the system would be a small (L100 size) reflex with woofer to midrange having good poer handling and hopefully a clear midrange, I'm having a lot of pain issues but wrose, sision issues so cannot see my monitor well (looks washed out to the point that light graphs in hornresp disappear). FWI I gave a look at GRS12PT in Xsim w. Zobe l and not sure if its on-axis rise would be a problem or not summed to mid if xover is in the 350-500Hz region. MAdybe a 3r order for 12PT? - -notchi filter? - I've got to keep the thing cheap.
Also - would a cardboard tube T-line coming out the back be preferable with 6PT to sealed?
Anyhow - trown some values you would use for starters for the woofer and mid
The tweeter dould b a hor+CD, GRS dome or horn - or maybe my old CAT 37-8 if cn locate
Also - would a cardboard tube T-line coming out the back be preferable with 6PT to sealed?
Anyhow - trown some values you would use for starters for the woofer and mid
The tweeter dould b a hor+CD, GRS dome or horn - or maybe my old CAT 37-8 if cn locate
Good Idea
Was thinking of similar setup with same drivers.
Modern L100 very very slightly larger than
70's
Good form factor to make it all work.
Mainly straight forward everyday QB3
alignment for the woofer.
So slightly deeper to get the volume
needed.
likely large dome to make lower
crossover point for a 6.5 ish mid
behave well.
Will get to it
Normal stuff, ported woofer, sealed mid
tight center to center.
all good
Was thinking of similar setup with same drivers.
Modern L100 very very slightly larger than
70's
Good form factor to make it all work.
Mainly straight forward everyday QB3
alignment for the woofer.
So slightly deeper to get the volume
needed.
likely large dome to make lower
crossover point for a 6.5 ish mid
behave well.
Will get to it
Normal stuff, ported woofer, sealed mid
tight center to center.
all good
@WhiteDragon
bless you! - 1/4 of what you provided would have taken me years ! (more likely could never do it) Hopefully there will be some builds.
bless you! - 1/4 of what you provided would have taken me years ! (more likely could never do it) Hopefully there will be some builds.
thanks @picowallspeaker - I still had to upscale the large image to see (my vision is blurry). Is it ok I use Dayton laminated steel 3.5mH /0.39 ohm DCR inductors in place or he 3.3mH in the sim? - I doubt a problem distortion wise (?)
Also, how critical is the 100uH's DCR in the tweeter circuit? (I think Eayton's 100uH 18ga coil is aorund 0.14 ohm DCR)
Also, how critical is the 100uH's DCR in the tweeter circuit? (I think Eayton's 100uH 18ga coil is aorund 0.14 ohm DCR)
mmmh, same reasoning goes with the 3.3 mH coils, the one for LP ( series connection) for the woofer and the one in parallel in the HP for the midrange. Generally the shunting coils use a smaller section, so a higher gauge, but it depends on the power used.
So I was expeting a higher resistance in the coil used in midrange's HP, but it's less that the one used in the woofer.
So I was expeting a higher resistance in the coil used in midrange's HP, but it's less that the one used in the woofer.
@WhiteDragon I've made budget picks for a build with the neo Dayton Ti tweeter - - for the 0.12 ohm 0.56mH coil - a Dayton Perfect Layer 0.60mH coil with 0.38 ohm DCR. (can de-wind to 0.56 if needed - assuming windings are not heavily glued together). Also, I could de-wind the 3.5mH steel core chokes to 3.3mH - if matters.
If there is a GRS dome or horn tweeter which GRS would work well ? - and would the same 0.56mH mid inductor and 3rd order tweeter highpass work ok with it?
Also - how many liters would you give the GRS 2PT woofer? - where would you tube?
If there is a GRS dome or horn tweeter which GRS would work well ? - and would the same 0.56mH mid inductor and 3rd order tweeter highpass work ok with it?
Also - how many liters would you give the GRS 2PT woofer? - where would you tube?
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Hah knew you would ask about the horn.
Not many have frequency response data and baffle was little tight.
So used a the dome since I had files and quality is better than most would assume.
Use whatever coils fit your budget.
I usually role up the internal resistance in sim to meet smaller coils.
Looks like I forgot the mids/highs.
I usually always check the woofer as noticed.
I think I used a BB4 for sim ill check
Alignments. And post for volume.
Port location could be factory location, usually one large port.
Also lower corners could work. Be closer to walls/corners
so would actually need shorter lengths.
Ill make calculations.
Sounds like you figured out posted thumbnails.
Right click on screen and larger image opens.
You can scroll through all attachments once open.
little arrows on each side of screen. Or use keyboard
left/right arrows
Not many have frequency response data and baffle was little tight.
So used a the dome since I had files and quality is better than most would assume.
Use whatever coils fit your budget.
I usually role up the internal resistance in sim to meet smaller coils.
