Anyone tried this driver? Looks pretty interesting. Screw on midrange 1" down to 500hz and possibly use WITHOUT a crossover???
What do you mean WITHOUT a crossover? If you run it open on the lower end, it will distort and burn.
Are you sure? I've run several compression drivers with no crossover at some pretty stinking high levels and have yet to ever damage a diaphragm. De250, de550 and TN750. Zero problems. Especially if you only listen at domestic levels.
That response is measured with a HL 14-25 Horn
Which is nice to include
otherwise your seeing the low end cut off created by the Horn.
So yes it would need a crossover.
But the bandwidth is relatively good to add a tweeter around 4 to 5 k
which is another benefit to reduce distortion found with typical 3 k crossover points.
Which is nice to include
otherwise your seeing the low end cut off created by the Horn.
So yes it would need a crossover.
But the bandwidth is relatively good to add a tweeter around 4 to 5 k
which is another benefit to reduce distortion found with typical 3 k crossover points.
Yes, I already ordered a couple to play around with. Found a silly cheap deal, $100 Canadian for two brand new, overstock. Perfect for the idea I had to try as part of a centre channel with the UHF in the middle. The horns I'd put them in have a 500hz cuttoff, thats why I was wondering about trying them without a crossover, would be interesting to have a "puritan fullrange midhorn". I'll be using a deqx anyways, so I will probably end up using a crossover but jthis is just for fun and experimentation. Was thinking about trying The Dayton super tweeter to see if there is any audible benefit of using a smaller voice coil for the tippy top frequencies. I will report back my findings 🖖
If I remember Selenium also has some impressive Super tweeters / AKA Bullet type
for price range/ performance.
Could possible have a all Selenium rig
Ironically I found the selenium bullets looking for similar idea.
Tweeter to match with a midrange horn from about 5 to 6k onward
slight benefit since the bullet includes the driver and horn as one unit.
likewise I liked a reasonable reference that Selenium datasheets include.
which include measurements with specific horns and stated horn model numbers
for price range/ performance.
Could possible have a all Selenium rig
Ironically I found the selenium bullets looking for similar idea.
Tweeter to match with a midrange horn from about 5 to 6k onward
slight benefit since the bullet includes the driver and horn as one unit.
likewise I liked a reasonable reference that Selenium datasheets include.
which include measurements with specific horns and stated horn model numbers
Thanks for the suggestion. Those look like worthy contenders! In this case however my goal is perfectly match the directivity of the highs and mids. Because both the drivers are screw'ons I can use the same horns for all three fronts. I'm playing around with an OPSODIS setup where the UHF's come front dead center ahead and then mids about 30 degrees to the side and them 500hz below at around 60 degrees. Its for a more immersive soundstage.
Here's the horn. Pretty good deal from CHina. I like the frequency response of these
Here's a measurement in room with a DE250 in it.
Here's a measurement in room with a DE250 in it.
Interesting
Just a Quick play around with the D200 impedance curve/frd with the HL 14-25 Horn
and the ST200 Bullet
They work, no pad needed with the bullet with such midrange output on the mid.
different story with woofer of course.
As with some horns the impedance curve can be a roller coaster.
I was able to get it to behave.
But the impedance compensation networks included, almost mandatory
to make it friendly
2nd orders on mid 3rd order on bullet
around 680 Hz and 4K crossing points
Just a Quick play around with the D200 impedance curve/frd with the HL 14-25 Horn
and the ST200 Bullet
They work, no pad needed with the bullet with such midrange output on the mid.
different story with woofer of course.
As with some horns the impedance curve can be a roller coaster.
I was able to get it to behave.
But the impedance compensation networks included, almost mandatory
to make it friendly
2nd orders on mid 3rd order on bullet
around 680 Hz and 4K crossing points
Looks like a pretty sweet combo! I wonder how much better the dispersion is on a bullet tweeter than using a larger horn. Also, on a sidenote, I havent ever made any of my own passive crossover yet, Are there any advantages you can think of versus just straight active? I do use a passive lpad though which lowers the hiss to signal ratio (great for compression drivers).
https://www.diyaudio.com/community/...per-scripts-and-m200-fun.385493/#post-7009215
I wonder if this compression driver would work in this application as a MEH driver?
I wonder if this compression driver would work in this application as a MEH driver?
Active makes adjustment easier to do by ear or measurements.
When it comes to woofer/ subwoofer combining.
I would say active is a better choice
Since Ported cabs have a wild impedance curve down low
and can be difficult to design.
Likewise high power inductors are rather costly.
I used combination of active / passive for a simpler lower
cost rack unit. needing only a " 2 way" crossover
but essentially have a 3 way or 4 way system
From sub to midbass is active.
Mid and tweeter is passive so it just plugs in to a simple
2 way crossover.
Of course for Subwoofer active is almost mandatory.
Agan wild impedance curves at 60 to 80 hz and also a active high order filter
is used to keep the Sub from over excursion
Aka subsonic / over excursion filter.
4th or 6th order highpass set approx 7 to 12 Hz
below the tuning of the reflex vent.
or lower passband of a horn
As mentioned with some passive networks designed wrong
you can get horrible impedance dips below 4 ohms.
Even in this simple model, I had to use friendly crossover points.
And also use impedance compensation to keep away dips.
AKA overheat amps easily with 3 ohm or lower dips
this case the compensation kept the curve friendly and was needed
for flattest response.
Would be interesting to see off-axis measurements.
The biggest issue with these horns is the screw-on throat, which is a tube section.
When you mount a regular (bolt-on) driver by using an adapter you basically end up with 2 throat sections, a source of waist-banding.
Paul Spencer measured the 10" (Dayton) with Selenium D220Ti (screw-on) and the resulting polar response isn't to be sniffed at.
The same horn with B&C DE250:
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