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Replacement 1" Screw on Compression drivers

Printed From: Speakerplans.com
Category: General
Forum Name: General Forum
Forum Description: Open Discussion / Questions
URL: https://forum.speakerplans.com/forum_posts.asp?TID=106109
Printed Date: 05 August 2021 at 6:28pm
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com


Topic: Replacement 1" Screw on Compression drivers
Posted By: Ajsski99
Subject: Replacement 1" Screw on Compression drivers
Date Posted: 24 February 2021 at 8:16pm
Hi all, posting this on behalf of a friend.

My buddy has just got hold of some Phonic 15" PA speakers he plans on using as booth monitors, (the SE715's I believe), unfortunately though both of the compression drivers are broken.

For replacements, I've been looking at the Fane CD130's, but cannot seem to find them in stock anywhere.

What other drivers would you guys recommend as replacements? Must be 1" screw on otherwise I suspect they wont fit within the box, and the horn is threaded so must be screw on.

Also, will it be a drop in replacement? Or will I have to change the crossovers inside the boxes.

Cheers, Ajsski99



Replies:
Posted By: GAZ.
Date Posted: 24 February 2021 at 11:15pm
You can buy adapters to convert 1” bolt on compressions to screw on. I think blue Aran sell them. This is ideal as you have a much greater choice of compression to choose from.
I have several pairs of cabs running fane CD 150 coupled to screw on horns.


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100% Earth Moving Bass


Posted By: Ajsski99
Date Posted: 25 February 2021 at 12:00am
Just found them, thanks very much :)

Think I’m going to go with the Fane CD131, as the cabs are only going to be used as monitors. Do you know if I will have to change the crossover within the cabs? The 15” driver is rated at 8ohms if that helps.

Thanks, Ajsski99


Posted By: Wikl109
Date Posted: 25 February 2021 at 12:02am
Pretty certain that model was just a piezo for the top end so there probably isn't a crossover as such. Maybe a capacitor if you're lucky.
The horn may not even take a standard screw thread comp driver.
With buying x-overs and new drivers this could work out pricey.

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Cheers, Chris.


Posted By: GAZ.
Date Posted: 25 February 2021 at 8:08am
Yes, a quick google reveals these speaker had piezo drivers in, so indeed there will be very little in the way of crossover components in there. If you’re on a budget it might be wise to just buy replacement piezo units which will not require any further alterations and be considerably cheaper than buying compressions and appropriate crossovers.
Also if you do decide to upgrade and fit compressions, I had cd 130’s once and I didn’t like them. Very harsh sound. The cd 150 is a far superior unit.

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100% Earth Moving Bass


Posted By: APW
Date Posted: 25 February 2021 at 10:03am

The later SEM version definitely has a piezo, the SE version the is older version and is rated slightly higher power than the SEM version, the SE states the crossover frequency as 3.2Khz (way too high for a 15”!!) on the rear of the cabinet, I’m not saying the SE version definitely has a proper comp driver but without looking at what’s still inside the cabinet we are grasping at straws here….

Another thing to bear in mind, these things often sell for well under £100 per pair working (there is a single one on ebay currently for £12.00) , they are NOT worth putting £60 quid’s worth of comp drivers (£180 for the CD150 sugested above!!) + adapters + possible xovers into the chipboard/MDF cases.



Posted By: markie
Date Posted: 25 February 2021 at 12:25pm
I have a few screw on compression drivers which can be very cheap. But of course you still have to sort some kind of crossover. Probably best to get a couple of  screw fit piezos.

I have used the ones below and they are quite good.

https://www.ebay.co.uk/itm/PIEZO-HORN-DRIVER-for-SOUNDLAB-SKYTEC-KAM-SPEAKERS-100mm-DIAMETER-LG/151178335498" rel="nofollow - https://www.ebay.co.uk/itm/PIEZO-HORN-DRIVER-for-SOUNDLAB-SKYTEC-KAM-SPEAKERS-100mm-DIAMETER-LG/151178335498 ?


