All systems go !
All systems go !
DRIVE UNITS BY MANUFACTURER:
Morel MDM 55 Midrange
The Morel MDM 55 is a hybrid 54mm (2") soft dome midrange drive unit from the Classic series. This hand assembled unit has a low resonance of just 380 Hz and a wide linear bandwidth, the response between 2-5 kHz is flat ± 2dB or better. This unit has a very compact square faceplate allowing close spacing of drivers.
Features include an Acuflex hand coated soft textile dome, 54mm Hexatech aluminium voice coil, a vented hybrid mixed magnet assembly and a critically tuned and damped aluminium rear chamber.
Power handling is excellent at 200w nominal, 1000w peak. As usual with Morel products, design and build quality are top notch.
A full datasheet can be downloaded from the bottom of this page.
Resonant frequency (fs) | 380Hz | Nominal impedance (Zn) | 8 Ω |
Effective diaphragm diameter | 54mm | DC resistance (Re) | 6.2 Ω |
Ferrofluid ? Y/N | Yes | RMS power handling | 200W |
Recommended crossover | 1.2 kHz / 18dB | Faceplate (square) | 87 mm |
Sensitivity (2.83V/1m) | 89.5dB | Cutout hole diameter | 76 mm |
MDM55
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!!