Looks like I forgot the mids/highs.
I usually always check the woofer as noticed.
I think I used a BB4 for sim ill check
Alignments. And post for volume.
Port location could be factory location, usually one large port.
Also lower corners could work. Be closer to walls/corners
so would actually need shorter lengths.
Ill make calculations.
Sounds like you figured out posted thumbnails.
Right click on screen and larger image opens.
You can scroll through all attachments once open.
little arrows on each side of screen. Or use keyboard
left/right arrows
I Use standard alignments, and wont tune more than 3 Hz
above a alignment.
Orange
QB3
3.3 cubic feet ( 93.4 liters) 36 Hz
red line shows 38 Hz higher tune
Blue
BB4
2.6 cubic feet ( 74.7 liters) 35 Hz
pink line shows 38 Hz higher tune
So as figured 2.6 cubic feet is feasible
tune 35 to 38 Hz
Assuming 18mm plywood (3/4)
box should be 380mm deep.
Enclosure be 2.86 cubic feet or 81 liters.
Of course larger so once mid box is in and driver/bracing
displacement net volume be 2.6 cubic feet for BB4
Same deal thumbnail, right click to enlarge
above a alignment.
Orange
QB3
3.3 cubic feet ( 93.4 liters) 36 Hz
red line shows 38 Hz higher tune
Blue
BB4
2.6 cubic feet ( 74.7 liters) 35 Hz
pink line shows 38 Hz higher tune
So as figured 2.6 cubic feet is feasible
tune 35 to 38 Hz
Assuming 18mm plywood (3/4)
box should be 380mm deep.
Enclosure be 2.86 cubic feet or 81 liters.
Of course larger so once mid box is in and driver/bracing
displacement net volume be 2.6 cubic feet for BB4
Same deal thumbnail, right click to enlarge
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There is a few PRV horns with good data and impedance.
I was going to do a Mid Horn / Treble Horn with 15" GRS woofer.
Another project in back of my head.
Always wanted to do a 3 way also with all direct
radiators and 12"
So when you posted the idea, thought perfect!
Great excuse to finally do it.
Mentioning the L100 form factor, even better.
$6.98 dome tweeter GRS - not shabby - what's your estimate for a ballpark highpass to go with the 6PT-12PT project?
https://www.parts-express.com/pedocs/specs/292-462--grs-1td1-8-spec-sheet.pdf
for horns I've 1.4" neo Beyma CD on a little 8"x8" horn with Lordsansui's "smallhorn3"
https://www.parts-express.com/pedocs/specs/292-462--grs-1td1-8-spec-sheet.pdf
for horns I've 1.4" neo Beyma CD on a little 8"x8" horn with Lordsansui's "smallhorn3"
ill just do a trace and work out the values, after sim the baffle.
easy enough.
Sensitivity is just barely enough should be no padding.
Be back with update.
Technically be a all GRS build at that point
LOL
was hoping youd say that.
Its pretty affordable
Metal dome has a certain amount of clarity.
plus its neo so easy to fit on the baffle.
Center to center gets larger with the larger faceplate of the GRS
but well noted.
I've seen the designers GRS but remember Fs around 3k
so was surprised to see a GRS with Fs down in 1100
Im checking my drawings now to see if it even fits the baffle.
was hoping youd say that.
Its pretty affordable
Metal dome has a certain amount of clarity.
plus its neo so easy to fit on the baffle.
Center to center gets larger with the larger faceplate of the GRS
but well noted.
I've seen the designers GRS but remember Fs around 3k
so was surprised to see a GRS with Fs down in 1100
Im checking my drawings now to see if it even fits the baffle.
sounds like a neo motor is needed to fit - - fs of 2400 on the "Designer" is crazy high. Dunno if the other way (~660) with large chamber is always good but can result in low Qtc. I'm used to decent 1" format compression drivers on K-tube and horn for treble - -CAT37-8 lacked air didn't seem to cut it compared to CD. A K-tube sticking out of an L100 would be an ugly sight indeed. A Mini klam lens might work but aesthetically would demand some symmetry. A small speker with mini klam lens could be good for ATMOS.
Here's a Peerless for ~$14 - its loud enough- on axis - Good reviews
https://www.parts-express.com/Peerless-BC25SC06-04-1-Textile-Dome-Tweeter-264-1028?quantity=1
https://www.parts-express.com/pedocs/specs/264-1028--tymphany-bc25sc06-04-spec-sheet.pdf
Here's a Peerless for ~$14 - its loud enough- on axis - Good reviews
https://www.parts-express.com/Peerless-BC25SC06-04-1-Textile-Dome-Tweeter-264-1028?quantity=1
https://www.parts-express.com/pedocs/specs/264-1028--tymphany-bc25sc06-04-spec-sheet.pdf
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