The SSV Works rear-seat 10-inch subwoofer enclosure adds a second subwoofer location under the rear driver-side seat of 4-seat 2020-2027 Polaris RZR Pro R 4, Pro S 4, Pro XP 4 and Turbo R 4 models. Order it unloaded, loaded with an SSV V Series 10-inch 2-ohm sub, or as an add-on for an SSV plug-and-play kit.
Most options need an amplifier, so read What's Included before you order. If you are shopping for a RZR Pro 4 subwoofer enclosure, a RZR rear seat subwoofer or a UTV sub box made for the 4-seat cab, this SSV Works subwoofer enclosure covers the RZR Pro R 4 subwoofer, RZR Pro S 4 subwoofer, RZR Pro XP 4 subwoofer and RZR Turbo R 4 subwoofer locations in one design, and it is the rear half of a dual-sub RZR subwoofer build.
Key Features
- Molded to drop into the cavity under the rear driver-side seat of 4-seat RZR Pro models
- Fully enclosed (sealed) 10-inch enclosure with about 0.682 cubic feet of airspace, per SSV Works
- SSV Works calls it a great way to expand to a dual-sub option, making a dual subwoofer RZR Pro setup possible alongside an under-dash sub
- Three configurations: Unloaded, SSV V-Spec 2-Ohm and RZR Pro Series V-Spec/K-Spec Kit Add-On
- All mounting hardware included
- Patented design (D1092430)
Built To Solve: Thin Bass In A 4-Seat RZR Pro R, Pro S, Pro XP Or Turbo R
- One subwoofer that cannot fill a 4-seat cab with bass
- No clean place for a second 10-inch sub without giving up cab space
- Owners of an SSV RZR Pro Series V-Spec or K-Spec kit who want to add a sub without custom wiring
Best For: 4-Seat RZR Pro Owners Adding A Rear Subwoofer
- Owners with their own amplifier channel: choose Unloaded (bring your own 10-inch sub) or SSV V-Spec 2-Ohm (SSV Works has discontinued its 4-ohm V-Spec sub)
- Owners of an SSV RZR Pro Series V-Spec or K-Spec plug-and-play kit: choose the Kit Add-On
- 2026-2027 RZR Pro R 4 Ultimate owners keeping the factory Rockford Fosgate audio: see SSV's RZR Pro R 4 Ultimate factory-audio rear-seat subwoofer, sold on its own listing
- 2-seat RZR Pro owners: this box will not fit; look at the SSV Works under-dash 10-inch enclosure instead
Specifications
- Subwoofer size: 10-inch
- Enclosure: fully enclosed (sealed), approx. 0.682 cu ft airspace (per SSV Works)
- Location: under the rear driver-side seat, 4-seat models only
- SSV V Series subwoofer (V-Spec 2-Ohm option): 10-inch, 1000 watts (500W RMS), 2-ohm
- Design patent: D1092430
- Manufacturer Part Numbers: 230-RZ5-BS10U (Unloaded), 230-RZ5-BS10V2 (SSV V-Spec 2-Ohm), 240-RZ5-PHZ+BS10V (RZR Pro Series V-Spec/K-Spec Kit Add-On)
What's Included
- Every option: rear-seat 10-inch subwoofer enclosure and all mounting hardware
- Unloaded: enclosure and mounting hardware only. No subwoofer and no wiring.
- SSV V-Spec 2-Ohm: adds a pre-mounted, pre-wired SSV V Series 10-inch 2-ohm subwoofer. No amplifier and no wiring to the amp.
- RZR Pro Series V-Spec/K-Spec Kit Add-On: adds a pre-mounted, wired 10-inch subwoofer plus plug-and-play wiring to connect it to an existing SSV Works RZR Pro Series V-Spec or K-Spec plug-and-play kit.
Not included: amplifier, amplifier power/signal wiring, radio/head unit and speaker wire. The Unloaded and SSV V-Spec options are not plug-and-play: SSV Works confirms the enclosure needs an amplifier to power the subwoofer, and says the standard box does not plug and play into the factory Rockford Fosgate system on earlier models. The Kit Add-On requires an existing SSV Works RZR Pro Series V-Spec or K-Spec plug-and-play kit.
Fitment
Fits 4-seat 2020-2027 Polaris RZR Pro R 4, Pro S 4, Pro XP 4 and Turbo R 4 models, per SSV Works, mounting under the rear driver-side seat only (one per machine). It does not fit 2-seat models, and SSV Works says it does not fit the 2024 RZR XP 4 1000 Ultimate. For a RZR Pro R 4 Ultimate with factory Rockford Fosgate audio, SSV's plug-and-play factory-audio rear-seat subwoofer is sold on its own listing. Confirm your model, seat count and audio package before ordering; fitment is not guaranteed on unlisted applications.
FAQ
Do I need an amplifier for this subwoofer enclosure?
Yes for the Unloaded and SSV V-Spec 2-Ohm options; SSV Works confirms the enclosure needs an amplifier to power the sub. The Kit Add-On connects to an existing SSV V-Spec or K-Spec plug-and-play kit.
Is this a complete plug-and-play subwoofer kit?
No. Only the Kit Add-On option includes plug-and-play connections, and it needs an existing SSV Works RZR Pro Series V-Spec or K-Spec kit. The Unloaded and SSV V-Spec options are an enclosure and hardware, with or without a sub; you supply the amplifier and wiring.
Will it fit a 2-seat RZR Pro?
No. It mounts under the rear driver-side seat and fits 4-seat RZR Pro R 4, Pro S 4, Pro XP 4 and Turbo R 4 models only.
Can I run one under each rear seat?
No. SSV Works says the enclosure only fits on the driver side in the rear.
Will it plug into my factory Rockford Fosgate system?
Not this listing. SSV Works says the standard enclosure does not plug and play into the factory Rockford Fosgate system on earlier models. For a RZR Pro R 4 Ultimate with factory Rockford Fosgate audio, SSV's factory-audio rear-seat subwoofer is sold on its own listing.
Rear-seat enclosure or under-dash enclosure?
The rear-seat box is for 4-seat models and can be paired with an SSV Works under-dash 10-inch enclosure for a dual-sub setup. 2-seat owners should use the under-dash enclosure.
Why SSV Works
SSV Works has built purpose-made UTV audio since 2006, engineering weatherproof speakers, enclosures and complete systems for the dust, water and vibration of off-road riding rather than adapting car or marine gear.
Complete Your RZR Pro 4 Dual-Sub Setup
Choose the option that matches your audio: Unloaded or SSV V-Spec 2-Ohm with your own amplifier, or the Kit Add-On for an SSV V-Spec or K-Spec kit. Confirm you have a 4-seat model, then consider an under-dash 10-inch enclosure for a second sub. Order from Dunes 2 Dezert SXS.
Installation Resources
Installation Manual: RZ5-BS10 Installation Manual
