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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a self-contained wireless pair you can wear all day and fold into a bag, choose LORELEI B-C6; if you need a wired amplifier to drive high-impedance in-ear or on-ear monitors, choose Donner EM1. These two products only look like competitors because both sit in the "portable headphone" aisle. In reality they solve completely different problems, and knowing which problem is yours is the entire decision.
• LORELEI B-C6 biggest strength: a 50-hour battery plus Bluetooth 5.3 and an over-ear fit — a complete listen-anywhere package with no extra gear required.
• LORELEI B-C6 biggest trade-off: it is built around convenience and bass-forward listening, not studio-grade reproduction, and its noise control is sound isolation only.
• Donner EM1 biggest strength: a rechargeable stereo amplifier with XLR and TRS inputs that can push high-impedance professional monitors to usable volume.
• Donner EM1 biggest trade-off: it is not a headphone at all — it has no drivers, no microphone support, and needs a source and a pair of monitors before it does anything.
• Buy the LORELEI B-C6 if you want one box that handles travel, calls and home-office listening straight out of your phone or laptop.
• Buy the Donner EM1 if you already own high-impedance in-ear or on-ear monitors and need more level, especially on stage or in loud rooms.
The B-C6 is the "grab it and go" option. A single charge is rated for 50 hours of playback from a 500mAh battery, and when the battery does run down you can plug in the included 3.5mm cable and keep listening. That combination matters more than it sounds: it means the headphones are never fully out of commission on a long trip, and you are not hunting for a charger mid-flight.
The physical design is aimed squarely at portability. The ear cups rotate inward 100 degrees and fold inward 120 degrees, and the folded footprint is roughly 6.7 by 5.6 by 3.15 — small enough to drop into a bag rather than wear around your neck. Protein ear pads and a multi-level adjustable headband handle the comfort side, and the whole thing weighs about 11.2 ounces. Dual 40mm dynamic drivers cover a 20Hz–20kHz range at 32 ohms impedance, tuned for deep bass rather than flat reference sound. Bluetooth 5.3 with a 10-meter range and a built-in microphone round it out for calls, and the controls are simple push buttons with volume adjustment.
Who should buy it: travelers, commuters, remote workers on calls, and anyone who wants one pair of over-ear headphones for music and meetings without buying extra equipment. Who should skip it: anyone chasing neutral, reference-grade reproduction for mixing, and anyone who needs active noise cancellation — the B-C6 relies on sound isolation from the ear pads, not electronics. If you are weighing cost, check the current price on Amazon before deciding.
The EM1 is a different animal entirely, and it is worth being blunt about that. It is a portable analog headphone amplifier — a belt-pack-style box that takes an XLR or TRS input and sends amplified stereo audio out to a 3.5mm jack. There are no drivers inside it. You cannot listen to it on its own, and Donner states plainly that it does not support a microphone. If you are looking for headphones to wear on a plane, this is not that product.
What it does is solve a real and specific problem: getting enough volume out of high-impedance professional in-ear or on-ear monitors, even in noisy surroundings. A Li-ion battery runs it for up to 12 hours per charge, with LED indicators for power and charging status. The input section uses XLR and TRS connectors with a locking mechanism, plus a stereo/mono source switch that depends on how your cable is wired. Donner positions it for professional in-ear/on-ear monitoring with high audio reproduction and no added coloration — the point is clean gain, not a sound signature.
The carry story is a solid metallic belt-pack clip and a compact, high-tech body designed to travel. That clip is the tell: this is gear meant to ride on a belt or waistband while you move around a stage or a rehearsal space.
Who should buy it: musicians, performers and engineers who already own high-impedance monitors, need more headroom, and want a wired, low-latency signal path. Who should skip it: casual listeners, commuters, and anyone who wants to make phone calls — no microphone support, and no wireless at all.
• Best for battery life on a single charge → LORELEI B-C6 (rated 50 hours versus up to 12 hours for the EM1).
• Best for wireless freedom → LORELEI B-C6 (Bluetooth 5.3, 10-meter range; the EM1 is fully wired).
• Best for taking calls → LORELEI B-C6 (built-in microphone; the EM1 explicitly does not support one).
• Best for driving high-impedance professional monitors → Donner EM1 (that is its stated purpose).
• Best for stage and rehearsal use → Donner EM1 (belt-pack clip, XLR/TRS locking inputs, stereo/mono switch).
• Best for travel and packing → LORELEI B-C6 (folds to roughly 6.7 × 5.6 × 3.15 and includes a bundle pocket).
• Best for bass-forward casual listening → LORELEI B-C6 (dual 40mm drivers tuned for deep bass).
• Best for a clean, uncolored signal path → Donner EM1 (amplification with no audio rendering).
• Best as a complete out-of-the-box solution → LORELEI B-C6 (headphones, cable, charging cable and pouch included; the EM1 needs a source and monitors).
In my opinion, most people searching "portable headphones" should buy the LORELEI B-C6. It is a finished product: you charge it, pair it, fold it, and go, with 50 hours of playtime, a wired fallback, a microphone for calls, and a folded size that actually fits a bag. The Donner EM1 is excellent at what it does, but it is a tool for a narrower job — powering high-impedance monitors on a wired rig — and it is useless to anyone who does not already own that gear. Buy the LORELEI B-C6 unless you specifically need amplification for professional in-ear or on-ear monitors, in which case the EM1 is the right call.
how to use external headphones on mac
Connect the headphones to your Mac the same way you would to any source. The LORELEI B-C6 pairs over Bluetooth 5.3, or you can use the included 3.5mm cable if your Mac has a headphone jack or you have an adapter. The Donner EM1 is not a headphone, so it cannot be used this way — it amplifies a signal from a source into a separate pair of monitors.
how to connect mobile headphones
For the LORELEI B-C6, charge it with the Type-C cable, power it on, and pair over Bluetooth; the push-button controls handle volume. If you prefer a wired connection, the 3.5mm braided cable works when the battery is low. The Donner EM1 connects differently: audio comes in through its XLR or TRS input from your source, and out to your monitors via the 3.5mm output jack.
how to connect c port headphones
A USB-C port is for charging on these products, not for audio. The LORELEI B-C6 charges via its Type-C cable and then connects to your device over Bluetooth or the 3.5mm jack. The Donner EM1 charges from its Li-ion battery with LED indicators showing power and charge status, while audio travels through its XLR/TRS inputs and 3.5mm output.
how to pack headphones
The LORELEI B-C6 is the one designed for this: the ear cups rotate inward 100 degrees and fold inward 120 degrees, bringing it down to roughly 6.7 × 5.6 × 3.15, and it ships with a black leather bundle pocket to store it in. The Donner EM1 is a compact belt-pack device with a metallic clip rather than a folding headphone, so it packs as a small accessory instead.
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See also: Donner EM1 vs Bestier 42-Inch: Monitor Headphones, WIWU Apple AirPods Max vs TUNYINSH Case: Portable Headphones, LORELEI X8 vs Getgold Professional Over-Ear Headphones