maybe a little waveguide from Diyaudiogroup - it could be used in a Karlson with a K-tube rolling in around 2k5 - probably be put to front speaker duty in a 5.1 bedroom system
Time to try your hand at a paraline?
Or maybe http://www.parts-express.com/dayton-audio-pt2c-8-planar-tweeter--275-085
Might could even work that closed back planar in as a coaxial...
Yeah the sens is only 94, but you might + series resistor the 8"
to raise the Q a little... Then maybe sens not so different...
Also consider B&C 8PE21 for a few dollars more.
http://www.parts-express.com/bc-8pe21-8-midrange-speaker--294-652
Same same with external resistor to raise Q, only more so.
Better than high Q from variable overhang of unshorted coils in a cheap motor.
You have no dispersion issues with Karlson, 8 can go higher, why cross so low?
Or maybe http://www.parts-express.com/dayton-audio-pt2c-8-planar-tweeter--275-085
Might could even work that closed back planar in as a coaxial...
Yeah the sens is only 94, but you might + series resistor the 8"
to raise the Q a little... Then maybe sens not so different...
Also consider B&C 8PE21 for a few dollars more.
http://www.parts-express.com/bc-8pe21-8-midrange-speaker--294-652
Same same with external resistor to raise Q, only more so.
Better than high Q from variable overhang of unshorted coils in a cheap motor.
You have no dispersion issues with Karlson, 8 can go higher, why cross so low?
Last edited:
strange bump at 400hz.
seems fine crossed at 2khz.
Maybe the round horn.
My only issue is the .22 qts with the 69hz Fs.
ohms look to be under 10 ohms till 1khz, so a resistor may help.
Even then, I'd imagine sealed F3 would be around 150hz.
seems fine crossed at 2khz.
Maybe the round horn.
My only issue is the .22 qts with the 69hz Fs.
ohms look to be under 10 ohms till 1khz, so a resistor may help.
Even then, I'd imagine sealed F3 would be around 150hz.
It's really not a woofer
hey guys,
I'm using a pair of these in my current incarnation. They are really great drivers,
but they are only what they are- fine for the middle mid-bass and lower to middle mid range.
Not for woofing, not for upper mid range. They do not have that BUMP
at 400, but yes, they have a broad band hump in the 500- 630 Hz area.
Could probably be used up to 2K with some very careful crossover tweaking.
At 2.5 K they are beginning to say, good-bye.
As far as for a woofer in a small 2-way, there are better choices. Once you get into the class of higher efficiency, though, usable bandwidth starts to diminish.
http://www.diyaudio.com/forums/mult...iency-8-inch-midrange-recommendations-10.html
hey guys,
I'm using a pair of these in my current incarnation. They are really great drivers,
but they are only what they are- fine for the middle mid-bass and lower to middle mid range.
Not for woofing, not for upper mid range. They do not have that BUMP
at 400, but yes, they have a broad band hump in the 500- 630 Hz area.
Could probably be used up to 2K with some very careful crossover tweaking.
At 2.5 K they are beginning to say, good-bye.
As far as for a woofer in a small 2-way, there are better choices. Once you get into the class of higher efficiency, though, usable bandwidth starts to diminish.
http://www.diyaudio.com/forums/mult...iency-8-inch-midrange-recommendations-10.html
Eminence says around a half cubic foot is a "large vented box"- there's plenty of vent area in their example.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square
--Box Parameters--
Vb = 0.5 cu.ft
V(total) = 0.575 cu.ft
Fb = 106 Hz
QL = 7
F3 = 100.2 Hz
Fill = normal
--Vents--
No. of Vents = 2
Vent shape = round
Vent ends = one flush
Dv = 3 in
Lv = 3.225 in
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square
--Box Parameters--
Vb = 0.5 cu.ft
V(total) = 0.575 cu.ft
Fb = 106 Hz
QL = 7
F3 = 100.2 Hz
Fill = normal
--Vents--
No. of Vents = 2
Vent shape = round
Vent ends = one flush
Dv = 3 in
Lv = 3.225 in
hi GM - yeah that could work and might leave enough room for a little waveguide at the top (?) - where would you put the driver and how to make a vent ? - be nice if it were like P10's Pensil vent instead of using a floor gap vent like Zu
Again, using HR's LW should tell you, though MJK recommends [L*0.349] down from inside top. The rule-of-thumb is to put the driver, vent at some odd harmonic, which as you can see is a bit shifted [0.349 Vs 0.333], though once damped I seriously doubt it would be obvious.
Unfortunately, HR doesn't allow any vent location except out the bottom, but if you put it at [L*0.8 - 0.857] you can't go wrong.
GM
Unfortunately, HR doesn't allow any vent location except out the bottom, but if you put it at [L*0.8 - 0.857] you can't go wrong.
GM
- Status
- Not open for further replies.