Electrostatic Transducers
Thin stretched diaphragms and stator grilles are matched, inspected, and set up as complete panels for careful listening.
Metrum Acoustics documents new old stock parts, compact mini DAC builds, and electrostatic transducer designs for listeners and hobby builders. The notes on this page explain how these components are chosen, matched, and set up for stable, accurate listening.
Photographs of transducer panels, converter boards, and stored NOS parts show the construction details that matter during inspection and setup. Each image is taken under even light so that diaphragm texture, solder joints, and component markings can be compared.
Examine the diaphragm and stators under bright, angled light for dust, sagging, or fine scratches, and record anything unusual before applying any bias voltage to the transducer assembly.
Measure the resistance between the stator and the diaphragm connection with a meter set to a high range, because weakened insulators can cause arcing once the bias voltage is applied during normal listening.
Connect the energizer that matches the panel specification, raise the polarizing voltage slowly while listening at low volume, and confirm that the sound stays even across the frequency range before increasing the level.
Route the digital source into the mini DAC with a short, well shielded cable, set the output level to match the amplifier input, and then listen to a familiar recording to judge tonal balance and stereo focus.
NOS stands for new old stock, meaning unused parts made years ago and kept in their original packaging. Each part is checked for age-related drift before it is matched into a panel.
A mini DAC converts a digital source into an analog signal for the amplifier. Compact boards keep the signal path short and simple.
Inspect the diaphragm and stators under angled light, check insulation with a meter, then raise the bias voltage slowly while listening at low volume.
Weakened insulators can cause arcing once polarizing voltage is applied. A resistance check between the stator and the diaphragm connection helps catch faults early.
Use the energizer that matches the panel specification. A mismatched step-up unit can change the bias level and affect how evenly the sound holds across the frequency range.
Route the digital source into the mini DAC with a short, well shielded cable, match the output level to the amplifier input, and judge tonal balance on a familiar recording.
Thin stretched diaphragms and stator grilles are matched, inspected, and set up as complete panels for careful listening.
Small converter boards with short signal paths, sized for desk systems and hobby builds.
Original-packaged new old stock capacitors and spare diaphragms kept on file for future repairs and builds.
Notes on choosing, matching, and setting up new old stock parts, compact converter boards, and electrostatic panels.
Explore transducers