For sale is this preowned Singxer SA-1 Class A headphone amplifier tested and in excellent condition, with original box, instruction manual, US AC power cord. I am the original owner and have used the amplifier infrequently; I bought a better knob for the volume control that is slightly bigger and gives you finer control over the volume. Only the updated knob is included. Works fine, no issues. There are a couple of small scrapes on the top left of the case - please see all pictures. I will ship same or next day via USPS Parcel Select Ground. Thanks for looking! Heres a blurb giving details about the SA-1: For headphones in need of classic analog amplification with modern performance, the SA-1 balanced headphone amp from Singxer is a class-leading fit. Equipped with Singxer’s own custom, four-way fully discrete Class A amplifier circuit, the SA-1 is all analog—from the internals all the way to the controls. This pure analog design delivers warm and expressive amplification devoid of any EMI interference caused by digital components, making the SA-1 loud, and quiet, in all the right ways. With an impressive signal-to-noise ratio of 126 decibels, it won’t be sending your ears anything but pure signal. And with XLR and RCA inputs alongside a wide range of outputs—including 4-pin XLR, 4.4-millimeter balanced, and 6.35-millimeter single-ended options—it’s capable of handling preamp or headphone amp duties in virtually any setup. Other Notes: Call it beginner’s luck or pure talent: Singxer has knocked this one out of the park. The SA-1 offers superb amplification, vanishingly low noise floor, and nominal distortion. It’s a great choice for anyone looking to graduate to a high-end balanced amplifier that can double as a preamp.

For sale is this preowned Singxer SA-1 Class A headphone amplifier tested and in excellent condition, with original box, instruction manual, US AC power cord. I am the original owner and have used the amplifier infrequently; I bought a better knob for the volume control that is slightly bigger and gives you finer control over the volume. Only the updated knob is included. Works fine, no issues. There are a couple of small scrapes on the top left of the case - please see all pictures. I will ship same or next day via USPS Parcel Select Ground. Thanks for looking! Heres a blurb giving details about the SA-1: For headphones in need of classic analog amplification with modern performance, the SA-1 balanced headphone amp from Singxer is a class-leading fit. Equipped with Singxer’s own custom, four-way fully discrete Class A amplifier circuit, the SA-1 is all analog—from the internals all the way to the controls. This pure analog design delivers warm and expressive amplification devoid of any EMI interference caused by digital components, making the SA-1 loud, and quiet, in all the right ways. With an impressive signal-to-noise ratio of 126 decibels, it won’t be sending your ears anything but pure signal. And with XLR and RCA inputs alongside a wide range of outputs—including 4-pin XLR, 4.4-millimeter balanced, and 6.35-millimeter single-ended options—it’s capable of handling preamp or headphone amp duties in virtually any setup. Other Notes: Call it beginner’s luck or pure talent: Singxer has knocked this one out of the park. The SA-1 offers superb amplification, vanishingly low noise floor, and nominal distortion. It’s a great choice for anyone looking to graduate to a high-end balanced amplifier that can double as a preamp.