Hi All,
In a tapped horn xmax peaks above fb and in almost every variation of small tapped horns driven by 10s or 12s that I've simmed, the sim seems to show that I run out of xmax long before I run out of power handling capability.
So, would anyone actually drive a real Danley TH-Mini with 1200 watts? Depending on where I try to put fb, xmax seems to run out in most clones between 200 and 450 watts (using the B&C 12PS100). What I'm asking is how can I relate the sim to real world with respect to maximum displacement?
I realize that power compression can become an issue also so perhaps this isn't all that bad? I just hear that people drive a pair of TH-Minis with 2500 watts and everything I've simmed looks like it would blow the cones out of the box at that power level. I'd like to get a handle on some rules of thumb here.
Ok, so, in searching for the optimum power handling/spl/size etc. configuration I'm trying to understand how xmax and multiple drivers relate. Is it as simple as xmax is halved per driver with two drivers? Or, is there a more complicated relationship? When I sim two drivers in hornresp, (using the menu option), is it giving me the xmax per driver? It seems to be somewhat inconsistent. I've noticed sometimes when copying an existing sim that it will retain some driver parameters.
I've also noticed that, holding other drivers constant, increasing surface area decreases xmax. Granted, you can't do this so trivially, that is, any change in surface area of a real driver will change other parameters as well, but ok, larger drivers produce more bass for less xmax.
Last bit before I tie this all together, I've noticed that really shrinking S2 can often smooth out the peaks in sims but this increases the SD/S2 ratio. I've been able to get some nice looking curves with high compression ratios, say 4:1. From everything that I've read, however, that only small drivers and very stiff cones can handle ratios this high. I've also noticed that I often get better looking sims with S1 larger than S2, is this related to the "cone correction" that I've been reading about in other threads? What are reasonable compression ratios, especially if one is looking at "cheaper" drivers?
Alright, so the real question is, for small PA tapped horns, it seems that multiple smaller drivers might produce better results? Granted, as you go smaller, power handling goes down and multiple drivers probably drive the weight up more than a single larger driver. But, modulo extremes, individual weight is less important than physical size. If one is trying to control one dimension of the cabinet so as to make the cabinets a one man lift, what's the optimum? One 12, two 10s, three 8s, four 6s?
I welcome all discussion, but I'd really like to hear Patrick and Art weigh in on this, if you guys have the time/interest.
tnx,
gs
In a tapped horn xmax peaks above fb and in almost every variation of small tapped horns driven by 10s or 12s that I've simmed, the sim seems to show that I run out of xmax long before I run out of power handling capability.
So, would anyone actually drive a real Danley TH-Mini with 1200 watts? Depending on where I try to put fb, xmax seems to run out in most clones between 200 and 450 watts (using the B&C 12PS100). What I'm asking is how can I relate the sim to real world with respect to maximum displacement?
I realize that power compression can become an issue also so perhaps this isn't all that bad? I just hear that people drive a pair of TH-Minis with 2500 watts and everything I've simmed looks like it would blow the cones out of the box at that power level. I'd like to get a handle on some rules of thumb here.
Ok, so, in searching for the optimum power handling/spl/size etc. configuration I'm trying to understand how xmax and multiple drivers relate. Is it as simple as xmax is halved per driver with two drivers? Or, is there a more complicated relationship? When I sim two drivers in hornresp, (using the menu option), is it giving me the xmax per driver? It seems to be somewhat inconsistent. I've noticed sometimes when copying an existing sim that it will retain some driver parameters.
I've also noticed that, holding other drivers constant, increasing surface area decreases xmax. Granted, you can't do this so trivially, that is, any change in surface area of a real driver will change other parameters as well, but ok, larger drivers produce more bass for less xmax.
Last bit before I tie this all together, I've noticed that really shrinking S2 can often smooth out the peaks in sims but this increases the SD/S2 ratio. I've been able to get some nice looking curves with high compression ratios, say 4:1. From everything that I've read, however, that only small drivers and very stiff cones can handle ratios this high. I've also noticed that I often get better looking sims with S1 larger than S2, is this related to the "cone correction" that I've been reading about in other threads? What are reasonable compression ratios, especially if one is looking at "cheaper" drivers?
Alright, so the real question is, for small PA tapped horns, it seems that multiple smaller drivers might produce better results? Granted, as you go smaller, power handling goes down and multiple drivers probably drive the weight up more than a single larger driver. But, modulo extremes, individual weight is less important than physical size. If one is trying to control one dimension of the cabinet so as to make the cabinets a one man lift, what's the optimum? One 12, two 10s, three 8s, four 6s?
I welcome all discussion, but I'd really like to hear Patrick and Art weigh in on this, if you guys have the time/interest.
tnx,
gs