All systems go !
All systems go !
DRIVE UNITS BY MANUFACTURER:
UW 1258 Woofer
Categories: 10-15 inch Bass Speakers Morel Subwoofers
The Morel UW 1258 is a dedicated 12" very high power, long throw bass speaker 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 high at 800W nominal, 3000W short term peak. A full datasheet can be downloaded from the bottom of this page.
Resonant frequency (fs) | 21 Hz | Nominal impedance (Zn) | 8 Ω |
Mechanical Q factor (Qms) | 1.88 | DC resistance (Re) | 6.8 Ω |
Electrical Q factor (Qes) | 0.56 | RMS power handling | 800W |
Total Q factor (Qts) | 0.43 | Sensitivity (2.83V/1m) | 87 dB |
Equivalent volume (Vas) | 138.38 L | Chassis diameter | 305 mm |
Friendly technical support
40+ years in the trade
UK family run business
Excellent customer service
Quick dispatch
As always, items arrived nicely packed and promptly.
I purchased these as substitutes for another driver that was used in a transmission line design. The old drivers had way too high a Q and sounded a bit boomy.
I chose these mainly because the diameter was exactly the same as the original drivers, meaning no cabinet reworking :)
They behaved very well in the transmission line cabinet and don't exhibit any peaks or nulls in the response. Very easy to work with and the 2nd order crossover couldn't be much simpler, crossed at around 2.4K which was mainly determined by the DT105 tweeter I was using, the drivers blend really well together.
Overall these are a very good sounding driver with a natural and neutral sound.
For those interested, I have included pictures of the speaker, crossover and measurements.
Tip: Run these drivers in before measuring and designing the crossover!
Good service well packed
I've needed something like this for years, fantastic product and a lovely company to deal with. Won't be my last purchase from them
It was a nice experience to send the old filters to the UK (from the Netherlands) and get them surprisingly fast back (taking the overseas shipment into account). At first I did it wrong since I also replaced the drivers that could also be connected in a 4/6 Ohm (double coil). But after correcting and calibrating my receiver the speakers sounded great.
Thanks!
Used in a DIY LS3/5a project, with Morel CAT 298 tweeters and custom crossovers using ClarityCap CSAs. Super pleased with these woofers! I think they synergize well with the “live” thin-wall LS3/5a cabinets. The sound is neither bloated, nor thin, just revealing, spacious, and with very lifelike tone. I’m so happy with the results of this project and had a great buying experience with Willy’s. Thank you!!