There are two speakers: top and bottom. Wouldn't it kill the sound from the botton speaker if I place it on the floor under a seat?

Add four 3/4 inch plywood or pine blocks under the corners of the speaker, when installing it.That added space below, does kick up the bass.

What are the exact dimensions of the unit?

Product DetailsProduct Dimensions: 13.4 x 2.4 x 9.8 inches

Kind of a dumb question, i have a suzuki swift, should i place this under the driver’s seat or the front passenger? also, only one is fine right?

Yes, only one is enought and it's very flat and should fit almost any seat, but for me has no good bass frecuency response for low frecuencies i expected more from pioneer. :(

Does this item fits under a car seat easily?

It fit under my Jeep rear seat very easily

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Pioneer TS-WH500A Hvt Sealed 8.25" 150W Active Subwoofer, 150W Max Power (50W Nominal)

Pioneer TS-WH500A Hvt Sealed 8.25" 150W Active Subwoofer, 150W Max Power (50W Nominal)

Product ID: 253838021

Details

Audio output mode
Mono
Brand
PIONEER
Connectivity technology
RCA
Frequency response
200 Hz
Speaker maximum output power
150 Watts

📏Compact 25cm depth fits any vehicle

🔊150W max power

↕️HVT tech for vertical bass movement

Description

🎶 Elevate your drive with bass that moves you—compact power, colossal impact!

SPACE SAVVY DESIGN - Slim 25cm depth fits seamlessly under seats or in trunks—perfect for compact and hybrid rides.
POWERFUL 150 W OUTPUT - Feel every beat with max 150 watts of punchy bass power.
PRECISION BASS CONTROL - 6m wired remote lets you tailor bass levels on the fly without leaving the driver’s seat.
REVOLUTIONARY HVT TECHNOLOGY - Transforms horizontal motion into deep vertical bass for unmatched clarity and depth.
UNIVERSAL VEHICLE COMPATIBILITY - Engineered to enhance sound in cars, SUVs, trucks, and hybrids—bass that travels with you.

The Pioneer TS-WH500A is a compact, 8.25-inch active subwoofer delivering up to 150 watts max power through innovative Horizontal Vertical Transforming (HVT) technology. Designed for versatile vehicle fitment, it offers deep, distortion-free bass with a built-in MOSFET amplifier and a convenient 6-meter wired remote for on-the-go bass adjustment. Its slim profile and robust MDF construction ensure premium sound quality without sacrificing space, making it the ultimate upgrade for any car audio enthusiast seeking rich, precise low frequencies.

Specifications

ASIN	B00QNSZUOY
Additional Features	Horizontal Mountable
Age Range Description	Adult
Antenna Location	Car
Audio Driver Size	8.25 Inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Mono
Audio output mode	Mono
Brand	PIONEER
Built-In Media	Speaker, Power Cable, Remote Control, User Manual
Color	Black
Compatible Devices	Car Audio System, Home Theater
Compatible with Vehicle Type	Car
Connectivity Protocol	RCA
Connectivity Technology	RCA
Connectivity technology	RCA
Control Method	Remote
Controller Type	Remote Control
Customer Package Type	Frustration-Free Packaging
Customer Reviews	4.4 out of 5 stars 191 Reviews
Enclosure Material	Aluminum
Frequency Response	200 Hz
Frequency response	200 Hz
Global Trade Identification Number	00884938274234
Impedance	4 Ohms
Is Waterproof	False
Item Dimensions D x W x H	25D x 25W x 25H millimeters
Item Type Name	Subwoofers
Item Weight	4.39 kg
MP3 player	No
Manufacturer	Pioneer
Model Name	PIONEER
Model Number	TS-WH500A
Mounting Type	Floor Standing
Mounting type	Floor Standing
Number of Audio Channels	1.0
Number of Items	1
Power Source	Corded Electric
Speaker Maximum Output Power	150 Watts
Speaker Size	8.25 Inches
Speaker Type	Subwoofer
Speaker maximum output power	150 Watts
Specific Uses For Product	Car
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	8.25 Inches
Tweeter Diameter	1 Inches
UPC	884938274234
Water Resistance Level	Not Water Resistant
Wireless Technology	No Wireless Communication Technology
Woofer Diameter	7.13 Inches

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