Whatever works. I won't argue with results.
I had not thought of making them shallower, but had thought about making them shorter. Just worked up passive BSC and 2nd order crossover to add the XT25's. I think the BSC will balance the mid base much better and I won't have to adjust the size. I hope the second order helps on the breakup.
I had not thought of making them shallower, but had thought about making them shorter. Just worked up passive BSC and 2nd order crossover to add the XT25's. I think the BSC will balance the mid base much better and I won't have to adjust the size. I hope the second order helps on the breakup.
What got this started is the box tuning was to high, to lower the tuning the slot/ports would have been the size of straws........:-/
In that respect - mission accomplished; "low" tuning with huge ports. This should be be good; can't wait to finish up.
Another pair right behind....Aye Carumba!!
In that respect - mission accomplished; "low" tuning with huge ports. This should be be good; can't wait to finish up.
Another pair right behind....Aye Carumba!!
Tvr,
You the nail on the head a couple of times, the full range boxes do chuff a bit, not so much you can hear it over the music.
They are sounding nice, light and quick. I did pull out huge pieces of damping material (since the last time I had them together) and I like them better than before.
The midrange breakup...maybe that's why they need hours of break-in-time.
Let me know when you get you go mobile with mic, etc.
You the nail on the head a couple of times, the full range boxes do chuff a bit, not so much you can hear it over the music.
They are sounding nice, light and quick. I did pull out huge pieces of damping material (since the last time I had them together) and I like them better than before.
The midrange breakup...maybe that's why they need hours of break-in-time.
Let me know when you get you go mobile with mic, etc.
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Chuff - Chuff Eliminated!
Well the chuffing is gone now....built new boxes with 1/16" WIDER slots, also rounded over the inter panels (inside) with round-over bit.
Going to tune by ear A/B, comparing with the other boxes;it's tuned right around Fostex specs (57hz) with the untrimmed filler pieces. I need to be carful not to trim them too much; or will be gluing up more.
Will of course use generator also.
btw, let me know if you need any of these prototypes..........
Well the chuffing is gone now....built new boxes with 1/16" WIDER slots, also rounded over the inter panels (inside) with round-over bit.
Going to tune by ear A/B, comparing with the other boxes;it's tuned right around Fostex specs (57hz) with the untrimmed filler pieces. I need to be carful not to trim them too much; or will be gluing up more.
Will of course use generator also.
btw, let me know if you need any of these prototypes..........
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We can easily measure the actual box tuning with just my WT-2. Then compare what you hear to what we measure. Sometimes surprisingly good things come out of that, and occasionally hints when it does not work well.
While I am in between primer coats, I'll work on getting my portable rig set up.
While I am in between primer coats, I'll work on getting my portable rig set up.
The slot port reminds me of those pedestal room fans with the narrow ring slot but no blades. It seems like an opportunity to optimise the flow which was done with an aerofoil at the opening. The small conventional fan in the base of these with its narrow diameter can be quite noisy.
Looking for a tweeter for this box
We had a little listening get together yesterday. The small dark wood covered boxes (pic in post #1) were holding their own. Lots of solid bass, imaging is very good (which I always thought) but it was good to hear it from somebody else. We tried several pairs of speakers; this was the runner up
So the second part of this post. Looking for a tweeter for this box, it sounds pretty good for a full range, lacking top end crack, e.g. can't hear wood hitting cymbals. The imaging is impressive, just no high end
I was thinking about a small tweeter to handle 4,000 >
Vifa XT25SC90-04 1" Dual Ring Radiator Tweeter 264-1014
This is the woofer in the box:
Tang Band W5-1611SAF 5" Full Range Speaker 264-918
btw, getting some really nice lows out of this box, really low.
We had a little listening get together yesterday. The small dark wood covered boxes (pic in post #1) were holding their own. Lots of solid bass, imaging is very good (which I always thought) but it was good to hear it from somebody else. We tried several pairs of speakers; this was the runner up
So the second part of this post. Looking for a tweeter for this box, it sounds pretty good for a full range, lacking top end crack, e.g. can't hear wood hitting cymbals. The imaging is impressive, just no high end
I was thinking about a small tweeter to handle 4,000 >Vifa XT25SC90-04 1" Dual Ring Radiator Tweeter 264-1014
This is the woofer in the box:
Tang Band W5-1611SAF 5" Full Range Speaker 264-918
btw, getting some really nice lows out of this box, really low.
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Finished Product
Here's a pic of the TV/speakers. I tried to make it easy for the wife to use so using the TV's mini 1/8" R/L out, right into a amplifier, however losing a lot of the high end.
