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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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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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

Product ID: 232575716

Details

Brand
Donner
Color
Grey
Ear Placement
In Ear
Form Factor
In Ear
Impedance
10 ohm

🎧High power for professional headphones

🔋12-hour Li-ion battery life

🔌XLR & TRS input with locking

59913CFA

Duties & taxes included

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Elevate your in-ear game—power, precision, and portability in one sleek amp!

UNMATCHED ENDURANCE - Keep your sound alive with a full 12-hour rechargeable battery—no mid-gig power drops.
COMPACT CLIP READY - Sleek metallic belt-clip design means your personal monitor amp goes wherever you do—stage, studio, or commute.
PRO GRADE AUDIO BOOST - Amplify every detail with high power output tailored for high-impedance professional headphones.
VERSATILE CONNECTIVITY - Seamlessly switch between XLR and TRS inputs with secure locking for zero signal loss.
CRYSTAL CLEAR MONITORING - Experience pristine, noise-isolated sound reproduction that keeps you locked in your mix, even in noisy environments.

The Donner EM1 is a rechargeable, portable in-ear monitor amplifier designed for professional audio monitoring. Featuring a robust 12-hour Li-ion battery, high power output for high-impedance headphones, and versatile XLR/TRS inputs with locking mechanisms, it delivers clear, noise-isolated sound in a compact, metal belt-clip form factor—perfect for musicians and audio pros on the move.

Specifications

ASIN	B08D8WZDTC
Additional Features	Rechargeable
Age Range Description	Adult
Antenna Location	musicians on stage, practicing instrument, and noisy environments
Audio Driver Type	Balanced Armature Driver
Battery Average Life	12 hours
Battery Charge Time	12 hours
Best Sellers Rank	#22,204 in Electronics ( See Top 100 in Electronics ) #44 in Headphone Amps
Brand Name	Donner
Built-In Media	Cable
Cable Features	Retractable
Color	Grey
Compatible Devices	Smartphone
Connectivity Technology	Wired
Control Method	Push Button
Control Type	Volume Control
Customer Reviews	4.3 4.3 out of 5 stars (875)
Earpiece Shape	In-Ear
Enclosure Material	Metal
Headphone Folding Features	In Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	In Ear
Impedance	10 ohm
Item Weight	0.1 kg
Manufacturer	Donner
Model Name	EM1
Model Number	EM1
Noise Control	Sound Isolation
Number of Items	1
Specific Uses For Product	Professional Audio Monitoring, Stage Performance
Unit Count	1 Count
Warranty Description	1 Year Manufacturer

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