Castle Harlech S2 front top (mid) driver x2 needed!

[dillinger]

Hi all!

Does anyone know of a suitable driver for Harlech S2s, being the mid driver? front fascia above the tweeter?

Any help or advice would be greatly appreciated.

[EarlK]

Some backgrounding info for a possible fix!

[dillinger]

Ah thanks! Actually I've inherited some in great working order, except the drivers for both were replaced by inferior drivers. Looking to restore to former glory!

[EarlK]

Originally Posted by dillinger

Ah thanks! Actually I've inherited some in great working order, except the drivers for both were replaced by inferior drivers. Looking to restore to former glory!

For the sake of clarity;

How many drivers do you need per enclosure?

[dillinger]

Just one each. Top upward firing ones are fine, tweeters are fine! Just missing the front bass/mid drivers for each speaker.

[EarlK]

Ahh, thanks for that.

Internet info says that the top firing and front facing bass/mid drivers are one & the same driver.

If that's correct, then ( if mine ) I'd measure one of these existing drivers to get its' TS Parameters.

With those parameters in hand one could look for the closest match.

Maybe Castle would give out the TS parameters ( or suggest a replacement ) if you contacted them and explained your situation ( considering that apparently the drivers were made in-house and are no longer available > or < so says the internet ).

[dillinger]

I've been told in an email from Blue Aran Limited, that Wilmslow Audio officially recommend Monacor’s SPH-135C. Only about £52 sterling each, so will give them a whirl probably!

[dillinger]

So I've had the other drivers out. The top mounted drivers (06-55) are practically mint, as are the tweeters (08-19)! Why the other two 06-55s were removed from these I have no idea. I have sourced the last (06-55) available from the awesome gent who I believe used to work for Castle as still has some spares, but I think it's looking unlikely that I'll be able to find another 06-55 anywhere, unless someone somewhere on this forum has an utterly destroyed pair of Harlechs that they don't mind parting ways with a driver....

[EarlK]

Good Info,

FWIW, ( if you only have two of the original 06-55 to work with ) I'd put them facing your ears ( on the vertical face ) and the replacements, up on the horizontal ( top ).

Those Monacor's certainly look like a decent substitute.

[system7]

Good advice from EarlK there IMO.

People agonise over replacement drivers. Truth is they are all much the same. Seen one 5", you've pretty much seen them all.

Will it fit without too much woodwork? Looks like it might.

Monacor SPH-135C Size 133x133mm

Seems the Monacor SPH-135C is a reflex driver at Qts 0.39, so should work in a quarter wave line or reflex.

Using the Castle originals front facing seems like a plan. The top firing ones should not be too critical. Can't say if this is a two way TMM in effect, or a 2.5. You'd need to dissect the crossover to know that, and also to know what level adjustments are appropriate or possible.