I guess I could bypass the 0.1 with a clip lead and see if there is significant increase in the treble.
Again - Thanks for the help!
[need to make mini stands for the speakers]
Here's a pic of the TV/speakers. I tried to make it easy for the wife to use so using the TV's mini 1/8" R/L out, right into a amplifier, however losing a lot of the high end.
I guess I could bypass the 0.1 with a clip lead and see if there is significant increase in the treble.
Again - Thanks for the help!
[need to make mini stands for the speakers]
Attachments
Try Everything!
I spent most of the day on this yesterday -
There was one mistake I found early, the set-top-box was set to "heavy" which is like a "loud" button; turned that off.
I gave up on the digital (HDMI) hook up (for sound), I was going thru the TV's D/A converter for a preamp, it was adding color to the sound.
The better hook up: was Analog - Set-Top-Box to amp (only). The STB has a variable out, so can adjust level from easy chair - but there is no switching.
The tweeter needed a little help, added small caps until the tweeter sounded balanced (I didn't think the middle was a issue) I went from a 3.9uf to 5.9uf (as shown).
The xo circuit works very well, the imaging is very good, with a stereophonic sound.
I spent most of the day on this yesterday -
There was one mistake I found early, the set-top-box was set to "heavy" which is like a "loud" button; turned that off.
I gave up on the digital (HDMI) hook up (for sound), I was going thru the TV's D/A converter for a preamp, it was adding color to the sound.
The better hook up: was Analog - Set-Top-Box to amp (only). The STB has a variable out, so can adjust level from easy chair - but there is no switching.
The tweeter needed a little help, added small caps until the tweeter sounded balanced (I didn't think the middle was a issue) I went from a 3.9uf to 5.9uf (as shown).
The xo circuit works very well, the imaging is very good, with a stereophonic sound.
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This is all great stuff, ODougbo! I have in mind a similar project with some small 4ohm polycones I have lying about.
I get in terrible trouble for saying this stuff is all quite straightforward, but it's interesting that you have ended up with something not a million miles from the Epos ELS-3 design. Naturally, 2nd order tweeter is better with time-alignment, 3rd order on flat baffles. We don't find tweeter phase reversal and time-alignment too difficult either, eh?
Up the diy-ers for MUSICAL speakers!
I get in terrible trouble for saying this stuff is all quite straightforward, but it's interesting that you have ended up with something not a million miles from the Epos ELS-3 design. Naturally, 2nd order tweeter is better with time-alignment, 3rd order on flat baffles. We don't find tweeter phase reversal and time-alignment too difficult either, eh?
Up the diy-ers for MUSICAL speakers!
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I'm really enjoying them (been on for hours now)....They never sounded better.
The plywood/angled/sand boxes may be helping
btw, only using 1.5oz of speaker wool.
Over the last several weeks, been trying different caps for tweeter:
3.9uf - Highs were a bit hard to hear
6.0uf - Too large (but some songs sounded great!)
4.7uf - Seems to be in the right range - a nice balance
The plywood/angled/sand boxes may be helping
btw, only using 1.5oz of speaker wool.
Over the last several weeks, been trying different caps for tweeter:
3.9uf - Highs were a bit hard to hear
6.0uf - Too large (but some songs sounded great!)
4.7uf - Seems to be in the right range - a nice balance
Did you ever find a PDF with frequency response for the Peerless 832591 4 ohm driver, ODougbo?
Reason I ask is the Peerless 832592 8 ohm version is just crying out for a notch filter at 4kHz.
15uF and about 0.1 mH and 1.5 ohm in series on the bass shunt for a 4 ohm speaker...
It's just nagging away at me. Haven't calculated the coil exactly, but it's in the right ballpark.
Reason I ask is the Peerless 832592 8 ohm version is just crying out for a notch filter at 4kHz.
15uF and about 0.1 mH and 1.5 ohm in series on the bass shunt for a 4 ohm speaker...
It's just nagging away at me. Haven't calculated the coil exactly, but it's in the right ballpark.
Attachments
Never found the PDF - there must be one out there. I'll email Madisound; this was a popular woofer years ago, there must be documentation.
My speaker buddy is set up with ARTA, I'll see if I can twist his arm and see if he'll measure them.
[btw, the woofers have layer of silicon and dust caps were removed]
[btw II, I had some the 8ohm (832592) didn't have the same punch as the 4ohm]
My speaker buddy is set up with ARTA, I'll see if I can twist his arm and see if he'll measure them.
[btw, the woofers have layer of silicon and dust caps were removed]
[btw II, I had some the 8ohm (832592) didn't have the same punch as the 4ohm]
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