@Dirk said:
The C5+R3 coil bypass is interesting. Trying to intuit what it does, and it's not clicking. I'd love to see a trace of the mid's raw & filtered response.
@Dirk said:
The C5+R3 coil bypass is interesting. Trying to intuit what it does, and it's not clicking. I'd love to see a trace of the mid's raw & filtered response.
That rolls off the effect of the coil for higher frequencies - lifts the top end of the midrange
But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
@Dirk said:
The C5+R3 coil bypass is interesting. Trying to intuit what it does, and it's not clicking. I'd love to see a trace of the mid's raw & filtered response.
That rolls off the effect of the coil for higher frequencies - lifts the top end of the midrange
@Dirk said:
The C5+R3 coil bypass is interesting. Trying to intuit what it does, and it's not clicking. I'd love to see a trace of the mid's raw & filtered response.
That rolls off the effect of the coil for higher frequencies - lifts the top end of the midrange
Not exactly.
oh shit, I messed up again...
But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
@Dirk said:
The C5+R3 coil bypass is interesting. Trying to intuit what it does, and it's not clicking. I'd love to see a trace of the mid's raw & filtered response.
I think C5+R3 ll L3 create a bottomless tank to kill the breakup peak.
@Dirk said:
The C5+R3 coil bypass is interesting. Trying to intuit what it does, and it's not clicking. I'd love to see a trace of the mid's raw & filtered response.
@Dirk said:
The C5+R3 coil bypass is interesting. Trying to intuit what it does, and it's not clicking. I'd love to see a trace of the mid's raw & filtered response.
That is an elliptical notch, it'll tank a specific frequency range and then roll off the filter effect above that point.
= Howard Stark: "This is the key to the future. I'm limited by the technology of my time, but one day you'll figure this out."
@DrewsBrews said:
Wouldn't "bottomless" be with no resistance? Or does that refer to something else?.
I call these elliptical tanks 'infinite notches'. Series notches i call 'bottomless traps' like a hole freqs fall into without a bottom. I've seen the tanks called the bottomless before, but it doesn't make sense to me either.
This is a slightly revised XO using exact values available from JF sans the 75uF capacitor. It models and measures slightly better with the 75 than the 68. There is also a 0.45 instead of 0.47 in the midrange circuit.
I have both on hand and will probably use the Apexjr in this crossover.
Price is about break even between the two options after figuring in the minimum order amount plus shipping from Steve over at Apex. Arguably better cap from Steve but I have never measured one of those red ones that was anywhere near out of spec, so there is that.
@DrewsBrews said:
My lazy side would have taken over on the mid enclosure and just spanned it to the sides of the main enclosure. Seeing it nested like you guys did it is pretty satisfying to look at though And I'm sure there were reasons for doing it that way.
Honestly, I wanted to use as little interior space as I could. It also looks cool.
I think I will get these soldered up on Sunday perhaps. Have family here all weekend - probably best to spend time with them instead of hiding in my utility room. I mean, they make me want to hide in there from time to time, but...
Hope everyone who celebrates had a wonderful thanksgiving!
So they will definitely get soldered up and measured tomorrow morning at some point, depending when the 'rents take off. They have a seven hour drive (five hours normally - my mother has serious back problems so has to get out and walk around periodically. She had every vertebrae fused from her neck to her tailbone. You should see that X-ray! They use titanium wedges between the vertebrae and essentially use titanium self tappers that go through the wedges into the vertebrae) so will be leaving early in the morning.
@ugly_woofer said:
It's funny how the medical field uses standard hardware that's titanium or ss along with regular power tools, that are sterile and sealed
They even use plain old red Matco toolboxes in the operating room I was in.
Modeling indicates going from 75uF to 80uF has minimal impact on reverse null and overall response, so here is a schematic that can use all off-the-shelf items from JF Components:
Comments
Just tanks the breakup a bit.
That rolls off the effect of the coil for higher frequencies - lifts the top end of the midrange
Not exactly.
oh shit, I messed up again...
I think C5+R3 ll L3 create a bottomless tank to kill the breakup peak.
Wouldn't "bottomless" be with no resistance? Or does that refer to something else?.
That is an elliptical notch, it'll tank a specific frequency range and then roll off the filter effect above that point.
I call these elliptical tanks 'infinite notches'. Series notches i call 'bottomless traps' like a hole freqs fall into without a bottom. I've seen the tanks called the bottomless before, but it doesn't make sense to me either.
InDIYana Event Website
This is a slightly revised XO using exact values available from JF sans the 75uF capacitor. It models and measures slightly better with the 75 than the 68. There is also a 0.45 instead of 0.47 in the midrange circuit.
Two options for the 75uF:
https://www.aliexpress.us/item/2251832772474882.html?spm=a2g0o.order_list.order_list_main.5.7d611802V8bWQD&gatewayAdapt=glo2usa
https://www.apexjr.com/
I have both on hand and will probably use the Apexjr in this crossover.
Price is about break even between the two options after figuring in the minimum order amount plus shipping from Steve over at Apex. Arguably better cap from Steve but I have never measured one of those red ones that was anywhere near out of spec, so there is that.
Midrange on left and T/W on right.
Honestly, I wanted to use as little interior space as I could. It also looks cool.
I think crossover component counts should only include reactive components. That would be my rule if I were an important person.
I think I will get these soldered up on Sunday perhaps. Have family here all weekend - probably best to spend time with them instead of hiding in my utility room. I mean, they make me want to hide in there from time to time, but...
Hope everyone who celebrates had a wonderful thanksgiving!
So they will definitely get soldered up and measured tomorrow morning at some point, depending when the 'rents take off. They have a seven hour drive (five hours normally - my mother has serious back problems so has to get out and walk around periodically. She had every vertebrae fused from her neck to her tailbone. You should see that X-ray! They use titanium wedges between the vertebrae and essentially use titanium self tappers that go through the wedges into the vertebrae) so will be leaving early in the morning.
Yikes! (to your mom's back)
It's funny how the medical field uses standard hardware that's titanium or ss along with regular power tools, that are sterile and sealed
They even use plain old red Matco toolboxes in the operating room I was in.
Up early today, getting a jumpstart on the crossover soldering. My kids 23rd birthday today, so not sure I'll get them all knocked together or not.
Time flies , tell her happy birthday for me.
Will do so, brother.
Playing nice.
Nice bass out of these 6.5".
Nice form factor as well.
I understand getting the tweeter up to ear level , but really like the looks of the mid sized tower.
JR. If you can move that area rug about 18" to the right, I will sleep better tonight. TIA.
Modeling indicates going from 75uF to 80uF has minimal impact on reverse null and overall response, so here is a schematic that can use all off-the-shelf items from JF Components:
Finished the write-up for these. This is another write-up intended for the builder, not the designer.