Used – Tested and Working
This is a used Stax SRM-1/MK-2 electrostatic headphone amplifier. It has been fully tested and confirmed to be in working condition. This unit is highly regarded for its detailed, transparent sound and compatibility with Stax Pro Bias headphones.
The item will be securely packed and shipped from Japan.
Since October 2025, the US eliminated the $800 de minimis exemption — most sellers now ship DDU, meaning buyers receive unexpected customs invoices after delivery.
MonoHonpo ships every US order DDP (Delivered Duty Paid). Your listed price includes the item, international shipping, US customs duties, and import taxes. When the package arrives, you pay nothing more.
We accept eBay Managed Payments (credit cards, PayPal, Apple Pay, Google Pay). Import duties and taxes for US buyers are prepaid (DDP). International (non-US) buyers are responsible for their country's import duties. To cancel after purchase, please contact us immediately.
This item may also be listed in our physical workshop in Tokyo. In rare cases it may sell in-store before an online order is processed. If this occurs we will notify you immediately and issue a full refund.
Questions before purchase are always welcome — messages answered within 24 hours on Tokyo business days. If something about the item doesn't match the description on arrival, contact us first: we cover return shipping on misdescribed items.
One workbench in Tokyo. Every item sits on the bench for a full session before it is photographed, graded, and packed. If it doesn't test clean, it doesn't list.
We specialize in industrial sensors & test gear, vintage Japanese audio, and hand-selected specialist tools. US buyers get DDP on every order.