So I've been attempting to model a PPSL cab with a short horn/waveguide slapped on the front.
I simmed the drivers in offset driver (OD) mode and created the plenum in S1 and S2.
The problem is that there is a large peak in the upper range of the cabs bandwidth which maxes out around 100Hz (ideally i'd like to get decent response up to 70-80Hz).
From what I have read the OD driver arrangement in HR would be both the drivers facing each other creating a standing wave?
Am I perceiving this problem correctly or is there something else at play?
Any suggestions for how I can deal with the upper range would be much appreciated.
Also any general suggestions would be valued also.
I simmed the drivers in offset driver (OD) mode and created the plenum in S1 and S2.
The problem is that there is a large peak in the upper range of the cabs bandwidth which maxes out around 100Hz (ideally i'd like to get decent response up to 70-80Hz).
From what I have read the OD driver arrangement in HR would be both the drivers facing each other creating a standing wave?
Am I perceiving this problem correctly or is there something else at play?
Any suggestions for how I can deal with the upper range would be much appreciated.
Also any general suggestions would be valued also.
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I'm not great with hornresp but have you tried modelling the slot as a front chamber , with the throat specified as the start of short horn ?
Yeah like Bob said or you can put some of it as the front chamber and kind of bs or cheat to describe the variety of things you might want to try consider that the driver is shooting directly in from the throat chamber entry but then the object but then the offset L12 he’s gonna be coming back from the side to center and there’s quite a few ways to try to nickel and dime that into something it might be very accurate or might be completely accidentally screwing yourself on because depending on the cross-sectional area is that going to be the actual longest dimension or is it going to be a 90° element that is actually more appropriate if it’s really skinny and tall.
Either way somehow horn response as to know exactly what to tell you or what you’re looking for in that slot design on purpose. And is it closing the gap in that one description in the same way that wood in the other ones and fired and ones flipped 90° coming in if you draw that maybe it helps so much and then the only thing that matters is how far it is from an actual closed end and the bounce back to the driver for the pressure wave phase to start with.
I get really confused and all that easily so I never really pursued much of this out of fear or just ignorance of how it might help and work
Either way somehow horn response as to know exactly what to tell you or what you’re looking for in that slot design on purpose. And is it closing the gap in that one description in the same way that wood in the other ones and fired and ones flipped 90° coming in if you draw that maybe it helps so much and then the only thing that matters is how far it is from an actual closed end and the bounce back to the driver for the pressure wave phase to start with.
I get really confused and all that easily so I never really pursued much of this out of fear or just ignorance of how it might help and work
Have a look at the front chamber / throat of the Labhorns, it looks very similar to what you are wanting to build.
Rob.
Rob.