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Ricci's Skhorn Subwoofer & Files

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Thanks again for the suggestion.  I am thinking along similar lines, though I do still need to be mindful of the round-overs.  I'm also keeping the bracing dividers to 12mm.  I'm trying to keep the weight down.

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13 hours ago, SME said:

Thanks again for the suggestion.  I am thinking along similar lines, though I do still need to be mindful of the round-overs.  I'm also keeping the bracing dividers to 12mm.  I'm trying to keep the weight down.

Are you talking about the SKHorn or a different project? I don't think flared ports are gonna save you from vent noise (below 20Hz) when running with the 1 vent per side config, and I also don't think that flared ports are needed when you're running with 2/3. I can push the drivers to Xmax at 20Hz with 1 vent open per side and not get any air noise.

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10 hours ago, peniku8 said:

Are you talking about the SKHorn or a different project? I don't think flared ports are gonna save you from vent noise (below 20Hz) when running with the 1 vent per side config, and I also don't think that flared ports are needed when you're running with 2/3. I can push the drivers to Xmax at 20Hz with 1 vent open per side and not get any air noise.

It's for a different project, a plain-vanilla vented cabinet.  I'll probably start a thread for it soon.  Either way though this discussion is relevant to the Skhorn.

Vent round-overs certainly won't prevent chuffing, but I believe there's evidence that round-overs can improve flow characteristics at moderately high velocity, perhaps allowing an extra 1-2 dB before chuffing does become noticeable or before compression becomes serious.  It's a minor detail but worth it IMO when vent area is a bit limited as it is with both the Skhorn and the design I'm working on.

Also, I care more about avoiding/reducing compression, which sets in quite a bit sooner, than I do about chuffing.  With compression, the spectral balance is distorted substantially as level is pushed higher.  In use-cases where high accuracy/SQ is important, this is likely not acceptable, which effectively limited usable output to a level that may be much less than when chuffing because audible.

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8 hours ago, SME said:

It's for a different project, a plain-vanilla vented cabinet.  I'll probably start a thread for it soon.  Either way though this discussion is relevant to the Skhorn.

Vent round-overs certainly won't prevent chuffing, but I believe there's evidence that round-overs can improve flow characteristics at moderately high velocity, perhaps allowing an extra 1-2 dB before chuffing does become noticeable or before compression becomes serious.  It's a minor detail but worth it IMO when vent area is a bit limited as it is with both the Skhorn and the design I'm working on.

Also, I care more about avoiding/reducing compression, which sets in quite a bit sooner, than I do about chuffing.  With compression, the spectral balance is distorted substantially as level is pushed higher.  In use-cases where high accuracy/SQ is important, this is likely not acceptable, which effectively limited usable output to a level that may be much less than when chuffing because audible.

Can't want to see what you're up to! When I think about the SKHorn I think about large venues with the capacity for over a thousand people, and there probably only the first two or three rows might notice vent noise. The roundovers are not much work thou, so why not just add them. I also placed roudovers on my current 12" project at vent entrance and exit, as far as it was possible for me. Very easy job with a roundover bit.

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Got the ok from @Ricci to post the metric SKHorn plans I made. It's a compact 4 pages and I built my cab with these.

I made the horn bracing from one piece as I found that to be less work, even without a CNC.

 

SKHorn Metric Drawings.pdf

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Here is the requested comparison, I included the 5 most prominent drivers for this cab. It already looks like a small mess, which is why I didn't include more.

 

Drivers.jpg.0444c795d209942de1ead04058332df4.jpg

 

 

1508245753_DriversMax.jpg.4147c2f83b1a07c1268eb9015c7c5785.jpg

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On 9/24/2019 at 11:41 AM, peniku8 said:

Here is the requested comparison, I included the 5 most prominent drivers for this cab. It already looks like a small mess, which is why I didn't include more.

 

Drivers.jpg.0444c795d209942de1ead04058332df4.jpg

 

 

1508245753_DriversMax.jpg.4147c2f83b1a07c1268eb9015c7c5785.jpg

Any chance you could throw the 18sound driver in there? 

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10 hours ago, klipsch said:

Any chance you could throw the 18sound driver in there? 

As for max output it's essentially the same as the DS or the LaVoce, but falls about 1db behind under excursion limit and is less than .5db ahead when power limited.

I'm unsure if the Leb of 0.001mH is correct @Riccinlw.jpg.2a26dcbb52e272b8c6316add6cfdb62b.jpg

 

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1 hour ago, peniku8 said:

As for max output it's essentially the same as the DS or the LaVoce, but falls about 1db behind under excursion limit and is less than .5db ahead when power limited.

I'm unsure if the Leb of 0.001mH is correct @Riccinlw.jpg.2a26dcbb52e272b8c6316add6cfdb62b.jpg

 

Thank you! 

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