SHIPPING TO USA TEMPORARILY SUSPENDED
SHIPPING TO USA TEMPORARILY SUSPENDED
DRIVE UNITS BY MANUFACTURER:
Morel CAT 378 Tweeter
Categories: 0.75 - 2" (19-50mm) Dome Tweeters Morel Tweeters
The Morel CAT 378 is the modern updated replacement for the legendary MDT-37. This high efficiency horn loaded tweeter features a field replaceable hand coated 28mm Acuflex textile dome, a large ferrofluid cooled Hexatech aluminium voice coil, a vented ferrite magnet system and a tuned / damped rear chamber. This tweeter is ideal for low powered valve amps and has a detailed, unfatiguing sound with a gently downward sloping response - excellent for taming 'live' rooms with hard surfaces. Recommended frequency use: 2000-20,000 Hz. High power rating of 200w nominal, 1000w peak.
A full datasheet can be downloaded from the bottom of this page.
Resonant frequency (fs) | 700 Hz | Nominal impedance (Zn) | 8 Ω |
Effective diaphragm diameter | 28mm | DC resistance (Re) | 5.2 Ω |
Ferrofluid ? Y/N | Yes | RMS power handling | 200W |
Recommended crossover | 2khz | Faceplate diameter | 94mm |
Sensitivity (2.83V/1m) | 93 dB | Cutout hole diameter | 72 mm |
CAT378
Not a review of the drive units received as such, because the project is still awaiting other parts from elsewhere, but the tweeters arrived rapidly and in good condition, as usual from Willys.
However, FWIW, based on previous experience with Morel tweeters, and having heard the design I'll be including these in, I would also recommend Morel tweeters. Not necessarily the very highest resolution, but still good clarity, and very easy on the ears. Good power handling too, and easy to replace the diaphrams if the worst happens.
Thanks for the review John !
Will & Caroline
Excellent customer service and good prices.
Thanks for the review Simon !
Will & Caroline
Friendly technical support
40+ years in the trade
UK family run business
Excellent customer service
Quick dispatch
Been looking for a supplier of replacement drivers for some years.
Willy's HiFi had just the parts at a good price and they arrived in a couple of days.
Excellent service. Even a personal thank you hand written on the invoice.
A quick delivery and the tweeters are perfect on my mission 753 freedom speakers. Easy to fit . Highly recommend.
I’m no expert when it comes to speakers, but after some research (and a strong recommendation from ChatGPT), I went with the SB Acoustics SB65WBAC25-4 as a reference full-range speaker in this size range.
Having now tested them, I can confidently say they’re probably the best speakers I’ve ever owned. The clarity is outstanding—every detail comes through with incredible precision. The bass is surprisingly full and punchy for a speaker this size, and they handle power impressively well. For anyone looking for a high-performance compact full-range driver, these are hard to beat.
Item as described and arrived quickly - and did the job. However, I suggested that anyone replacing speaker foam makes sure they have a very large pair of sharp dressmaking scissors as it was not easy cutting to size without producing a ragged edge (which I managed to hide short of a close inspection)!