EHT Supply now with on-board regulator

We have ready built and tested (includes plastic box) variable output EHT supplies available. Output can be varied from 1.5kv to over 8kv. Output polarity is selected when ordering. Requires a DC supply from 3 to 15 volts.
65 x 75 x 25 (W x L x H)

AUD $185.00

DIY Kit (output can be negative or positive)

AUD $97.20

Acorn Construction 176

Adjustable Regulator

For non-regulated EHT supplies. Provides a regulated DC output ranging from
<3 volts to > 12 volts.Ready built and tested (one only reqd).
AUD $48.70

the above regulator is supplied on a printed circuit board and is ready to use. It may need to be enclosed in a suitable box depending upon the speaker design.

     DIY Kit Form

AUD $25.40



1:200 Bass transformer.
Used to drive the bass section of our highly regarded Acorn electrostatic loudspeaker.

Power handling is conservatively set at 150 watts with short term peaks exceeding 350 watts.

Frequency response is flat from
20 Hz to 2kHz. driving most typical loads.

Grain Oriented Silicone Steel core,
weight 5.2kg

AUD $390.00


Audio Transformers

Our standard full range audio transformer is a grain oriented silicone steel, multi-sectioned design, with excellent frequency and square wave response. Turns ratio is 1:90, power handling conservatively set at 150 watts continuous and 500 watts impulse. (<200 ms). Weight 4.5Kg

AUD $420.00

Response is < + or – 2dB, 20Hz to 20kHz driving a 1.2 nf load. A 0.6 ohm resistor is used in series with the primary to quell a rising response which peaks at 25 kHz. (resonance). This resistor may be varied to adjust the response for different panel loads.

Note, the appearance may change from that illustrated, electrically the later transformers are the same but are “drop through” design, the 4 through holes are used to mount the transformer on a base plate.


1:100 Treble transformer. Used in the midrange / treble section of our Acorn electrostatic loudspeaker.

Power handling is set at 150 watts with short term peaks of over 250 watts. Frequency response is flat from 150Hz to 20kHz depending on load.
Weight 2.5kg

AUD $245.00




1:88 small panel transformer. As used in the mini panels for bookshelf speakers.

Frequency range 200Hz to 20kHz (depending on load).

Weight 0.4 kg

AUD $85.00

Sold Out



1:100 PCB mount transformer currently used in our 505 mini panels. Can also be used for smaller DIY projects. or larger treble panels

Regular frequency range
150Hz to >20kHz.

Driving a small capacitive load this transformer will go out to around 35kHz.

Weight .67 kg.

AUD $125.00


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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