• Any input to Speaker output 20–22000 Hz
Crosstalk, 1 kHz
• Amplifier Ch1/Ch2 < -85 dB
• Channel to channel < -78 dB
Microphone mute switch attenuation > 100 dB
Channel VOL and FX/AUX send attenuation > 85 dB
CMRR, MIC input, 1 kHz > 80 dB
Input sensitivity, all level controls in max. position
• MIC -65 dBu (435 μV)
• LINE (mono) -45 dBu (4.35 mV)
• LINE (stereo) HI: -27 dBu (34.6 mV), LO: -11 dBu (218 mV)
• CD (stereo) -27 dBu (34.6 mV)
Max. level, mixing desk, input VOL down, output VOL up
• MIC inputs, GAIN at min. position +11 dBu
• Mono line inputs, GAIN at min. position +30 dBu
• Stereo line inputs +26 dBu
• PHONES output +21 dBu
• MASTER A, B, AUX outputs +11 dBu
Input impedances
• MIC 2 kΩ
• CD 10 kΩ
• All other inputs > 15 kΩ
Output impedances
• PHONES 47 Ω
• All other outputs (impedance balanced) 150 Ω
Equivalent input noise, MIC preamp, A-
weighted, max. gain, 150 Ω
-129 dBu
Noise, channel inputs to MASTER A L/R outputs, MBW = 22 kHz, A-weighted
• MASTER VOLUME down -99 dBu
• MASTER VOLUME center, all channel
volume down
-90 dBu
• MASTER VOLUME center, all channel
volume center
-85 dBu
Signal-to-noise ratio, power amplifier, A-
weighted, 450 W, 4 Ω
104 dB
34 en | Technical data PM 502
15-May-14 | 02 | F01U297804 User manual Bosch Sicherheitssysteme GmbH
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