do both headphone outputs get the same mix?

Dear Customer, yes, the output is all the same.

can you control the volume of each headphone output independently?

No, one and two headphone outputs are linked together via the large volume knob

Can I plug my electric bass directly in to this and use it as a headphone amplifier?

Whoever made the 2nd answer also has no experience with the device, almost identical is not this specific device. I pluged in my bass and only got a mono signal when I used my regular guitar cable. Luckily I had a cable that has the regular 1/4 inch jack (TRS) at one end and a male XLR (circular with 3 prongs inside) on the other end, I then got a stereo sound. The only switch on the device is the on/off switch....so the switching they talk about in the description is switching the cable that you use.

The amplifier is made in China.

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🎧 Power your sound, own your space.

ALL DAY ENDURANCE - Rechargeable Li-ion battery powers your sessions for up to 12 hours—no mid-gig interruptions.
COMPACT CLIP READY - Sleek metallic belt-clip design keeps your amp secure and portable wherever you go.
SEAMLESS CONNECTIVITY - Locking XLR and TRS inputs ensure stable, professional-grade audio signal integrity.
PRECISION AUDIO CONTROL - Stereo/mono switch and volume control let you tailor your sound with ease and accuracy.
UNMATCHED POWER FOR PROFESSIONALS - Delivers robust volume even in noisy environments with high-impedance headphone support.

The Donner EM1 is a rechargeable, portable in-ear monitor amplifier designed for professionals demanding high-fidelity audio and reliable volume control. Featuring a durable metal build, locking XLR/TRS inputs, and a 12-hour Li-ion battery, it ensures uninterrupted, crystal-clear sound in any environment. Its compact design with a belt clip makes it the perfect companion for on-the-go audio mastery.

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NT$3941

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Material	Metal
Item Weight	0.1 Kilograms
Battery Weight	11.5 Grams
Color	Grey
Includes Rechargeable Battery	Yes
Lithium Battery Voltage	3.7 Volts
Battery Cell Composition	Lithium Ion
Battery Description	Lithium-Ion
Headphones Form Factor	In-Ear
Noise Control	Sound Isolation
Number of Batteries	1 Lithium Ion batteries required. (included)
Compatible Devices	Smartphone
Control Type	Volume Control
Power Source	Battery Powered
Special Features	Rechargeable
Fit Type	In-Ear

Donner EM1 Rechargeable Portable Personal in-Ear Monitor Amplifier Analog Headphone Amplifier Stereo Headphone Earphone Amp Volume Control Audio Booster with XLR and TRS Input 3.5mm Output Jack

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