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

Product ID: 366155618

Details

Item dimensions L x W x H
38.1 x 12.7 x
Voltage
220 Volts
Manufacturer
OSD Audio
Maximum Supply Voltage
2.2E+2 Volts
Mounting Type
Surface Mount

⚡400W RMS Power

🔄Auto On/Off Signal Sensing

🎚️Variable High-Cut Filter

Description

🎬 Feel Every Beat: Power Your Passive Subs Like a Pro

SMART EFFICIENCY - Class D tech keeps the amp cool and efficient under heavy loads, ensuring reliable performance without overheating.
POWER THAT MOVES YOU - Delivers a commanding 400W RMS with 1000W peak for deep, room-shaking bass that transforms your home theater experience.
SEAMLESS INTEGRATION - Low and high-level pass-through inputs/outputs plus a remote control for flexible setup with both modern and legacy systems.
PRECISION BASS CONTROL - Variable high-cut filter and front panel knob let you tailor bass response and seamlessly blend subs with your main speakers.
PLUG PLAY CONVENIENCE - Auto-sensing power on/off feature means the amp powers up only when needed, saving energy and extending component life.

The OSD Audio SMP500DSP is a mono-channel Class D subwoofer amplifier delivering 400W RMS at 4 ohms with a 1000W peak, designed for high-wattage passive subwoofers. Featuring a variable high-cut filter, front panel controls, and auto-sensing power on/off, it enhances bass precision and overall surround sound quality. Rack-mountable and CE/ETL certified, it supports flexible input/output options and includes a remote control, making it ideal for dedicated home theater and media room setups.

Specifications

ASIN	B07F94FSLF
Box Contents	1
Brand Name	OSD Audio
Customer Reviews	4.1 4.1 out of 5 stars (30)
Item Type Name	Subwoofer Amplifier
Item Weight Unit of Measure	8 Pounds
Manufacturer	OSD Audio
Manufacturer Part Number	SMP500DSP
Model Number	SMP500DSP
Number of Items	1
Unit Count	1 Count
Warranty Description	2-Year Warranty

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