Let’s be honest. We can’t put bottomward our phones continued abundant to bung them into a speaker. Bluetooth to the rescue! With a adulation of all things DIY, I congenital my own set and anticipation I’d allotment the acquaintance for anyone abroad attractive to do the same. The basal apparatus alone amount about $35, although amount depends on how you appetite the accomplished artefact to look.
Safety Note- I’m not an electrician or audiophile. I’m artlessly administration what I’ve managed to amount out. Be acute about alive on electronics. Amps can backpack a allegation alike afterwards the ability is angry off.
Needed Components: Bluetooth Module, Amp, 4 ohm abounding ambit speakers, 12V Ability supply, Arena Bend Isolator
Optional Components: Audio Taper Pot, DP-DT Switch, LED, 470 Ohm, 1/2 Watt Resistor
Tools: Wire clipper/strippers, soldering Iron, solder
Got your equipment? Awesome. Let’s begin! Review the angel beneath to see the basal arrangement, and again I’ll explain it.
Since both the amp and BT assemblage charge power, but we don’t appetite to use two abstracted ability wires, we will allotment one. Aback both units accept the aforementioned ability requirements, this involves artlessly acid the wire a the bung end. Note- Accumulate clue of which ancillary is which! Then, absorbed the cut ends to the screw-in terminals on the amp. Finally, bung in the BT module.
Now we charge to get the audio from the BT over to the amp. However, there’s a problem. Administration a ability antecedent like we aloof did creates a arena bend that will accomplish your speakers buzz! I bet you’re mad at me for authoritative you cut that ability wire now, huh? Afore you get too mad, there’s a bewitched accessory alleged a arena bend isolator that will fix the problem. It doesn’t amount which end faces which way, so go advanced and wire your GLI in amid the bluetooth assemblage and amp. Aback you try to do this, you will apparently accept a blend of altered male/female RCA, 3.5mm inputs, or alike bald affairs that somehow charge to connect. You could buy adapters, but the easiest affair to do is blow the ends off and adhesive the bald affairs together. All of these types of affairs accept a larboard channel, appropriate channel, and a arena wire which makes it actual accessible to affix them. Red goes to red, and white to white, arena to ground. Arena affairs are usually thicker and bare, or black. You ability charge to affix several area together. That’s ok! Aloof aberration them together, adhesive them, and blanket anniversary in electrical tape.
Next, grab your speakers. I acclimated some old car speakers I had sitting around. Aloof accomplish abiding they are abounding ambit (not tweeters or subs), and that they are 4-ohm. It will usually say on the aback how abounding ohms they are. Go advanced and attach affairs to the apostle terminals, and the spiral terminals on the board.
At this point, your basal electronics are done. You can bung in the power, affix a bluetooth accessory and try it out. If you acclimated the aforementioned amp I did, you’ll apprehension a loud *pop* aback it turns on. This is a ancillary aftereffect of actuality cheap! A bargain workaround is a DP-DT toggle about-face active in amid the speakers, and the amp. This will act as a aphasiac on so that you can delay a few abnormal for the amp to balance afore enabling the speakers.
Right now, the bluetooth bore is cutting full-volume into your amp. You can ascendancy the aggregate of whatever accessory you’re using, but it may still be a acceptable abstraction to add a aggregate knob. That way you can about-face bottomward the amp volume, and about-face up the device’s volume. This will accord you the aforementioned akin of audio, but with beneath apostle ‘hissing’. Consult the amp chiral for how to add a aggregate potentiometer.
Now that you accept a nice aural speaker, you apparently appetite it to attending a bit nicer than a assortment of wires. I won’t get into capacity actuality aback there are a actor admonition you can booty this in. I fabricated a simple ache box, corrective it black, and army a rustic allotment of cedar in the front. To accomplishment it off, I active the resistor listed aloft in advanced of the LED, and absorbed it into the ability terminals on the amp. This gives a nice ability indicator light.
You’re now the appreciative buyer of a bluetooth speaker! Here’s a quick video on how abundance angry out:
It’s been about a year aback I initially wrote this commodity and I’m blessed to abode that I still use these little speakers all the time in my shop. I ample I’d abode some accepted questions:
What’s the average amphitheater for? I had an added tweeter laying around, so I breach the larboard approach amid the beyond apostle and the little tweeter. I anticipate it helps accommodate hardly bigger sound.
Enclosure questions: I aloof fabricated a box with what I had on hand. There is a average affiliate that the speakers arise to. Again I ran screws through the average affiliate into the advanced console to accumulate it on. Finally, I alert little triangles in the aback corners for the aback console to spiral into. I would acclaim researching added than I did! Materials, and how closed your box is can affect things.
How did you add a aggregate knob? The amp I acclimated came with a base diagram for this which can be beheld as a .pdf here: http://www.parts-express.com/pedocs/manuals/320-600-parts-express-ta2024-manual.pdf
How about that ability switch? Aloof a approved toggle about-face in band with the ability wire. Be abiding to use one that is rated aerial enough.
What about the aphasiac switch? Another toggle, but this time it’s a bifold bandy about-face acceptation it has six terminals. (two sets of on-ground-off). This is active in amid the speakers and the amp outputs.
What’s the complete like? It gets affluence loud for its size, and I haven’t noticed any distortion. It’s not actual bass-heavy aback I didn’t use a sub speaker, and the box architecture wasn’t ideal.
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