Mar 18, 2022 · Is there a published STAX amplifier/bias schematic to "study"? You definitely need a 5M resistor in the path to limit the current flow. Exactly, 5M resistor needed. And I will follow what Kevin Gilmore is saying above. You must log in or register to reply here.

The following is a list of Stax products, items manufactured by Stax Ltd. Headphones. Currently in production. Earspeaker Model No. Release Year Bias Type Notes SR-003MK2 2012 Pro, 5-pin In-Ear SR-X1 2024 Pro, 5-pin SR-X9000 2021 Pro, 5-pin Omega series, Current Flagship SR-009S 2018 Pro, 5-pin Omega series SR-007Mk2 / SR-007A ...

Oct 12, 2015 · In my powered Stax converters, which run off 117V, the power cord actually goes directly to the bias circuit with only a 0.3 amp fuse as protection, but using an additional transformer as spritzer suggests is much safer.

The SR-003MK2 is a 5-pin PRO bias type in-the-ear earspeaker, and can be used by connecting to a driver unit having 5-pin PRO bias output socket. The redesigned ear canal type structure of the SR-003 enables you to enjoy excellent electrostatic sound quality without covering your ears.

Jun 3, 2022 · If the transformer outputs 435VAC, you will have a standard 580VDC pro bias. because there is no voltage regulator, the turn ratio of transformer will be conservative for wider range of voltage fluctuation.

There are two different bias voltages for Stax earspeakers. The first earspeakers have a 230 volt bias, referred to as “Normal” bias. The later earspeakers have a 580 volt bias, referred to as “Pro” bias.

Nov 9, 2008 · Self Bias (SB) mean that it tap the bias supply for the headphone from the audio signal fed it from the speaker amplifier. While non-SB units plug into the mains (wall plug) for power to the bias supply.

Jan 17, 2023 · In this post, I collected information related to a few modifications aimed to improve the Stax SRD-7 family (Stax normal bias transformers, to let us drive the older normal bias Stax headphones out of a speaker amplifier).

Nov 28, 2020 · Can you kindly elaborate a bit about the bias adjustment - if it drifts after the input voltage has been changed from 100V to 240V, will it have to be readjusted? And if it's left untouched, how will that affect the unit's performance?

Mar 14, 2013 · Recently I have been trying to work on a very cheap stax amp that aims to drive electrostatic headphones. Thanks to the help of the headfiers here, especially to Frank, who offered to send me the 6pin female connectors for free.