Matrix M-stage Amplifier - Class A headphone amplifier - HPA-1

Description

Matrix M-stage Amplifier - Class A headphone amplifier.
Gently used.
From Headfonia review:
The M-Stage comes with two pairs of RCA inputs, an RCA output, and four steps of gain settings, which makes this amp highly versatile.
Having two pairs of RCA inputs is a nice convenience, and the RCA out allows the Matrix to be used as a pre-amp.
It comes with four gain settings: 0, 10, 18, and 20 dB of gain, which can be changed through the dip switches below the amplifier chassis.
Four gain steps turn out to be a major plus feature for the M-Stage, as that makes it a very versatile amp for driving anything from IEMs to big headphones.
The lowest gain setting is very ideal for IEMs. Using the JH16Pro IEM, I’m listening comfortably at around 11 O’clock, which is nice since that gives you some real control over the volume, even for low level listening.
What’s more the M-Stage is hiss free all the way to just a tad below the maximum volume, even with the JH16Pro IEM!
For big and hard to drive headphones, gain 18 and 20 is recommended.
plenty of gain to drive either the HD800 or the HE5LE headphones.
The Matrix will drive just about anything you need short of speakers.