Last year the design below was posted on diyaudio for a tapped horn with a LAB12 driver in this thread.
With the Danley DTS10 being a bit of a craze at AVS at the moment, but not available forever, I was looking at this design again and wondering whether it would be worth building. The aspect that puts me off most is the size, but I have no WAF issues and a quad of new LAB12's still in boxes.
The DTS10 uses a driver 'similar' to the LAB12 (actually 2 of them).
The limiting factor for the most TH designs is excursion at some frequencies. This is definitely the case for this one and the LAB12, so I wondered how the Shiva might work. So after nearly a minute's hard work plugging the driver parameters into Hornresp and making Le 10mH, I came up with the following (note, all are quarter space in my images);
Shiva TH input screen:
2.83V FR comparison at 2.83V: Black = Shiva, Grey = LAB12
Displacement Limited SPL Comparison: Black = Shiva (52V), Grey = LAB12 (24V)
Shiva Cone Displacement at 52V:
LAB12 Cone Displacement at 24V:
This ERSE Inductor is the one I had in mind for the Shiva.
I also just realised I forgot to add the DCR of the above coil into the earlier calcs (Rg=0), so I redid the Shiva 2.83V with and without.
Not enough difference to worry about for me.
Edit: Black is with inductor R, grey without.
Note: 52V into 3.8R is about 700W, and 24V into 4.26R is 135W.
Do you think 4 of these, either driver, would be too much for a 52 cubic metre (1836 cubic ft for countries still stuck in the 19th century) apartment?
Thought this might give some Shiva owners, or potential owners, another option to play with.
With the Danley DTS10 being a bit of a craze at AVS at the moment, but not available forever, I was looking at this design again and wondering whether it would be worth building. The aspect that puts me off most is the size, but I have no WAF issues and a quad of new LAB12's still in boxes.
The DTS10 uses a driver 'similar' to the LAB12 (actually 2 of them).
The limiting factor for the most TH designs is excursion at some frequencies. This is definitely the case for this one and the LAB12, so I wondered how the Shiva might work. So after nearly a minute's hard work plugging the driver parameters into Hornresp and making Le 10mH, I came up with the following (note, all are quarter space in my images);
Shiva TH input screen:
2.83V FR comparison at 2.83V: Black = Shiva, Grey = LAB12
Displacement Limited SPL Comparison: Black = Shiva (52V), Grey = LAB12 (24V)
Shiva Cone Displacement at 52V:
LAB12 Cone Displacement at 24V:
This ERSE Inductor is the one I had in mind for the Shiva.
I also just realised I forgot to add the DCR of the above coil into the earlier calcs (Rg=0), so I redid the Shiva 2.83V with and without.
Not enough difference to worry about for me.
Edit: Black is with inductor R, grey without.
Note: 52V into 3.8R is about 700W, and 24V into 4.26R is 135W.
Do you think 4 of these, either driver, would be too much for a 52 cubic metre (1836 cubic ft for countries still stuck in the 19th century) apartment?
Thought this might give some Shiva owners, or potential owners, another option to play with.