Усилители для наушников — Chord MOJO 2

The Mojo 2 is a pocket-sized, battery-powered converter and headphone amp made by Chord Electronics of Kent, England, released on 31 January 2022 as the follow-up to the first Mojo. Its conversion runs on a custom-coded FPGA programmed by Rob Watts, the company's design consultant. The launch price in the UK was GBP 449. In late 2025 Chord revised the hardware, adding a 4.4 mm headphone socket and switchable USB-C charging with a price of GBP 395.

Key specs that matter

Chord rates the output at 600 mW into 30 ohms (4.2 V RMS) and 90 mW into 300 ohms (5.2 V RMS), and quotes 0.06 ohms output impedance and support for headphones up to 800 ohms. Dynamic range is 125 dB A-weighted and the signal-to-noise ratio 123 dB A-weighted, with noise of 2.7 microvolts. THD+N is 0.0003% at 2.5 V into 300 ohms, channel separation 118 dB at 1 kHz, and frequency response 7 Hz to 20 kHz within 3 dB. PCM is accepted up to 768 kHz and DSD up to DSD256 via DoP. The aluminium case measures 83 x 62 x 22.9 mm and weighs 185 g.

Engineering and use context

Chord's WTA filter uses 40,960 taps computed by 40 DSP cores, and a 104-bit DSP core handles the upsampling. The UHD DSP is a digital tone control that Chord describes as lossless, with 18 steps in each of four bands - lower bass, mid bass, lower treble and high treble. A four-setting crossfeed blends the channels for headphone listening. There is no display, so four coloured polycarbonate spheres handle volume, mute, button lock, crossfeed and tone settings through a menu. Battery management moved into the FPGA, cutting power loss by 75% and adding 9% capacity, with more than eight hours of use per charge. An Intelligent Desktop Mode lets the unit run from mains power without harming the battery. Digital inputs are coaxial, optical, Micro-USB and USB-C, with the highest rates via Micro-USB and coaxial and up to 96 kHz via optical.

Pairing

The 2025 version has two headphone outputs, each remembering its own volume and DSP settings. The very low output impedance suits sensitive in-ear monitors, and the voltage covers most full-size headphones. Chord lists support for Android, iOS, Windows, macOS and Linux, and the unit has been tested with Roon. There is no Bluetooth, but the Chord Poly module attaches to add wireless streaming and microSD playback.

Alternatives

The Chord Hugo 2 is the larger battery-powered DAC and headphone amplifier in the Chord range.