Hello everyone!.. i have this driver (b&c ps32) and i am thinking of building a sub ,specifically a horn type. I have built mth30s in the past, with great results, using ps32's smaller ''brothers'' the pz32's. I have seen martinsson's roar 12 sub plan, i find this very interesting design. I have done some reading and it seems that this design have some opposers , maybe it needs sove development maybe not, so it can reach the success of the mth30 or the tham 12, tham 15. I am open to ideas of course, since this site is a huge tank of knowledge with people that they really love what they do. thanks in advance and KEEP BUILDING....
Hi dantonis,
First off, what are you trying to make exactly? I ask because you have presented the impossible.
A horn is very difficult to make into a sub as the mouth has to be very large. I mean house-sized large.
Second, you have presented a mid bass as a driver.
Do you want to make a bass bin?
Is this for loud rather than accurate?
Do you want another tapped horn or something different?
First off, what are you trying to make exactly? I ask because you have presented the impossible.
A horn is very difficult to make into a sub as the mouth has to be very large. I mean house-sized large.
Second, you have presented a mid bass as a driver.
Do you want to make a bass bin?
Is this for loud rather than accurate?
Do you want another tapped horn or something different?
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Dear Cal, i bought this driver from a bass guitar player who upgraded his gear. So, my previous experience with tapped horns makes me want to build something similar. I am not expecting miracles, i want something compact one man lift. I know i have to do compromises, anyway we cannot have it all. I must consider bass reflex options also, but i' d like to know the way to take the most out of the woofer.
I know tapped horns offer bang for the buck but I will have to ask others who are more acquainted, to offer you suggestions.
It does seem you have a MI driver so...
Hope the project goes well.
It does seem you have a MI driver so...
Hope the project goes well.
Edgarhorn designed a large down firing sub cabinet. Not sure if plans are out there but it was a great sounding sub.
Here is his Monolith sub plans.
https://static1.squarespace.com/sta...bed6f81/1612365824944/Edgar-Monolith-Horn.pdf
https://static1.squarespace.com/sta...bed6f81/1612365824944/Edgar-Monolith-Horn.pdf
Well, a tapped pipe (TP) can be as little as ~129 L net tuned to ~25 Hz, but can only handle ~50 W/105 dB/m/2pi or shorten it to ~87 L net for ~35 Hz/350 W/112 dB/m/2pi.
Although the 12PZ32 has a 3" voice coil and lower thermal power handling, the gap depth and winding height are both larger. More importantly, it's Qts is much lower and BL significantly higher, so it has a much stronger motor than the 12PS32.
So for PA, using the 12PS32 I would look at the MTH30, for home use I would consider the ROAR12. At PA volume the THD might become to significant in the ROAR 12.
The 12MH32 is another good option. It has a stiffer cone and lower distortion motor. My calculations show it needing a smaller horn mouth area, but its similar in other parameters.