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MTX Audio RTP8A

360W Peak (120W RMS) Loaded Single 8" Vented Enclosure

MTX
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• 8" Amplified Loaded Subwoofer System
• 120 watts RMS (360 watts Peak)
• Built-In amplifier
• Variable bass boost
• Speaker-Level Inputs
• EBC wired remote bass level control

Learn more about the rtp8a
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List price $219.95
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$199.95

 with warranty
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Description


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Authorized dealer

8" 120W RMS Amplified Vented Subwoofer Enclosure

The MTX RTP8A is a compact, high-performance powered subwoofer system designed for those who want to add significant bass to their vehicle without sacrificing cargo space. This unit features a high-output 8" subwoofer, an integrated high-efficiency Class D amplifier, and a custom-tuned vented enclosure. Its low-profile, "square" design makes it easier to tuck into corners or small trunk spaces compared to the elongated "bass tube" models.

The RTP8A is designed for maximum efficiency, delivering 120 Watts RMS. The woofer features a lightweight and durable polypropylene cone that is engineered to move air efficiently, producing impressive bass that punches above its weight class. It is "ready to play" out of the box with both high-level and low-level inputs, ensuring compatibility with both factory and aftermarket head units. It also includes an External Bass Control (EBC) knob, giving the driver total control over the subwoofer's volume from the dashboard.

General Features:

  • Single 8" Ported Loaded Subwoofer Enclosure with Built-In Amplifier
  • Power Handling:
    • Peak: 360 watts
    • RMS: 120 watts
  • Built-in amplifier
  • Includes an EBC remote bass level controller
  • Ported Hatchback Style, Angled Back enclosure
  • Vented design increases bass output
  • Mounts near the driver seat
  • Durable aviation-grade carpet
  • Enclosure Dimensions: 13.75" TD x 13" W x 13" H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Subwoofer Features:

  • 8" subwoofer
  • Polypropylene cone
  • Road Thunder Series
  • Frequency Response: 35 - 250 Hz

Amplifier Features:

  • Class Monoblock Amplifier
  • Low-Pass Crossover Frequency: 50 - 200 Hz
  • Bass Boost: 0 - 12 dB
  • RCA Preamp Output: Mono output
  • Speaker-level (high-level) inputs
  • Fuse Rating: 10A x 1 
  • One 10 amp ATO style fuse

Enclosure Features:

  • 8" Ported Enclosure
  • Box Finish: Black Carpet

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Specifications & Details


Series
Series
Road Thunder Series
Amplifier Specifications
Number of Channels
1 - Mono
Maximum Input Gauge Size
8 AWG
Speaker Level Inputs
Yes
Preamp Outputs
Mono output
Built-in Crossover
Low-Pass (LP)
Low-Pass Crossover Frequency
50 - 200 Hz
Bass Boost
0 - 12 dB
Remote bass/level controller
Yes
Fuse Rating
10A x 1 
CEA-2031 Compliant
No
Subwoofer Specifications
Subwoofer Size
8"
Total RMS Power Handling
120 watts
Total Peak Power Handling
360 watts
Woofer Surround
Rubber
Woofer Composition
Polypropylene
Voice Coil(s)
Single
Frequency Response
35 - 250 Hz
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Ported
Number of Subwoofers
1
Box Style/Shape
Hatchback Style, Angled Back
Height
13"
Width
13"
Depth
13.75"
Number of Terminals
1
Box Exterior Color
Black
Box Finish
Carpet
Amplifier Wiring Kit
Is Amplifier Wiring Kit included?
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

MTX

Model Number:

RTP8A

Weight:

16.20lbs

Internal SKU:

rtp8a

Internal Product ID:

108741

Customer Ratings & Reviews


MTX Audio RTP8A thumbnail image

5 star
63%
4 star
38%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Photos & Videos


Customer Reviews

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Excellent sub for pickups

I bought one of those low profile under-the-seat subwoofers about a year ago to put in my extended cab Ford Ranger. It was only $150, so I kept my expectations low due to its small size. I finally got sick of below average bass....plus I couldn't take the constant clipping that would occur when I turned it up to levels that just started to sound fairly good. Last week, I purchased the MTX RTP8A for $150 from Sonic Electronix, and let me say....there is absolutely-absolutely no substitution for a properly enclosed subwoofer. If you are looking at those small/flat under the seat subwoofers, please don't buy one because you are missing out on so much more bass and they are a total waste of money! The MTX RTP8A is rated at 5 less watts RMS than the low profile one I had, but the bass output is literally double with so much low end....and I have not had one second of clipping when pushing it pretty hard. I listen to alot of different music....such as Korn, Meshuggah, Eminem, Rush, Rage Against The Machine, After The Burial, and all sorts of stuff in between. Everything that I have played sounds wicked good, and I am totally satisfied with the MTW RTP8A. Great lows, great volume, more than great bang for the buck for any pickup!

By Randy on April 1, 2017 Checkmark Icon Verified purchase

36 found this helpful


For such a small subwoofer

For such a small subwoofer I still can't get over the sound. It's as loud as any 12-inch subwoofer I've ever had. MTX is where it's at and Sonic Electronix was fast, professional, and very helpful!

By Dallas on May 31, 2020

32 found this helpful


BUY THIS SUB!!!

I ABSOLUTELY LOVE THIS SUB AND ALL IT CAN DO. I'VE HAD KICKER, DIAMOND AUDIO D3 SERIES, ALPINE, THESE ARE INSANE FOR THE VALUE.

By Cornelius on May 23, 2021 Checkmark Icon Verified purchase

30 found this helpful


Works great!

Works great. Very impressed with it. It sounds good for the price.

By Me on April 7, 2021

29 found this helpful


Little Bump

This eight gives a nice additional bass note. Deep but not overwhelming.If you are looking to "beat down the block", this is not the one. But if you want to add a deep tone to your interior sound, you got it. Perfect for me.

By Jeffrey S. on May 8, 2020 Checkmark Icon Verified purchase

28 found this helpful


By Steven on September 14, 2023 Checkmark Icon Verified purchase

27 found this helpful


By James on September 24, 2025 Checkmark Icon Verified purchase


By Richard on December 17, 2024 Checkmark Icon Verified purchase



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