Electro-Voice PA1250T User Manual

100V

25W

100V

25W

16 x 25W

100V

66 x 6W

PA2450L & PA4150L
Loudspeaker systems connected to channels A and B (or C and D) have to be

connected according to the polarity indicated. Please, make sure to mind the

minimal impedance of 4 ohms per channel.

For bridged operation, the load has to be connected according to the BRIDGED-

label and the Mode switch needs to be set to “Bridged”. Please, make sure to

keep in mind that in Bridged Mode the minimal impedance is 8 ohms and that

the input audio signal has to be fed to channel A (or C).

REAR PANEL

Loudspeaker Outputs
The speaker output jacks are suitable for connecting speaker cables with a maximum diameter of 2.5

. The provided screwlock connectors can be screwed to the power amp to prevent inadvertent

disconnection. Power amps offer low impedance outputs and / or floating outputs (ISOLATED

OUTPUTS) with nominal voltages of 50V, 70V and 100V, depending on the amp model.

Caution: The symbol of a FLASH at the loudspeaker connectors indicates that these outputs

may carry high voltages which, when getting in contact with, can cause serious harm.

Establishing connections at these outputs is only permissible for persons who have

been instructed on how to do so. Otherwise use prefabricated cables only.

PA1250T, PA2250T & PA2400T
Integrated audio output transformers convert the power amp’s nominal output voltage to 50V, 70V and

100V. The amplifier models PA2250T and PA2400T present all voltages simultaneously at the floating

outputs so that the power amp channels can be used in any combination of possible output voltages.

Mixed operation of low-impedance speaker systems and floating loudspeaker lines on a single power

amp channel is possible as well.

The use of loudspeaker systems with 100V or 70V matching transformers to reduce the effects of cable

loss is recommended when the distance between power amp and speaker systems exceeds 165 feet.

In addition, this also facilitates distributing the output power among loudspeakers.

As many loudspeaker systems as possible can be connected, as long as the speaker network’s overall

power consumption does not exceed the power amp’s rated output power while at the same time not

falling below the nominal load impedance of the power amp outputs. Please refer to specifications in

the appendix for individual values of the rated output power and nominal load impedance of power amp

outputs.

Configuration example: PA2400T with 100V speaker systems connected.

Maximum working loads with 25W/100V and 6W/100V loudspeaker systems.