Hello everyone this is my first post and if it is in the wrong place then mods please move it to where it needs to be.
First off, I have fooled with car audio and have a halfway understanding of it but I have never done any building from the ground up. I am wanting to build a boom box that is blue tooth capable and will be loud enough to be played outdoors and softball tournaments while our team is warning up. I want the sound to be pretty clean and have volume. Bass or mid actually is important for sound quality but I do not need this thing to shake the ground.
I would like to keep it to something say 2 feet long and a foot or so deep and a foot or so tall. Not huge but not tiny either. Also of course I am looking to do this as cheap as possible but I know quality can't be achieved dirt cheap. I need some ideas of components to look at. So basically I want someone to help me with a plan to design this and I will build it.
I emailed a place that sells components and ask basically these same questions but feel like I was up sold big time. The battery they had suggested for powering the unit was 300 bucks. I do need some play time self powered possible 6 hours or so and also would like it to have a power supply that I could plug in if electricity was available. Would also like it to charge apple products by USB.
Thanks in advance.
First off, I have fooled with car audio and have a halfway understanding of it but I have never done any building from the ground up. I am wanting to build a boom box that is blue tooth capable and will be loud enough to be played outdoors and softball tournaments while our team is warning up. I want the sound to be pretty clean and have volume. Bass or mid actually is important for sound quality but I do not need this thing to shake the ground.
I would like to keep it to something say 2 feet long and a foot or so deep and a foot or so tall. Not huge but not tiny either. Also of course I am looking to do this as cheap as possible but I know quality can't be achieved dirt cheap. I need some ideas of components to look at. So basically I want someone to help me with a plan to design this and I will build it.
I emailed a place that sells components and ask basically these same questions but feel like I was up sold big time. The battery they had suggested for powering the unit was 300 bucks. I do need some play time self powered possible 6 hours or so and also would like it to have a power supply that I could plug in if electricity was available. Would also like it to charge apple products by USB.
Thanks in advance.
There are at least 5 or 6 on this page: Parts Express Speaker Projects
Also, one of the members on the Parts Express Tech Talk forum built a very nice portable system called the Cougar: COÜGAR - Boombox
Mike
Also, one of the members on the Parts Express Tech Talk forum built a very nice portable system called the Cougar: COÜGAR - Boombox
Mike
With these external dimensions and a build out of 0.75" plywood, you can have up to ~ 40L internal volume.
Not a turnkey design, but if you are OK with a mono boombox and f3=70Hz, but pretty high SPL capability:
2x Eminence Beta 8A in 35L tuned to 70Hz. This would be a 2.5-way configuration. One Beta-8A will be low-passed at 375Hz to fill-in below baffle-step. The other will run to ~2kHz and meet a compression driver mounted on a constant-directivity waveguide, such as the JBL PT units or Dayton/Pyle clones. The compression driver could be almost anything that can play down to at least 2kHz, Eminence has some inexpensive candidates. It will basically be a single short tower speaker and will stand upright in a TMM configuration. Coverage should be even at ~90°, but the crossover has to be done right. A global high-pass at ~40Hz should not hurt response and will help protect the midbass drivers.
You'll need a 4ohm capable amp, but this will make for better midbass transients for lower voltage, as in car audio. Mono allows for a single 2ch amp to be bridged as well. This should be quite rugged and will play loud. Other designs could offer more bass, with the associated tradeoffs.
Not a turnkey design, but if you are OK with a mono boombox and f3=70Hz, but pretty high SPL capability:
2x Eminence Beta 8A in 35L tuned to 70Hz. This would be a 2.5-way configuration. One Beta-8A will be low-passed at 375Hz to fill-in below baffle-step. The other will run to ~2kHz and meet a compression driver mounted on a constant-directivity waveguide, such as the JBL PT units or Dayton/Pyle clones. The compression driver could be almost anything that can play down to at least 2kHz, Eminence has some inexpensive candidates. It will basically be a single short tower speaker and will stand upright in a TMM configuration. Coverage should be even at ~90°, but the crossover has to be done right. A global high-pass at ~40Hz should not hurt response and will help protect the midbass drivers.
You'll need a 4ohm capable amp, but this will make for better midbass transients for lower voltage, as in car audio. Mono allows for a single 2ch amp to be bridged as well. This should be quite rugged and will play loud. Other designs could offer more bass, with the associated tradeoffs.
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