Sorry I dont understand this. I know speech and telephone have their own bandwidth and I'm not saying anything to the contrary. Whats that got to do with my proposed modification?
Not spaced enough to appreciate a sensible difference in what?????
[It was a side point.... ie that it wouldn't matter whether the bass in the material you listen to was mixed to mono or was actually in stereo. Your woofers are so close together it would sound like they're coming from the same place anyway.]
Anyway, all this aside I don't think removing the divider will make any beneficial difference. Why do you want to do it?
Anyway, all this aside I don't think removing the divider will make any beneficial difference. Why do you want to do it?
My 'innocent boy' attitude would lead me to destroy the box and make two nice 2-ways with the same speakers.
Which is not an easy task, absolutely not!
Which is not an easy task, absolutely not!
Someone lent me a Philips soundbar with one amp gone, it had some nice 8 ohm oval/rectangular cones(I'll use 'em for midrange) and two 16 ohm tweeters.
OK thanks I get what he was saying now. Yes makes sense.
One of the reasons was the following in the OP, related with losing the boominess at 115Hz.
I wouldn't say I particularly want to do it though, rather I want to know what the positive and negative ramifications would likely be, with a view to deciding whether to stick or twist, and learn something.
At the moment, from what I can gather from readings, replies here, and in other forums, the likely result would be:
1.Some loss of clarity and volume due to some phase cancellation inside the enclosure from any out of phase stereo signal destructively interfering (phase cancellation) inside the enclosure (any correction or further explanation of this in particular is most appreciated). This will depend on the degree to which signal arrives at the woofers out of phase with each other, and from what I understand, this does happen frequently with stereo recordings of bass and drums (any confirmation of whether all commercial music tends to have stereo bass signal summed to mono is appreciated).
2. Some gain in clarity caused by a lowering of the Q of the system, but only at instances where left and right signals differ (eg. out of phase, different volume, etc.)
3. Some loss of overall volume caused by a lowering of the Q of the speaker, but only at instances where left and right signals differ (eg. out of phase, different volume, etc.).
Can anyone chime in on those?
I still think removing the divider will do less good than you think.
Place a medium amount of stuffing (fibreglass etc) into the enclosures. If you get the amount right it will make it act like it's a little larger and will absorb some of what you talk about above.
Place a medium amount of stuffing (fibreglass etc) into the enclosures. If you get the amount right it will make it act like it's a little larger and will absorb some of what you talk about above.
Ok. Why?
Are you saying the above revised summary I have made is wrong? Incomplete? I have tried to factor in all your and others previous suggestions and explanations in it and all the theory I have read so far.
Could you elaborate?
Cheers for the suggestions so far. There's no 'thank' button in this forum right?
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The main reason is that most of the time what happens on one side happens on the other, so it's the same as having a divider whether there is one or not... and when it doesn't the damping material will take care of most of the rest. Remember that damping material is not a bad thing and it can make your box act slightly bigger.
Yeah I figured that's why removing the divider would only have any practical effect where, as you explained, the stereo signal differs at any given instant.
'Take care of most of the rest' of what?
The higher frequency behaviour that you suggested earlier. It's difficult keeping track of whether this is a thread about what happens or how to deal with it, but measuring before and after is another option.
I don't know what you are referring to here.
To summarize my modification and learning goals in this thread, I'd like to know the acoustic ramifications of removing the divider in the speaker.
So far, I understand them to be the following:
1.Some loss of clarity and volume due to some phase cancellation inside the enclosure from any out of phase stereo signal destructively interfering (phase cancellation) inside the enclosure (any correction or further explanation of this in particular is most appreciated). This will depend on the degree to which signal arrives at the woofers out of phase with each other, and from what I understand, this does happen frequently with stereo recordings of bass and drums (any confirmation of whether all commercial music tends to have stereo bass signal summed to mono is appreciated).
2. Some gain in clarity caused by a lowering of the Q of the system, but only at instances where left and right signals differ (eg. out of phase, different volume, etc.)
3. Some loss of overall volume caused by a lowering of the Q of the speaker, but only at instances where left and right signals differ (eg. out of phase, different volume, etc.).
Regarding padding, my understanding is that adding padding/lining/stuffing:
1. Absorbs some of the back wave, thereby reducing enclosure panel vibrations and additionally reducing the propagation of the backwave outside the box, thereby reducing (for low frequency signal) both destructive interference (phase cancellation) and constructive interference outside the box, and inside the box to some extent.
2. Lower the Q of the system, thereby reducing the frequency response spike at the resonant frequency of the driver + system, reducing efficiency, improving transients, reducing vibrations, and lowering overall volume.