Відео

Exhaust pipe

Looks like klipsh la scala😅

Love workinng with Dakie on the livestream ;) Doing some active crossover wiring while watching!

So, I was a my first Bass show (idk what they're called). A guy had a box that he said was switchable from 2,4 and 6th order box with PVC pipe and some ball valves. The ball valves let him switch between them. How does one design something like that?

Of course 6th Order better because have port flow the air, 4th Order less energy & less deep bass than 6th Order

Brother Please reply 4th order bandpass versus 6th order bandpass Which is better? I want smooth and panchi bass

I have an idea but i ask myself if it would work... Would it be possible to use smaller tesla valves in front loaded horn subs for air exchange and cooling of the speaker and chamber?

People looking for a home stereo subwoofer would do well to build a "dual subwoofer" like they would for a car, but plan ahead so you can wire the two subs to create 8 ohms. To be honest, I think driving passive subwoofers sound better than the powered subwoofers. More "musical" in nature. And you'll save yourself some money, or get a better sub for the same price.

Good video. DD makes some serious subwoofers.

I believe the ported box is best u can tune the box sealed its set finito finished .

I think with Vas it's more equivalent to a rigid plunger the same surface area as the Sd of the driver - the projected area of the cone perpendicular to its in and out motion. Atmospheric pressure air usually needs about 0.01 bar of this pressure per % compression for small close to linear compressions. The Vas (if measured at sea level) is dependent only on suspension compliance Cms and area Sd. Cms is the number of millimetres a cone will move off centre with a Newton of force on it.

You inverse your sub when the enclose is too small because you remove the magnet and basket out of the box 📦 makes the box larger I prefer inverted subs I am testing out my dbs both way problem is I maxed out my meter at 130 so idk 🤷

I have 4 🔊🔊🔊🔊American bass xd15s in two slotted box’s stacked directly behind driver seat on my 2 door jimmy

This explains why I had a 1985 Cadillac Fleetwood and everything was electric including the trunk lid. I installed 2 subs in a sealed enclosure in the trunk. Bad thing was when I shut the trunk it killed ALL the low frequency. But unlock the trunk and the bass would explode.... So for a little while there I had to ride around with the lid open and take railroad tracks slowly to keep the lid from flying up in the air 😂😂.... {The things I'd go through just to hear that bass... I'm older now and don't really care anymore 😂}

Wow thats why the jukeboxes always sound good speakers built-in 🔊 🙄 ❤😂

I’ve seen dual 18” 6th order pro audio subs that contain 2 drivers facing each other in a sort of “loading wall” like you show here. Basically, there’s a port on each side, then this big open almost horn-like mouth in the middle. (It slightly tapers out, but I wouldn’t consider it a horn.) That design has the most SPL of any subwoofer I’ve heard.

Starting my journey into audio. What kind of classes would I look at to begin learning this stuff? Open to books worth reading but I have a hard time doing strictly online learning. I do better in person. Audio engineering is such a broad term. Is there anywhere to take courses to learn this?

The trick to getting good sound quality is the Way the speaker is Designed ✨️

They Both Good Sealed and Ported Jukeboxes are sealed and been around a long time 😂

Specific speakers for sealed they are mostly full Range speaker's specifically designed for sealed enclosed speakers

So, I should add a fourth JL 12w7 to my Camry, instead of putting the 3 JL 13.5W7s in my Camry. Thanks for the update.

If you have a High power speaker usually have large Bass port lower the power less the bass port

Now for fun redo the calculation for a one inch tweeter 10KHz @ 100dB: xmax = 0.02 mm, gives 8000g !

I'd like to see a test a 15 inch Sub in a sealed box with like a 18 inch Passive Radiator. Or two 10 inch subs and a 15 inch Passive radiator.

καλησπέρα σας να σας κάνω μία ερώτηση αν το μεγάφωνο των τοποθετούσατε ανάποδα ο μαγνήτης έξω από την κούτα είναι σωστό ή λάθος ....ευχαριστώ πολύ εκ των προτέρων

I'll pay you to design my speaker box, you down?

