Looking to add a port to 2 sony SS-mb215 speakers (Bought as a pair for $7.50, so i am willing to take risks) to improve bass response, as i find the low end to be a little better with the woofers in free-air, Is this a good idea?
Almost certainly the answer is NO. Whether or not your speaker can be used in a ported design can only be answered if you have the TS specs. Depending upon its TS specs a speaker will be suited to a closed box design or a ported design. Some - just a few - may be used in either alignment. However, even if yours could be used in a ported design, the box volume will be quite different.
Executive summary: give them away and buy a speaker that suits a known design. Have fun building that, and enjoy the results.
Executive summary: give them away and buy a speaker that suits a known design. Have fun building that, and enjoy the results.
It is, especially because you're looking to have some fun and even if you don't like the end result, it isn't hard to stuff the vent and effectively return the enclosure in the original sealed one. Try to use a variable length vent to speed up the mods. If you look inside, you might find very cheap and only a couple of capacitors as high pass filters for the cone tweeter and supertweeter. That is also a place to improve the sound but won't happen without measurements with a microphone. Woofer like this usually works filterless.
Thanks for the answer. I decided to go with your answer because:
1. These are my first loudspeakers, and i want to keep them even after i am out of college. (Yes, i am one of those audiophile kids who always get yelled at by their parents, for just being an audiophile.)
2. You look like you have more experience on diyAudio than the other person that replied.
So i wont be adding a port. 🙂
and again, thanks for the reply!
Yeah, fooled with a lot of Sony drivers, speakers beginning in the late '60s and their long time fondness for the so called acoustic suspension [AS] cab alignments precludes getting much in the way of bass increase porting a small cab and to some folks they sound worse overall.
The fact that the driver's low end sounds better with no cab is a big clue that the motor is too weak for venting unless installed in a proper 1/4 WL pipe [TL].
GM
The fact that the driver's low end sounds better with no cab is a big clue that the motor is too weak for venting unless installed in a proper 1/4 WL pipe [TL].
GM
Experimenting should always start the same way: figure out how you are going to evaluate your project. Using REW on your laptop and using the laptop's mic, you can establish a reliable test protocol and its free. (In your case, you need to be compulsive about keeping the speaker and the laptop in their exact same places for each test.)
Just start drilling holes in the back. Simple as that (provided you can measure the results).
As far as Brisso57's solution, you know the old joke, "If you want to smoke here, you have to put out your cigarette or go elsewhere".
Ben
Just start drilling holes in the back. Simple as that (provided you can measure the results).
As far as Brisso57's solution, you know the old joke, "If you want to smoke here, you have to put out your cigarette or go elsewhere".
Ben
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