361813-1110 User Manual

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English Installation and Operating Guide Page 17

pro.Bose.com Installation and Operating Guide

The following chart shows examples of the types of loads possible with the required output mode:

Loudspeaker Load Output Mode Channel Sharing PM8500 PM8250 PM4500 PM4250

2 - 8 Ω Mono (Low-Z) None 500 W @ 4 Ω 250 W @ 4 Ω 500 W @ 4 Ω 250 W @ 4 Ω

4 - 8 Ω V-Bridge (Low-Z) Half block 1000 W @ 8 Ω 500 W @ 8 Ω 1000 W @ 8 Ω 500 W @ 8 Ω

70V V-Bridge (70V) Half block 800 W @ 70V 400 W @ 70V 800 W @ 70V 400 W @ 70V

100V V-Bridge (100V) Half block 1000 W @ 100V 500 W @ 100V 1000 W @ 100V 500 W @ 100V

2 Ω, high power I-Share (Low-Z) Half block 1000 W @ 2 Ω 500 W @ 2 Ω 1000 W @ 2 Ω 500 W @ 2 Ω

4 Ω, high power Quad (Low-Z) Full block 2000 W @ 4 Ω 1000 W @ 4 Ω 2000 W @ 4 Ω 1000 W @ 4 Ω

70V, high power Quad (70V) Full block 1600 W @ 70V 800 W @ 70V 1600 W @ 70V 800 W @ 70V

100V, high power Quad (100V) Full block 2000 W @ 100V 1000 W @ 100V 2000 W @ 100V 1000 W @ 100V

Note: Conﬁgure the output mode of the ampliﬁer before connecting loudspeakers. See page 21 for details on front panel conﬁgu-

ration. Carefully follow the proper connection method for the selected output conﬁguration.

The wiring of the connector varies by ampliﬁer output conﬁguration. The output terminal assignments for Mono (single channel) and

V-Bridge conﬁgurations are printed on the rear panel of the ampliﬁer.

The following graphics illustrate wiring examples for the different output conﬁguration modes. Mixed combinations of Mono, V-Bridge,

and I-Share modes are possible from one output block.

Figure 6. Output wiring showing the four basic conﬁgurations

Mono mode

V-Bridge mode

I-Share mode Quad mode

Note: Changing the output conﬁguration may automatically place the unit in Standby Mode to allow the safe installation of loudspeaker

cable connections to the rear panel output terminal blocks.

Note: While not optimal, a 70/100V loudspeaker load can be driven off a single channel in Mono mode but is limited to 50 V RMS / 71 V

Peak capability. Download the application note “Using Mono Mode to Drive High Impedance Loudspeaker Loads” from pro.Bose.com

for details on how to adjust software and tap settings for this derated use.

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Bose 361813-1110 Professional PowerMatch PM4500N Power Amplifier with Ethernet Network Control 2RU