = A-Weighted |
| Unity Gain: |
4 Line level sources
< -84 dB (wideband) |
| 40dB Gain: | Mic: -90 dB; All 4 mic level sources:
< -82 dB (wideband); < -84 dB (A) |
| 50dB Gain: | Mic: -86 dB; All 4 mic level sources:
< -72 dB (wideband); < -76 dB (A) |
| 60dB Gain: | Mic: -80 dB; All 4 mic level sources:
< -65 dB (wideband); < -67 dB (A) |
| Outputs (2): | |
Line:
Mic: | +4 dBu 150 Ω balanced
-45 dBu 150 Ω balanced |
| Indicators (2): | Dual-LED VU meter (line-level output) |
| Power Requirement: | GROUND-REFERENCED, 24 Vdc @ 160 mA |
| Overall Dimensions: | |
| Height: | 1.42 in. 3.61 cm |
| Width: | 3.25 in. 1.42 in. |
| Length: | 8.14 in. 1.42 in. |
| Ambient Operating Environment: | 0° C to 50° C |
