That is my first 3-way inexpensive bookshelf speakers project. It is based on some drivers left from a previous project.
tweeter Monacor DT-25N
woofer Monacor SPH-6M
For the mid range one I think to get IMG Stageline SP 4/60PRO.
I know, that I started on wrong way, choosing the woofer and the tweeter before the mid range driver, but the simulation in XSIM gave me a good FR curve.
Should I expect some issues, applying those drivers working together in vented 18 liter enclosure (3-4 l chamber for mids) 5cm/14cm port tuned to 47Hz?
Also I was wondered from the power dispersed from the series l-pad resistor R5 (nearly 20W). Any suggestions for that?
Thank you in advance. Any recommendations are very welcome
tweeter Monacor DT-25N
woofer Monacor SPH-6M
For the mid range one I think to get IMG Stageline SP 4/60PRO.
I know, that I started on wrong way, choosing the woofer and the tweeter before the mid range driver, but the simulation in XSIM gave me a good FR curve.
Should I expect some issues, applying those drivers working together in vented 18 liter enclosure (3-4 l chamber for mids) 5cm/14cm port tuned to 47Hz?
Also I was wondered from the power dispersed from the series l-pad resistor R5 (nearly 20W). Any suggestions for that?
Thank you in advance. Any recommendations are very welcome
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Don't worry about the power dissipation of R5, in actual music there is very little power in the higher frequencies. A 5W resistor will suffice.
Your simulation only works for an infinite wall speaker. And I point you also the problem of the path difference for the drivers, have you accounted for that in the sims?
Ralf
Ralf
Thank you for your responses.
Ralf , I guess you mean how the drivers are located on the baffle. The baffle will be as small as possible (WAF). Probably 35/23 cm with front fired port. I will try to place them as close as possible to the woofer.
M T
W.
They will stay on the both sides on the TV, next to the wall. Of course they will need support from a subwoofer.(next project).
Should I build BSC cirquit in case I'm using a subwoofer?
Ralf , I guess you mean how the drivers are located on the baffle. The baffle will be as small as possible (WAF). Probably 35/23 cm with front fired port. I will try to place them as close as possible to the woofer.
M T
W.
They will stay on the both sides on the TV, next to the wall. Of course they will need support from a subwoofer.(next project).
Should I build BSC cirquit in case I'm using a subwoofer?
The baffle by itself and the placement of the drivers on it will alter the FR with 2 related effects, baffle step and diffraction. On a mid-bass driver the baffle imposes the baffle step (6dB loss on low frequencies), and often on top of that also a bump of up to 2dB. Starting with 2PI FR (infinite baffle) you need to simulate first the baffle effect, without your xsim simulations are useless, and the resulting speaker will be tonally inaccurate.
Have a look here, and specifically the linked presentation on how to design a speaker without measurements: software
A BSC circuit is only useful with a fullrange speaker which don't need a crossover, but with a normal speaker with a crossover, the baffle step effect can be simply handled with an appropriate oversized LP coil.
One last word on your proposed driver arrangement. Placing the mid next to the tweeter (instead on top or bottom) is a bad idea as this arrangement will create nulls lateral off axis and the good spot will be severely limited.
Ralf
Have a look here, and specifically the linked presentation on how to design a speaker without measurements: software
A BSC circuit is only useful with a fullrange speaker which don't need a crossover, but with a normal speaker with a crossover, the baffle step effect can be simply handled with an appropriate oversized LP coil.
One last word on your proposed driver arrangement. Placing the mid next to the tweeter (instead on top or bottom) is a bad idea as this arrangement will create nulls lateral off axis and the good spot will be severely limited.
Ralf
Thank you very much Ralf. I'm a pretty newbie in the loadspeaker design and I highly appreciate your opinion. I'm using WiniSD for enclosures and XSIM for crossovers. I need to find the proper way how to make the right calculations. Very useful link. Thank you once again!
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