MTX Audio RT8PT 8" 240W Peak Amplified Vented Car Subwoofer Tube Enclosure
- 8 inch powered subwoofer in a vented tube enclosure
- 120 watts RMS from the built-in class D amplifier, 240 watts peak
- High and low level inputs, RCA connection
- 12 volt wired power
- 24.13 inch wide, 13 deep, 11.25 high, 20.8 lb
- 2 year manufacturer warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact amplified bass tube that adds low end without a separate amp or a built box. Output is modest, and the listing gives no impedance figure.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B005FXFS8GModel: RT8PT-FBACategory: Enclosed Subwoofer Systems
Overview
Adding bass to a stock radio, the RT8PT puts a subwoofer, a class D amplifier and a vented tube enclosure into one carpeted unit. The high and low level inputs let it connect to nearly any type of radio, and an external bass control mounts near the driver.
Everything needed for a bass upgrade comes in one low profile enclosure, so it suits vehicles where cargo space matters. The listing positions it for new enthusiasts and for fans who have outgrown a trunk full of large subwoofers, which also tells you the output is moderate.
Who it's for
A small trunk or cargo area where a full ported box will not fit, fed from a factory or aftermarket radio. Drivers who want a custom enclosure or a measured impedance rating should look elsewhere, since the listing states neither.
Pros and cons
- Amplifier built into the enclosure
- High and low level inputs
- External bass control for adjusting on the go
- Low profile carpeted tube
- Moderate output for large bass systems
- Impedance not listed
- Floor standing only
Performance notes
Output depends on the integrated class D amplifier driving a polypropylene cone woofer inside a vented enclosure, where the vent reinforces the low frequencies. Level can be trimmed with the external bass control mounted near the driver, so no trip back to the amplifier is needed.
Specifications
| Brand | MTX |
|---|---|
| Model | RT8PT-FBA |
| Dimensions & fit | |
| Speaker size | 8 inches |
| Dimensions (D x W x H) | 13 x 24.13 x 11.25 inches |
| Item weight | 20.8 pounds |
| Capacity & performance | |
| Maximum power | 240 watts |
| Power & efficiency | |
| Amplifier RMS power | 120 watts RMS |
| Input voltage | 12 volts |
| Construction & materials | |
| Enclosure | Aviation grade carpet over metal and plastic |
| Compatibility & installation | |
| Vehicle type | Select cars, trucks and SUVs |
| Mounting | Floor standing |
| Inputs | RCA, high level input, low level input |
| Warranty & support | |
| Warranty | 2-year manufacturer warranty |
| Other details | |
| Speaker type | Subwoofer |
| Driver type | Dynamic driver |
| Audio channels | 2 |
| Frequency response | 50 hertz |
| Waterproof | No |
Frequently asked questions
Will the MTX RT8PT work with a factory radio?
The listing describes high and low level inputs for easy connection to any type of radio. The connection types listed are RCA, high level input and low level input.
Does the MTX RT8PT need a separate amplifier?
No. The listing describes an integrated class D amplifier rated at 120 watts RMS, so the subwoofer is powered from inside the enclosure.
Can the bass level be changed while driving?
The listing says an external bass control connects to the amplifier and mounts near the driver for adjustment on the go.
Is the MTX RT8PT waterproof?
No. The listing marks it as not waterproof, so it belongs somewhere dry in the vehicle.