14 awg air core for the mid? Would that be L3 (1.1 mH)? Not criticizing your design or decisions at all but that inductor must cost as much or more than the mid driver.
I mistyped on that. The superq is a 14awg, and the 1.1 is a 16awg. Still probably overkill, but the lower dcr modeled better. $16 coil on a $20 mid.... probably not the best choice.
Do look like they belong. I'm a big fan of 4 inch drivers handling mids, the inherent physics from the off axis for smaller cone drivers creating solid outward image. Curious if the bass from the 5x8's pleasing you too, as the ones from Todd as SDC24 did well in bass despite what any crude judgement of specs (Fs etc) suggest. So much we all learn from the experiences. Heh, then I wonder how long the crossovers remain external - I struggle when to decide that's a wrap.
The bass from the 5x8s is quite impressive. In this cabinet, they model to an F3 of just over 30hz, and in room they go quite low. From my first short listen, I like the bass better than my RS270p-4 woofers that have been what I would say my reference. As far a crossovers, I will leave them out till I am confident I like what I am hearing. That is different on each speaker. Even when I get them installed, i sometimes pull them out and make changes in the future. These drivers were pretty easy to work with, so I suspect I will have the crossovers installed in a week or so.
I also found the 5x8's easy to work with and pretty impressive bass-wise. I did a small sealed 3 way design with them (techtonic elements mid and AMT mini8 tweeter). Sealed f3 is below 60 Hz in about 14 liters (external box dimensions of 7"x11"x18")
Keep an open mind, but don't let your brain fall out.
I finished my voicing, and did a measurement of the speakers. Below is the measured response. It seems the highs are a bit higher that I expected. We will see if that bothers me long term and if I need to knock them down a bit. Otherwise I am happy.
If I need to flatten it, I just need to change the 5ohm resister to 7.5 ohms, ant it will drop it 2db to where I modeled it. This tweeter is so well behaved, I don't hear any issues with the higher treble. With the GRS planar I used, it would be super sibilant right now.
If your measurement is on axis, I bet that the listening axis (10-20 degrees) is a little closer to flat. A little smiley face on good drivers can be a really enjoyable speaker. If you don't like the idea of a smiley face and need a more audiophile term, you can call it a broad BBC dip
I believe both JohnH and I put a small lift in the top octave when we used the RT1.3, as it made it sound right to us. I know mine was maybe +2-3dB up there. With planar and ribbons being what they are and do, if they are wider, then the horizontal off axis is compromised as well. The vertical is usually hampered heavily, which helps with lower ceilings- until you stand up.
Comments
14 awg air core for the mid? Would that be L3 (1.1 mH)? Not criticizing your design or decisions at all but that inductor must cost as much or more than the mid driver.
I mistyped on that. The superq is a 14awg, and the 1.1 is a 16awg. Still probably overkill, but the lower dcr modeled better. $16 coil on a $20 mid.... probably not the best choice.
I started voicing these tonight. So far I am pretty impressed.
They look right at home.
Do look like they belong. I'm a big fan of 4 inch drivers handling mids, the inherent physics from the off axis for smaller cone drivers creating solid outward image. Curious if the bass from the 5x8's pleasing you too, as the ones from Todd as SDC24 did well in bass despite what any crude judgement of specs (Fs etc) suggest. So much we all learn from the experiences. Heh, then I wonder how long the crossovers remain external - I struggle when to decide that's a wrap.
The bass from the 5x8s is quite impressive. In this cabinet, they model to an F3 of just over 30hz, and in room they go quite low. From my first short listen, I like the bass better than my RS270p-4 woofers that have been what I would say my reference. As far a crossovers, I will leave them out till I am confident I like what I am hearing. That is different on each speaker. Even when I get them installed, i sometimes pull them out and make changes in the future. These drivers were pretty easy to work with, so I suspect I will have the crossovers installed in a week or so.
I also found the 5x8's easy to work with and pretty impressive bass-wise. I did a small sealed 3 way design with them (techtonic elements mid and AMT mini8 tweeter). Sealed f3 is below 60 Hz in about 14 liters (external box dimensions of 7"x11"x18")
Sehlin Sound Solutions
I finished my voicing, and did a measurement of the speakers. Below is the measured response. It seems the highs are a bit higher that I expected. We will see if that bothers me long term and if I need to knock them down a bit. Otherwise I am happy.
If I need to flatten it, I just need to change the 5ohm resister to 7.5 ohms, ant it will drop it 2db to where I modeled it. This tweeter is so well behaved, I don't hear any issues with the higher treble. With the GRS planar I used, it would be super sibilant right now.
Here is my crossover.
If your measurement is on axis, I bet that the listening axis (10-20 degrees) is a little closer to flat. A little smiley face on good drivers can be a really enjoyable speaker. If you don't like the idea of a smiley face and need a more audiophile term, you can call it a broad BBC dip
I agree. I always listen just a few degrees off axis. These sound really good so far.
I believe both JohnH and I put a small lift in the top octave when we used the RT1.3, as it made it sound right to us. I know mine was maybe +2-3dB up there. With planar and ribbons being what they are and do, if they are wider, then the horizontal off axis is compromised as well. The vertical is usually hampered heavily, which helps with lower ceilings- until you stand up.
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