- believe JBL used a closed back Alpha6 midrange with this little waveguide - what else might work well for home use? (I have these waveguides)
update - picked a sealed back Eminence 630SS 6.5 with 30oz magnet - hope there's a relatively simple passive crossover solution and result good
JBL*6.5 Inch WaveGuide
update - picked a sealed back Eminence 630SS 6.5 with 30oz magnet - hope there's a relatively simple passive crossover solution and result good
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
JBL*6.5 Inch WaveGuide
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here's some quick data of 630SS laying on its back facing up at an overhead mic bare then with waveguide plus input Z for both conditions - I'm not sure if that notch would exist if it were mounted to a flat baffle
there was a lot of crappy wire from the amp - maybe an ohm's worth round trip
perhaps some xover savvy reader will give suggestions to starting network values and an impedance nulling circuit (if needed)
630SS bare vs waveguide frequency response
630SS bare vs waveguide imput impedance
there was a lot of crappy wire from the amp - maybe an ohm's worth round trip
perhaps some xover savvy reader will give suggestions to starting network values and an impedance nulling circuit (if needed)
630SS bare vs waveguide frequency response
630SS bare vs waveguide imput impedance
~2.9vrms/497Hz indoors - since I had no immediate way to hold the waveguide flange to the Eminence 6, I had to just
sit the waveguide on top - perhaps it would be somewhat different if firmly attached - no clothespins, or little C-clamps,
the WG's flange is a bit smaller than the driver's flange.
EV VMR rebuilt with new parts
630SS bare driver
630SS plus JBL waveguide sitting on top
sit the waveguide on top - perhaps it would be somewhat different if firmly attached - no clothespins, or little C-clamps,
the WG's flange is a bit smaller than the driver's flange.
EV VMR rebuilt with new parts
630SS bare driver
630SS plus JBL waveguide sitting on top
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here you go DJK - the trace with inductor was pretty much like no network on the bottom - no good
caps used were 25uF (thought it was 24uF) - 20uF and 12uF - what do you say? what needs to be done on the top of its range? I might run the little Peavey round APT80 size horn with RX14 on top
I want good dynamics for drum kit and vocals - although I like things like Fred Astaire's singing, it doesn't hurt
to have good peak ability - but am leery of hiss from dsp with high gains so at least for mid and top, want
a passive network for this toy
red trace Peavey RX14 on its little horn with just a cap
caps used were 25uF (thought it was 24uF) - 20uF and 12uF - what do you say? what needs to be done on the top of its range? I might run the little Peavey round APT80 size horn with RX14 on top
I want good dynamics for drum kit and vocals - although I like things like Fred Astaire's singing, it doesn't hurt
to have good peak ability - but am leery of hiss from dsp with high gains so at least for mid and top, want
a passive network for this toy
red trace Peavey RX14 on its little horn with just a cap
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here you go DJK - the trace with inductor was pretty much like no network on the bottom - no good
caps used were 25uF (thought it was 24uF) - 20uF and 12uF - what do you say? what needs to be done on the top of its range? I might run the little Peavey round APT80 size horn with RX14 on top
I want good dynamics for drum kit and vocals - although I like things like Fred Astaire's singing, it doesn't hurt
to have good peak ability - but am leery of hiss from dsp with high gains so at least for mid and top, want
a passive network for this toy
red trace Peavey RX14 on its little horn with just a cap
Fred,
This post answers so many questions; it's amazing ! Anything new to report ?
I have decided to try a 6.5 on this waveguide anyway. I re-read Bruce's
mid range horn article, and with both a chamfered ring/donut adapter to enlarge the throat (albeit rather abruptly) from 4 to 5.5 inches, and a gap introduced, I am looking forward to decent results.
hey Freddi! These are keepers - nice in horns 
2pcs RT4 4x4 SEALED Back Midrange | eBay
Only a 4" but really snappy on drums and nice vocals
http://www.ebay.com/itm/2pcs-RT4-4x4-Sealed-Back-Midrange-/350547360571?hash=item519e403b3b
2pcs RT4 4x4 SEALED Back Midrange | eBay Only a 4" but really snappy on drums and nice vocals
http://www.ebay.com/itm/2pcs-RT4-4x4-Sealed-Back-Midrange-/350547360571?hash=item519e403b3b
That coax really mucks up that little Peavey driver - that otherwise looks really good.
here you go DJK - the trace with inductor was pretty much like no network on the bottom - no good
caps used were 25uF (thought it was 24uF) - 20uF and 12uF - what do you say? what needs to be done on the top of its range? I might run the little Peavey round APT80 size horn with RX14 on top
I want good dynamics for drum kit and vocals - although I like things like Fred Astaire's singing, it doesn't hurt
to have good peak ability - but am leery of hiss from dsp with high gains so at least for mid and top, want
a passive network for this toy
red trace Peavey RX14 on its little horn with just a cap
I use eight of them in a conical horn for midrange in my big mono corner system. They will work in that tractrix fine. I don't have any advice on the capacitor for the JBL horn. If you get one and measure it in your horn you will find your answer.
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