I am going to be building a pair of speakers for my home theater that I would appreciate some crossover help on.
In each box, there will be 5 speakers. Below is a list of the speakers I am using and the targeted frequency range I would like to use for:
Tweeter (2 inch, 4 Ohm) (8Khz - 20khz+)
Mid (6.5 inch, 4 Ohm) (800Hz - 8Khz)
Woofer (8 inch, 8 Ohm) (160Hz - 800Hz)
Subwoofer (12 inch, 4 Ohm) (80Hz - 160Hz)
Subwoofer (12 inch, 4 Ohm) (Up to 80Hz, with ports)
*Both pairs of the 12 inch subs are identical. In the targeted crossover frequencies, I've taken into consideration the 6DB band-pass slope. I've built simple 2 and 3 way speakers before, but it's been awhile and this is more complex.
My NAD amplifier is capable of a 2, 4 or 8 Ohm load. I am looking to target 8 Ohms at the speaker terminal if possible. However, if need be, I may just use a separate amplifier for the 12 inch subs and treat the Tweeter, Mid and Woofer as a 3 way.
The box will definitely be a work in progress.
I strongly prefer to use 1st order crossovers at least with the Harmonics, Upper voice and Lower voice frequencies. As for the subs, I'll do whats needed to keep them strictly in their targeted frequency range.
Is this possible to do and achieve 8 Ohms at the terminal given how I would like to build the crossover?
In each box, there will be 5 speakers. Below is a list of the speakers I am using and the targeted frequency range I would like to use for:
Tweeter (2 inch, 4 Ohm) (8Khz - 20khz+)
Mid (6.5 inch, 4 Ohm) (800Hz - 8Khz)
Woofer (8 inch, 8 Ohm) (160Hz - 800Hz)
Subwoofer (12 inch, 4 Ohm) (80Hz - 160Hz)
Subwoofer (12 inch, 4 Ohm) (Up to 80Hz, with ports)
*Both pairs of the 12 inch subs are identical. In the targeted crossover frequencies, I've taken into consideration the 6DB band-pass slope. I've built simple 2 and 3 way speakers before, but it's been awhile and this is more complex.
My NAD amplifier is capable of a 2, 4 or 8 Ohm load. I am looking to target 8 Ohms at the speaker terminal if possible. However, if need be, I may just use a separate amplifier for the 12 inch subs and treat the Tweeter, Mid and Woofer as a 3 way.
The box will definitely be a work in progress.
I strongly prefer to use 1st order crossovers at least with the Harmonics, Upper voice and Lower voice frequencies. As for the subs, I'll do whats needed to keep them strictly in their targeted frequency range.
Is this possible to do and achieve 8 Ohms at the terminal given how I would like to build the crossover?
800hz-8khz
I would not pick 6.5" for this range as you'll be out of pistonic range and deal with various cone breakup.
3" would be my best option (4" at the most)
Read about beaming for some insight.
Used to use 6.5" for midrange (300-3.5K)
Dropping to 4" (350-4k) yielded good improvement in room interaction and the tweeter matched better to the system. Did loose sensitivity but beside this it was better in almost every aspect.
To keep sensitivity, I would suggest MTM configuration
In my case, I've moved to Horn midrange (600-7k) and I think they are keepers...
I would not pick 6.5" for this range as you'll be out of pistonic range and deal with various cone breakup.
3" would be my best option (4" at the most)
Read about beaming for some insight.
Used to use 6.5" for midrange (300-3.5K)
Dropping to 4" (350-4k) yielded good improvement in room interaction and the tweeter matched better to the system. Did loose sensitivity but beside this it was better in almost every aspect.
To keep sensitivity, I would suggest MTM configuration
In my case, I've moved to Horn midrange (600-7k) and I think they are keepers...
Thanks so much for the reply.
I am flexible in most of my build, but am trying to work with the speakers I have. I could adjust the frequency ranges if need be or swap out the speaker for one better suited.
I also have these speakers available to me.
1 pair of 4" Ayima 8 Ohm speakers which are very detailed in the upper range (IMO very impressive for a cheap speaker).
1 pair of 5-1/4" Audax HM130Z4 (dual voice coil, 8 Ohm each voice coil).
What do you think?
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