2" full-ranger loaded in a large 2" horn?

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tommus

Member
Joined 2009
#1
Thinking about something cheap(ish) and easy for a domestic corner horn. Any thought on using a little full-ranger in a big horn?
These drivers below look like they might do OK. I would cross to a woofer at about 500Hz or as low as the 2" will play.

I just want some opinions if this is worth pursuing. Thanks.

Tang Band W2-2243S
https://www.parts-express.com/pedocs/specs/264-803--tang-band-w2-2243s-spec-sheet.pdf
Tang band W2-852SH
https://www.parts-express.com/pedocs/specs/264-808--tang-band-w2-852sh-spec-sheet.pdf
2" Throat Horn Bolt-On 18"x10"For Assorted Bolt On 2"Exit Drivers 90°x 40°
https://www.ebay.com/itm/231420420855?hash=item35e1bb62f7:g:E6gAAOSwhglTxvJm
 
#3
I've done similar with an Aurasound ns2 with a crossover about 400hz. Sounds great after a big blob of eq. No idea if its any better than it would sound on its own however. I believe getting a nice flush mounting from the driver to the horn mouth is quite important. Fun to try if you can eq and certainly cheaper than a low fs compression driver, but will never be as loud post eq.
 
#4
Looks like the Aurasound would be the way to go here with much higher Xmax and power handling compared to the drivers I was looking at. I have no problem with slathering on the EQ and I think the SPL would be adequate (thanks Chris for that info, I need to learn Hornresp)

danb11, Were you able to get a decent top octave out of the NS2?
 
#5
Absolutely, its all there. I was using Zoudio DSP amp. If memory serves I just had to smash down the 500-1000hz range, which limits the power available from this amp. And I needed to make a small baffle plate out of wood as the NS2 doesn't have much of a surround. It's not very sophisticated (not sure Hornresp will help that much in this kind of belt and braces approach), but fun and measures flat up to 20khz. I put mine in an enclosure, but thats not necessary IMO if crossed over around 4-500 hz. Quite nice to be able to discreetly tuck the horn away in the corner of the room or suchlike. I got the idea from another post someone using a JBL horn.
 
#7
tommus said:
danb11, Were you able to get a decent top octave out of the NS2?
Click to expand...

You will not get a great top octave out of any 2" driver. Even one octave lower will be a problem. Physics is working against you. You might be OK straight on, but at any angle there will be a significant phase difference between the left and right side of the driver membrane (or top and bottom for that matter). A mere 2.5cm path difference will result in large cancellation at ~7kHz. Of course, in a horn/waveguide it's not quite so simple as there is lots of multipath. But don't be surprised if you find the top end pretty ragged. And BTW - even though measurements might look not so nice, it might sound just fine.
 
#9
2 inch Monacor SPX-20M in 2380 horn at 60cm... Screenshot (3) 60cm.png
 
#10
More than just 10dB boost is that at normal listening levels of say 90dB, the cone only moves 40um and so distortion is non existent. Will make the sound very clear. Often passive EQ can be achieved with a simple 1st order cap to even out the initial broad peak. It will push the corner frequency up a bit.
 
#11
hweb said:
Physics is working against you.
Click to expand...
Yeah, ideally need a St < Sd throat with a phase plug and another problem I had way back when I doing mass quantities of these type horns to learn from is that for full size and larger throats ideally required high Qt drivers and to 'squeeze' the most out of a low Qt motor ideally required the rear chamber tuned to the mean of the horn's design BW, which too often meant not just sealing the basket, but the tedious/time consuming reduction of its internal volume, so being back before any inexpensive adjustable EQ was available, never pursued it further.
 
#12
xrk971 said:
More than just 10dB boost is that at normal listening levels of say 90dB, the cone only moves 40um and so distortion is non existent. Will make the sound very clear. Often passive EQ can be achieved with a simple 1st order cap to even out the initial broad peak. It will push the corner frequency up a bit.
Click to expand...
Above graph was knocked down 12db, x-over at 350Hz. I tried to boost treble above 7kHz, but the driver was not able to push through the horn. Bare driver, yes!
 
#13
I tried that with some 2" Sica speakers and also with my favourite 3FE22 on a 3D printed adapter. The Sica would work with the EQ as mentioned above. The larger driver lacked top end (as expected) and would need a tweeter horn. I have some unused 60x40 2" horns that will get used like this one day.
 
#14
Thats the one I saw; https://www.diyaudio.com/community/threads/2-madness-hornloading-the-tb-w2-803sm.205146/

I tried a 3fe22 in the 2" horn with an bluetac improvised throat adaptor. Great driver, but sounded awful. Too much to eq sensibly. The NS2 sounded good from get go, but measuring showed where to actively eq. It's probably just fixing problems the horn/driver combo has created. But fr measures good, sounds good (to me) and looks cool.
Tommus, let us know what you do with this (if anything).
 
#15
Have a look at my thread, I used only deductive EQ. It ought to give some insight what it could look like. The Monacor has a nice motor, low distortion and low Qts for such a driver. I had some 45 degree horizontal measure but have lost it, as I recall not much problems with in room measurements. What do stands out, is that the lower mids are excellent. I went down to 280Hz in one setting, with my listening levels, it was fine.



https://www.diyaudio.com/community/threads/more-horn-madness.354391/
 
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