V-plating 1850s or 186s for free dBs

Hi guys just a heads up to you guys that are using 1850 or 186 Horns

Over on the Bill fitzmaurice forum there is the concept of V-plating

Here is what it looks like with BFM Titans that are very similar in size and shape to 1850s





There has finally been a proper SPL test of how well this works and the results were as follows

Sine wave at 60Hz, Cabs placed on concrete driveway.

+4dB with the coupler

It seems that at 80Hz and up the coupler does not have as much of an effect, but put it this way, if you only have space to haul 2 cabs around, V-coupling them is likely to give you at least 3dB at 60Hz and below which may give you more sub and a warmer sounding low end.

I cant begin to estimate what it would do for a stack of 6 but for all you sub lovers there's only one way to find out.

If anyone does do this please post results and tell us how well it works.

Stu

Edited by Disco Stu - 02 May 2008 at 12:24am

interessant solution...

I think the limit to Fc of the horn with 1850s/186s is achieved with 4 boxes.

However not only does the coupler increase the effective mouth size but also puts another bit on the length of the horn, which should in effect achieve a slightly lower Fc.

So whether you use more cabs or not you might find an improvement in extension over straight stacking

@Toasty I think the recommendation is to just have the cabs stacked up with the coupler at the top, does it matter if its one large cavity or several smaller cavities? I doubt it.

Stu

Disco Stu wrote: toastyghost wrote: Not too sure how well it'd do regards to stopping people who already use bassbins as shelving for their drinks though. Bar perhaps shaking them back out again. Well it should keep the mouths of the horns away from the public, they would have to reach in to put their drinks there. Why not build a 20 pc. cup/bottle holder into the top, to try and prevent spilled drinks. Stu

That might not be such a silly idea

I might give it a go if it only needs one then, to get the Looney stack's very bottom end up to the savage volume of the 50Hz and up.

Heres an image from the BFM site of a chart of V-coupled Tubas vs stacked. The scale is rather too small for my liking but you get the idea.

Stu

Edited by Disco Stu - 02 May 2008 at 3:53pm

what about straping that arangement??? how you guna do that