Important Notice, August 2018

We have recently changed to the NBN which has resulted in emails to addresses shown on this website being lost in the ether!! This is in the process of being corrected. If you have enquired recently regarding any of our products or services and have not received an answer please contact us on ++61 8 9397 6212.

Well, another new year arrives with some changes to be made. More information and updates are now available on our 505 mini panel page. Click on the link or on the Mini Panel box to the left to read about it and see what it looks like.

Follow this LINK to read a recent review for our new 3 transformer version of the Acorn ESL.

While we have endeavored to maintain our low pricing, inevitably there are some increases to be made due to raw material increases and the drop in the Oz dollar. Be sure to refresh this page from your server so you see the revised pricing.

Sadly we are discontinuing our venerable and well respected ESL III, however, a replacement is under way and should be on this site in around 3 months.

If you own some Quad 57 electrostatic loudspeakers that are in need of repair we have posted a complete repair story from Meinolf, a client in Germany. Click HERE to take you to this page.

Our flagship ESL kit, the Acorn, has undergone some improvements to the structure and electronics, go to our Acorn page or click here to see what we’ve done.

US Distributor:- Mike Beck at Beck Audio

We have added a Donation Page to the web site. This has been created because we have had customers that we have helped through tricky repairs want to donate some money as a thank you for the assistance we have provided. 

Go to DONATE to read more.


Exciting new product, the 505 panel and

dynamic bass system.

Following the unexpected unavailability of the 440 mini panel ESL we decided to create our own improved version. Our customer feedback on the 440 product was very good indeed with the only criticisms being low sensitivity and a narrow dispersion pattern.

Because we started out with a clean canvas we had the freedom to design to our wish list which has led to a very nice loudspeaker. The panel has grown in height a little going from 440mm to 505mm, width has reduced from 168mm to 150mm. The panel thickness has reduced from 8mm to 5mm allowing a very slender frame to be used.

These changes plus changes to the conductive surfaces within the panel have resulted in a panel with excellent frequency response, dispersion and sensitivity

As with the 440 mini panel, the 505 ESL panels are supplied ready to be mounted in a baffle of your choice be it Perspex, glass, timber, lacquered MDF etc. They come complete with a ready built and tested power supply and audio transformer. All you have to do is mount them in a baffle, connect them up and play some music.

 Goto to our MINI PANEL page for further details


All of the prices shown on this site are in Australian Dollars only.

We are happy to provide a quote in your currency upon application.

Domestic purchases will have GST at the current rate of 10% added.


We will provide quotations for freight or postage of components based on the weight of the package. We will normally quote registered airmail or Pack and Track for overseas small packages and will give a courier option if required.

We normally quote the best rate obtainable at the time of shipping for loudspeaker kits. 

While we make every effort possible to minimise customs duty and taxes, customers should make enquiries whether the intended import will accrue any additional duty or tax in their own country


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While we make every attempt to provide products and service that will suit most customers, occasionally there will be an application that simply does not suit our products.

E R Audio Pty Ltd reserves the right to refuse sale of a product where, in the opinion of E R Audio Pty Ltd, it is not in the best interest of the client to provide it.

Any correspondence that takes place between E R Audio Pty Ltd and an external party is private and confidential.

E-mail messages sent from E R Audio Pty Ltd to any person enquiring about any of the products shown on our website or for any other reason is also private and confidential and as such may not be copied, reproduced or disseminated in any other form without the written permission of E R Audio Pty Ltd. 

Fine Audiophile Equipment

Designers and Manufacturers of Electrostatic Loudspeakers and Fine Audiophile Equipment

E R Audio Pty Ltd. ACN: 120 797 775, ABN 48 120 797 775


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Please note that domestic sales incur a 10% Goods and Services Tax (GST)