Gotcha - I was thinking of using 200hz crossover freq. with Alpair6's because that is the highest I can bi-amp with my AVR. That would give me a 1/4 wavelength of ~17" which would be plenty but it may not be that simple. I know there's a reason Dave chose 333hz.
Midtweeter is in the middle because that gets the drivers as physically close as possible. The alternate would be to put the 2nd midwoofer on the side (or back (in if the ML-TL is maintained as wide)). It is important that Zd is maintained if you want to keep them in the ML-TL (so no top mounting)
dave
dave
333 Hz was Tysen. Not quite sure where the XO is on the MTM (because series XOs are slippery in that respect), somewhere between 300-400, closer to the former i'd guess. To keep XO simple it was targeted to be around the baffle-step frequency.
If you are going active and 200 is as high as you can go, then well worth a try.
dave
Thanks Dave - my top mounting idea was for a 2nd alpair6. The more I think about it, the single el166 MTM would probably suit better for my small room. One el166 and two alpair6m would give a pretty close efficiency match if I decided to go passive at some point.
No - when I posted that I was convalescing from smashed toes and I had too much time to think about speakers. Now that I'm back on my feet I have no time for anything but trying to catch up on my work. There is a light at the end of a very long tunnel.
Sorry to hear about your accident Jimbro. Hope you're better now. No worries, there's plenty of time to build, and it should get more interesting with the driver refresh both from Fostex and Mark Audio. Take care.
Dave, how tall would a speaker like this with two EL166 and an EL70 as mid-tweeter be?
I think i remember i had some sort of planset for this, but i seem to have lost it and can't find it again.
I think i remember i had some sort of planset for this, but i seem to have lost it and can't find it again.
Depends how you impliment the EL70. Basic ML-TL is here and, unless you fold it, determines minimum height.
http://p10hifi.net/tlinespeakers/Woden/downloads/EL166-MAno6-ML-TLs-280411.pdf
dave
http://p10hifi.net/tlinespeakers/Woden/downloads/EL166-MAno6-ML-TLs-280411.pdf
dave
Thanks. The dual EL166 version looks cool for me. But maybe a folded one would do for dad. But i'd like a slot port, if possible.
The dual-driver version cabinet is almost as the recommended cabinet when simulating in WinISD, for the black drivers.
For a dual driver version, how big would it be?
I noticed that the tuning changes between the round port and the slot port as in the drawings.
It isn't intended to. Somewhere -- maybe in this thread, i posted a link to the version i built.
dave
dave
I did not find any information about that here. But if i decide to build these with a slot port i could calculate the vent length to be the same tuning frequency as a round port version.
I'm not sure if i'll build the dual or single driver version...
Pros:
More headroom
More cone area
The EL70 is at a better height, more on-axis
Cons:
More expensive
Slightly larger
Less good-looking
If i decide to build those i'd need recommendations on filters too. I have an active crossover named Reckhorn S-1.
That is the filter options for that one.
I would actually prefer a passive filter since i wouldn't have to buy another amplifier and struggle with that sort of stuff. But i have no experiences of designing/building filters.
I'd like to keep this build as cheap as possible.
I'm not sure if i'll build the dual or single driver version...
Pros:
More headroom
More cone area
The EL70 is at a better height, more on-axis
Cons:
More expensive
Slightly larger
Less good-looking
If i decide to build those i'd need recommendations on filters too. I have an active crossover named Reckhorn S-1.
An externally hosted image should be here but it was not working when we last tested it.
That is the filter options for that one.
I would actually prefer a passive filter since i wouldn't have to buy another amplifier and struggle with that sort of stuff. But i have no experiences of designing/building filters.
I'd like to keep this build as cheap as possible.
????
any passive XO below ~200 Hz, is gonna start approaching the cost of another amp (unless you use really cheap parts)
dave
Well, i sit in a computer chair when listening. Not a sofa. So if the speaker shall be on-axis it as to be around 120cm above the floor. My current speaker stands are almost 1m tall.
Where do you recommend crossing it over?
Both the single & double driver versions are the same height, and avaerage driver Zd is the same. Since EL70 is in separate enclosure you can do all sorts of creative things to get it at the right height.
Given a suggested XO of 80-150 Hz the woofer boxes could be folded, put a cusion on top and you can have extra seating (or glass or a slab of rock & it becomes a couple tables to pile junk on.
dave
Given a suggested XO of 80-150 Hz the woofer boxes could be folded, put a cusion on top and you can have extra seating (or glass or a slab of rock & it becomes a couple tables to pile junk on.
dave
When i look at the drawings you posted they are not the same height.
I don't know what you are talking about, regarding the EL70 being in a separate enclosure.
I don't want to fold them since that makes it even worse. All i'd need is some way to raise them a little more off the floor (i do have some stone plates 4cm tall) so the EL70 gets to ear-height.
I don't know what you are talking about, regarding the EL70 being in a separate enclosure.
I don't want to fold them since that makes it even worse. All i'd need is some way to raise them a little more off the floor (i do have some stone plates 4cm tall) so the EL70 gets to ear-height.
Been a while since i drew that, you could put a single driver in half of the double one, or 2 drivers in twice the short one.
dave
dave