Mounting position

[marka101]

Can I mount a speaker on the outside of the baffle instead of the inside to shift magnet position to more inline with midrange speaker ? , would this make much difference ?
25mm baffle.

 

[OMNIFEX]

Yes.

 

[marka101]

yes i can mount or yes it will make much differance?

 

[OMNIFEX]

Yes you can mount the loudspeaker outside of the baffle board.

 

[ßart West-VL.]

The difference it would make for the midrange depends strongly on the crossover frequency, I think.
I high crossover could result in an audible difference between in- or outside mounting of the sub.

 

[marka101]

many thanks for your reply bart , 500 hz crossover , I thought the phase shift beniffits would out weigh the differance , the mid and tweet are serface mount.

 

[OMNIFEX]

If you are looking for the least amount of delay, having the voice coil of your midrange and woofer time aligned will reduce any phase issues.

 

[ßart West-VL.]

I'm not the expert here and I can't help you with calculations but the tweeter should be mounted backward too if you're concerned with phase issues.
I know I have an example in some magazine but right now no time to search...

 

[marka101]

I didnt know if there would be much impact on resonance, having 25mm (baffle thickness) of the cone out side of the internal enclosure ,if I mount the cone from the outside (having to apply a foam tape seal) bringing the speakers more into alignment

 

[weltersys]

many thanks for your reply bart , 500 hz crossover , I thought the phase shift beniffits would out weigh the differance , the mid and tweet are serface mount.

A 500 Hz wave is 2.26 feet long, speaker alignment within about 6.78 inches (1/4 wavelength) is "close enough" at that frequency.

 

[marka101]

many thanks all, will afix inside

 

[marka101]

unfortunately its 800 hz 1.4 ft long gives me 4", about an inch out, may have to fix outside after all.
will this affect res freq ?

 

[weltersys]

unfortunately its 800 hz 1.4 ft long gives me 4", about an inch out, may have to fix outside after all.
will this affect res freq ?

Generally speaking, a front mounted speaker has less diffraction problems than rear mounting.
Frequency response should be the same, other than the change from the slight cabinet volume increase.

 

[marka101]

weltersys, your reply much appreciated.

 

[GM]

I'm not the expert here and I can't help you with calculations but the tweeter should be mounted backward too if you're concerned with phase issues.
I know I have an example in some magazine but right now no time to search...

 

[ßart West-VL.]

Nice GM!

Maybe you can ad an extra baffle for the woofer, with rounded edges.

 

[GM]

Yeah, wish I'd noted who originally published it now that my memory has gotten so bad.

GM