L1 is a no go as shown. What I also see a problem with is you are padding the woofers with a 2.7 ohm resistor.
This is not really highpassing the widerange, so I'll allow R2/C2. You are attenuating your bass though.
Being I said C1 can't be used without R1 or L1 in the original laid out example, that is a no. Being I said no highpasses out front, that also scrubs that. John's skids by because he has R1 present in parallel with C1. This means that the RC is tilting up the response inherent, and he is padding his woofers and lower range over all via the contour. He just needs to fix his L1 tilt-coil issue.
On this.... is the 5.6uf yanking down top freq's not allowed? Not really sure need it as need to do some off axis measurements.
edit: think I could just place that in front of both for similar effect
Yeah, the 5.6uF is across the out of bounds line for theme entry. You could move it out front, but I think a small coil or LR out front will work more efficiently at rolling off the top end.
Thanks for asking.
I've noticed when crank up the volume that bass kind of flattens out, portions of treble run up - almost like compression sound, sure I may be mis characterizing what i am hearing. Wondering if that from IMD. Thought about purposely letting bass xover run higher and put a notch around 150-200hz to pull the on purpose stretched bass response to be pulled down while also relieving the full range of some 100-250 hz bass causing imd. Was hoping the sealed conical chamber toughen up the low note handling. I call this ghetto engineering heh. But I also need to pull these out into larger room to get better feel for bass behavior as I have tendency to over bass the response at my lower listening levels due to mid-near field listening.
Looks like you simplified it a bit, John, and what I think I see is okay. Honestly, an honor system is applied to a point, but bringing a schematic should suffice.
@Wolf said:
I should have the room-block link posted to the website sometime this afternoon. Rates are 115/124, and need to be done before 4/9/25 or pay a higher room rate if you stay at the Hampton. Ask for DIY Speaker Builders block if calling by phone.
Do you have a code for one of these boxes for the special hotel rate?
While this thread is specifically about the theme, I thought I'd offer two suggestions for the general event...
(1) It would be cool to do some kind of AB comparisons for an hour Friday afternoon. Not much time to prepare something complex but there are so many things discussed on the forums where the audibility is questionable. Ideas?
(2) Door prizes. When I first started attending DIY events and had hardly any drivers, I loved winning a door prize that I could use. People tend to bring some stuff for the For Sale table in the back and even some give-a-ways. I'm going to go through my shelves and try to find something fairly nice to donate as a door prize. Not $10 tweeters but also not Purifi woofers. I'd encourage anyone else with a big stash of stuff to do the same. Might be better than those Secret Santa events at work.
Also, I am out of tent cards this year, so someone else will need to provide those. Sorry!
B&C Group is going to be a sponsor this year. Mike, Geoff, and (name eludes me at the moment) will plan on attending.
Beston has already sent me something for the table as well.
Since covid, we've not actively sought out sponsors, and they have still been coming to me without doing the legwork.
I had thought about including switches to AB on the Hancocks what I've been hearing, but could not find an easy way to implement them.
I can bring several speaker wires and see what shakes out with the switcher? I have that able to do 3 pair.
Tents? Bill and John have brought them before. Anybody want to pick these up, please?
Comments
L1 is a no go as shown. What I also see a problem with is you are padding the woofers with a 2.7 ohm resistor.
This is not really highpassing the widerange, so I'll allow R2/C2. You are attenuating your bass though.
InDIYana Event Website
Ok I was lazy. But L-1 in a notch would be OK from what I saw you approved previously?
L1 has to be out front of the divide. No contours after are allowed.
InDIYana Event Website
An overall series cap can't be used? Or just not recommended?
Being I said C1 can't be used without R1 or L1 in the original laid out example, that is a no. Being I said no highpasses out front, that also scrubs that. John's skids by because he has R1 present in parallel with C1. This means that the RC is tilting up the response inherent, and he is padding his woofers and lower range over all via the contour. He just needs to fix his L1 tilt-coil issue.
