I have 1 too many subs. this one will fit in a box less than a cube..0.35 actually or bigger.

that means no loss of space.

I got it new 2 weeks ago. have listened to it maybe 2 hrs. only reason I pulled it is because I had to change the configuration on my amp. I really need a dual 4ohm and this is a dual 2 ohm sub.

$85

Pioneer TS-W2502D2
Champion Series Pro 10" sub with dual 2-ohm voice coils
Highlights:

10" subwoofer with dual 2-ohm voice coils
IMPP cones reinforced with interlaced basalt and carbon fibers
3-layer urethane and fiber-woven radial surrounds
Air Suspension Control System eliminates traditional spider structure
die-cast aluminum basket
power range: 100-800 watts RMS (400 watts RMS per coil)
peak power handling: 3,000 watts
frequency response: 20-150 Hz
sensitivity: 89 dB
top-mount depth: 6-11/16"
sealed box volume: 0.35-0.7 cubic feet
ported box volume: 0.6-1.0 cubic feet

Champion Series PRO: Powerful by Design

Introducing the series that changed the way Pioneer makes subwoofers: The Pioneer Champion PRO Series. The patented technologies behind the PRO series of subwoofers bridge the gap between quality bass and an affordable price. They feature an air suspension system that creates a spring-like effect and a compressed air chamber within the subwoofer. The result is powerful, deep bass. They are developed to utilize the air space surrounding the subwoofer so that they can be installed in smaller boxes, yet still retain that solid low bass. For the Champion PRO series of subwoofer, Pioneer uses high-grade materials that will last a long time. The wide-roll 3-layer fiber radial surround improves the power handling of the sub, while reduces the distortion. At the bottom of the chassis sits two double-stacked magnets to provide excellent power and response. The Pioneer Champion PRO series delivers incredible booming bass that is loud, powerful, and accurate.
Subwoofer Features:

10" Dual 2 ohm Champion PRO Series Subwoofer
Power Handling:
Peak: 3000 watts
RMS: 800 watts
Impedance: Dual 2 ohms
Interlaced basalt/carbon fiber reinforced IMPP cone
Wide-roll, 3-layer fiber woven radial with honeycomb cloth surround
Copper voice coil wire
Phenol resin coated glass cloth voice coil bobbin
Dual 4-layer, long voice coil
Double stacked (85oz) magnet
Frequency response: 20-150 Hz
Sensitivity: 89 dB
Aluminum die-cast rigid chassis basket design
1-Piece rubber gasket
Integrated single-sided silver compression terminals wire terminals
Mounting Depth: 6-5/8"