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All systems go !
DRIVE UNITS BY MANUFACTURER:
UW 958 Woofer
Categories: 8-10 inch Bass Speakers Morel Subwoofers

The Morel UW 958 is a dedicated 9" bass speaker of considerable power from the Ultimate Subwoofer range. This rugged drive unit features the Morel Uniflow™ Aluminium diecast chassis, a high flux double Ferrite magnet and a huge 5.1" / 130mm voice coil assembly wound with Hexatech Aluminium wire. The Accucenter™ self centering pulp fibre cone/cap is a one piece assembly offering high rigidity and excellent internal damping.
This drive unit features PFS™ Progression Field Symmetry: under extreme conditions, the spider and surround are engineered to act as progressive shock absorbers, preventing voice coil displacement and bottoming out - this improves voice coil linearity and maximum excursion.
The pole piece is vented (very large) for minimal compression under heavy drive conditions and power handling is very impressive at 500W nominal, 1500W short term peak. A full datasheet can be downloaded from the bottom of this page.
| Resonant frequency (fs) | 28 Hz | Nominal impedance (Zn) | 8 Ω |
| Mechanical Q factor (Qms) | 1.61 | DC resistance (Re) | 6.2 Ω |
| Electrical Q factor (Qes) | 0.45 | RMS power handling | 500W |
| Total Q factor (Qts) | 0.35 | Sensitivity (2.83V/1m) | 85.8 dB |
| Equivalent volume (Vas) | 39.5 L | Chassis diameter | 222 mm |
UW958
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Product as described, easy to cut & fit.
On reflection having now fitted the foam, I wish it was 15mm to 18mm or even 20mm thick. This is not a complaint. For a small speaker under 30cm high it’s perfect. For a larger speaker I feel a thicker sponge would hold its structure more pleasingly, its aesthetics, but important for the finished look.
I’ve been building my own home cinema as a complete DIY project and reached the stage where I needed some decent acoustic foam for my speaker panels (also DIY!) so I picked up 3 large sheets from here. They were sent quickly, packed well and moreover, are of excellent quality. With them being folded into the shipping box they were slightly creased but after leaving them out overnight on a flat surface, the creases fell out completely. They’re now in place and doing their job brilliantly. Cheers Willys Hifi!
The crossover was constructed well, I just need to figure out the best way to attach it to my Kef Concertos as they are bigger than the ones supplied by Kef that are mounted on the front of the baffle board.
Very nice deep bass look amazing with my custom made speaker
Great speedy delivery and very easy to fit. The plastic in my drivers had perished and they had suffered one too many parties! No need to make any adjustments (someone above did suggest that). I just screwed them in and the foam compressed into place. Before and after below (before I changed speaker number 2). Thank you!