InDIYana Event Website
Good thing I wasn't planning to use a series cap then
On this.... is the 5.6uf yanking down top freq's not allowed? Not really sure need it as need to do some off axis measurements.
edit: think I could just place that in front of both for similar effect
Yeah, the 5.6uF is across the out of bounds line for theme entry. You could move it out front, but I think a small coil or LR out front will work more efficiently at rolling off the top end.
Thanks for asking.
InDIYana Event Website
Do these have to have a .5 woofer?
The essence of the project is the woofers rolloff and the widerange does not, making the system a 1.5way.
InDIYana Event Website
I've noticed when crank up the volume that bass kind of flattens out, portions of treble run up - almost like compression sound, sure I may be mis characterizing what i am hearing. Wondering if that from IMD. Thought about purposely letting bass xover run higher and put a notch around 150-200hz to pull the on purpose stretched bass response to be pulled down while also relieving the full range of some 100-250 hz bass causing imd. Was hoping the sealed conical chamber toughen up the low note handling. I call this ghetto engineering heh. But I also need to pull these out into larger room to get better feel for bass behavior as I have tendency to over bass the response at my lower listening levels due to mid-near field listening.
IMO the big rooms at the meetups tend to swallow up the bass anyway.
Depends where you sit, but generally I agree.
My compromised design is getting a compromised crossover, but it's going to look pretty.
Unfortunately I found out the 8" Rival woofer I'm using has better full range FR than the WB I'm using. 🤦🏻♂️
Do you need to see the cross over?
Looks like you simplified it a bit, John, and what I think I see is okay. Honestly, an honor system is applied to a point, but bringing a schematic should suffice.
InDIYana Event Website
Do you have a code for one of these boxes for the special hotel rate?
Thanks, David.
No code. Use the link on the event website, or call them directly and ask for the "DIY Speaker Builder" discounted block rate.
InDIYana Event Website
Just a heads up, I normally stay next door at the Comfort Inn because it was cheaper than the block rate. This year it's not @ $120.
@jr@mac what airport do you fly into?
Usually O'Hare
As it happens, that is indeed what I plan to do. Horn load a Dayton Audio RS100. But that's not all. ...
Hmmmm. Omni? Did someone say omni? Something along the lines of Hegemon I, perhaps, which I brought to InDIYana in 2021?
Ah, yup, got it, used the link, room booked, just need a finished speaker now...
Wife and I will be arriving evening of the 8th.
Cool, looking forward to it...
InDIYana Event Website
While this thread is specifically about the theme, I thought I'd offer two suggestions for the general event...
(1) It would be cool to do some kind of AB comparisons for an hour Friday afternoon. Not much time to prepare something complex but there are so many things discussed on the forums where the audibility is questionable. Ideas?
(2) Door prizes. When I first started attending DIY events and had hardly any drivers, I loved winning a door prize that I could use. People tend to bring some stuff for the For Sale table in the back and even some give-a-ways. I'm going to go through my shelves and try to find something fairly nice to donate as a door prize. Not $10 tweeters but also not Purifi woofers. I'd encourage anyone else with a big stash of stuff to do the same. Might be better than those Secret Santa events at work.
Also, I am out of tent cards this year, so someone else will need to provide those. Sorry!
B&C Group is going to be a sponsor this year. Mike, Geoff, and (name eludes me at the moment) will plan on attending.
Beston has already sent me something for the table as well.
Since covid, we've not actively sought out sponsors, and they have still been coming to me without doing the legwork.
I had thought about including switches to AB on the Hancocks what I've been hearing, but could not find an easy way to implement them.
I can bring several speaker wires and see what shakes out with the switcher? I have that able to do 3 pair.
Tents? Bill and John have brought them before. Anybody want to pick these up, please?
InDIYana Event Website
I think Bill is still planning on attending. He and I both demo'd our theme entries in Iowa this past fall.