how much power rms at 8 ohms?

The manual mine came with "the 1000 Watt version" -- details it at providing 497 watts RMS at 8 ohms.

Anyone have an issue with the speaker out port not working?

First off , do you have a audio signal out from the receiver/ amp to the input of subwoofer? Please check wiring diagram of the manual it should work.

Does the SMP100 require a 12v trigger cable to work properly?

The SMP100 includes auto sensing that turns on the amp when an audio signal is detected then turns off automatically after 15 minutes when a signal is not detected, but it also has the manual on/off switch.

Will this work with a polk s35 center channel speaker?

Yes. But this amp would be overkill. Simply get an a/v receiver instead.

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🎬 Feel every beat, command every scene with SMP500 power!

SMART EFFICIENCY - Class D tech runs cool and efficient, ensuring reliable performance during marathon movie nights or gaming sessions.
SEAMLESS INTEGRATION - Low/high-level pass-through inputs/outputs and auto-sensing power on/off make setup effortless and flexible for any system.
PRO GRADE CONVENIENCE - Rack-mountable design with remote control and adjustable gain/volume limiter protects your gear and elevates your home theater.
POWERHOUSE PERFORMANCE - Delivers a commanding 400W RMS and 1000W peak for deep, room-filling bass that commands attention.
PRECISION BASS CONTROL - Variable high-cut filter and front panel knob let you tailor bass response and keep your main speakers crystal clear.

The OSD Audio SMP500DSP is a mono-channel Class D subwoofer amplifier delivering 400W RMS and 1000W peak power at 4 ohms. Featuring onboard DSP with a variable high-cut filter, it enhances bass clarity by routing higher frequencies to main speakers. Designed for high-wattage passive subwoofers, it includes adjustable gain, volume limiter, low/high-level pass-through, and auto-sensing power control. Rack-mountable and remote-controlled, it’s CE & ETL certified for professional-grade home theater sound enhancement.

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Item dimensions L x W x H	38.1 x 12.7 x 15.2 Centimeters
Voltage	220 Volts
Manufacturer	OSD Audio
Maximum Supply Voltage	2.2E+2 Volts
Mounting Type	Surface Mount
Brand	OSD Audio
Number of Channels	1
Output Power	4E+2 Watts
Package Type Name	cardboard box
Specification Met	ce,etl
Material	Metal
UPC	819603013177
Brand Name	OSD Audio
Speaker Type	Subwoofer, woofer
Colour Name	Black
Impedance	4 Ohm
Peak Power Handling - Speakers	1000 Watts
RMS Power Range - Amplifiers	400 Watts
Product Dimensions	38.1 x 12.7 x 15.24 cm; 3.63 kg
Item model number	SMP500DSP
Item Weight	3 kg 630 g

OSD Audio SMP500 Mono-Channel Class D Subwoofer Amplifier with Onboard DSP 400W 4 -8 Ohm

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