Morel CAT 378 1-1/8" Soft Dome Horn Tweeter

Brand:| Model: CAT 378
Morel's CAT378 features a hand treated 1-1/8" soft dome, horn loaded for higher efficiency and high dynamic range without power compression.
  • 94 mm horn-loading faceplate
  • Large Hexatech™ aluminum voice coil
  • Replaceable Acuflex™ dome/coil assembly
  • High sensitivity
  • High power handling
  • Sturdy gold plated input tags
Part # 
Weight: 1.45 lbs.  
List Price$87.99
Regular Price$67.80
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Part # 277-084
Qty:  EA
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Product Details

Morel CAT 378 1-1/8" Soft Dome Horn Tweeter

Morel's CAT378 features a hand treated 1-1/8" soft dome, horn loaded for higher efficiency and high dynamic range without power compression. The magnet assembly is vented into a damped rear chamber to lower resonance and to eliminate "honking" at lower frequencies. Latest evolution of the popular MDT-37 tweeter.

Product Specifications
  • Tweeter TypeSoft Dome
  • Cone / Dome Diameter1-1/8"
  • Impedance8 ohms
  • Power Handling (RMS)200 Watts
  • Frequency Response1,800 to 20,000 Hz
  • Sensitivity93 dB 1W/1m
Thiele-Small Parameters
  • Resonant Frequency (Fs)700 Hz
  • DC Resistance (Re)5.20 ohms
Mounting Information
  • Overall Outside Diameter3.70"
  • Cutout Diameter2.83"
  • Depth2.32"
Morel CAT 378 1-1/8" Soft Dome Horn Tweeter
  • BrandMorel
  • ModelCAT 378
  • Part Number277-084
  • UPC844632070761
  • Product CategoryTweeters
  • Unit of MeasureEA
  • Product Rating
    (11 Reviews)
  • Weight1.45 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Morel CAT 378 1-1/8" Soft Dome Horn Tweeter
Morel CAT 378 1-1/8" Soft Dome Horn Tweeter is rated 4.8182 out of 5 by 11.
Rated 5 out of 5 by from It's A Hard Tweeter To BeatThis tweeter is always my first pick for new builds it can be crossed over low in 2-way system if needed as I do in a WTW @1600Hz 24db LR roll off and it works great and still sounds good evevn at high power levels I got it on a Crown XLS 1000 DriveCore amp and I push it all the time as it is a part of a work speaker and I don't give no mercy. This tweeter makes for a great high out tweeter for poeple that like it loud but still like it to sound good and for me there is no other way yes I have some nice big P.A speakers but the highs still don't sound as smooth as this tweeter but this tweeter don't go as loud. I use this tweeter in a high powered house-party 3-way speaker as well. I cross it over @2500Hz 12db LR along with the other drivers it sounds much better then pulling out the P.A speakers I still use the P.A subs. I have a hard time not going with this tweeter the high sensitivity, power handing and good looks make it hard to beat for the money I highly recommend it.
Date published: 2011-01-15
Rated 5 out of 5 by from MorelOutstanding product ,,I've used these tweeters on most of my projects and when I used other tweets ,I wound up going back to this tweeter ,in the right cabinet set up and cross over it is amazing what you'll hear ..
Date published: 2010-10-05
Rated 4 out of 5 by from Great tweeter used rightIn two projects I've used first the CAT408 and second the CAT378, and overall I like the CAT408 by a small amount. If you need to have the tweeter timed later than a small woofer (my needs), the CAT378 really fits the bill. I highly recommend this driver for almost any project.
Date published: 2010-08-06
Rated 5 out of 5 by from Louder than the older MDT-37!I through a pair of these newer CAT-378's in some cabinets that previously had the older MDT-37's. I measured these to be a little bit smoother in their response. I also found these to be 1 db louder than the MDT-37's. I now need to add 1 db Pads for designs I made using the older MDT-37 drivers. According to Morel the CAT-378's have a higher grade magnet. I am wondering if this is making them a little louder / efficient. I did not know this when I wrote a previous review.
Date published: 2010-03-30
Rated 5 out of 5 by from Good & Wide Sound - Great for Time Alignment!I bought this and mated it to the B&C PS100 with a 24 db / octave LR crossover at 1,320 Hz. Part of the reason for the LR crossover and choosing this driver was to ensure both drivers are in phase with each other at all frequencies. This driver is a shallow horn loaded design. (By surface mounting my B&C PS100 and mounting the face of the CAT378 flush with the cabinet surface, it results in approximately 1mm difference between the two drivers domes for near perfect alignment.) This makes time and phase alignment with this driver by using a LR crossovers in 2-way designs really quite easy. The only RTA measurements I've taken to date in my living room at about 40" away have been very encouraging. In this location with my speaker system design it is +/- 2.5 db from 1.81 - 18.25 kHz in 1/24th octave resolution using TrueRTA software. (I had expected it to be overall strongest in the 3.5 kHz range but found it to actually be in the 8 - 10 kHz for both of my drivers in both speaker locations. Overall it was a more neutral sounding response than I expected based on seeing Morels graphs on their website. A Plus!) I find this driver to sound bigger than it is. In listening I don't think it sounds like the sound is originating from a 1" wide source. Maybe that is because of the shallow horn design. This bigger sound helps make stereo imaging very smooth, very big and wide. (Regardless of the reason it is a definite plus in my book.)Available replacement Domes are a definite plus should you ever accidentally hit play with a powerful amp left in the max position from repair and take out your tweet's. (Speaking from experience, it only takes two snare hits.) They are easy to change on this model and cost much less than completely new drivers.I highly recommend my B&C PS100 / Morel CAT378 / 1.32 kHz. 24 db/octave LR crossover setup. Nice Driver Morel. I'll be using it in my next speaker design as well. Thanks!
Date published: 2010-01-10

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Morel CAT 378 1-1/8" Soft Dome Horn Tweeter

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