Musical Fidelity MC4 Bass/Mid Driver

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anthony.taylor1967

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Joined 2009
#1
Hi all.

In need of some help here.

I've recently inherited my late brother's old Hi-fi, which needs attention, but one step at a time.

First the problem is with the speakers. I've been trying to find info on Musical Fidelity MC4 Drive unit specs.

These were made in 1987 (Stamp inside the enclosure). He then had a Musical Fidelity A100 which didn't have any output protection and subsequently blew one channel and took one of the bass drivers along with it. He had it repaired but it was different from the other speaker. Not much different, but one of them used a black diaphragm/spider and the other is yellow.
I'm not too sure which was damaged as this was a long time ago. I'm presuming the newer one is the Black one.

Anyway, he hadn't been using his setup for some years, and with the smokey environment, the nicotine had attacked the rubber surround, and the cone on one of the drivers, and had started to crumble.

I cannot find any info on these. I have tried reaching out to Martin Collums of Hi-fi Critic, but nobody responded.
I have tried Musical Fidelity, someone did contact me, but they were at a loss, as Musical Fidelity had been taken over by someone else since then.
I've tried Wilmslow Audio, but they would only repair the surround and couldn't provide me with any details as to what these drivers were and what I could use as an alternative.

Does anyone have any info on the drivers or as to what I could use?
I'll be wanting to replace the Tweeters at some point too and upgrade the crossover components.

Google hasn't been much help at all.

I would like to get these big babies to sing again.

Many thanks and all the best!

Tony
 

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#5
Hi guys. Sorry it's late.

Thank you so much for the Info.

I was searching everywhere and the one for the dalia speakers looks interesting.

Obviously, I can't and don't want to spend too much.

That one on ebay looks like the black rubber is tarnished.

Funny, inputting the Audax number MTX2025TSN 8 Ohm throws nothing up except for Audax cycling LOL

I did find this. https://www.ebay.co.uk/itm/18599329...5Ry5y1kdGymo72kdlV_cZsbMmt1eIfMMaAioFEALw_wcB.
But it's the postage cost. way out of pocket. They've put a few specs up, so I'm wondering what I could use instead?


I am toying with the idea of using different drive units for the bass and treble and probably replace the crossover. Any ideas?

Cheers

Tony

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#6
It might be worth checking the dimensions of the SB acoustics or scan speak discovery series and see how well they fit the existing cutout. Then see how they behave in a 32 litre box.

I am guessing the safe bet will be the scan speak as it has a better overall response and could be crossed at around 2Khz to a new tweeter.
 
#7
A point worth noting is that the driver you linked to has the alternative pincushion shaped frame. Which may mean it is not an easy drop in replacement.
I believe your drivers are the later circular variation. I don't think there was any change in the acoustic or electrical measurement
 
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#9
raymondj said:
It might be worth checking the dimensions of the SB acoustics or scan speak discovery series and see how well they fit the existing cutout. Then see how they behave in a 32 litre box.

I am guessing the safe bet will be the scan speak as it has a better overall response and could be crossed at around 2Khz to a new tweeter.
Click to expand...
Ah so the MC4 is a 32Ltr Box? I really want to make these great again. even if I have to change the drive units, tweeters, and crossover. The only thing I didn't like about these speakers was that they sounded a little cold. Though that could have been the Audio Innovations S500 or his turntable setup, The Source & Audio Technica AT-F5. Hard to know, it was such a long time ago when I last heard his setup. My big grand idea is to get his turntable, amplifier, and speaker working again. There's a lot that's wrong and one that I can only do in dribs and drabs.

Any more advice would be appreciated.

Cheers....Tony
 
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