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StereoStone Commercial Sub Amplifier

CODE: 71460619

List price: £319.12  

Price: £265.93

You save: £53.19 (17%)

Designed to power 1 StereoStone Sub Rock or 2 StereoStone Gibralter Subs, or any passive subwoofer with a maximum 250 watt input.

Auto Sense Mode
The amplifier’s Auto Sense mode allows it to turn on or off in response to audio signals from the receiver or preamp, which are received via its input connections.

Connecting the Subwoofer to the Amplifier
CAUTION: Perform connections only when the amplifier is turned off.

NOTE: It is essential that a minimum of 14-gauge speaker wire be used. There is one output on the amplifier labeled Subwoofer Output: a positive and a negative three-way binding-post on the back of the amplifier that facilitate connection in a variety of ways, including stripped wire, spade connectors, etc.

Connecting the Audio Inputs
CAUTION: Only make connections when the amplifier is turned off.

• Line-Level Inputs (Left/Right): The line outputs from a preamplifier or receiver can be connected to the line-level inputs of the M3 amplifier using RCA cables. If the system has just one subwoofer output, simply plug it into either the left or right line inputs. Using these inputs will cross over the audio signals sent to the line outputs at a fixed high pass of 75Hz.

• LFE (Low-Frequency Effects) Input: If the preamplifier or receiver has an LFE output, you can connect it that way. However, the LFE input effectively bypasses the amplifier’s low-frequency adjustable (low-pass) crossover. The Low-Pass crossover function will be handled by the preamplifier or receiver.

• Speaker-Level Inputs (Left/Right): These inputs can be used if the preamplifier or receiver does not have a subwoofer output or set of line output jacks. Connect the left/right pair of main-speaker output wires from the main amplifier or receiver to the speaker-level input connectors on the M3 amplifier. Then connect a left/right pair of speaker wires from the M3 speaker output connectors to the main speakers.

Connecting the Audio Outputs
• Line-Level Outputs (Left/Right): Sources connected to the line-level inputs can be forwarded to other receivers or amplifiers line-level inputs. This allows a second component to make use of the signal as it’s passed on. Connect RCA cables to the line-level output sections of the M3 and the line-level inputs of a receiver or amplifier. Note: The M3’s high-pass crossover will be in effect, removing the audio below 75Hz to the connected component.

• Speaker-Level Outputs (Left/Right): Connect a left/right pair of speaker wires from the M3 speaker output connectors to your main speakers. This method will filter out the frequencies below 75Hz and send them to the subwoofer. The frequencies above 75Hz will be sent to the main speakers. The system’s primary amplifier or receiver will still power the main speakers.

Connecting the AC Power
Plug the three-prong plug directly into a 120V AC 60Hz wall outlet.


- Primary Power Switchable 115 / 230 Volt 50/60 hz.
- Rated Power Output: 180 watts
- Crossovers: Variable low-pass crossover 35hz to 150hz, fixed high-pass crossover at 75hz
- THD @ 10 Watts: 0.1%
- Input Sensitivity: 8.6mv
- Input Impedance: 33 kOhms
- Auto-off Time: 15 minutes
- Auto-on Sensitivity: 2.5mv
- S/N Ratio: > 70db
- Dimensions:H 4" x W 17 1/8" x D 12 5/8"
- Weight: 18 lbs.
- Limited 1 year warranty.

Free ground shipping within the Continental U.S. by UPS Ground. 

Music In A Rock

StereoStone Inc. manufacturers high quality, outdoor rock and planter speakers. Used in DisneyWorld, Universal Studios, zoos, fine restaurants, hotels and theme parks around the world, these rocks look just like the real thing, and produce the sound quality you would expect from a high-end speaker. Just because you hear it, doesn't mean you have to see it. That's why our SoundStealth Series is virtually indistinguishable from a real rock! From our planter speakers to our top of the line Da Vinci Cinema Rock, you'll find what you need to fill your outdoor environment with beautiful sounds.

Listen to StereoStone Rock Speakers at Universal Studios - DisneyWorld - Harry Potter Exhibit - Major Theme Parks - Fine Hotels and Restaurants around the world.

Don't be fooled by other inferior products on the market today. Most of them are made in China. We're proud to say our products are Made In The USA to the highest standards. Standards so high we back them with a lifetime warranty. You won't be replacing these speakers every season. Don't be left without your outdoor music this summer. Power your outdoors with StereoStone rock speakers. Visit our Helpdesk if you have any questions, or call us: 541.249.7217 8am to 5pm Pacific Time.

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