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Castle Harlech speaker crackle

Hi, Just picked some old castle harlech speakers, haven't worked out if they are S1 or S2 yet. The guy I picked them up off of said that there is a crackle in one of the speakers. I have had a look, taken the driver out and cannot spot anything obvious. Does anybody have any ideas what could be causing the crackling.

Many thanks



Castle Harlech speaker crackle

The voice coil may be rubbing; might be dirt in there or an expanded voice coil (from over-driving). Surround may be bad causing the voice coil to be off-center. Speaker frame could be bent.
Flexible wire from the terminal to the voice coil may be partially open; try wiggling these wires gently. Could be a cross-over network component problem or loose/bad connection.

Castle Harlech speaker crackle

Thanks Johnnysan,
I will work through these later and tell you if they solved the issue

Castle Harlech speaker crackle

It's easy to tell them apart as the original Harlech had polypropylene bass units with metal dome tweeters, while the S2 had carbon fibre bass units and a soft dome tweeter.

Sadly, replacement drive units are no longer available from Castle as they used to make everything in house, and when they went bust IAG only bought the name. Current Castle loudspeakers are made to a different design in China. NOS drivers occasionally come up on eBay and the units in the Isis are identical. While it does sound like a coil issue, the usual cause of failure with these is hardening and cracking of the plastic cone itself, especially the top ones which get greater UV exposure.

Castle Harlech speaker crackle

I have checked the cone, which looks fine. The cables look fine, so i'm guessing it's the coil. The guy I picked it up off of had contacted wembley loudspeaker who said they can fix it for £100, which isnt bad considering they are nice speakers and cost me nothing

Castle Harlech speaker crackle

That's good news on the cones (which are more difficult to fix than the coils). £100 is a bargain to repair them; I still have a pair of the original Harlechs from 1998 and they are great all rounders.