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If it's got wheels or tits it's gonna cost a fortune


Posted By: APW
Date Posted: 25 February 2021 at 1:26pm
Originally posted by markie markie wrote:

....
I have used the ones below and they are quite good.

https://www.ebay.co.uk/itm/PIEZO-HORN-DRIVER-for-SOUNDLAB-SKYTEC-KAM-SPEAKERS-100mm-DIAMETER-LG/151178335498" rel="nofollow - https://www.ebay.co.uk/itm/PIEZO-HORN-DRIVER-for-SOUNDLAB-SKYTEC-KAM-SPEAKERS-100mm-DIAMETER-LG/151178335498 ?


Terralec sell the same ones for £5.75 each inc delivery:
https://www.ebay.co.uk/p/1518641253" rel="nofollow - https://www.ebay.co.uk/p/1518641253



Posted By: Ajsski99
Date Posted: 25 February 2021 at 2:07pm
Im pretty sure the tweeters in these boxes are indeed piezio tweeters.
There doesnt seem to be a "crossover board" either, just some capacitors and resistors (I assume?) hot glued to the bottom of the cab.
Here are some pictures of the inside.

https://ibb.co/d2Fh5PN" rel="nofollow - https://ibb.co/d2Fh5PN
https://ibb.co/SxLTm6G" rel="nofollow - https://ibb.co/SxLTm6G
https://ibb.co/hyfvYLc" rel="nofollow - https://ibb.co/hyfvYLc


Posted By: APW
Date Posted: 25 February 2021 at 2:12pm
Yep, they are the same as the ones posted in the links above by Markie and myself.


Posted By: Earplug
Date Posted: 25 February 2021 at 2:30pm
"The horn may not even take a standard screw thread comp driver."

No, I'm pretty sure that it uses the same thread. The piezo drivers linked to above will definitely have the same thread as your "srandard" 1" comp driver.   Smile

But as noted - really not worth doing...   Embarrassed




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Earplugs Are For Wimps!


Posted By: APW
Date Posted: 25 February 2021 at 2:42pm
They are probably worth spending 10 to 15 quid on but not much more!!


Posted By: Wikl109
Date Posted: 25 February 2021 at 10:37pm
As Earplug says it looks like they are a standard thread so a proper screw thread comp driver will fit but it really isn't worth it.
It looks as though the piezo's linked to above are the same so buying a replacement pair of those should get these back up and running for less than £15.
Doing this will also mean they've been put back to 'as new' condition if you ever decide to sell them on.

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Cheers, Chris.


Posted By: markie
Date Posted: 25 February 2021 at 10:48pm
I used one of those piezos in a lockdown (1)  project. I had a pair of Faital Pro 6FE100s laying around I put them in a box with a Selenium HM17-25 horn.

Rather than bothering with a crossover I put the piezo on the back of the horn with a 4u7 polypropylene cap and a resistor. Results were surprisingly  good.

I used it with a 10" sub (Volt) to play some tracks after the "Clapping for the NHS" last summer.


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If it's got wheels or tits it's gonna cost a fortune


Posted By: njw
Date Posted: 27 February 2021 at 11:50pm
Originally posted by APW APW wrote:

Originally posted by markie markie wrote:

....
I have used the ones below and they are quite good.

https://www.ebay.co.uk/itm/PIEZO-HORN-DRIVER-for-SOUNDLAB-SKYTEC-KAM-SPEAKERS-100mm-DIAMETER-LG/151178335498" rel="nofollow - https://www.ebay.co.uk/itm/PIEZO-HORN-DRIVER-for-SOUNDLAB-SKYTEC-KAM-SPEAKERS-100mm-DIAMETER-LG/151178335498 ?


Terralec sell the same ones for £5.75 each inc delivery:
https://www.ebay.co.uk/p/1518641253" rel="nofollow - https://www.ebay.co.uk/p/1518641253

   

 I've got a pair of those kicking about in a box of old drivers in the garage, you're more than welcome to them OP if you cover the postage, although it may be more economical to order new units from the links above.. 


Posted By: markie
Date Posted: 28 February 2021 at 2:14am
Just found this on the net. It suggests a method of improving the sound of piezos. Perhaps someone could comment on this???

http://www.frugal-phile.com/piezo-XO.html" rel="nofollow - http://www.frugal-phile.com/piezo-XO.html




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If it's got wheels or tits it's gonna cost a fortune



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