Is an amp needed with this or is there one preinstalled?

You will need an amp. I have an Autotek 1500 class D. A bet overpowered but gains and crossover set right. Sounds pretty good, yet struggles at super low notes. I plan on upgrading the sub later. Good build, solid.

Is that a port I see in the image?

Exactly what I saw.. ported in picture but sealed in listing. They need to get it together

What do you mean by fast bass?

It doesn’t have to wait to warm up the voice coil

Is a kenwood xr601-1 excelon 600-watt monoblock rated at 400 watts rms at 4 ohms single to much amp for this subwoofer?

Nope...I have that much power and still believe it can handle more

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Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure

Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure

Product ID: 112115025

Details

Brand
Alpine
Speaker Maximum Output Power
1000 Watts
Frequency Response
28 Hz
Connectivity Technology
Bluetooth
Audio Output Mode
Stereo

📏12-inch Sealed Subwoofer

🔊1500W Max Power

🛠️Includes Installation Brackets

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Description

🎶 Feel the bass, own the road!

EFFORTLESS SETUP - Comes with installation brackets and belts for a hassle-free, secure fit.
DURABLE PROTECTION - Heavy-duty subwoofer grill guards your investment while adding sleek style.
POWER THAT MOVES YOU - Unleash thunderous bass with 1500W max output, perfect for immersive sound experiences.
PRECISION BASS CONTROL - 12-inch sealed design ensures deep, tight bass that elevates every track.
VERSATILE COMPATIBILITY - Optimized for car audio systems, transforming your ride into a mobile concert hall.

The Alpine SWT-12S4 is a powerful 12-inch sealed subwoofer tube enclosure delivering up to 1500W max power (300W RMS). Designed for car audio enthusiasts, it features a durable build with included installation hardware and a protective grill, ensuring deep, precise bass and easy integration into your vehicle’s sound system.

Specifications

ASIN	B07MXND918
Additional Features	Bass Boost
Age Range Description	Adult
Antenna Location	For Surround Sound Systems
Audio Driver Size	12 Inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Best Sellers Rank	#329,284 in Electronics ( See Top 100 in Electronics ) #839 in Car Subwoofer Boxes & Enclosures #1,788 in Car Component Subwoofers
Bluetooth Range	10 Meters
Brand	Alpine
Compatible Devices	Car audio systems
Compatible with Vehicle Type	Car
Connectivity Protocol	Bluetooth
Connectivity Technology	Bluetooth
Control Method	Touch
Controller Type	Voice control
Customer Package Type	Standard Box
Customer Reviews	4.4 out of 5 stars 284 Reviews
Enclosure Material	Plastic Metal
Frequency Response	28 Hz
Impedance	4 Ohms
Is Waterproof	FALSE
Item Dimensions D x W x H	12.75"D x 26"W x 12.75"H
Item Height	10 inches
Item Weight	25 Grams
MP3 player	No
Manufacturer	Alpine
Model Name	SWT-12S4
Model Number	SWT-12S4
Mounting Type	Floor Standing, Tabletop Mount
Number Of Circuits	1
Number of Audio Channels	1.0
Number of Items	1
Power Source	Corded Electric
Processor Count	1
Speaker Maximum Output Power	1000 Watts
Speaker Size	12 Inches
Speaker Type	Subwoofer
Specific Uses For Product	Car Audio
Subwoofer Connectivity Technology	Wireless
Subwoofer Diameter	12 Inches
Tweeter Diameter	12 Inches
UPC	793276242525
Unit Count	1.00 Count
Warranty Type	Limited
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth
Woofer Diameter	12 Inches

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