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Product description

Optimal Speaker Design is engaged in the design, engineering, and distribution of high-quality home and commercial audio products. Our products range in complexity from simple in-ceiling speakers to whole house audio systems – all with beautiful styling and high-end sound quality. Our U.S.-based research, development, and design team is supported by a network of cutting-edge acoustical, mechanical, and electrical engineers. Together, we create products that combine the latest technology with ease of use for a quality sound experience.

High Current Power

The amplifiers are 4 ohm stable which doubles the current demand output and can power two 8 ohm subwoofers wired in parallel.

Phase Control

The phase control operates over a range of 0 to 180 degrees and compensates for a delay between the subwoofer and the main speakers.

Crossover Control

The advanced crossover circuit can be set at different frequency ranges (35Hz to 160Hz) and can be adjusted with the front-panel control knob.

Class D Digital Technology

Highly efficient Class D technology runs cool under demanding loads and doesn’t take up a lot of space.

Features:

Choice of speaker level or RCA Auto sensing Distributed power capability Front panel phase and volume control

OSD Audio 500 Watt Subwoofer Amplifier

Mono-Channel Class D, Digital, Audio Sensing, and 4 -8Ω ETL – SMP300

The SMP300 is a Class D digital mono subwoofer that delivers up to 500W of peak power to beef up the bass in your home theater or audio sound system. Designed for use with passive subwoofers such as in-wall subs that require external power, the SMP300 provides continuous, stable power but measures only 3” high so it can fit inside any equipment rack or cabinet.

Ideal for powering used in whole-house audio or home theaters Highly efficient Class D technology runs cool under demanding loads Adjustable low-pass filer for distortion-free bass

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Price

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$321.54$321.54 $490.49$490.49 $653.99$653.99

Amplifier Class
Class A/B Digital Class D Digital Class D Digital Class D Digital Class D

Number of Channels
1 1 1 1 1

Power Handling per Channel @ 8 Ohms
40W(RMS)/ 80W(MAX) 80W(RMS)/ 160W(MAX) 60W(RMS)/ 120W(MAX) 150W(RMS)/ 300W(MAX) 200W(RMS)/ 500W(MAX)

Power Handling per Channel @ 4 Ohms
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100W(RMS)/ 200W(MAX) 100W(RMS)/ 200W(MAX) 250W(RMS)/ 500W(MAX) 400W(RMS)/ 800W(MAX)

Frequency Response
50Hz-150 kHz +/-3dB 20Hz-160Hz +/-1 dB 20Hz-160Hz +/-1 dB 20Hz-160Hz +/-1 dB 20Hz-250Hz

Impedance
8 Ohms 8 Ohm and 4 Ohm Stable 8 Ohm and 4 Ohm Stable 8 Ohm and 4 Ohm Stable 8 Ohm and 4 Ohm Stable

Variable Crossover
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35Hz-160Hz 35Hz-160Hz 35Hz-160Hz 40Hz-160Hz

Auto-On Sensing
No Yes Yes Yes Yes

Dimensions (L x H x D)
8.5″ x 2.6″ x 6″ 5.7″ x 2″ x 6.1″ 8.5″ x 1.75″ x 9.8″ 16.25″ x 3″ x 9.25″ 17.13″ x 2.16″ x 11″

Weight
5 lbs 2 lbs 5 lbs 5 lbs 8.4 lbs

BRING ON THE BASS: A highly efficiency Class D subwoofer amplifier that serves up big bass with up to 500W max power
WORKS WITH ALL RECEIVERS: Compatible with older and newer source equipment and includes LFE, line-level and speaker-level inputs for greater flexibility
ADJUSTABLE CONTROLS: Includes adjustable phase and low pass filter to dial in just the right amount of low frequency sound effects
EFFICIENT CLASS D TECHNOLOGY: A highly efficient Class D sub amp that is ideal for budget-minded users who want a feature-rich digital sub amp that does not run hot or take up a lot of space
COMPACT DESIGN: Measures only 3” inches high, 9 ¼” deep and 16 ¼” wide to fit just about anywhere