IPA™ 4250

Multi-Channel Mixer Amplifier – Constant Voltage 25V, 70V, 100V & Low-Z


The Crest Audio® IPA™ 4250 power amplifier is designed to connect quickly and easily to the Crest Audio PZS™ 8250 powered zone mixer amplifier and provide four additional channels of efficient Class D audio amplification for the PZS 8250 output channels 5, 6, 7 and 8. The IPA 4250 can also be used as a standalone four-channel power amplifier using four electronically balanced line inputs.

The IPA 4250 includes an RJ45 jack on its rear panel to receive signals from channels 5 – 8 of the connected PZS 8250 via a single cable. Audio inputs can also be made to each channel via each of four electronically balanced line inputs with Euro-style connectors. Each of the four amplifier outputs can be configured individually for low-impedance @ 4 Ohms, 25V, 70V or 100V constant voltage operation. The power amplifier section includes SPS speaker protection system circuitry and a highpass filter to protect speaker transformers from low-frequency overload.

The IPA 4250’s front panel includes a power LED as well as Signal and SPS speaker protection system indicator LEDs for each channel.

The IPA 4250 is housed in a rack-mountable 2U steel chassis and features a voltage selector switch for 120V or 240VAC operation.

Features IPA 4250

• Four channel Class D power amplifier with 250 Watts per channel

• SPS speaker protection system

• High-pass filter to protect speaker transformers from low frequency overload

• 2U rack-mount chassis

• Power, signal and SPS speaker protection system indication LEDs

• RJ45 4 channel input connector for simple connection to PZS 8250 outputs 5 – 8

• Four electronically balanced Mic/Line inputs with Euro-style connectors

• 4 Ω, 25V, 70V or 100V outputs, configurable per channel

• Line voltage switch for 120V or 240VAC operation

• Power switch

Additional information

Channels (Input)


Channels (Output)


Power per Channel @ 4 Ω

250 W

Power per Channel @ 25V

250 W

Power per Channel @ 70V

250 W

Power per Channel @ 100V

250 W


Class D

Minimum Load Impedance

4 Ω

Input Connectors

4 x 3-pin Euro Connector

Output Connectors

4 x 5-pin Barrier Strips


Rack Mount (19")

Yes (2U)

Product Height

3.45" (88 mm)

Product Width

19.00" (483 mm)

AC Power Input

Dual Voltage – 120VAC or 220-240VAC 50/60 Hz



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