I'm looking to complement a system in progress (2x dayton pa310-8, Faital 6fe200-8, Dayton pt2c-8 in open baffle) with stereo subs. From what I can tell so far, my current setup pretty much taps out around ~60hz, and I'd like to add some sound from about 40Hz, crossing to mains around 70hz or so.
Use is strictly music, not even the super bass heavy stuff. Power will come from a tda7498e board (I have one per channel, so could bridge it), so higher impedance is probably better. Other restrictions are size and cost. Smaller is better, 1cuft is max.... Looking for bang for buck type of stuff.
The room is about 12 by 25ft or so. It'll run off a miniDSP, so EQ is available.
Appreciate any suggestions.
Also, I'm a n00b at this so please use small words. 😉
Use is strictly music, not even the super bass heavy stuff. Power will come from a tda7498e board (I have one per channel, so could bridge it), so higher impedance is probably better. Other restrictions are size and cost. Smaller is better, 1cuft is max.... Looking for bang for buck type of stuff.
The room is about 12 by 25ft or so. It'll run off a miniDSP, so EQ is available.
Appreciate any suggestions.
Also, I'm a n00b at this so please use small words. 😉
A 1 cu ft. enclosure will not play loud at 40 Hz unless you throw power at it. At least compared to your mains.
How about extending the bass of your mains using an equalizer? If they are ported, the ports must be extended to tune the enclosure to 40 Hz.
How about extending the bass of your mains using an equalizer? If they are ported, the ports must be extended to tune the enclosure to 40 Hz.
1 cubic foot is going to be a challenge, isn't it? But there are some very clever folks here who likely have an answer.
Your roll-off at 60hz is a little surprising, considering that the Dayton 12 has an Fs of 39Hz - and I can usually get an OB to play down to the woofer Fs on a reasonable baffle. The Qts of the Dayton does not make it the easiest choice for OB, so that might be what you are fighting there.
Your roll-off at 60hz is a little surprising, considering that the Dayton 12 has an Fs of 39Hz - and I can usually get an OB to play down to the woofer Fs on a reasonable baffle. The Qts of the Dayton does not make it the easiest choice for OB, so that might be what you are fighting there.
To clarify some things.
I know my mains are not great for open baffle. Its all more about the process of building, rather than making perfect speakers from the get go. Money and size are some major restrictions, and the fun is in doing the best you can within these restrictions.
Enlarging the baffle of the mains is not an option. BTW, I've been able to register music down to about 50hz, but I don't feel comfortable with the excursions this low. I'd rather bandpass the mains, and acknowledge the need for an enclosed subwoofer.
The mains are mounted in half of an H baffle (I'll post some pics later), just because i wanted to do something that has some visual appeal as well. (I'm also ok with doing things wrong, and learning from mistakes...) 🙂
So far, I think they sound fantastic, except for the lack of the absolute lowest registers.
I also do not need the subs to play extremely loud. I will not be hosting dance parties.
I know my mains are not great for open baffle. Its all more about the process of building, rather than making perfect speakers from the get go. Money and size are some major restrictions, and the fun is in doing the best you can within these restrictions.
Enlarging the baffle of the mains is not an option. BTW, I've been able to register music down to about 50hz, but I don't feel comfortable with the excursions this low. I'd rather bandpass the mains, and acknowledge the need for an enclosed subwoofer.
The mains are mounted in half of an H baffle (I'll post some pics later), just because i wanted to do something that has some visual appeal as well. (I'm also ok with doing things wrong, and learning from mistakes...) 🙂
So far, I think they sound fantastic, except for the lack of the absolute lowest registers.
I also do not need the subs to play extremely loud. I will not be hosting dance parties.
Please excuse the appearance, I'm still waiting on veneer. (well, laminate). Also, I still need to make a proper stand for the mid/high baffle.
And, I see that i left for the world to see a cutting error above my tweeter too.... Oh well, that will get filled in..
These speakers will be fully self contained Bluetooth speakers, with all electronics showing in the back side. (currently still running off some external amps.)
And, I see that i left for the world to see a cutting error above my tweeter too.... Oh well, that will get filled in..
These speakers will be fully self contained Bluetooth speakers, with all electronics showing in the back side. (currently still running off some external amps.)
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At the risk of talking to myself (which i really am doing at this point), thanks Pano, for questioning my frequency response. Turns out, i was just being a pansy. With some more EQ, I'm ok with hitting about 40hz on my mains with reasonable authority. It looks like i might be able to live without a sub until the itch starts again.
Indeed. That is what I found. Now, I must admit that most of it goes above my head, but the gist i got from it was to not make the cavity too deep. No relationships are spelled out in this document,or anywhere else about the depth of the cavity, and the attenuation of the signal.
Still, surely there is an optimal crossover frequency for a given dimension, only i don't know what it is, or how to calculate it
So, here are my numbers: inside width: 14". Inside height 33". Depth: 4.5". Xover now: 350hz. If you could help calculate the optimal crossover frequency for me, i would appreciate it. (keeping in mind that my box is an asymmetrical H frame).
Still, surely there is an optimal crossover frequency for a given dimension, only i don't know what it is, or how to calculate it
So, here are my numbers: inside width: 14". Inside height 33". Depth: 4.5". Xover now: 350hz. If you could help calculate the optimal crossover frequency for me, i would appreciate it. (keeping in mind that my box is an asymmetrical H frame).
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