Executive Stereo Audio Bluetooth Speaker

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Introduction: Executive Stereo Audio Bluetooth Speaker

About: I did my Masters and Bachelors in computer science. I have been tinkering with Computers & Electronics at a very young age. I am always fascinated by the technology and I try to explore how to integrate both...

This Instructable is written on how to make an "Executive Stereo Audio Bluetooth speaker". It is great for any Desk, Bedroom, Kitchen or a backyard where space is at premium. The Bluetooth speaker enclosure is made with Kitchen drawer organizer (Bamboo material).

Materials required:

  1. Kitchen drawer organizer (Bamboo material - Container store) for enclosure

    https://www.containerstore.com/s/kitchen/kitchen-d...

  2. 4 x 5W speakers @ 8 ohms (Connected in Parallel - from Banggood)
  3. 1 x Passive Radiator (eBay)
  4. Stereo Amplifier Board with Bluetooth (2 x 6W)
  5. Power switch
  6. D.C jack
  7. 5V 2A Power adapter for powering speaker
  8. Polyfill
  9. Connecting wires
  10. 1/4 inch MDF wood for covering the enclosure
  11. Speaker cloth - Hobby lobby get a black cloth with a slight stretch
  12. 1000uf 16V Capacitor add to DC In.
  13. JST connectors for speakers and power supply
  14. Red ribbon tape for a touch of look

Tools required for the job:

  1. Forstner bit to drill 2 inch holes for speaker
  2. Jig saw & blade to cut for passive radiator
  3. Wood cutter
  4. Glue gun
  5. Scissors
  6. Wire stripper
  7. Drill press or Cordless screw driver
  8. Sander
  9. Wood files

Step 1: Cut the Wood

Cut the MDF wood according to the Inner markings of the enclosure so that it fits and is little loose so we can add speaker cloth in the end.

Step 2: Run Wood Glue on the Corners

Run the wood glue on all 4 sides to seal the enclosure from any leaks. Let it dry overnight.

Step 3: Start Your Markings

Start markings by Aligning speakers and Passive radiator as shown.

Step 4: Cut Holes for Speaker and Passive Radiator

Using Forstner Bit, make holes for Speaker and Passive Radiator.

Step 5: Which Amplifier ???

There are many Bluetooth amplifiers in the market, Just choose for your application and needs. I am using 2 x 6W @ 4 Ohm Amplifier for this speaker which is enough for a small desktop speaker.

https://www.banggood.com/SANWU-HF69B-6W6W-Dual-Cha...


Step 6: Test Your Amplifier Before Assembling

Perform a Test or a Dry run of your Amplifier and Speakers connected before Assembling. On this Particular board there was an issue with Li-Ion Charger, so I had to stop using that. So, it becomes mandatory you test all functions - Bluetooth reception and range, Li-Ion charging, Amplifier, distortion, Power needs (Like this Amp needs > 1 Amp current), I am using a 5V 2A Power adapter. This should be a on your checklist of to do things.

This Amplifier used JST type connectors. So, please be aware of that.

Step 7: Start Assembling Speakers

With wood files, please carve so Passive radiator fits snug and there is no leak of Air. Seal it with wood glue from the back. Also seal the Speakers as shown using Glue gun. Also wire the speakers in Parallel (2 x 8 ohm speakers in parallel will reduce down to 4 ohms).

Step 8: Add Polyfill and Hot Glue

Add Poly-fill type material as a backing to the enclosure and hot glue it.

Step 9: Drill 2 Holes to Mount Power Adapter and Switch

Drill 2 holes on the bottom of the enclosure to mount power adapter and switch. The Positive terminal of the D.C Jack goes to switch and from switch to the main Power input on the Amplifier board. I added a 470uF Nichicon Fine Gold capacitor at the Power supply input for filtering. You can use a range upto 1000uF 16V.

Step 10: Prepare Speaker Cloth to Cover the Top.

Cut and Prepare the Speaker Cloth to cover the Top of the speaker board. Fold the cloth and hot glue it to the back of the board.

Step 11: Connect the Speakers to the Amplifier Board

First Secure the Amplifier board by hot gluing to the Enclosure back and Wire the speakers as shown.

Step 12: Final Look ...

Test and Glue all 4 sides and keep it clamped down overnight. Added thin ribbon line for looks. No need to add any stain etc. It looks great like in Natural wood. Great for any desk.

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    14 Discussions

    Great Project. Do you have a wiring drawing? The capacitor connection its not clear to me. Thanks

    1 reply

    The Power filter capacitor is connected to Power Supply (+) Positive and GND ( -| ) input terminals. Please don't get this board from Banggood, this Bluetooth board has some issues. But you can buy other Bluetooth module and PAM8403 amplifier board separately and connect it.

    Problem: The Bluetooth turns off when volume is high and connects back on. I have this problem with Power supply = 2Amps and also Li-Ion battery which puts out 5V.

    Love the design and components. From a 1-10 (10 being best), how would you rate the quality of sound from the speakers?

    1 reply

    Based on Cost/Performance I would rate it 8/10. The total cost for the Project was approx $35.

    Awesome work. Done carefully and professionally.

    0
    user
    Audigi

    8 months ago

    Thank You All. Appreciate the Comments and Votes.

    Genuine work

    Great stuff...

    Thank You Neena. Appreciate it.

    I think that may be the smartest looking speaker on this site, very nice job.

    1 reply

    Thank You Appreciate it.