Translational mixer amplifier REC SM5120

The company “REC” has developed and launched into production translational mixer amplifier SM5120. The number of inputs in a mixer section is five, and the output power is 120 watts. The device is dedicated for functioning in 100 volt networks of small systems of background sound. The main functional feature of SM5120 is the possibility to connect external power amplifiers through the balanced output SLAVE, and the signal can be taken as to the volume control, and after (for this there is a separate switch PRE / POST). 

This function is relevant if the mixer amplifier is connected by several additional power amplifiers in parallel: it keeps them very convenient to change the volume of the entire amplifier system with a single regulator for SM5120. The device is equipped with a handy set of additional features: switchable phantom power on all microphone inputs, switchable sound activation priority of input 1, controlled volume signal "Bim-Bom", the inclusion of an emergency priority of input 1 with an external control signal ("dry contacts").




The main technical features:

Parameter nameSM5120
1.Nominal output voltage, V 50; 100
2 Power output with limited distortion, W, not less 120
3 Nominal load impedance, Ohm: – on output 50 V – on output 100 V
20,8 83
4 Full input impedance on the inputs INPUT 1–4, kOhm, not less: – MIC – LINE   0,6 5
5  Full input impedance on the inputs INPUT 5, kOhm, not less: 10
6 Minimal source EMF on INPUT 1–4, mV, not more than: – MIC – LINE   1,5 100
7 Minimal source EMF on INPUT 5, mV, not more than 200
8 Full output impedance on outputs MIXER OUTPUTS (LINE, SLAVE), Ohm, not more 600
9 Voltage on the outputs MIXER OUTPUTS, V, not more than: – LINE – SLAVE   1 1,23 (+4dBu)
10  Minimum-allowable load impedance on outputs        MIXER OUTPUTS (LINE, SLAVE), kOhm 1
11 The limits of bass control (100 Hz) and treble control (10 kHz) dB, not less ±10
12 Effective audio band, the limited gain, Hz, not narrow 50 ... 16000
13 Diversity of frequency characteristic amplification in the effective audio band (at center position of regulators the bass and treble control), dB, not more than 3
14 Total harmonic distortion at the output of the audio band in the effective nominal power output,%, not more than 1
15  Signal-to-noise ratio at nominal output voltage, dB, not less 65
16 Phantom power voltage, V 15±10%
17 Protection degree IP20
18 Total dimensions, mm, not more than 483х245х96
19 Weight, kg, not more than 5
20 Alternating-current power, VA, not more than 240