Which is better for a small hatchback or truck?

The RVB8.1A is superior for small vehicles due to its compact dimensions and angled back that fits flush against rear seats.

Does the RV12.2B provide more bass than the RVB8.1A?

Yes, the RV12.2B has four times the peak power and much larger cone surface area, resulting in significantly louder and deeper bass.

Are these kits ready to install out of the box?

Both include wiring kits and bass remotes, but the RVB8.1A is easier to install because the amplifier is already mounted inside the box.

Can I connect these to a factory radio?

The RVB8.1A is better suited for factory radios because it includes high-level speaker inputs, whereas the RV12.2B relies on RCA connections.

Rockville RVB8.1A Powered Subwoofer vs Rockville RV12.2B Dual 12" Sub Enclosure Kit

The Rockville RVB8.1A is the better choice for space-conscious drivers looking for a simple, all-in-one bass upgrade. The RV12.2B is a massive dual-subwoofer system designed for maximum volume and deep low-end impact in larger trunks. While the RVB8.1A offers an integrated amplifier for easy setup, the RV12.2B provides double the RMS power and significantly higher sensitivity for serious audio enthusiasts.

Choose the RVB8.1A if you need a compact, all-in-one powered subwoofer that fits in tight spaces without sacrificing cargo room.
Choose the RV12.2B if you want maximum bass output and have the trunk space for a dual 12-inch enclosure and separate mono amplifier.

Prices

Rockville RVB8.1A Powered Subwoofer: $99.95 at Rockville (last seen Nov 9)
Rockville RV12.2B Dual 12" Sub Enclosure Kit: $49.99 at Arcalis Développement (last seen Nov 9)
Difference: the Rockville RV12.2B Dual 12" Sub Enclosure Kit is $49.96 cheaper than the Rockville RVB8.1A Powered Subwoofer at the latest prices (Nov 9)

	Rockville RVB8.1A Powered Subwoofer	Rockville RV12.2B Dual 12" Sub Enclosure Kit
Subwoofer Size	Single 8-inch driver	Dual 12-inch drivers
Amplifier Design	Built-in (Integrated)	External Mono-block
Power Handling	200W RMS / 300W Peak	400W RMS / 1200W Peak
Sensitivity	91 dB	101 dB
Enclosure Size	Compact (13 x 13 x 12.5 inches)	Large (31.5 x 20 x 20.7 inches)
Voice Coil	Single Voice Coil	Dual Voice Coil

Spec	Rockville RVB8.1A Powered Subwoofer	Rockville RV12.2B Dual 12" Sub Enclosure Kit
Waterproof	No	No
RMS Output	200 W RMS	400 W
Maximum Output	300 W Peak	1200 W
Channels	2-channel (Wiring Installation Kit)	Mono-block
Amplification Type	Class AB	Mono-Block Class A/B
Dual Voice Coil	Single Voice Coil	Yes
Speaker Type	Subwoofer	Subwoofer
Impedance	Single 4-Ohm	4 Ohms
Sensitivity	91 dB	101dB @ 1w/1m
Connectivity Type	Wired	Wired
Ports &Amp; Interfaces	Low Level RCA Inputs, High Level Speaker Inputs	RCA
Control Method	Remote	Dash-mounted bass remote

Spec	Rockville RVB8.1A Powered Subwoofer	Rockville RV12.2B Dual 12" Sub Enclosure Kit
Vehicle Type	Car, Truck	Car
Compatible Devices	Car Audio System	Stereo, Car Audio System, Head Unit
Weight	0.28 g (parcel dimensions)	24.04 kg
Depth	13	80.01 cm
Height	13	50.8 cm
Width	12.5	52.71 cm
Mounting Type	Tabletop	Car Mount
Hardware Included	Wire Kit	Complete wiring kit, 8 AWG wiring kit
Enclosure Type	Bass Reflex Port	Vented, Angled

Rockville RVB8.1A Powered Subwoofer vs Rockville RV12.2B Dual 12" Sub Enclosure Kit

Prices

Rockville RVB8.1A Powered Subwoofer vs Rockville RV12.2B Dual 12" Sub Enclosure Kit

Prices

Rockville RV12.2B Dual 12" Sub Enclosure Kit

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