We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-02 · 7 min read · Independent comparison
If you want a self-contained little guitar amp you can play out loud anywhere, choose LEKATO Mini Guitar Amplifier; if you need a clean, wired headphone/IEM stage for silent monitoring, choose SonixForce Headphone Amplifier. Those two jobs sound similar on paper — "small, battery-powered audio box" — but they solve completely different problems, and the spec sheets make the split pretty obvious.
• LEKATO's biggest strength: a real instrument amp you can actually hear — dual speakers, 5W Class D output, Clean and Overdrive modes, plus Bluetooth 5.0 for backing tracks.
• LEKATO's biggest trade-off: it's a practice amp first. The 3.5mm jack is an input/headphone path for private playing, not a dedicated monitor amp with pro connectors, and it only takes a 3.5mm plug.
• SonixForce's biggest strength: a purpose-built wired monitor amp — XLR and TRS inputs, 3.5mm output, Stereo/Mono switch, metal enclosure, and a one-year warranty.
• SonixForce's biggest trade-off: no speakers at all. If you want room sound, it can't give you any — it only feeds headphones or IEMs.
• Pick LEKATO if you play electric guitar, bass or mandolin and want an audible, portable practice rig.
• Pick SonixForce if you're rehearsing, recording or playing live through in-ear monitors and need a quiet, wired feed.
The LEKATO AG-04 is a compact practice amp built around two speakers and a 5W Class D amplifier with two output channels. On the front end you get Clean and Overdrive modes plus three knobs — gain, tone and volume — which is the classic small-amp layout: dial in a clean, articulate tone for chords, then push the gain for a dirtier rock sound when you want it. It's rated for guitar, bass and mandolin, which tells you it's meant as a general-purpose low-volume instrument amp rather than a single-trick box.
Power is a 2000mAh rechargeable battery, with 2–3 hours to charge and up to 6 hours of playing time, charged over USB Type-C (LEKATO suggests a 5V 2A charger). That's the spec that matters most for portability: six hours is a genuinely useful window for a park session, a hotel room, or busking on a street corner, and Type-C means one cable instead of a dedicated brick. Bluetooth 5.0 lets you pair a phone, tablet or PC to play along with tracks — a nice touch for practice, since you can run a backing track through the amp while you play over it.
The 3.5mm headphone jack is the private-practice escape hatch: plug in and the sound goes to your ears instead of the room, with stereo output. The retro woven mesh front, dual speakers and brown finish give it a small-combo look, and at roughly 6.3" x 4.3" x 3.52" it drops into a backpack. It ships with the amp, a Type-C cable and a manual.
Who should buy it: electric guitar, bass or mandolin players who want an audible, rechargeable amp for home practice, travel, or casual outdoor playing, and who sometimes want to go silent through headphones.
Who should skip it: anyone who only ever plays through in-ear monitors, needs XLR or TRS connections, or wants a monitor amp with a metal chassis and a longer warranty. The LEKATO gives you a 6-hour battery and a speaker, not studio-grade I/O.
The SonixForce SP2-W is the opposite philosophy. It's a rechargeable wired headphone amp — an in-ear monitor amplifier, in the product's own framing — with XLR and TRS inputs and a 3.5mm output. That combination is the tell: XLR and TRS are the balanced-style connectors you see on mixers, interfaces and stage gear, so this is designed to sit between a source and your ears, take a proper line-level feed, and hand it to a pair of headphones or IEMs.
It supports Stereo and Mono output modes, which is more useful than it sounds. Stereo for music playback and normal monitoring; Mono when you're checking a single-source feed or want both ears to get the same signal — a common need in recording and stage monitoring. It's listed as compatible with guitar, double bass and keyboard, so it works as a personal monitoring box for instruments too, not just for listening.
The enclosure is metal, which is the right call for something that lives in a gig bag and gets plugged and unplugged constantly. It's white, it's battery powered, it's a single unit with a user manual, and it carries a one-year warranty — a concrete durability/support commitment that the spec sheet states outright. The 7-color LED light is a small quality-of-life detail; on a dark stage or in a dim rehearsal room, being able to see the unit is genuinely handy.
Who should buy it: players and engineers who monitor through wired headphones or IEMs, need XLR/TRS inputs, and want a metal-bodied, battery-powered amp with Stereo/Mono flexibility and a one-year warranty.
Side-by-Side: Which Should You Choose?
• Best for playing out loud → LEKATO Mini Guitar Amplifier. Dual speakers and 5W Class D output mean you hear it in the room; SonixForce has no speakers at all.
• Best for silent, wired monitoring → SonixForce Headphone Amplifier. XLR/TRS in, 3.5mm out, built for headphones and IEMs.
• Best for a long session away from power → LEKATO Mini Guitar Amplifier. Up to 6 hours of playing time from a 2000mAh battery, recharged over Type-C in 2–3 hours.
• Best for pro-style connections → SonixForce Headphone Amplifier. XLR and TRS inputs plus a Stereo/Mono switch; LEKATO works around a single 3.5mm jack.
• Best for backing-track jamming → LEKATO Mini Guitar Amplifier. Bluetooth 5.0 pairs with a phone, tablet or PC so you can play along.
• Best for durability and support coverage → SonixForce Headphone Amplifier. Metal enclosure and a stated one-year warranty.
• Best for carrying in a gig bag → either, but for different reasons. LEKATO is a compact 6.3" x 4.3" x 3.52" amp; SonixForce is a small metal box with no speaker bulk.
• Best for bass, guitar or mandolin practice → LEKATO Mini Guitar Amplifier (though both list guitar and double bass as compatible devices).
In my opinion, this comes down to whether you need sound in the air or sound in your ears. If I play electric guitar, bass or mandolin and want a rechargeable amp I can actually hear — at home, outdoors, or while busking — I'd buy the LEKATO Mini Guitar Amplifier. Dual speakers, 5W, Clean/Overdrive modes, Bluetooth backing tracks and six hours of runtime cover the whole practice routine in one small box. I'd only steer toward the SonixForce Headphone Amplifier if my monitoring happens entirely through wired headphones or IEMs and I need XLR/TRS inputs, Stereo/Mono switching, a metal body and a one-year warranty. For portable headphone listening specifically, that's the one I'd pick. Whichever way you lean, check the current price on Amazon before deciding — the numbers move around.
FAQ
how to connect mobile headphones
how to connect c port headphones
Neither unit lists USB-C as a headphone output. The LEKATO's Type-C port is for charging the 2000mAh battery, not for audio, so USB-C headphones won't work there. For wired listening, use the 3.5mm jack on the LEKATO or the 3.5mm output on the SonixForce.
how to use external headphones on mac
Connect your Mac's audio output to the SonixForce's XLR or TRS input with the right cable or adapter, then plug your headphones into its 3.5mm output — the built-in amp drives them at a proper level. The LEKATO is the other direction: it plays through its speakers and lets you monitor yourself privately via its 3.5mm jack.
how to pack headphones
For travel, keep the SonixForce's metal body protected alongside your headphones and cables in a padded pocket, since it's the box doing the amplifying. The LEKATO is the bulkier item at about 6.3" x 4.3" x 3.52", so give it its own compartment and coil the Type-C cable separately so nothing pulls on the jacks.
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