Vibrating speakers

4 stupid questions from me then

Why have a cabinet? - just suspend drivers along an inert pole. Is that what you mean by an open baffle, but is planar totally open? (I have no idea what planar is in this context, do we need any planar aspect anyway)

Surely the other drivers vibrate from the other drivers more than confusion from a box - so what happens there? It's all relative

Why are speakers/drivers in one speaker box? Why not have 3 or 4 or more boxes?

So a concrete floor is just as much a vibration issue as a wooden floor as the speaker will still vibrate the same, presumably ?

Don't listen , the loudspeakers is not like instrument , is totally different .just marketing trick. the vibrate very very small and under control by good manufacturers, most of manufacturers use very hard material . 

Send an email to Alan Shaw with your question and await his response.

As popularized in song not all vibrations are bad. Some are good. Some are really good.😉

tatyana69

Good questions. I’ll try and answer as good as I am able - others may do better.


Q1 Why have a cabinet ?

Well without a cabinet it is difficult to get good bass. If you take a driver out of its box and play music you will notice the sound becoming weaker and very little bass. This is why subwoofers still come in boxes. You can get more bass by using larger drivers but most people wouldn't want to or be able to accommodate them.

Planars are an entirely different type of loudspeaker which uses a frame - not a box to reproduce sound.  

Open baffles also use a frame/ baffle but with conventional drivers and still no box.


Q2 Driver interference

Yes drivers can interfere with each but good designs try to minimise this by either using stiff baffles to mount the drivers and/or mounting the drivers carefully.


Q3 Why not 3/4 boxes?

You can have 3/4 boxes but they will cost more and remember that more drivers can also mean a more complex crossover. Not always desirable as even a 2 driver speaker can be already quite complicated. Some of the most expensive speakers multi driver/multi box speakers such as made by Wilson and Focal are built like this.

Q4 A concrete floor and a wooden floor?

A concrete floor is liable to have a different vibration than a wooden one in terms of resonances.

I’m guessing most speakers will perform better on a concrete floor, but there’s also the issue of secondary reflections. You know how voices sound different indoors and out - it’s a bit like that with floors and rooms.

For your interest I can also suggest that you watch this YouTube lecture by Dr Floyd Toole.

https://youtu.be/zrpUDuUtxPM

A fellow member djones51 posted the link recently and although the lecture is quite long it’s also very informative.

After a lifetime in audio Dr Toole has probably forgotten more about loudspeakers than most of us will ever learn.