Q&A: Kicker 51PTRTP12 powered subwoofer
Answers to common questions about this Kicker powered sub
This content was created with the help of AI to summarize our data, then edited and revised by a Crutchfield writer.
The Kicker 51PTRTP12 is a powered subwoofer designed to deliver strong, accurate bass from a compact enclosure that fits easily in many vehicles. It combines a 12" subwoofer, a built-in amplifier, and a down-firing enclosure to simplify installation while protecting the sub. This makes it a popular option for drivers who want a serious bass upgrade without building a custom system.
What comes with the Kicker 51PTRTP12, and what else do I need to install it?
The 51PTRTP12 includes the enclosure with the subwoofer and amplifier already installed. You’ll still need a wiring kit (power, ground, and signal cables), plus a connection method from your stereo — either RCA cables or speaker-level wiring.
Quick take
- Powered subwoofer — sub, amp, and enclosure in one unit
- Requires an amp wiring kit (sold separately — we recommend the Kicker 46CK8 wiring kit to make sure you get everything you'll need)
- Works with factory or aftermarket stereos
Can I install the Kicker 51PTRTP12 with a factory radio?
Yes. The built-in amplifier has speaker-level inputs, which means you can connect it directly to your factory stereo without replacing the radio. This makes the 51PTRTP12 a good choice for newer vehicles where changing the factory radio isn’t practical.
Quick take
- Compatible with factory stereos
- No line output converter required
- Also supports RCA inputs for aftermarket radios
Where does the Kicker 51PTRTP12 fit in a vehicle?
This subwoofer is designed to fit in tight spaces, like hatchbacks, trucks, and SUVs. The low-profile, down-firing design helps protect the subwoofer cone while allowing you to place cargo on top of the enclosure.
Quick take
- Compact footprint for easy placement
- Down-firing design protects the sub
- Popular choice for trunk or cargo-area installs
How is the bass level adjusted once it’s installed?
The 51PTRTP12 includes a wired remote bass control, allowing you to adjust the bass level from the driver’s seat. This makes it easy to turn the bass up or down depending on the music or driving situation.
Quick take
- Includes a wired bass remote
- Adjust bass without opening the trunk
- Useful for switching between music styles
How powerful is the built-in amplifier?
The internal amplifier delivers 500 watts RMS, providing strong, controlled bass that’s well-suited for daily driving. It delivers impactful low end. It's more than enough power for a factory stereo system and plenty for a system with an aftermarket amplifier.
Quick take
- 500 watts RMS power built in
- Designed for clean, controlled bass
- Great for factory or aftermarket stereo systems
Does the down-firing design affect sound quality?
The down-firing design actually helps produce smooth, even bass by using the floor of your vehicle to reinforce low frequencies. It also protects the subwoofer from damage caused by shifting cargo or accidental impacts.
Quick take
- Even bass response
- Added cone protection
- Ideal for daily-use vehicles
Is the bass more boomy or tight and controlled?
Most listeners describe the bass as tight, punchy, and musical rather than overly boomy. The sealed enclosure is tuned to deliver strong, low-end impact while maintaining clarity and punch. It's great for for rock, pop, and any music where tight bass is preferred.
Quick take
- Tuned for accurate bass
- Strong impact without distortion
- Works well across many music genres
Can I fine-tune the sound to match my system?
Yes. The built-in amplifier includes adjustable low-pass crossover and gain controls, allowing you to blend the subwoofer smoothly with your door speakers. Proper tuning helps the bass sound like a natural extension of your system rather than an add-on.
Quick take
- Adjustable low-pass crossover
- Gain control for system matching
- Helps integrate bass cleanly
Is this a good option for someone new to car audio upgrades?
Absolutely. Because the amp and subwoofer are already matched and installed in the enclosure, the 51PTRTP12 removes a lot of guesswork. It’s a solid choice for first-time upgrades and for experienced listeners who want a clean, efficient setup.
Quick take
- Simplified all-in-one design
- Less setup guesswork
- Great for beginners and experienced users
What are our customers saying about the Kicker 51PTRTP12 powered subwoofer?
This Kicker is one of our top-selling powered subwoofers. Our customers love it, leaving reviews like, "Hits hard, good sound," and "Very happy with the sound quality and power output..." You can see all of our customer reviews here.
Quick take
- Hard hitting bass
- Great sound
- Solid product for the price
Key features at a glance
- 12" subwoofer in a compact, down-firing enclosure
- Built-in 500-watt RMS amplifier
- Speaker-level and RCA inputs for flexible integration
- Wired remote bass control included
- Durable enclosure designed for everyday use
Ready to add some bass?
If you’re wondering whether the Kicker 51PTRTP12 is the right fit for your vehicle or you need help choosing wiring and accessories, our Crutchfield Advisors are happy to help by phone or chat.
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