Hacking & recycling helped me save money! Try to do the same :D
SMALL SIZE, BIG SOUND
Despite AirJam's tiny size, it has the ability to surpass its competitor's performance. Thanks to the sandwiched speaker orientation, I was able to fit 4 Full-ranged speaker drivers in one tiny enclosure (2x7x2"). A "passive radiator" was added to extend the lower bass frequencies, thus resulting to a much punchier bass. Compared to its rivals, the AirJam has 4 active drivers and one passive radiator, offering deeper bass and wider mids.
CHANGE TRACKS WIRELESSLY (works with Siri!)
Thanks to Bluetooth 4.0, AirJam can receive Bluetooth transmissions up to 30 meters! Whether you are using your laptop, tablet or phone, you can easily switch tracks wirelessly. The handsfree feature works great with Speakerphone, Skype, FaceTime and also Siri!
HIGHLY PORTABLE + WORLD'S LOUDEST PORTABLE SPEAKER
Love to go outdoors? The lightweight 2x7x2" acrylic enclosure makes AirJam easy to carry and it fits in your pocket! It's also great for sharing music with your friends. Unlike any other portable BT speaker, AirJam's quad back-to-back speaker orientation delivers 360° of fullrange audio. It chooses no angles and it's loud enough to move an entire flat.
Based on our SPL meter readings, AirJam delivered 96dB of solid audio, making AirJam the loudest portable BT speaker of 2014. What's your basis? Boombotix claims that they have the loudest portable speaker, according to them, Boombot Rex maxed 94dB. This means AirJam is 2dB louder than today's loudest portable speaker.
That design looks familiar! Humm... Where did it come from?
The design came from one of Bose's greatest masterpiece. It's the Soundlink Mini's Do-It-Yourself version. I based it on my original Soundlink unit (my dad's Christmas gift). If you would ask me: what's the best compact Bluetooth speaker in market? It's definitely Bose's Soundlink Mini! The only downside is the price, tagged at $199, it's not the average speaker that an average man would buy. So I thought of making a DIY version!
If you remember reading my bio, you would recall that I love making DIY versions of existing HiFi products. The teardown is my favorite part since you get to learn engineer's secret on building their product's success. Luckily I didn't need to tear my Sounlink down since a lot of resources were cited online.
Specs & Features:
- Includes Handsfree Microphone (Speakerphone Function)
- Quad 3W Fullrange Speakers (4Ω - 35mm drivers)
- Quad 3W High Efficiency Amplifier (class AB)
- Li-Po Battery 1,300mAh (20hrs Playback)
- Command Buttons (Volume/Pause//Play)
- Tested dB (via SPL): 96dB @2ft
- 30m Bluetooth Range (v4.0)
- Single Passive Radiator
- 3.5mm Auxiliary Ready
Videos Comming Soon (after my condenser mic arrives):
- AirJam Professional Ad
- AirJam vs. Bose Soundlink Mini
- AirJam vs. Jawebone Jambox
- AirJam vs. JBL Charge & Flip
Like Our Facebook Page, Get more updates!High Efficiency Amplifier Test (Prototyping Stage)
Extreme Soundtest! That Will Blow You Away!
(Please wear HQ headphones. Hear the rich sound of the SUPERCHARGED speaker)
Step 1: Parts & Materials
- Bluetooth Speaker (for teardown) -- [1x $7.60]
- 35mm Speakers (3W - 4ohms) -- [4x $2.80]
- 1Cell LiPo Battery (3000mAh) -- [1x $8.70]
- Acrylic Board (0.4mm thick) -- [1x $5.00]
- 8002B Audio Amp I.C. (3W - 3Ω) -- [4x Recycled]
- 2.2uF Electrolytic Capacitor -- [4x local store]
- 10KΩ Resistor (1/4w) -- [4x local store]
- 33KΩ Resistor (1/4w) -- [4x local store]
Similar Alternatives (Read The Guide First):
- Bluetooth Speaker (for teardown) -- [1x $12.60]
- Efficient 3W+3W Stereo Amplifier -- [2x $2.90]
- LiPo Battery Charging Module -- [1x $10.50]
Tools & Equipment:
- Rotary Tool (ex. Dremel)
- Leatherman Multitool
- Portable Drill
- Metal File
Step 2: The Acrylic Stencil Printout
Step 3: Sanding & Filing the Edges
Be careful, if you cut too much acrylic, you will have to repeat the whole process!
