I have Behringer PMP4000 power mixer. I am considering buying two passive fullrange speakers Behringer B1520 Pro Eurolive.
According to the speakers specification they are
- 8 ohm, with power rating 300 W RMS and 1200 W peak.
Power mixer has to "powered" outputs. According to specification (page 20) it can output:
- 8 ohm, 300 W RMS and 400 W peak per channel
- 4 ohm, 600 W RMS and 800 W peak per channel
Thus, to my understand the two speakers fit the setup perfectly.
However, I consider getting a passive subwoofer or a passive monitor as well (the mixer supports a special mode where the powered outputs volume can be controlled separately). Let's for an example consider this subwoofer (again, we are doing it purely for exercise purpose, I am not aiming for this model). According to the specification the subwoofer:
- 8 ohm, with power rating 300 W RMS and 1200 W peak.
Do I understand correctly, that if connect the two speakers in parallel (that is connect mixer to one speaker, and connect the second speaker to the first one) and add the mentioned subwoofer, the power mixer should handle everything? To my understanding, two connected speakers will drop the impedance to 4 ohm while increasing the power need twice (300 W RMS * 2 = 600 W RMS). And the other mixer power output can still feed the subwoofer with 8 ohm and 300 RMS? Or both mixer outputs should have the same impedance?
Can someone also clarify the demo picture on page 14 in the mixer specification? They connect in parallel two Behringer B1800X (8 ohm, 450 W RMS, 1800 W peak) and Behringer B1220 (300 W RMS, 1200 W peak). To me it does not make much sense since the power mixer is not powerful enough to power that setup.