Coolmusic BP40D Powered Acoustic Guitar Amplifier Review

For acoustic guitarists, singer-songwriters, and street performers, finding an amplifier that combines portability, power, and professional effects can be a challenge. The Coolmusic BP40D Powered Acoustic Guitar Amplifier is designed exactly for that need.

With 80 watts of power, a built-in rechargeable battery, and Bluetooth connectivity, the BP40D doubles as both a performance-ready acoustic amp and a portable PA system. Add in 6 inputs, 3-band EQ, and built-in effects (reverb, chorus, delay), and you’ve got a feature-rich amplifier perfect for busking, small gigs, practice, or even casual backyard parties.

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Key Features & Technical Specifications

Feature	Details
Power Output	80 Watts
Speaker Size	Custom 8-inch driver
Connectivity	Bluetooth, Aux, Mic Input, Instrument Inputs
Inputs	6 total (guitar, mic, aux, Bluetooth, etc.)
Built-in Effects	Reverb, Chorus, Delay
Equalizer	3-Band EQ (Bass, Mid, Treble)
Battery	Rechargeable, up to 6–8 hours playtime
Weight	Lightweight, portable design
Color	Blue finish

Coolmusic BP40D Powered Acoustic Guitar Amplifier- Portable Bluetooth…

【6 Inputs】4 musical instrument inputs and 2 auxiliary inputs, which can fully satisfy a small band. It can connect 2 instruments (guitar, piano, keyboard, etc.), 2 microphones, two mobile phones or computers at the same time. Two independent EQ effects adjustment , Boost or attenuate the low-frequency, mid-frequency and high-frequency DB values.

Design & Build Quality

The Coolmusic BP40D strikes a balance between rugged durability and portability. Its compact cabinet design with a stylish blue finish makes it stand out on stage or at practice sessions. Despite its lightweight build, it feels sturdy enough to handle the road, with a solid grille protecting the speaker.

The ergonomic handle makes carrying it around effortless, whether you’re heading to a rehearsal, outdoor jam session, or gig.

Setup & Connectivity: Maximum Versatility

What makes the BP40D stand out is its multiple input options, making it suitable for solo performers, duos, or even small group performances.

Guitar Input – Plug in your acoustic-electric guitar and shape your tone with EQ and effects.
Microphone Input – Ideal for singer-songwriters who need vocals + guitar amplification.
Aux Input – Play backing tracks or connect external devices.
Bluetooth – Stream music wirelessly from your phone or tablet.
6 Inputs Total – Enough flexibility for jamming with multiple instruments or running it as a small PA system.

Performance: Big Sound in a Small Package

With 80 watts of power, the BP40D is loud enough for small venues, cafes, and outdoor performances.

Acoustic Guitar Tone

The 3-band EQ allows you to shape your sound precisely, cutting out harsh mids or boosting warmth in the lows. The built-in reverb, chorus, and delay effects give your acoustic guitar a studio-like depth that’s perfect for live performance.

Vocals & Microphone Performance

Plugging in a microphone transforms this into a mini PA system. Singers will appreciate the clear midrange and presence boost, while the effects can add atmosphere to live vocals.

Bluetooth Music Playback

As a Bluetooth speaker, the BP40D doubles as a portable party system. Whether you’re playing backing tracks during gigs or simply enjoying music outdoors, the sound is balanced, punchy, and full.

Battery Life & Portability

A major selling point is the rechargeable battery, offering up to 6–8 hours of continuous use. This makes it perfect for:

Buskers performing on the street
Backyard jam sessions without needing power outlets
Traveling musicians who want freedom from cables

Charge it overnight, and you’ll have a full day of performance power.

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Pros & Cons

✅ Pros

Powerful 80W output in a portable size
Built-in effects (reverb, chorus, delay) for professional tone shaping
6 inputs for maximum flexibility (guitar, mic, aux, Bluetooth, etc.)
Rechargeable battery with long playtime
Lightweight, portable design with ergonomic handle
Doubles as a Bluetooth speaker/mini PA system

❌ Cons

Not powerful enough for very large venues without PA support
Lacks advanced digital modeling found in higher-end amps
Blue color may not appeal to everyone’s aesthetic preference

Who Should Buy the Coolmusic BP40D?

Singer-Songwriters – Perfect for performing with guitar + vocals in cafes or small gigs.
Buskers & Street Performers – Battery-powered portability makes it busking-ready.
Casual Musicians – Great practice amp that doubles as a Bluetooth speaker.
Small Event Hosts – Works as a mini PA system for speeches or outdoor gatherings.

Competitor Comparisons

Coolmusic BP40D vs Roland Cube Street EX

Roland offers more brand recognition and slightly longer battery life, but at a higher price.
Coolmusic BP40D delivers similar performance with added Bluetooth streaming at a more affordable cost.

Coolmusic BP40D vs Fender Acoustic Junior

Fender offers classic styling and strong tone shaping.
Coolmusic is more budget-friendly with additional inputs and Bluetooth.

Coolmusic BP40D vs Boss Acoustic Singer Live LT

Boss provides premium effects and vocal harmonies.
Coolmusic is a simpler, portable solution that covers the basics well.

Customer Reviews & Feedback

Musicians consistently praise the BP40D for:

Portability & long battery life
Rich effects that elevate live acoustic performance
Affordability compared to Roland and Fender amps

Some noted that while it’s excellent for small gigs and practice, it isn’t designed for large stage use without PA support.

FAQs

Q: How long does the battery last?
Up to 6–8 hours depending on volume and usage.

Q: Can it handle electric guitars?
Yes, though it’s voiced for acoustics — electric guitars may lack drive without pedals.

Q: Is it loud enough for band practice?
Yes, for acoustic or small ensembles. For rock bands or large gigs, you’ll need additional amplification.

Q: Can I connect it to an external speaker?
No, it’s designed as a self-contained portable system.

Q: Is the Bluetooth reliable for live backing tracks?
Yes, it’s stable, though wired aux input is always recommended for live reliability.

Final Verdict

The Coolmusic BP40D Powered Acoustic Guitar Amplifier is one of the most versatile portable amps in 2025. It’s powerful enough for small gigs, light enough for busking, and packed with features like Bluetooth streaming, built-in effects, and multiple inputs.

For acoustic players and singer-songwriters who want an all-in-one solution that works as both a guitar amp and a mini PA, the BP40D is a fantastic choice — especially at its price point.