All I can say is well put man Damn, you really know your stuff. Thank you. I learned a lot from this video.👍

So use speaker with neodymium cars is really bad idea, it will easily get very hot in a car

The Tesla Valve Tesla’s valvular conduit is mostly misunderstood as presented in much of literature and most media such as UA-cam in recent years. This device cannot be called a valve if used as an inline flow resistor. It is usually but erroneously demonstrated as a ‘one way valve’ with fluid, be it gas or liquid where the pressure drop is considerably larger in one direction flow than in the opposite. To use electrical analogy, this is not a diode but a resistor, therefore, the word valve is inappropriate. The expected ‘valve’ action (check or non-return valve) is unimpressive if anything. Tesla originally construed his ‘valvular conduit for gas flow, and in fact specifically for gas under pulsating pressure. In this application, it may be called a ‘valve’ or a ‘fluid diode’. Gas under hight frequency pulsating pressure takes advantage of this clever topology and is free to flow in one direction with relatively negligible losses and practically no backflow. With careful design, Tesla’s valvular conduit is a true pulsating gas diode with no moving parts. An illustrative application would be an IC engine exhaust manifold. It should also be noted that this valve will have optimal performance at a single design point, i.e., temperature, fluid type, volumetric flow and frequency, so that any change of a parameter will have it operating off optimum. As for making a modern design, I imagine a cut and try method with FEA would be used. Otherwise, well done, interesting and informative video, thank you very much.

interesting! thanks for sharing your reseach. The atari music is an annoying disdtraction though!

For me Xmax mostly depends on max THD. When you take a neo magnet and Ho frame with 3mm pole, you'll get a 1.5mm Xmax. Period. Otherwise this would be a tr.. driver. So, this layout is good for a highly efficient compression driver only. PS ...and for a car "audio" of course. Then you can mound this driver on a suspension and get 2 in 1: a dancing car and a loud "boooo"

Found this video while trying to tune the port on my 2x10 Ampeg (copy) bass cabinet, 50L. Did the math, it sounds spot on. Thanks!

Don't show your schematics too

Make sure you patent any ideas you design. You should design a new type of car amplifier like the Brazilian. Design new types of transformers as well.. you have 2 hears..starting now.

Counselor, you are mansplaining, lol,..just kidding

Nice video! Let me ask some question. How do you know how much XMax is in a driver under TS parameters measurement, let’s say with ARTA software. Of course that you cannot take the driver apart in order to have a look on the voice coil and measure it.! Is there any method you can point out? Or maybe same estimation? How does this value affect the TS parameters result I the measurement? Thank you!

Does the "ten tens" woofer play now, or is the Projekt on ice?😢

How can i contact u i desperately need help regarding a project

Knowledge is priceless good to see you

Good to see you back - electrical engineering is tough. Wish I had the time to devote.. i was going to ask you for design help but it seems your time is accounted for like mine lol.

Dakie!! Happy to see you blessing the UA-cams again 🥳

Your my help me please provide schematics real time spectrum analyzer audio 20hz to 20khz total 31 band

Ambitious project. But it's not an elegant design. Car amp has a DC to DC boost converter in it already. You're going from 240V ac to 12V DC to +-120V DC. It makes sense to modify the amp and eliminate a step in your design. Going from 240V ac to +-120V DC would achieve the power goal with A lot less current

Good to hear from you! Hope you finish the PSU soon, would love to see the results

Its good to see more of the Dak.

See you in 2 and a half years. Just make the power supply from yellow cake uranium and pig iron

you got the qts part wrong. the lower the qts 4 and lower is better for 4th orders 4.5 and up is better for 6th orders. the lower the qts (4.4 and lower) means it responds well in sealed. the higher the qts (4.6 and up) better response in ported boxes.

I think a sealed enclosure is best I find ports make speakers too boomy

Strength per dollar is an interesting unit of measurement

Anyone know if the woofer diameter matters? I have different online calculators saying one 4" port should be from 3.8" to over 100 inches to get 25hz in 8 cubic feet. They cannot all be correct. None ask about the driver itself. Is a 10" sub going to have the same response as an 18?