JOYO AC-40S 40W Acoustic Guitar Amp with Stereo Speakers and Bluetooth

For an outdoor set or street performance, the JOYO AC-40S brings guitar and vocals together in one portable, battery-powered amplifier. Its 40W stereo output drives two 6.5-inch speakers, while separate guitar and microphone channels let you shape each source. Need to add backing tracks or record directly? Bluetooth, AUX IN and USB-C OTG give you practical ways to connect.

Product specs

• Type: Acoustic guitar amplifier
• Output: 40W stereo
• Speakers: Two 6.5-inch speakers
• Channels: Separate guitar and microphone channels
• Guitar controls: Three-band EQ, chorus, delay and reverb
• Microphone controls: Independent bass, treble and reverb
• Connections: Bluetooth 5.0, AUX IN, USB-C OTG and 3.5mm headphone jack
• Power: Rechargeable battery, up to 6 hours at moderate volume
• Dimensions: 28D x 42W x 20H centimetres
• Weight: 8.6 kg

The stereo design gives your acoustic sound a broader presentation than a mono setup, and the guitar channel’s bass, mid and treble controls help tailor the tone for strumming or fingerpicking. Add chorus, delay or reverb to taste, with effects that can be combined. For a singer-songwriter set, the second channel accommodates a standard dynamic microphone and has its own vocal reverb controls.

What it works with

The guitar channel is designed for acoustic-electric guitars and works with most modern active and passive pickups. Some low-output passive pickups may need an external preamp to boost their signal. The microphone input is optimized for standard dynamic microphones and does not supply phantom power, so it is not suitable for condenser microphones that require phantom power.

Bluetooth 5.0 lets you stream backing tracks wirelessly, while AUX IN offers a wired connection. These two playback inputs cannot be used at the same time. For recording, USB-C OTG connects directly to a phone or computer without an audio interface, it does not charge a connected phone. Plug in headphones for quiet practice, and the speakers mute automatically. The USB-C cable and USB-C-to-Lightning adapter are listed among the included items.

Tips for day-to-day use

Set the guitar’s three-band EQ first, then add only the effects that suit the song. For vocals outdoors, the independent bass and treble controls help adjust the microphone channel, and its reverb can add ambience. At home, Bluetooth playback makes the amp useful for listening as well as practice, for a performance, the battery-powered design lets you set up away from a power outlet. It can also be plugged in and used while charging, and its speaker-stand mount gives performers another placement option.

Buyers often highlight the sound and overall performance, with positive comments about battery life as well. Their impressions reflect individual use, while the documented playtime is up to 6 hours at moderate volume.

Questions before you buy

Can it amplify guitar and vocals at the same time? Yes. The AC-40S has separate guitar and microphone channels, each with its own tone controls, the microphone channel also has dedicated reverb.

Can I record to my phone or computer? USB-C OTG supports direct recording to a phone or computer without an audio interface. The USB-C connection does not charge a phone.

Can I use Bluetooth and AUX IN together? No. Choose either Bluetooth streaming or AUX IN for playback.

Final verdict

A solid pick if you want one battery-powered amp for acoustic-electric guitar, vocals and backing tracks at outdoor performances or small live sets. The 40W stereo output, dual speakers, built-in effects and direct USB-C recording make the AC-40S a flexible performance hub, with practical controls for shaping both guitar and voice.