Stacking 1850s

Hi

when stacking the 1850s how close do they have to be to each other? I was thinking of putting rubber corner bumbers on them which would mean that there would be a small gap between the speakers when stacked (maybe 60mm between the outside edges). Would this effect the performance very much?

 

Cheers

it won't make any difference upto about 6 inches apart

from there you start to lose proper coupling of the horns and from half a wavelength and above you'll run into phase cancellation issues

would leaving a 5" gap effectively make the mouth of the horn larger?

Hi,

Horns need to touch if the horn path is to be extended. This will also incease mouth area. If there are large gaps then you have made a port between the cabs and it gets really hard to predict what is happening.

But two identical sound sources played within 1/4 WL will couple. So even if the horns are 86 cm apart everything below 100 Hz will couple.

 

Or the '+6dB thing' if you take doubling of power into account too.... :)

does this effect the extension even if the gap is a few mm. [ie the corners] or is it over an inch say? might seem like a daft question, but it may explain blown drivers on odd ocassions. ie "air leaks" in the stack [a few mm gap by not getting a perfect stackin on uneven floor] and settil hp at what it should be when coupled.