OSD Audio - SMP300 Mono Class D Subwoofer Amplifier, 500W Peak, Rack Mountable, Auto Sensing - Black
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About this product
The SMP300 is a Class D mono subwoofer amplifier delivering up to 500W peak power at 4 ohms and 250W continuous RMS, built for passive subwoofers such as in-wall models that require external power. At only 3 inches high it fits inside any equipment rack or cabinet and includes 1U rack mounting hardware. A front-panel variable low-pass filter adjusts from 35Hz to 180Hz to control the overlap between the subwoofer and main speakers, while variable phase control from 0 to 180 degrees fine-tunes alignment so bass reinforces rather than cancels. Front-panel volume completes the setup controls. Multiple connection options include LFE input plus line-level and speaker-level inputs, covering both newer receivers and older source equipment. Auto-sensing shuts the amplifier down when no signal is detected, and the power supply is switchable between 120V and 230V. Frequency response spans 20Hz to 160Hz within 1dB with a 95dB signal-to-noise ratio. ETL and CE certified with a 2-year warranty.
Features
500W Peak, 250W RMS at 4 Ohms
Class D amplification supplies 250W RMS at 4 ohms and 150W RMS at 8 ohms with 500W peak output, providing continuous stable power for in-wall and stand-alone passive subwoofers. The extra headroom over smaller sub amps keeps bass accurate during demanding movie soundtracks rather than compressing at peaks.
Variable Low-Pass Filter, 35Hz to 180Hz
A front-panel variable low-pass filter sets the subwoofer's upper frequency limit anywhere from 35Hz to 180Hz. Controlling the overlap between the subwoofer's upper range and the main speakers' lower range produces balanced, seamless sound instead of a doubled or hollow midbass region.
Phase and Volume Control on the Front Panel
Variable phase adjustment from 0 to 180 degrees aligns subwoofer output with the main speakers so the two reinforce each other. Front-panel volume sets the amount of low-frequency effect. Both controls are accessible without pulling the unit from the rack, which speeds up room tuning.
LFE, Line-Level and Speaker-Level Inputs
Three input types cover the full range of source equipment: a dedicated LFE input for modern AV receivers, line-level RCA for pre-amplified sources and speaker-level inputs for older receivers without a subwoofer output. One amplifier works across new and legacy systems.
1U Rack Mountable with Auto Sensing
At 16.25 by 3 by 9.25 inches and 7 pounds, the amplifier occupies a single rack space with mounts included, or sits in a cabinet. Auto-sensing shuts the unit down when no signal is present. Dual voltage switchable 120V/230V, 95dB signal-to-noise, 20Hz to 160Hz response. ETL and CE certified, 2-year warranty.
Specifications
- Continuous Watts x Channel @ Ohms250W x 1 @ 4 Ohms; 150W x 1 @ 8 OhmsNumber of Channels1Number of Audio Zones1Network Connector(s)No network connectors
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The SMP300 is a Class D mono subwoofer amplifier delivering up to 500W peak power at 4 ohms and 250W continuous RMS, built for passive subwoofers such as in-wall models that require external power. At only 3 inches high it fits inside any equipment rack or cabinet and includes 1U rack mounting hardware. A front-panel variable low-pass filter adjusts from 35Hz to 180Hz to control the overlap between the subwoofer and main speakers, while variable phase control from 0 to 180 degrees fine-tunes alignment so bass reinforces rather than cancels. Front-panel volume completes the setup controls. Multiple connection options include LFE input plus line-level and speaker-level inputs, covering both newer receivers and older source equipment. Auto-sensing shuts the amplifier down when no signal is detected, and the power supply is switchable between 120V and 230V. Frequency response spans 20Hz to 160Hz within 1dB with a 95dB signal-to-noise ratio. ETL and CE certified with a 2-year warranty.
The SMP200 is a compact Class D mono subwoofer amplifier built to power passive subwoofers in home theater and whole-house audio systems. It supplies 120W RMS at 8 ohms with 240W peak, or 200W RMS at 4 ohms with 400W peak, giving in-wall and stand-alone passive subs the power they need for low-frequency impact on movie and music soundtracks. An advanced crossover circuit adjusts from 35Hz to 160Hz using the front-panel control knob, with additional front-panel phase and volume controls to dial in the right amount of low-frequency effect for the room. Inputs accept either speaker-level or line-level RCA connections, so the amplifier works with both modern receivers and older source equipment. Auto-sensing turns the amplifier on when a signal is detected and off when it is not, and a 12V trigger mode supports integration with automated systems. The chassis measures 8.5 by 1.75 by 9.8 inches and weighs 6.7 pounds, fitting easily into a rack or cabinet.
The Dayton Audio SPA1000 subwoofer amplifier provides nearly a kilowatt of clean, reliable audio power—just what you need to get big sound out of large, low-efficiency subwoofer speaker systems.
The Pyle 8-Channel Home Theater Amplifier is perfect for high-powered audio control. Multi-zone source control allows you to connect multiple speakers and sound systems from nearby rooms. It’s used for wide array of sound applications and connects to all of your favorite devices including TVs stereo receivers amplifiers CD/DVD players speaker systems and more. Source all of your conveniently and direct your sound with powerful distortion-free performance. Additional system features include 4-Channel Bridge-Ability Independent Channel Level Controls with Audio Configuration Protection Overload Circuitry Visual Color LED Audio Graphic Indicators -- along with Universal Rack Mount Compatibility. Enjoy multi-zone and multi-channel audio control with the Pyle 8-Channel Home Theater Amplifier System. DETAILSFeatures: Multi-Zone Audio Source Amplifier System High-Powered & Distortion-Free Audio Distribution 8-Channel Sound Processing Amp Design Integrated 4-Channel Bridgeable (Bridge) Switches Front Panel Color LED Graphic Audio Level Display Independent Channel Rotary Level Control Knobs Channel Configuration: Left/Right/Mono - Bus/AUX Input 5-Way Speaker Binding Posts (Banana Plug) Outputs Pass-Through Output for External Amplifier Linking (Daisy-Chaining) Individual Channel Safety with Protection & Overload Circuitry Master Power Button ON/OFF Universal Rack Mount Compatibility Perfect for Home Theaters & Multi-Room Audio Control Used in Home Office & Business Applications What’s in the Box: 8-Channel Amplifier Power Cable Technical Specs: MAX Power Output: 8-Ch. x 1000 Watt RMS Power Output: 100W x 8-Ch @ 8Ohm T.H.D.: Rack Mountable: 4U Rack Space Power: 115/230V Switchable (DC 12-15V) Dimension (W x D x H): 19.0 x 19.3 x 7.1 Weight: 48.5 lbs. Whats In The Box8-Channel Amplifier Power Cable
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