Side-by-Side comparison between different SUBWOOFER
Copyright (c) 2003 HOMETHEATER 2U. COM., E Direct International, LLC. All rights reserved.
SUBWOOFERS
R-7 Subwoofer
MODEL
ROSE-7
Subwoofer
NATURE-7
Subwoofer
NATURE-9
Subwoofer
POLAR LIGHT-7 Subwoofer
PRICE
$349
$419
$699
N/A
DESIGN
Specially engineered bass reflex system (2 tuned port at back) , with a built-in amplifier.
Specially engineered bass reflex system(2 tuned port at bottom), with a built-in amplifier.

Passive radiator is located at bottom of the box, in place of a port to produce a more uniform sound wave.

Specially engineered bass reflex system(2 tuned port at bottom), with a built-in amplifier.

Passive radiator is located at bottom of the box, in place of a port to produce a more uniform sound wave.

Specially engineered Band-Pass system, with a built-in amplifier.

Woofer is fully encased within the cabinet which has a tuned port at bottom & back.

DRIVER
Woofer (1):
10"
aluminum cone with butyl rubber surround, stamped steel basket.
Woofer(1):
8"
doped wool non-press paper cone with butyl rubber surround, aluminum basket.

Passive Radiator(1): 10"doped wool semi-press paper cone with butyl rubber surround, aluminum basket, tune the box to a low frequency of 30 Hz.

Woofer(1):
10"
doped wool non-press paper cone with butyl rubber surround, aluminum basket.

Passive Radiator(1):12" doped wool non-press paper cone with butyl rubber surround, aluminum basket, tune the box to a low frequency of 18 Hz.

Woofer (1) :
6-1/2" , patented single molded doped wool non-press paper cone with butyl rubber surround, aluminum basket.
DRIVER VOICE COIL
2"( 4 layers )
2"( 4 layers )
2-1/2"( 4 layers )
2-1/2" (copper clad aluminum ribbon wire)
DRIVER MAGNET
30 oz
Ferrite
30 oz
Ferrite
40 oz
Ferrite
3.6 oz
neodymium magnet
DIMENSION (HxWxD)
17-3/4" x 12-5/8" x 15-3/4"
17-3/4" x 12-5/8" x 15-3/4"
19-5/8" x 17-3/4" x 19-5/8"
19-5/8"x 8-1/4" x 14-1/4"
WEIGHT (lb)
40
40
80
38.5
MATERIAL
18mm MDF.
18mm MDF.
25mm MDF.
15mm MDF.
FINISH
Real-wood Rosewood veneer ( dark red finish ), or real-wood Maple veneer ( light nature finish ).  
Real-wood Cherry veneer ( dark red finish ), or real-wood Walnut veneer ( light nature finish ).
Real-wood Cherry veneer ( dark red finish ), or real-wood Walnut veneer ( light nature finish ).
Piano mirror-finish. (champagne silver powder & lavish dark red )
GRILLE
Removable wood frame with acoustically transparent cloth.

Black cloth. (rosewood series)
Shinning silver cloth. (maple series)

Removable wood frame with acoustically transparent cloth.

Black cloth.
(cherry series)

Dark silver cloth.
(walnut series)

Removable wood frame with acoustically transparent cloth.

Black cloth.
(cherry series)
Dark silver cloth.
(walnut series)

N/A
CONNECTION
Gold plated RCA terminals & 5-way binding posts
Gold plated RCA terminals & spring clip terminals.
Gold plated 5-way binding posts & RCA terminals, special 5.1 channel "sub in" ( gold plated RCA terminal).
Gold plated RCA terminals & spring clip terminals.
BUILT-IN AMPLIFIER
150 Watts/ 4 ohms output, continuously adjustable in sound Level & frequency, switchable in phase (0, 180 degrees).
150 Watts/ 4 ohms output, continuously adjustable in sound Level & frequency, switchable in phase (0, 180 degrees).
200 Watts/ 4 ohms output, continuously adjustable in sound level, phase and frequency. Switchable in low pass frequency (40, 80 Hz).
100 Watts/ 4 ohms output, continuously adjustable in sound Level , phase & frequency.
POWER SUPPLY
A/C 115, Auto-Detect On/Off switch.
A/C 115, Auto-Detect On/Off switch.
A/C 115, Auto-Detect On/Off switch.
A/C 115, Auto-Detect On/Off switch.
IMPEDANCE
4 ohms nominal.
4 ohms nominal.
4 ohms nominal.
4 ohms nominal.
CROSSOVER FREQUENCY
Continuously variable from 40-140 Hz.
Continuously variable from 40-140 Hz.
Continuously variable from 40-180 Hz.
Continuously variable from 40-140 Hz.
CROSSOVER to DRIVER
( internal wiring)
OFC speaker wire.
Phoenix high graded 13 mm 6N OFC speaker wire.
Phoenix high graded 13 mm 6N OFC speaker wire.
Phoenix high graded 13 mm 6N OFC speaker wire.
FREQUENCY RESPONSE
(+/- 3dB)
32-200Hz
28-200Hz
18-160Hz
22—150 Hz.