BYD Custom Stereo - Part 3 - Building Sub Box 

Too right

It was a bit rough to cut on, that's true.

Yeah, it goes alright

Well I wouldn't call it pioneering anything, or really guts/brains. Lots of people used to do this shit. We used to do maths in our heads too :)

Wood working is definitely not my thing

@@TallPaulTechI made a pair of frames for some 1x2m mirrors I scored from a customer… I must agree, wood working is not my thing either 🤣

Well simply put, I'm old!

Well I think so too!

Oh, be careful... don't let the boot lickers who don't dare deviate from anything that a factory produced hear you say that

@@TallPaulTech phuc em mate :)

Yep, no kidney stones in my car

Hmm or was it Leftfield

Haha... ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-iRv7IE6T4gQ.html

A bass reflex system (also known as a ported, vented box or reflex port) is a type of loudspeaker enclosure that uses a port (hole) or vent cut into the cabinet and a section of tubing or pipe affixed to the port.[1][2] This port enables the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies as compared to a typical sealed- or closed-box loudspeaker or an infinite baffle mounting.

Sealed sounds better. Just need more power to offset the efficiency loss.

@@ad_fletch A ported cab will typically be louder and lower than it's sealed counterpart, but more boomy. A sealed cab will be tighter sounding, at the expense of efficiency and low end extension. You need to throw the power to sealed boxes, while a ported box will do more with less power, generally speaking.

@@WelshLad. ported Box will end up way much bigger

Come on kids, get with it. No need to separate them, as it's a mono signal going to both speakers.

@@TallPaulTech not about the stereo separation, it’s about the performance of the speaker, volume of the air per driver etc. the volume given in the specs shouldn’t just be added together to make one big box. Should be one box per speaker of the given volume. Also, go round the edges with silicon bathroom sealant for air tightness. I’ve made several of these, and I’m absolutely not saying I’m an expert, I just know what improved after each iteration. I made some speakers out of cardboard printer paper boxes and old car stereo speakers, they were shit at first but by the time I’d tweaked the dimensions and sealed them they sounded quite respectable, loud enough to compete with the noisy machinery in the computer room I made them in anyway.

​​@@sprint955st i wouldnt separate the volume between the subs either, don't see any benefit when feeding them from a monoblock. The differences and tolerances from driver to driver are minimal and not worth it. Add brackets to stiffening up the box (cross to combine the top - bottom and the two larger sides) - definitely, also seal the box. But please don't use bathroom silicone, the fumes are very aggressiv and will destroy spider, membrane especially the surround. Use acrylic silicone and foam window / door sealing tape for thr chassis. Also keep in mind wood glue does already a very good job. He also missed the calculation on the volume quiet a lot, but dosent care about it. I thought this would be an proper install worth the money of the equipment, i love to see when he measure / calibrate the whole system and set up the DSP time alignment, crossover frequencies and EQ

Think about it...

@@TallPaulTechBouncy luggage 🤣

Huge mistake when calculating the volume!. You did it with outside dimensions on two sides, using 16 Millimeter MDF will end up with 27.77 Liters internal. Way to small for two chassis and lose a lot of deep bass compatibilities. You also did not include the displacement for the chassis itself (1.57 Liter), check the Box from Hertz Audio, its actually 20 Liters internal volume. 17 Liter netto is the absolute minimum, i would not build that because of QTC 0.85 Target on a closed box is QTC 0.707 Thats 31 Liters with this driver, i guess 25 Liters is fine (QTC 0.75) with Sonofill. Times two is 50 Liters plus 2x dirver displacement will end up 53 Liter intern. Volume. Would end up probably as a fiberglass box in this place, not as a square

...and yet it's still loud, bassy, and prevents kidney stones from forming.

Smaller sealed box often sounded better in a car. Just less efficient, but with the modern class D amplifier with kw of power it does not matter anymore@@markusmathis1811

Hear what you're saying, but if I came across a Model 3 with an install like this I'd actually be more likely to buy it over a stock one.

Really depends man, look at the ute market, there’s plenty of demand for pre-modded cars. And considering all his changes are posted as a video it at least give a buyer confidence on what was done.