Is it because the plastic box covering the amplifier is flexing like the speaker in a passive radiator kinda way.. Silicon a piece of MDF over the back of the plastic box to stop flexing.. Cheers 👍
What i always do to seal up leaks is put tape or little balls of paper towels. In this case id put tape on the exterior of the phase switch. Its no big deal for me at least maybe because im ghetto 😂
In my experience of using plate amplifiers. Some leak & some don't and for that I don't trust any of them! So I do exactly what Dayton Audio said. Completely separate the subwoofer from the plate amp. When I make these small enclosures I'm usually using. A subwoofer & 2 passive radiators & it has to be air tight for proper tuning. So avoid the folly & just believe that they all leak. Then design around that information & the success rate will increase. 👍🏾
The back of the amplifier is removable by unscrewing the screws on outside of amp. It’s sealed with a felt gasket like material. Check to see if screws are tight or try adding a better gasket.
hei.. felicitari pentru toata munca depusa si mare multumita pentru infirmatii! te-ai gandit sa construiesti un sistem surround, poate atmos? un 2021 plin de succes!
I've never heard of such things. Even if you make a perfectly air tight sealed box, the speaker itself has some amount of leakage (very low), but in time, I'm sure it solves the pressure equalization you mention. Obvious air leaks, like in this video, are bad because they are noisy.
Hi! thanks for you videos. they are really well made and clear. Can you make a video on how to ''design'' bracing inside an enclosure. Like how much is enough, or not enough or too much. what are the rule and etc.. thanks!
Hi do you think that you could make some bookshelf speaker Whith about 100wrms/speaker and a studio quality With a maximal flat response also in low frequency Also +1 like
Hello Sir. I tried to measure the ts paras as you explained. Problem is , I think Iam doing everything right, but during caliberation, the clipping error is showing up every time. Altering the input levels do no change. Could it be sound card issue, as mine is a cheaper chinese thing. Could not understand what the problem is.
Put a piece of blue painters tape over the power and phase switches, this worked for me with that plate amp (which is WELL known to leak in that spot).
Sir you've just had yourself another subscriber! Quality content! Can you please make a video on T/S measurements for compression drivers? I wanna make some midrange horns using hornresp, but I couldn't find any proper measurement method for CD's. Very appreciated.
Hey all your videos are just wonderful !!!! Can you do one on H frame subwoofer please ?? For example, with a 15" or 18" high QTS driver, how to determine optimum size of h frame, optimum front and rear cavity depth, and some basic design principles will be great !!! Your simple explanation makes it even more wonderful for learning
Thanks for this tutorial video and the excel sheet ! Can you help me pls regarding the following issue? I was trying with data for a 4 inch 30 watt small sony full range speaker. The box volume was coming with a negative number ! Fs - 202 Hz Qts - 1.23 Vas - 0.78 Ok ... I got my answer from your another video👍 But what should be done for small speakers having Qts more than 1.2 ?
@@AudioJudgement Sir I am intending for small personal listening. So eventually it will be a portable one. Hence, an infinite or open buffel will not be met for me. Now what would be the size for a large sealed box size?
@@sudiptasen6181 How large the box should be depends on the other speaker parameters. Having at least Fs, Qts and Vas is enough to determine the box size.
Hello Sir, You showed in the video that by putting Qtc=0.707 we will get maximum flat response in a sealed box. How to get maximum flat response in a ported box? Can we apply the Qtc rule here?
Yes, there are certain alignments for bass reflex boxes as well, one of which is the Butterworth response which has the maximally flat curve. Maybe for another video
Wow..you put a lot of effort into that box just to find out the amplifier is a blow through design! What a bummer! Great video though. Really enjoy your channel.
First off, great video, this is super helpful! So I've got my driver and amp plate picked out and am now in the design process for the box, and one thing I'd really like to do instead of painting or veneering my box is do an epoxy resin pour design on the outside. I've watched some videos of people making countertops out of MDF then doing epoxy pours to mimic a marble finish and it comes out looking pretty incredible; I think that would look awesome as a speaker box design. The thing with epoxy is that it's much thicker, heavier, and denser than regular paint or veneer and I was wondering what effect that may have on the sound of the box? I'm guessing if dampening material mimics a larger box then so would an epoxy coat around the outside since it would be harder for sound to escape the box with that extra layer. Was wondering if you have any thoughts on what effects that may have or how I may need to adjust the design of the box to account for the extra thickness/density of the box? Keep up the great videos, subscribed and waiting for more!
Btw going with a very similar driver, Dayton Audio RSS265HF-4 10" Reference HF. Slightly different amp as I'd like to be able to access a little more of the driver's capabilities without shelling out for Dayton's 500w; getting the Bash 300S Digital.
The layer of epoxy on the outside will do nothing for the internal volume. Placing dampening material inside the box, increases the perceived volume because the sound waves inside will behave differently. But dampening material has low density (if you squeeze it, you reduce it to something that barely occupies space), the physical internal volume is almost the same. So, for example if you put something solid inside, you decrease the internal volume. So, if you put epoxy on the exterior, you might increase the rigidity if the box and might not need bracing, but the internal volume (either physical or perceived) is the same.
@@BillWrightOttawa No, the amp is in the same position. Just placing an additional panel inside the box to separate the chamber of the woofer from the chamber of the amp.
Hello Sir. Good Evening. Sir, I want to ask that, does a Subwoofer box helps to increase the Bass output what the driver produces, like if wattage of driver is 30W, then does box makes it 40 or 50 ?
Hi Sir. I have seen in some music systems that the port and subwoofer are positioned at right angle faces. Does this make any difference ? I mean the faces on which port and the sub are same or different ?
@@swarajbiswas3056 That kind of decision is made usually to be space efficient. Probably there isn't any room on the front baffle for both the speaker and port. Also the port might be too long to be placed on the back panel etc
Bass output is not measured in watts, its measured in decibels. Input power is measured in watts. If we measured output power in watts the numbers would be very small - for 40 watts of input you get about 0.4 watts of output. But also, the ear doesn't hear sound energy linearly, so we need a logarithmic metric to measure the output. Hence we use decibels. The efficiency of the system is what you want to look at. Typically 90 decibels for 1 watt at 1 metre. Yes, generally ported speakers are more efficient than sealed boxes in the bass frequencies - by about 3dB.
Felicitari pentru canal si site. Sunt pasionat de diy audio si am descoperit de curand canalul tau si siteul pe care l-am lecturat cu placere. Era interesant sa arati si niste masuratori ale raspunsului produsului final, anechoic si in camera, chiar si cu problema scurgerii de aer. Poti sa imi spui de unde ai luat furnirul si ce esenta este? Multumesc.
Salutare! Furnirul l-am luat de pe Audio Alchemy acum ceva timp. E un site romanesc care arata cam invechit dar e de incredere. Se poate comanda pe mail. Furnirul este de palisandru si este cam scump. Am luat o data mai mult pentru niste boxe de podea si mi-a mai ramas. Este scump pentru ca este printe putinele esente care vine in latimi mari. Altfel, daca furnirul nu este cel putin la fel de lat ca panoul, trebuie imbinate mai multe bucati una langa alta. Sigur nu ma pricep sa fac asta si am preferat sa iau un furnir care sa necesite o singura bucata pentru fiecare parte a boxei. Pentru un subwoofer ca acesta, care nu e prea mare sigur gasesti si alte esente care sa fie la preturi decente si sa arate si bine.
