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TIW 360 X 8 OHM

Art. No. -
30 cm (12") High-End woofer with a particularly low resonance frequency. Double cellulose cone, large-scale magnet arrangement and a heavy die-cast aluminium basket. Excellent power-handling capabilities with minimum mechanical power loss due to the 60 mm voice coil mounted on a capton coil carrier, the pressure vented pole piece and the rear-vented damper. Particularly suitable for closed cabinets and transmission line applications.
Technical Data
Sketch
Amplitude & Impedance Frequency
Directivity pattern
Rated power 300 Watt
Maximum power 600 Watt
Nominal impedance Z 8 Ohm
Frequency response fu - 4000 Hz
(fu: Lower cut-off frequency depending on cabinet) .
Mean sound pressure level 86 dB (1W/1m)
Excursion limit 24 mm
Resonance frequency fs 21 Hz
Magnetic induction 1.06 Tesla
Magnetic flux 2000 µ Weber
Height of front pole-plate 10 mm
Voice coil diameter 6 cm
Height of winding 2.5 cm
Cutout diameter 27.9 cm
Net weight 6 kg
D.C. resistance Rdc 5.8 Ohm
Mechanical Q factor Qms 3.68
Electrical Q factor Qes 0.37
Total Q factor Qts 0.34
Equivalent volume Vas 140 l
Effective piston area Sd 450 cm2
Dynamically moved mass Mms 116 g
Force factor Bxl 15.89 T · m
Inductance of the voice coil L 2.6 mH

Used in / Accessories:

SUB T-36.39

The TIW 360 X 8 OHM is well suited as a subwoofer in home theatre systems or as part of a hi-fi application, due to its heavy-duty diaphragm and low resonance frequency. In this sample arrangement, it is used in an enclosed chamber with a net capacity of 39 litres.

The passive arrangement will produce powerful, low-range bass, such as would normally only be possible with other drivers in far larger cabinets. If you add an 820 µF-capacitor before the TIW 360 X 8 OHM, the output level below 50 Hz will be raised and above this level it will be lowered. This lowers the lower limiting frequency to a remarkable 28 Hz. As a matter of interest, at 1 watt it is virtually impossible to measure a difference between the normal, coarse (very cheap) electrolytic capacitorsand the smooth, high-grade ones. Film capacitors are definitely not required. At higher output levels, however the coarse electrolytic capacitors could heat up. Which electrolytic capacitors you use is really not so much a matter of sound quality, but rather one of operating safety. The precise specifications are less important. It would be possible, for example, to install another 1x 470 µF and 1x 330 µF or 8x100 µF (in parallel) instead of a 1x 820 µF.

Things really hot up, however, if you decide to use amplified speakers with an active crossover. We used the Thommessen Proteus SW 2.5, which provides a large number of setting options. The signal level is equalized below the installation resonance frequency in such a way that you get a good bandpass curve (bass EQ +6 dB at 23 Hz, low pass 50 Hz). The lower limiting frequency will then be at a breathtaking 20 Hz. Of course, since every room has its own acoustic properties, you should select the option that provides the best actual listening pleasure.

Variants: 1) passive
2) passive with an 820 µF capacitor
3) active with a Proteus SW 2.5 (without capacitor)

KM 140

Ring-shaped magnets for the compensation of the stray magnetic field (magnetic shielding). The ring has to be glued on the rear pole-plate (e. g. with Pattex), reducing the stray magnetic field to a minimun, allowing speakers positionings of 20 cm apart from TV or computer screens.Suitable for: AL 200 8 OHM; AL 200 DV 2x8 OHM; GF 200 2 X 4 OHM; GF 250 2 X 4 OHM; TIW 360 8 OHM; TIW 360 DS 2 X 4 OHM; TIW 360 X 8 OHM; TIW 400 8 OHM; TIW 400 DS 2 X 4 OHM; W 250 S 4 OHM; W 250 S 8 OHM; W 300 S 4 OHM; W 300 S 8 OHM; WSP 21 S 8 OHM; WSP 26 S 8 OHM

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