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Old 27th September 2013, 09:14 PM   #1051
Coen is offline Coen  Netherlands
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Quote:
Originally Posted by xrk971 View Post
the 4.1 mm xmax gave it away - an unusual figure that my brain happens to remember.
I've seen some earlier posts talking about the MA chr 70 but no-one tried them? dont suppose you did a sim? Any other intresting drivers that passed the review but didnt get tested?
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Old 27th September 2013, 11:32 PM   #1052
xrk971 is online now xrk971  United States
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I think someone has built it with chr70 but I can't remember who. I have run sims and it looks very good if I recall, similar to W4-1320. I will see if I can find it.
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Old 2nd October 2013, 10:34 PM   #1053
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don't suppose you managed to find it?
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Old 2nd October 2013, 11:30 PM   #1054
xrk971 is online now xrk971  United States
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Sorry, forgot all about it. I will look for it tonight.
X
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Old 3rd October 2013, 03:20 AM   #1055
xrk971 is online now xrk971  United States
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Default Cornu with W4-1320SIF

Here is the sim for the W4-1320SIF. Speaker is mounted on wall at 48 in above floor (centerline of driver). 27.55 in x 5.0 in deep.

SPL vs Freq.

Click the image to open in full size.

Impedance

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Cone Excursion

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Looks like it should work well.

good luck building it!

X
Attached Images
File Type: png Cornu-W4-1320SIF-Freq-1m.png (33.7 KB, 385 views)
File Type: png Cornu-W4-1320SIF-Impedance.png (13.2 KB, 385 views)
File Type: png Cornu-W4-1320SIF-Displ.png (13.2 KB, 385 views)
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Old 3rd October 2013, 03:25 AM   #1056
xrk971 is online now xrk971  United States
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Default Cornu with CHR 70.3

27.55 in x 5 in deep Cornu, 48 in above floor.

SPL

Click the image to open in full size.

Impedance

Click the image to open in full size.

Cone Excursion

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Attached Images
File Type: png Cornu-CHR70p3-Freq-1m.png (19.3 KB, 383 views)
File Type: png Cornu-CHR70p3-Impedance.png (13.0 KB, 382 views)
File Type: png Cornu-CHR70p3-Displ.png (13.2 KB, 382 views)
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Old 3rd October 2013, 03:36 PM   #1057
Coen is offline Coen  Netherlands
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Thanks x! Gonna order a pair as soon as i decide which it's gonna be choices.. choices..
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Old 3rd October 2013, 04:09 PM   #1058
xrk971 is online now xrk971  United States
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My vote is for the W4-1320sif as it has a more efficient high freq which will be needed to balance the bass amplification the horns provide. Although a simple 4 sided foam core front horn/waveguide that goes from 4x4 in to 10x10 in over 4 in depth will give you about 10 dB gain on the HF to balance. It looks funny though.
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Old 3rd October 2013, 06:36 PM   #1059
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I noticed, but the chr70 will cost me about $48 per driver while the tangband will cost $68 Not that i really mind, but the cheap foamcore drivers aren't that cheap anymore then I' ve seen the horns on the original cornus, anyone make one out of foam yet?
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Old 3rd October 2013, 08:59 PM   #1060
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You don't need an expensive driver to get a real kick out of these cabinets. That's one of the advantages I think. They make a mediocre driver sound that much better.
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