I have 2 Bag End Infrasub 18 subs I need to sell. Each is in good shape and the grills are like new. I bought both of these used and never used the grills. The main appeal to me has been that these subs seem to work with almost any speakers. Switching them in and out of the system, even when running full range main speakers, is a revelation. These provide a huge base for the rest of the music to float on. Look at the data and you'll see these are heavy, at abt 90+ lbs each. The local UPS store can pack one of these and ship it in the US for abt $200. These retailed for $1395 each - I am asking only $450 each because of my location in an audio backwater - stores only sell car stereo here.



Here is the user guide:
http://www.bagend.com/technical/user-guides/Some technical data: Specifications:
Enclosure:
3/4" MDF
Low Frequency Transducer: EL-18T 18" Cone
Amplifier Output Power: 500 Watts continuous sine wave
INFRA Module:
8 Hz dual integrator
System Type: 3 cu. ft. Sealed box
Driver Nominal Impedance: 4 Ohms
Input Connectors:
Left, Center, and Right
channel line level RCA jacks
Left and Right speaker level spring
terminals
Hi-Pass Outputs: Left, Center and Right
channel line level RCA jacks
Hi-Pass Filters: 12dB per octave, -6dB at 95 Hz
Frequency
Response: +/- 3dB 8 Hz to 95 Hz (2 pi Steradians)
Overload Protection: Preset threshold Concealment(tm) circuitry
AC Power : 115 or 230 internal switches
Finish: Black textured paint
Grille: Black nylon cloth on frame
Dimensions:
23.5"h x 21.5"w x 18.5"d
59.7 cm x 54 cm x 46.3 cm
Weight: 91 lbs. (41.05 kg)
Shipping Dimensions:
30" x 27" x 23.5"
74.3 cm x 67.3 cm x 59.1 cm
Shipping Weight: 103 lbs. (46.72 kg)