Hello.
I have a load of drivers kicking around. There are two I would really
Like to use. The Beyma 10BR60. And a decent css4.5” square basket bmr.
I would really like to make something that looks a little similar to the new jbl l100.
I thought this design could work well In an open baffle (or more likely an H frame baffle). With the bmr running sealed. Active xo.
Does anyone know where to start with baffle dimensions?
I have a load of drivers kicking around. There are two I would really
Like to use. The Beyma 10BR60. And a decent css4.5” square basket bmr.
I would really like to make something that looks a little similar to the new jbl l100.
I thought this design could work well In an open baffle (or more likely an H frame baffle). With the bmr running sealed. Active xo.
Does anyone know where to start with baffle dimensions?
Shortest distance front to back as big as possible.
Avoid emphasis on any particular distance. (Almost any shaped panel except a round one will meet that.)
You'll need lo locate the speakers in the room so as to benefit from the rear radiation (like not too close to walls). That adds to the heterogeneity of the phase interactions and the much desired ambience.
Unless your sealed woofer comes in rather low, you'd be surprised at how little correction for cancellation an OB in a typical room needs. And how good well recorded classical music sounds compared to boxes.
B.
Avoid emphasis on any particular distance. (Almost any shaped panel except a round one will meet that.)
You'll need lo locate the speakers in the room so as to benefit from the rear radiation (like not too close to walls). That adds to the heterogeneity of the phase interactions and the much desired ambience.
Unless your sealed woofer comes in rather low, you'd be surprised at how little correction for cancellation an OB in a typical room needs. And how good well recorded classical music sounds compared to boxes.
B.
Ummm, besides post #2, put the tweeter(s) at ear height and maybe put a second tweeter facing rearwards.* Shape doesn't matter, I think, but good to have it solidly on the floor to lengthen that path.
B.
* Linkwitz thought that was a great idea in one paper of his.
B.
* Linkwitz thought that was a great idea in one paper of his.
Beyma10 on an H frame on its own will not give you enough bass.
Have you tried the bmr on open baffle?. With the drivers you have you can run the bmr open back and put the woofer on a sealed box. Crossover around 200hz. Wide flat baffle (45-50cm) for the widebander, no wings.....cover the baffle with felt.....backfiring Dome tweet....done
Have you tried the bmr on open baffle?. With the drivers you have you can run the bmr open back and put the woofer on a sealed box. Crossover around 200hz. Wide flat baffle (45-50cm) for the widebander, no wings.....cover the baffle with felt.....backfiring Dome tweet....done
TimbreAudio, if you were looking for ideas on OB you might want to look at this site even though the drivers are different the baffle size and shape might be useful to you.
Gainphile: S20-Z Compact Open Baffle using Zaph Kit
C.M
Gainphile: S20-Z Compact Open Baffle using Zaph Kit
C.M
Hmm. Maybe it’s best if the woofer cabinet is sealed?
I think the bmr’s work best in sealed cabs too.
I might stick them on some ply and see how it sounds. Always keen to build a couple of subs.
I think the bmr’s work best in sealed cabs too.
I might stick them on some ply and see how it sounds. Always keen to build a couple of subs.
Some confusion about woofers and subwoofers.
The lower the OB goes the better the sound. But at some point going down, OBs fail to deliver bass, at least without special considerations of baffle size and bass boost.
A key factor that drives the design is the room layout because that determines the crossover point to subs or to a mixed bass system (one sub or several playing a mixed signal).*
Under the most favourable conditions (bass sealed box located in-between the OBs or flanking them), you can probably get great sound with a 18dB crossover slope at 200.... which is plenty high enough for a reasonably small OB and a modest-sized mid and without EQ in any reasonable listening room.
B.
* that textbook figure of 80 Hz is arbitrary and irrelevant.
The lower the OB goes the better the sound. But at some point going down, OBs fail to deliver bass, at least without special considerations of baffle size and bass boost.
A key factor that drives the design is the room layout because that determines the crossover point to subs or to a mixed bass system (one sub or several playing a mixed signal).*
Under the most favourable conditions (bass sealed box located in-between the OBs or flanking them), you can probably get great sound with a 18dB crossover slope at 200.... which is plenty high enough for a reasonably small OB and a modest-sized mid and without EQ in any reasonable listening room.
B.
* that textbook figure of 80 Hz is arbitrary and irrelevant.
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