Step 4: Cutting the Speaker's Holes (The Hard Part)
1st.) Again, use your highlighter pen to trace out your speaker's edges
2nd.) Attach your grinding tip for your rotary tool then cut off the excess acrylic.
3rd.) Get your sanding drum tip then sand off the remaining pink marks.
4th.) Finally, bevel the edges. This helps spread the higher audio frequencies given off by the speakers.
Step 5: Mounting Your Speakers & Radiator
Step 6: Sandwich the Speakers
Step 7: Melting Acrylic - for Side Panels
Step 8: Recycling Bluetooth Modules - Teardown
Ordering a Cheap Bluetooth Module:
- Price range is around: $8 -22
- You only get the BT module itself
Ordering a Cheap Bluetooth Speaker:
- Microphone (Handsfree Function)
- Price range is around: $7-12
- 3W Speaker (35mm)
- Command Buttons
- 3W Amplifier Chip
- 3.7v Li-ion Battery
- Bluetooth Module
Step 9: Bluetooth Module - Hack & Mod
If you end up finding a different BT module, research its model and track down the L & R audio pins.
I researched My Module's Parts:
- Speaker: 3W Neodymium (35mm - 4ohms)
- Lithium Charger Chip: UN8HX
- BT Model: BLK-MD-SPK-D
- 3W Amplifier Chip: 8002B
Step 10: Wiring Instructions
Step 11: Button, Aux & Switch Extension
Step 12: Mounting the Battery + Battery Upgrade
The BT module came with a Lithium charging circuit. Don't worry it still works with the larger LiPo battery. The charger's auto cut-off is based on the battery's voltage and not on the current. So in terms of compatibility, the charger would still work with the LiPo, but in a much slower way.
Speaker's Tested Battery Life:
- Bedroom Listening (low = 20 hours)
- Living Room (medium = 12 hours)
- Party Outdoors (max = 6 hours)
Step 13: Mount the Bluetooth Module
Step 14: Fabricating the Amplifier
If your a Bluetooth speaker addict and has salvaged more than three BT speakers, then chances are you have four 8002B chips waiting for you to recycle. If you've managed to find four of those chips then, you could start making the PCB. I provided a downloadable PCB layout with fixed dimensions. The schematic will explain the part's value.
Convert SMD Chips To DIP:Read My Guide
My Full PCB Tutorial: DIY Customized Circuit Board
Mono Amplifier DEMO - Breadboard Prototype
Step 15: Installing the Amplifier
Step 16: Soldering the Speakers (Must Read)
Step 17: Sealing the Lower Panel
Step 18: Grinding the Edges & Sanding the Surface
Step 19: Paint-Job Time!
My Steps (You Could Do Your Own Steps):
1st.) Stuff your Auxiliary Jack, Mic and Switch with tissue paper.
2nd.) Cover the front baffle panel with masking tape.
3rd.) Paint the side panels with a can of "Matt Black Spray Paint"
4th.) Cover the side panels with masking tape.
5th.) Paint the side panels with a can of "Glossy Yellow Spray Paint"
6th.) Let it dry under the sunlight for 2 hours.
7th.) Unmask the tape.
Step 20: Customize!
Suggestions (give me more guys!):
- Use Sugru to make AirJam's rubbery legs, it reduces vibrations. (The future needs fixing!)
- If you have an iPhone, play with Siri! AirJam talks back to you! :D
- Replace the dustcaps with parabolic platics (makes it look better)
- Try to find a cheap AirPlay module (loss-less wireless audio)
Hey guys! I'm glad to inform you that we are building 3 more Bluetooth speakers this year! If you guys like it, your single vote would mean a lot to me! Thanks for visiting! Enjoy your AirJam!