by Crutchfield's Eric A.

A subwoofer built for outdoor fun

The OSD Forza-10 adds deep, musical bass to an outdoor sound system. Its 10" polypropylene woofer is contained in a good-looking enclosure with an antique bronze finish — it blends right in on the deck or by the swimming pool. A built-in eyebolt lets you tether it securely, so you can leave it outside and not worry that it will "get up and walk away."

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The OSD Forza-10 subwoofer's antique bronze enclosure blends right in with your outdoor furniture.

A subwoofer built for outdoor fun

Use a matching amp

The Forza-10 passive subwoofer does not have any kind of built-in crossover or amplification. It requires a dedicated subwoofer amplifier like the OSD SMP300 to power it.

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Product highlights:

Featured in our article: Best outdoor speakers for 2024
10" polypropylene cone woofer in weatherproof enclosure
frequency response: 50-300 Hz
power handling: up to 300 watts
nominal impedance: 4 ohms
sensitivity: 86 dB
attractive antique bronze finish
IP66 weatherproof rating
built-in anti-theft eyebolt
14" speaker cable included
passive design makes an ideal match for OSD's SMP300 subwoofer amplifier

Dimensions and warranty:

16-11/16" diameter x 11-15/16" height
weight: 29 lbs.
warranty: 1 year
MFR # FORZA-10

What's in the box:

OSD Forza-10 Outdoor Subwoofer owner's manual

10" Outdoor subwoofer w/ attached 14" jacketed input wires (14-gauge)
Two 3-1/2" nails
2 Crimp caps
Installation guide

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Researched by Crutchfield's Stacey B.

Features & specs


Type	Subwoofer
Bluetooth	No
Enclosure	Acoustic suspension
Tweeter Type	N/A
Tweeter Size (inches)	N/A
Midrange Size (inches)	N/A
Woofer Size (inches)	10
Woofer Composition	Polypropylene
Woofer Surround	Rubber
Power Range (watts)	Up to 300
Sensitivity	86 dB
Impedance (ohms)	4
Frequency Response	50-300Hz Hz
Connector Type	Bare-ended wire
Height (inches)	11-15/16
Width (inches)	16-11/16
Depth (inches)	---
Weight (pounds)	29
Wall-mountable	No
Bracket Included	N/A
Parts Warranty	1 Year
Labor Warranty	1 Year

Product Research

Features

Overview: The OSD Forza-10 is an above-ground subwoofer designed for home landscape applications. The down-firing outdoor subwoofer can provide omnidirectional sound dispersion while easily blending in with your backyard, patio, garden, porch, or pool area.

Construction: The Forza-10 landscape subwoofer features a 10" polypropylene cone woofer mounted in a down-firing configuration inside a sealed impact-resistant, molded plastic enclosure. This combination provides deep bass in a wide dispersion area. The Forza-10 carries an IP66 weatherproof rating making it impervious to rain, snow, sprinklers, and high temperatures.

Power & Wiring: The Forza-10 subwoofer features a 14" section of 14-gauge speaker wire that exits through a sealed opening on the bottom of the subwoofer. The wire features a heavy-duty rubber jacket for added protection. The 4Ω subwoofer can handle up to 300W RMS (500W peak).

Landscape Mounting: The Forza-10 subwoofer is constructed with weatherproof components making it ideal for open outdoor spaces. It can be surface-mounted on a lawn or garden area, but for optimum performance, the outdoor subwoofer should be placed on a hard surface such as a patio, porch, or paved area. Two key-hole slots on the bottom of the enclosure can be used with the included nails to hold the subwoofer in place on a hard surface. An attached eye-bolt on the underside of the enclosure lets you anchor it in place for added security.

Note: The OSD Forza-10 subwoofer is weatherproof, but is not designed to be fully submerged in water.

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6 questions already asked

Can this run off a Sonos amp?

shane May 29, 2023

1 answer

Since the OSD Forza-10 has no built-in crossover the Sonos amp will not work to power it, Shane. You will need a subwoofer specific amp that has a crossover like the OSD SMP300 amp in the handy link below. The SMP300 would deliver 150-watts to a single Forza-10 sub and would generate 250-watts at 4-ohms if you connected a pair of Forza-10's. https://www.crutchfield.com/p_452SMP300/OSD-SMP300.html

bo May 30, 2023 (Staff)

I have a Marantz 1200 receiver running 4 outdoor Klipsch KHO-7 speakers. Would this subwoofer be a good fit for this system?

timothy Apr 30, 2023

1 answer

Greetings Timothy, and thank you for your question. I see no reason why not. It will need another amplifier connected to the Marantz's subwoofer output though. The Marantz will not power the subwoofer.

hogan Apr 30, 2023 (Staff)

Can this be painted?

scott Feb 22, 2023

1 answer

It was not intended to be painted, but painting it should not affect sound quality.

zachary Feb 23, 2023 (Staff)

I have 2 definitive tech aw6500 speakers outside and an audio source amp210vs running them. Can I add the osd forza 10 subwoofer also to it?

judd Feb 10, 2023

1 answer

Since the OSD Forza-10 passive subwoofer does not have any kind of built-in crossover or amplification Judd, it requires a dedicated subwoofer amplifier to power it. You have an RCA output on your AudioSource AMP210VS, so you can easily add the OSD SMP-500DSP mono subwoofer amplifier in the link below. This amplifier is a little too powerful for the OSD sub by around 100-watts RMS but can still be used when setup properly. If you are looking for some more bass, this is the way to go! https://www.crutchfield.com/p_452SMP500/OSD-SMP-500DSP.html

bo Feb 11, 2023 (Staff)

I have 2 outdoors definitive tech as 6500 speakers and an audio source amp210vs running them. Can I add the OSD Forza 10 subwoofer to this amp also?

judd Feb 10, 2023

1 answer

Greetings Judd, and thank you for your question. The OSD Forza-10 needs a mono amp that is 4 ohm stable. You cannot run the Amp210vs in a bridged mode and run your Definitive Technology AW6500s at the same time off just the one amp. There is a main out on the Amp210vs that would need to be ran to an additional amp to run the subwoofer. OSDs SMP300 mono amp would be the right amp for this sub.

hogan Feb 10, 2023 (Staff)

Can this be run in 70volt ?

kert Jul 24, 2022

1 answer

This subwoofer is not intended for use in 70V.

zachary Jul 24, 2022 (Staff)

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