Diaphragm film - Minimum Quantity 10 Metres

3.2 micron
, manufactured by Toray , Japan. Excellent transient response and bass reproduction.

3.5 micron Genuine Dupont Mylar C 670 mm wide uncoated. Best all round performance. Price per metre

4.2 micron Genuine Dupont Mylar C. 670 mm wide uncoated. Excellent transient response with good durability and ease of use.

AUD $6.00 per metre

AUD $5.80 per metre

AUD $5.00 per metre

6.0 micron Hostaphan Tensilised uncoated film, great compromise between performance and durability,
800mm wide. Price per metre.

AUD $4.70 per metre

12 micron x 650 mm wide, Aluminised Low S/R, works best on tweeters


AUD $3.30 per metre


    All film has a minimum order quantity of 10 metres and is supplied on a roll - not folded.

Note, all film is rolled from the master roll to a smaller shipping roll with no contact from either the machine or the hands of the operator. The first 300mm and the last 300mm will be handled to attach and terminate the film from the roll. We always add an extra metre or so to allow for the handled material.

Conductive Coating - Re formulated for easier application

Our Clear conductive coating is currently unavailable due to problems with supply of the raw materials.

However, we are able to supply our Opaque coating (black) as a substitute. Surface resistivity is typically around 500 megohms/sq but can be varied by dilution and gauge of application. Supplied as a concentrate to be diluted 1:1 with distilled water.
Typical coverage is 1.2 ml per 900 sq cm (1 square foot)

AUD $36.00 for 30 ml

AUD $45.00 for 50 ml.


Note, the above coatings are proprietary to E R Audio and are supplied on the condition that they are not used commercially, reproduced or analysed. Acceptance of the product implies acceptance of this condition.


Why mess with 2 pack epoxies? We have the answer to ESL Assembly

Is used for stator to panel bond, air gap spacers to panel or to stators. This adhesive gives a very strong bond in shear and peel. Slow curing gives time to get things exactly right. Can also be used to damp stators to prevent ringing.  

AUD $25.00, 100 ml


Diaphragm Adhesive

Most adhesives have difficulty bonding polyester film to typical ESL panels, having poor peel characteristics. Our polyurethane based adhesive will bond diaphragms strongly and reliably. Slow cure time allows plenty of time to get things just right.
Some adhesives leave a hard brittle edge where it squeezes out from the join. This edge can damage the film as it flexes over it. The polyurethane adhesive leaves a “soft” edge where the adhesive squeezes out of the join, which will not damage the film.

AUD $12.30 30ml
applicator bottle


EHT Cable

Tried sourcing a genuine high voltage cable in a small package? We have silicone rubber insulated high voltage cable in 3.2 mm O/D rated at 10 kv.Can be used for audio signal as well as bias supply. Available in Green and Beige.

AUD $4.80 per Metre


High Voltage Diodes, UF 4007

Ultra fast 1kv rated. Suitable for Quad and most other EHT supplies

AUD $1.40

High Voltage Capacitors .01uf 3kv rated

Ceramic capacitors for high voltage supplies, suitable replacements for Quad and B&W DM 70 EHT supplies etc

AUD $1.65

EHT Resistors

Genuine high voltage high value resistors are hard to get. We stock the Philips VR37 range of high voltage resistors in 10, 22 and 33 megohms. Rated at 3500 volts, these are ideal for diaphragm bias current limiting.

AUD $2.50


10 kv EHT resistors VR 68 Series

100k - 470k 1 watt Metal Oxide Resistors. Used in the secondary side of the audio transformer in series or parallel to provide frequency filtering to the ESL panels.

AUD $2.50

Tensioning Gauge

This device is used to tension diaphragm film to the tension required for your project. Comes complete with full instructions to enable quick and repeatable results

AUD $21.40


Construction Manual

This 108 page* manual is supplied in our ESL III and ELS 5 kits. Can be purchased separately and used as a guide for custom design construction. Invaluable!
(*At last count, subject to continuous improvement)
Now includes construction notes for our Acorn speaker, better value than ever.

AUD $44.00


Or emailed .PDF
(save on postage)

Copper EHT Foil

It is essential to provide an EHT rail around the perimeter of the diaphragm. This is best applied to the surface of the air gap spacer that comes into contact with the conductive coating. Our foil is 4 and 6mm wide, 25 microns thick, self-adhesive and can be soldered.
Specify which width you require

AUD $29.30


33 metre roll


Termination / Connection Blocks

Essential for terminating the above foil tape 

AUD $3.00

High Quality Grille Cloth

Available in Black, navy blue and burgundy, other colours coming soon. This grille cloth is acoustically transparent and acts as a very good barrier to dust and insects that can cause problems with the operation of your ESL’s – highly recommended. 2 way stretch allows for easy fitting. 1.5 metres wide. Ask for a sample swatch!!

AUD $20.40
Per Metre


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EHT cable

Rated at 6kv. Fine conductor, 24awg, suitable for audio signal applications from the transformer secondary.

3 colours available, Brown, Green, Blue.


AUD $3.60 per metre


EHT Resistors RJ81 Series

100 Megohm 1 watt rated at 3.500v but will tolerate much higher voltage with low current.

AUD $3.00 Each

For those that want to use the original film on their Quad 57 treble panels.

6.0 micron ICI Melinex dated 1977. This roll of film was obtained from a retired Quad repairer and was reputedly supplied to him by Quad in the UK for ESL 57 repairs. Still in excellent condition (this type of film does not contain plasticisers so does not dry out).

AUD $6.00 per metre

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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