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neddy999 8th May 2010 12:43 AM

Help needed, Rebuild/repair of Final 0.3 hybrid electrostatics
I have a pair of very ill Final 0.3. First I intend to fix the two electrostatic panels. Both panels are very low in volume, and even at this level one distorts whilst the other does not.
I found a kit to fix (!?) them from era audio in australia though they appear to be now defunct, I cannot contact them.
I am not averse to re-design as I understand that these were originally a pig to drive and did not go very loud at all.
As I am a novice when it comes to electrostatics all advice is appreciated.

kavermei 8th May 2010 07:44 AM

Hi Neddy,

if you never built an ESL before this will not be an easy project. There are many things that can go wrong. To bring this to a good end, it would be very good if you could find a fellow DIYer close by, someone who already has some experience with ESLs, and who is willing to assist you.

Of course if you see them as 'sacrificial' speakers, and want to do this as a learning experience rather than being 100% certain you'll get the speakers working again, that's okay too.

Not to put you off, but it's a choice you need to make.


neddy999 8th May 2010 03:28 PM

Help Wanted - anybody in Dublin ? experience with Final 0.3
Hi Kenneth,
thanks for the reply. I had assumed having all the basic elements already would save me a lot of grief.
So, is there anyone out there near dublin ?
Anyone with experience of fixing the Final 0.3 ?

mavric 8th May 2010 11:04 PM

Neddy, can you kindly post some pics? Chinesswong had issues with copper tape corroding. I my self , or Charlie. rebuilt my panels from scratch, my coating was old. from my understanding, disassemble will most likely destroy them. I am speculating here, so a pic is worth a thousand words. There are alot of brilliant people here, take their advice.

Toppsy 10th May 2010 12:39 PM

I'm surprised you have not had a reply from Rob Mackinlay of ER Audio.

I used to be the UK distributer of his ESL kits and repair kits and have always found Rob to most efficient at replying to enquiries and always had quick and helpful replies from Rob. However, it must be nearly a year now since last we communicated.

You may get better feedback by contacting Rob on the following email address or his USA agent Mike Beck at for clarification regards the availability of the Final 0.3 repair kits.

If indeed Rob has stopped trading and selling his speaker kits and ESL repair kits I have a pdf copy the repair instructions for the Final 0.3.

Contact me via pm or email through this forum should you require a copy.

Colin Topps (Toppsy)

torroid88 15th May 2010 12:21 AM


First things first ! ESLs have three main components, the diaphgragm/stator assembly - the actual loudspeaking element, the High Voltage DC Bias supply - that charges up the diaphragm, and the Audio Transformer - that takes the Low Voltage Audio from your amplifier and steps the voltage up to the thousands of volts to provide an alternating voltage to work against the DC Bias voltage and make the diaphragm move.

My experience is with Quad ESLs, but the principles are the same. The problem that Quads have is low or no DC Bias Voltage causing low or no output ! So don't be in a
hurry to "rebuild your panels" until you have eliminated problems with the DC Bias and also with the Audio Drive Signals. Both of these operate at HIGH LEVELS - SEVERAL THOUSAND VOLTS - so are not to be trifled with ! It would be a good idea to accept
the offered PDF of the service manual, and to seek out a local electronics or ham radio
hobbyst who might have the electronic test equipment needed to test the electronic
parts of the speaker ...

neddy999 25th May 2010 04:10 PM

Hi Colin,
I did get a reply from Rob after a while and have signed up for one his kits.

M1ro 12th July 2010 09:58 AM

Ciao Nenade,

I have the same problem with my Final 0.3 speakers here in Rome, Italy.
Did you fix yours by now, was it tricky, and could you send me some hints, photos, guide, etc... (my email is )

btw, it seems we are both working for the ///

Buck R0gers 12th June 2012 11:42 PM

I tried to email ER audio and Shackman for the past few weeks but nuttin~
Guess they are both out of business.
Anybody have a source for the plastic panel material?
Uncle Buck

Pinco Pallino 14th June 2012 01:31 PM


Originally Posted by Buck R0gers (
I tried to email ER audio and Shackman for the past few weeks but nuttin~
Guess they are both out of business.
Anybody have a source for the plastic panel material?
Uncle Buck

Jazzman has published excellent diy instructions including sources of diaphragm material

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