Kicker 48TRTP122 Sub 12 Inch Down Firing Subwoofer Loaded Enclosure 500w RMS
Couldn't Load Pickup availability
The Kicker 48TRTP122 is a 12" down-firing loaded subwoofer enclosure rated at 500W RMS (1000W peak) at 2 ohms, pairing a CompRT active driver with a passive reFLEX radiator in a low-profile braced MDF box. It is part of Kicker's TRTP range.
Key specifications
- Subwoofer: 12" (30 cm) CompRT with passive reFLEX radiator
- Enclosure: Down-firing loaded enclosure, braced MDF
- RMS power: 500W
- Peak power: 1000W
- Impedance: 2 ohm (single terminal)
- Sensitivity: 98 dB 1W/1m
- Installed height: 15.6 cm (6 1/8")
- Box size: 37.0 cm wide x 70.0 cm long
Kicker TRTP CompRT 12" down-firing loaded enclosure, 2 ohm (48TRTP122)
The TRTP down-firing loaded enclosure fits under a pickup seat or in the boot, delivering strong bass without sacrificing cargo space. It comes loaded with a passive reFLEX subwoofer and a CompRT active sub for extremely low bass extension.
The enclosures for the reFLEX and CompRT sub are pre-wired to a single 2 ohm terminal. The box is built to take the weight of stacked cargo, with extensive internal bracing and thick MDF construction throughout.
The CompRT features red double stitching bonding an improved Santoprene surround to a polypropylene woofer cone. SoloKon technology joins the cone to the vented back brace, forming a single integrated unit that cools the motor and reduces distortion. Kicker's Forced-Air Cooling keeps the drivers running approximately 20 percent cooler.
The 48TRTP122 works best with 500W of recommended amplifier power. If you prefer an all-in-one solution, the Kicker 51PTRTP12 adds a built-in 500W amplifier to the same down-firing 12" format. For more output, Kicker also offer the 49L7TDF122 L7T 12" down-firing enclosure rated at 600W.
Explore the full range in Kicker Loaded Subwoofer Enclosures.
Specification
| Impedance | - 2 Ohm |
|---|---|
| Sensitivity | - 98dB 1W/1m |
More specs
| |
What's Included
- Kicker CompRT 12 Inch 2 ohm
Kicker
About the Kicker 48TRTP122
From our tech experts at CEN
The Kicker 48TRTP122 is a 12 inch down-firing loaded subwoofer enclosure rated at 500W RMS (1000W peak) at 2 ohms. It pairs a CompRT active driver with a passive reFLEX radiator inside a braced MDF box just 15.6 cm tall. Both drivers are pre-wired to a single 2 ohm terminal, ready for an external amplifier.
Who it suits
This suits drivers who want strong bass without losing boot or cab space — the low-profile down-firing design sits under a pickup seat or in the boot. Those needing more output could step up to the Kicker 49L7TDF122 L7T 12 inch 600W down-firing enclosure.
Our tech experts advise
The 48TRTP122 requires a separate amplifier delivering around 500W RMS into 2 ohms; the Kicker KEY500.1 is a well-matched option. Measure your space before ordering: the box is 37.0 cm wide and 70.0 cm long. Installation pricing varies by vehicle — see our Nottingham car audio fitting page for details.
Explore the full Kicker range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Kicker
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
More from Kicker Loaded Subwoofer Enclosures
More options from the same range, in stock and ready to go
Kicker 49L7TDF102 Sub 10 Inch L7T Subwoofer Down Firing Loaded Enclosure 500w
£349.95
View product
Kicker Hideaway 51HS10 Sub 10" Compact Powered Active Underseat Subwoofer 180w
£399.95
Kicker 45VL7R102 Sub 10 Inch L7R Ported Loaded Subwoofer Enclosure 500w RMS
£369.95
Kicker 46CWTB84 8″ 4 Ohm Weatherproof Subwoofer Enclosure
£319.95
Kicker 45VL7R122 Sub 12 Inch L7R Ported Loaded Subwoofer Enclosure 600w RMS
£399.95
Frequently Asked Questions
Q: Do I need an amplifier for this subwoofer?
A: Yes, unless it is an active (powered) subwoofer with a built-in amplifier. Passive subwoofers need an external amplifier matched to the RMS power and impedance shown in the Specification tab.
Q: What size enclosure does this subwoofer need?
A: The recommended enclosure volume is listed in the Specification tab where the manufacturer provides it. As a rule, sealed enclosures give tighter, more accurate bass while ported enclosures deliver more output. Contact CEN if you would like a recommendation for your build.
Q: What does RMS power mean?
A: RMS is the continuous power a subwoofer can handle, and it is the number that matters when matching an amplifier. Peak or max figures describe short bursts only. Match your amplifier output to the RMS rating in the Specification tab.
Q: Sealed or ported enclosure - which should I choose?
A: Sealed boxes are compact and produce tight, controlled bass suited to sound quality builds. Ported boxes are larger and produce more output at low frequencies, suited to those who want maximum impact. Either works well when built to the recommended volume.
Q: Can CEN build or supply an enclosure and fit everything?
A: Yes. CEN supplies enclosures and offers professional installation from our Nottingham premises, including amplifier wiring. Contact us to discuss your build.
Q: How much amplifier power does the Kicker 48TRTP122 need?
A: It is rated at 500W RMS and 1000W peak, and works best with 500 watts of recommended power into its single 2 ohm terminal.
Q: Will the Kicker 48TRTP122 fit under a seat?
A: It is designed to fit under a pickup seat or in the boot, with an installed height of 15.6 cm and a box size of 37.0 cm wide by 70.0 cm long. Check these against your space before ordering.
Q: What type of enclosure is the 48TRTP122?
A: A down-firing loaded enclosure with a 12 inch CompRT driver and a passive reFLEX radiator, built from thick, internally braced MDF.
Not Sure Where to Start?
Straightforward advice and the latest news from our Nottingham team.
All Guides and News →
Car Audio
Pioneer Perfect Fit 9-Inch Stereos: Fitting Kits and Every Car They Fit (2026)
Read the guide →
Car Audio
BMW Speaker Upgrades Explained: Where to Start and What Fits
Read the guide →
Car Audio
Christmas Gift Guide 2026: Car Audio, Dash Cams and Outdoor Tech
Read the guide →
Car Audio
Upgrading Car Audio Without Replacing the Factory Stereo
Read the guide →
Car Audio
Amplifier Wiring Kits Explained: Gauge, Fuses and Earths
Read the guide →
Car Audio
New at CEN: Option Audio Drive-10Flat — Golf Mk8 Bass, Zero Boot Space Lost
Read more →