![]() I tested with the power-hungry Sennheiser HD 600 and iPhone 5S at a “normal” but pretty healthy volume level. Power details in the specs above.Įar Men claims up to 10 hrs of play time but does not give you specifics on the setup. The EarMen TR-amp works well with the Sennheiser HD 300 Ω impedance headphone (and therefore most on the market), but its 350 mW into 32 Ω would probably not drive more exotic 600 Ω headphones well. Independent of the switch position both headphone outputs are always operative and two people can listen simultaneously. In the “Pre Out” position, the TR-amp’s volume control is activated. in the “Direct” position, the EarMen TR-amp’s volume knob is being disabled and the full-strength signal is being transferred through the”Line Out” into the external amp, which requires its own volume control. The switch serves the purpose of specifying the volume control. The EarMen TR-amp’s amplifier function can be bypassed when connecting it to a (more powerful desktop) amplifier through the 2 RCA outputs. To clarify: difference between pre-out and direct (line out) is, pre-out will make the volume control work, direct will bypass it so that line out is the full volume (will need external volume control). That little LED serves mainly as an audio format indicator, and less so than a battery indicator: EarMen TR-amp is on (“white”), connected/PCM (“green”), MQA (“magenta”), DSD (cyan), charging (“flashing blue”), and low battery (“flashing red”). The “On-Off/Volume” is nicely protruding out and therefore convenient to handle. The front panel of the EarMen TR-Amp features 2 outputs: a 3.5 mm and a 6.3 mm, which points to its particular suitability for full-sized headphones. “The music plays” – as they say – in the front and back panels… I like using it in bed with my phone, where size does not matter…at least amp size does not. The EarMen TR-amp is a rather large for use on the road – I’d store it in my pocket rather than strapping it onto my phone. Cannot be used as an amp only as it has no analog inputs.There is no choice of different digital filters.Handles even power-hungry headphones well, imo up to 300 Ω.…Or runs on its built-in 3700 mAh battery.Plays and charges simultaneously through its two USB-C ports (5V power supply/charger).Drives small loudspeakers through its RCA outputs.Plays two earphones/headphones simultaneously through its two outputs (3.5 mm/6.3 mm).Works as a pre-amplifier or dac when connected to a dedicated headphone amplifier.Can be connected to phone or Windows/Mac computers or Android/iOS sources.The EarMen TR-amp connects to smartphones vial plug ‘n’ play, it needs a driver for Windows ( download) and none for the Mac. The EarMen TR-amp features the TOTL ES9038Q2M SABRE dac chip and the Texas Instruments TPA6120 headphone amplifier chip. The build is so sturdy that you can probably use it in self-defence – and it will still work thereafter. Rubber feet on the bottom prevent the metal chassis from being scratched/scratching the underlying surface such as a smartphone. The case is of sturdy aluminum, knob and switch are metal, there is nothing plastic. rubber ring (for strapping TR-amp to phone).Headphone Amp with Texas Instruments TPA6120 chip: I apologize to EarMen that it took me so long to write this article. This worked so well and the TR-amp so so easy to operate that I had real problems writing an actual review other than telling you that it “works well and is really good”. I have used the EarMen TR-amp for 4-5 months, mainly with the 300 Ω Sennheiser HD 600 headphones. The production is currently in Krusavec, Serbia. The new Chicago warehouse has its focus on the North American market. Earmen is registered in the US, where most of its stakeholders are from. The company is a subdivision of premium manufacturer Auris Audio. The EarMen TR-amp review was previously published at You also find it on the blog's Wall of Excellence: ĮarMen recently appeared big on our radar out of nowhere, with their two models the TR-Amp (“transportable amp”) and the Sparrow dongle. The EarMen TR-Amp is a powerful neutral but not sterile of generic sounding integrated headphone amp (dac/pre-amp) that drives headphones up to 300 Ω) with ease.
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