Kicker 48TRTP82 Sub 8 Inch Down Firing Subwoofer Loaded Enclosure 300w RMS
Couldn't Load Pickup availability
The Kicker 48TRTP82 is a down-firing loaded enclosure from Kicker's TRTP range, housing an 8" CompRT active subwoofer and a reFLEX passive radiator, rated at 300W RMS into a single 2 ohm terminal. Its slim, tough MDF box fits under a truck seat or in a boot and is built to take cargo stacked on top.
This listing is the 8". The TRTP down-firing enclosure range is also available in the Kicker 48TRTP122 12" version at 500W RMS.
Key specifications
- Subwoofer: 8" (20 cm) CompRT active sub plus reFLEX passive radiator
- Design: down-firing, thin profile
- Impedance: single 2 ohm terminal
- Recommended power: 300W RMS
- Peak power: 600W
- Sensitivity: 85.5 dB 1W/1m
- Dimensions: 60 cm W x 31 cm D x 13.8 cm H
Bass In Any Space
Kicker's TRTP Down-Firing Loaded Enclosures fit neatly under a truck seat or in the boot, delivering deep bass without sacrificing cargo space. Each unit comes pre-loaded with a reFLEX passive radiator and a CompRT active sub, pre-wired to a single 2 ohm terminal, and is built to handle cargo stacked directly on top.
Construction uses thick MDF with extensive internal bracing. The CompRT features signature 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 system keeps the sub running up to 20% cooler under load.
The 48TRTP82 works best with 300W of recommended power.
Explore the full range in Kicker Loaded Subwoofer Enclosures.
Specification
| TYPE | thin-profile |
|---|---|
| WOOFER SIZE (in, cm) | 8, 20 |
| IMPEDANCE | (Ohms) 2 |
| SENSITIVITY | (dB 1w/1m) 85.5 |
| BOX TOP DEPTH (in, cm) | 12-1/4, 31 |
| BOX BOTTOM DEPTH (in, cm) | 12-1/4, 31 |
| BOX HEIGHT (in, cm) | 5-3/8, 13.8 |
| BOX WIDTH (in, cm) | 23-5/8, 60 |
More specs
| |
What's Included
- Kicker CompRT 8 Inch 2 ohm
Kicker
About the Kicker 48TRTP82
From our tech experts at CEN
The Kicker 48TRTP82 is a slim, down-firing loaded enclosure housing an 8" CompRT active subwoofer and a reFLEX passive radiator, rated at 300W RMS into a single 2 ohm terminal. It measures 60cm wide, 31cm deep and 13.8cm tall, fitting under a truck seat or flat in a boot. Thick MDF with internal bracing means cargo can be stacked directly on top.
Who it suits
This suits drivers wanting genuine bass in a truck cab or car boot without losing usable space. The enclosure is pre-wired to 2 ohms, pairing well with a mono amplifier such as the Kicker KEY500.1. For greater output, the Kicker 49L7TDF82 steps up to 350W RMS.
Our tech experts advise
The 48TRTP82 needs a separate mono amplifier at 2 ohms; the head unit output alone is not sufficient. Confirm your amplifier is stable at 2 ohms before connecting. Place it on a flat, clean surface with the driver facing down. Installation is priced per vehicle — contact us for a quote.
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
Staff PickKicker 53PL7TDF12 12 Inch Sub Powered Down Firing Subwoofer Enclosure 600w RMS
£549.00
View product
Kicker 48TRTP102 Sub 10 Inch Down Firing Subwoofer Loaded Enclosure 400w RMS
£319.95
Kicker 46TL7T82 Sub 8 Inch L7T Subwoofer Thin Profile Loaded Enclosure 350w RMS
£279.95
Kicker 50DCWC102 Dual 10 Inch CompC Ported Loaded Subwoofer Enclosure 500w 2ohm
£339.95
Kicker 48TCWRT672 Sub 6.75 Inch Thin Profile Sub Loaded Enclosure 150w RMS
£189.95
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 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: 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: Is the subwoofer included with the Kicker 48TRTP82?
A: Yes. It comes loaded with an 8 inch CompRT active subwoofer and a passive reFLEX radiator, pre-wired to a single 2 ohm terminal.
Q: What amplifier does the 48TRTP82 need?
A: Use a mono amplifier that is stable at 2 ohms. Kicker recommends 300W RMS for this enclosure.
Q: How tall is the 48TRTP82?
A: It is 13.8 cm high, 60 cm wide and 31 cm deep.
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 →