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  • Portable Bluetooth Speaker With Built-In PowerBank

    I have been thinking about doing an Instructable myself but time and laziness usually get the best of me. I just try to add a little speaker building knowledge to the discussions because there is so much more to it than just building a box and I just want to express that, not to criticize the author. What level of speaker you build is dependent on your goals. I do build speakers as a hobby and they usually are relatively expensive and complex, but you don't have to spend a lot of money to make a respectable speaker. There are many free online resources to do the calculations for you so that you can make the most of what parts you are using and fairly decent drivers are available for a few dollars.

    For sure, there is a bass difference. Ported and passive radiator systems definitely make more bass, but they usually do so at the expense of quality. Probably doesn't matter in much a boom box, but if you try to build more traditional speakers meant to be accurate, it starts to matter more. Ported and passive radiator systems work on the same principle of resonating a passive driver or column of air at a certain frequency to enhance the bass, but there is some delay, which leads to sloppiness. The advantages of passive radiator systems is that there is no port noise and perhaps simpler to design since these is no port length and diameter to calculate. For some drivers the port length needed can be excessive, so only passive radiator or sealed is practical. I personally like to use a se...

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    For sure, there is a bass difference. Ported and passive radiator systems definitely make more bass, but they usually do so at the expense of quality. Probably doesn't matter in much a boom box, but if you try to build more traditional speakers meant to be accurate, it starts to matter more. Ported and passive radiator systems work on the same principle of resonating a passive driver or column of air at a certain frequency to enhance the bass, but there is some delay, which leads to sloppiness. The advantages of passive radiator systems is that there is no port noise and perhaps simpler to design since these is no port length and diameter to calculate. For some drivers the port length needed can be excessive, so only passive radiator or sealed is practical. I personally like to use a sealed enclosure for accuracy and a DSP or bass booster to compensate for the loss of bass.Each driver is designed for certain enclosure type (ported, sealed or even enclosure-less) and volume, so may not work well in the wrong enclosure. Many drivers that you buy are designed to work in either ported or sealed, but you still need to calculate the proper enclosure size for each, which can vary wildly between even similarly sized drivers. Anyway, I don't recommend using reclaimed drivers for serious speakers, unless you have the original enclosure and can replicate its dimensions or a spec sheet for the driver. Speaker design is quite a rabbit hole, but I love it.

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  • Portable Bluetooth Speaker With Built-In PowerBank

    Looks nice. I would like to mention that a passive radiator speaker is technically not a sealed speaker and is very similar to a ported system in terms of the mechanics. In fact, you should use the same size box as a ported system. With reclaimed speakers, it really is not really possible to calculate the correct size of the enclosure without ST parameters, unless you have the equipment to measure them.

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  • Reclaimed Bamboo Box Bluetooth Speaker

    You correct, but using junk...er reclaimed speakers makes getting the correct parameters difficult. These kinds of projects make me scratch my head because building speakers and with proper enclosures could make these so much more informative and sound better.

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  • Turn Any Pair of Earbuds Into Bluetooth Earbuds!

    I made a similar rig, but you have missed an important point. If you want the best sound, buy a receiver with "AptX" codex like this one: https://smile.amazon.com/TROND-Bluetooth-Receiver-... Your phone or source must also support AptX, but you will not get the best sound quality without it. Note: My understanding is that iPhones don't support AptX, but most Android phones do. Check your phone specs. (AptX info: https://www.cnet.com/news/can-aptx-give-you-better-sound-over-bluetooth/)Also, I got a self locking adhesive clip that I added. The one I got was made of steel, but they don't seem to make it anymore. It is similar to this, and won't come off your clothes without holding the unlock: https://smile.amazon.com/gp/product/B00HUV8FWW/ref=ox_sc_act_title_1?smid=ATVPDKIKX0...

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    I made a similar rig, but you have missed an important point. If you want the best sound, buy a receiver with "AptX" codex like this one: https://smile.amazon.com/TROND-Bluetooth-Receiver-... Your phone or source must also support AptX, but you will not get the best sound quality without it. Note: My understanding is that iPhones don't support AptX, but most Android phones do. Check your phone specs. (AptX info: https://www.cnet.com/news/can-aptx-give-you-better-sound-over-bluetooth/)Also, I got a self locking adhesive clip that I added. The one I got was made of steel, but they don't seem to make it anymore. It is similar to this, and won't come off your clothes without holding the unlock: https://smile.amazon.com/gp/product/B00HUV8FWW/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&psc=1

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  • gbferrell commented on evanandkatelyn's instructable DIY Cat Box Cabinet (IKEA Hack)9 months ago
    DIY Cat Box Cabinet (IKEA Hack)

    Cool idea! I caution that if you have multiple cats that only semi get along, with only one entrance/exit, that thing is a cat thunder dome :)

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  • gbferrell commented on MiiBooth's instructable Ocean Waves in a bottle (Video)1 year ago
    Ocean Waves in a bottle (Video)

    It is made of minerals, go figure.

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  • gbferrell commented on darbinorvar's instructable DIY Bluetooth Bookshelf Speaker1 year ago
    DIY Bluetooth Bookshelf Speaker

    Yes, I dislike seeing these speaker projects with no consideration for actual speaker building portion, which is the most important and interesting part. A car speaker probably won't have the parameters available to even create the correct enclosure, but are probably more forgiving in that regard. I guess I will have to create my own Instructable.

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