Chris is looking for some examples he can measure in the DDR thread if you can help.
I am very surprised. The baffle step cannot be ignored with a speaker of this width, because without correction the midrange is about 5-6dB louder than the bass. To be honest, I wouldn't put something like that in my living room.
For classic rock and a low watt amp, would the SEAS A26 kit work?
Seas A26 10" 2-way Kit Pair (based on the classic A25)
p.s. Efficiency doesn't look high enough...
Seas A26 10" 2-way Kit Pair (based on the classic A25)
p.s. Efficiency doesn't look high enough...
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Take a look at the last creation of Troels, The Loudspeaker-III
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It will easily work with your amp because it only has to drive the mid and tweeter.
The 15" bass is driven by a Hypex module.
Advantage: bass can easily be tuned to your room or personal preferences.
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It will easily work with your amp because it only has to drive the mid and tweeter.
The 15" bass is driven by a Hypex module.
Advantage: bass can easily be tuned to your room or personal preferences.
Dave,
Those look like braces I did long time back - thanks for posting, brings back some memories. 🙂
https://www.diyaudio.com/forums/multi-way/368316-speaker-project-recommendation-4.html#post6548630
Those look like braces I did long time back - thanks for posting, brings back some memories. 🙂
https://www.diyaudio.com/forums/multi-way/368316-speaker-project-recommendation-4.html#post6548630
Nope. Baffle step is greatly misunderstood. One rarely ever gets a 5-6dB differential in on-axis sound over teh 2π to 4π transition. If needed 2-3 dB is more appropriate. BUT, every dB you raise the on-axis FR uowards the power response is raised upward. So in the act of flattening the on-axis bass response, one is causing an excess in the power response. So we have many systems with too much BSC ans a relative overweighting of the bass, which many like.
A careful balancing of driver FR, box gain and the room mean that these do not very often need any artifical BSC.
So far i have only ever had to do BSC in one of the hundreds of speaker boes we have built. Then i replaced teh $10 surplus drivers with SEAS FA22 and tossed the circuit.
dave
Zia,
Many small amplifiers are SE and as such more often than not have a high Rout so one has to worry about the speaker impedance.
I would be very careful trying to use a small SE amp with these speakers due to the artifical upper midrange bloom from the interaction of the amplifier and speaker impedances.
It would be worth trying with a small amp with a low Rout.
The simple design, very simple XO, lead to a box that is quite appealing if somewhat coloured. It is hard for a 10” to go as high as it does.
dave
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Good for you. All of my designs need an appropriate level of BSC or my ears bleed.
I don't know exactly what "fall apart" means either. I was just asking Dave who had earlier posted this:
"Now we are starting to play with WAW (Woofer Assisted Wideband), essentialy an extention of FR drivers that add helper bass drivers which addresses one of the most common complaints with FRs. FRs can start to fall apart when the music gets loud or really complex. I have found that few people listen that loud but many think they do."
However, I believe a similar concern about FRs with complex classical music was raised a few years ago by Bob Brines. He didn't put it in terms of falling apart, but rather as various forms of distortion due to a single cone trying to handle too much at the one time. Maybe that's just really the same thing using different semantics.
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Various forms of distortion, many we don’t know how to measure. At some point one starts to have that significantly affect the sonic enjoyment the listener is experiencing, then things fall-apart. The line is very much dependent on the listener.
On the other hand, in some multiways, due to the inadequacies of most XO arrangements, they fall apart before you even "drop the needle”.
dave
On the other hand, in some multiways, due to the inadequacies of most XO arrangements, they fall apart before you even "drop the needle”.
dave
I've been looking at the Alpair 12p and it's very appealing. But I'm not sure it would be good for OB with a Qts of only .285.
It is only suitable in an OB with a helper bass.
That is almost always the case. You are really only interested in how it works 200-400 hz and up. Well above the region where T/S have a role.
dave
That is almost always the case. You are really only interested in how it works 200-400 hz and up. Well above the region where T/S have a role.
dave
So, this is what I guess we would call OB/WAW. Or maybe WAW/OB. Or how about BOW WOW. That's much easier to pronounce. 🙂
