Joyo AC-40S Black Combo for Acoustic-electric Guitar

Portable 40 W Stereo Acoustic Guitar Amplifier for Live Performance

The Joyo AC-40S is a battery-powered acoustic guitar amplifier built for performers who play outside the studio. Stereo 40 W output drives two 6.5" speakers, giving acoustic-electric guitars the air and clarity to compete with vocals in a live mix. Two independent channels — instrument and microphone — let a solo artist run a full performance through one cabinet. This model suits singer-songwriters, buskers, and coffee-shop performers who want a self-contained rig that travels light.

What Sets This Acoustic Amp Apart

Unlike most portable acoustic amps that compromise on channels or effects, the AC-40S pairs an XLR/jack combo mic input with a 6.3 mm instrument jack, each with independent EQ, volume, and DSP. Bluetooth 5.0 streams backing tracks, and a bottom-mounted pole socket lifts the cabinet for street performance. A USB-C OTG port sends the mix straight to a phone or computer for recording without an external interface.

Stereo Power and Speaker Configuration

Output power and speaker layout shape how an acoustic guitar sits in a mix. The AC-40S splits 40 W into two 20 W channels feeding a pair of 6.5" drivers.

• Power Output: 40 W (20 W + 20 W) stereo — headroom for small venues and outdoor gigs
• Speakers: 2 × 6.5" (165 mm) — dual-driver layout for stereo separation
• Speaker Stand Mount: Standard 35 mm pole socket — raises the cabinet for better projection

Independent Channels and Onboard DSP

Two channels mean guitar and voice can be shaped separately, the core idea behind an acoustic-specific amp. The guitar channel carries a 3-band EQ plus Chorus, Delay, and Reverb, while the mic channel adds its own Bass, Treble, and Reverb for vocal control.

• Channels: 2 (instrument + microphone) — run guitar and vocals without a mixer
• Guitar EQ: Bass / Middle / Treble — sculpt acoustic tone without external pedals
• Effects: Chorus, Delay, Reverb (guitar); Reverb (mic) — onboard DSP sweetens the signal

Inputs, Streaming, and Battery Operation

Modern acoustic players stream, record, and play unplugged. The AC-40S covers all three with Bluetooth, a 3.5 mm AUX input, a headphone output that mutes the speakers, and a USB-C OTG port for direct recording.

• Inputs: 6.3 mm jack (instrument), XLR/jack combo (mic), 3.5 mm AUX — covers acoustic-electric, dynamic mic, and external playback
• Bluetooth: 5.0 wireless streaming — pairs with phone or tablet for backing tracks
• Battery: 14.8 V / 4.4 Ah lithium, up to 6 hours at moderate volume — busking-ready without mains power

Built for Singer-Songwriters and Mobile Performers

The Joyo AC-40S is the right choice for solo acoustic performers who need one box for guitar, vocals, backing tracks, and recording. Buskers get a battery-powered rig with Bluetooth streaming and a pole-mount socket for street corners and markets. Singer-songwriters at coffee shops and open mics gain two channels of EQ and effects without carrying a separate mixer or pedalboard. Home players use the headphone output for silent late-night practice sessions.

JOYO Technology and the AC Series

JOYO Technology has been building music gear for two decades, expanding from guitar pedals into amplifiers, wireless systems, and audio interfaces. The AC-20S and the flagship 40 W model mark the brand's push into acoustic amplification, bringing the value-driven approach that made its R-Series pedals popular with working musicians.