Vendor: DiamondBoxx

XL3 600 Watts RMS 6x5.5 inch woofers dual titanium dome tweeters

SKU: Model_XL3_300
Regular price $ 1,699.00 Sale price $ 1,699.00 Regular price $ 1,999.00
Sale 15.01% $ 300.00 (15.01%)
Aluminum Color Black Anodized
Battery Size 300Wh
In stock: 13

The last wireless Bluetooth speaker you will ever need to buy.  Built to last and built to blast.  In America.  Real Bass.  Real Amplifiers.  Real Speakers.  

Wireless True Stereo Sound, with adjustable stereo width control.  Six electrically and mechanically hand-matched 5.5" woofers and a 4" bass port for bass you can feel as well as hear.  122dB loud.  Huge 300Wh lightweight Lithium battery.  Anywhere, anytime, no electricity needed.

Built-in 600 Watt RMS (1000W Max) Class A/B 10 channel high fidelity amplifier in a tri-amped or bi-amped arrangement (mode dependent) with 2-way or 3-way active crossovers and analog signal processing for the best sound possible in the lightest package with the longest battery life, and ZERO LATENCY inputs for video use. 

With its massive aluminum front panel serving as the amplifier's heatsink, it is made to play FULL BLAST all day on a hot day without skipping a beat. 

The Specifications 

Size- 28 x 19 x 12 inches 

Bluetooth- Bluetooth 5.1 aptX HD, TWS 

Woofers- 6 x 5.5 inch Aluminum Cone 

Tweeters- 4 x 1 inch Titanium Dome 

Amplifier Power- 600 Watts RMS , Max 1000W 

Frequency Response- 35Hz - 22kHz  @+/ -3dB 

Weight- 45 lbs. 

Playtime on single charge (300Wh battery)  5-26 hours

Playtime on single charge (462Wh battery)  7.5-40 hours

Playtime on single charge (600Wh battery)  10-52 hours

Battery Life- Over 1000 recharge cycles (all sizes)

0% - 100% charge time with 7A charger (300Wh battery) 4 hours

0% - 100% charge time with 7A charger (462Wh battery) 6 hours

0% - 100% charge time with 7A charger (600Wh battery) 8 hours

The XL3 can play music while charging.  

Max Voltage- 16.8V  


XL3 Stereo Expander Operational Description 


The King of all Bluetooth Boombox, the Model XL3.  But don't take our word for it, check out this review video by Flossy Carter. 


Included Items 

DiamondBoxx Model XL3 

7A Lithium-Ion Battery Charger 

3.5 mm stereo audio cable 

User manual 

Proudly Made in USA   


Please note that ALL new Model XL3 will have Bluetooth 5.x and will not connect via True Wireless Stereo (TWS) with older versions of the XL2 or other first or second generation DiamondBoxx products.  They can still be linked via cable.  


XL3 Owner's manual 

Free Shipping in Cont. US
Made Eco Friendly
Loud Clear Undistorted
Full Spectrum Stereo Sound


Customer Reviews

Based on 15 reviews
gregory hill
Great Speaker

This speaker is great good bass all round good quality sound

larry benjamin

Just awesome!

larry williamson

Great product

Andrew Brigham
Blew me away instantly

Diamondboxx is no contest when it comes to high end sound quality and performance. Just got my xl3 and wow the sound is unbelievable to be honest. You need to experience it first hand. I previously have the M3 and two of the pa15’s those are also great. But this xl3 has such deep bass and goes loud I need to get another one to pair them up. It sounds better than my high end setup and that it’s portable makes it the only choice for music inside and outside hands down. There is no other company that can even compete in this category. Clear crisp loud deep bass no distortion at any volume. Ive been a supporter since 2019 from Canada and if you keep making them I’ll keep buying them.

Andrew Brigham

Ian Bro
This speaker will change your life.

I am a huge fan of portable. Music rolls with me everywhere I go. Smaller speakers check the box for many of my needs, but I have been looking for an audio solution for inside my large, open floor plan home and large outdoor living areas. I am not the kind of guy that sits in only one place for my music enjoyment. A traditional home audio system is not for me. All of the other large bluetooth speakers I have tried wash out and lack true definition in the minds and highs. The XL3 covers the mid and highs in ways that remind me of my dad’s McIntosh tube amp system. There is so much warm definition in these speakers!! The ability to to fine tune the mids and highs is exactly what I have been looking for. AND these things LOVE to to be CRANKED UP. There is no doubt. This is the only speaker that I have ever found that will make you feel like you are at a live concert venue. It’s truly superlative. I have the sub 8.2 on order and can’t wait to get it.