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Knowledge Base > Discontinued Products > 372 SPL Computer

When do I need to use an external relay on my 372 SPL Computer?

When controlling amplifiers larger than 200 watts (8-ohms), you must use an external DPDT relay. The 372 SPL Computer’s internal relay cannot handle more than 8-amps of load current. The recommended maximum amplifier wattages are as follows: 300 watts at 70V, 200 watts at 8-ohms, and 100 watts at 4-ohms. The 24-volt version of the Potter & Brumfield PRD11DGO works well. Its DPDT contacts are rated at 30 amps.

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