Jump to content
Ricci

Ricci's Skhorn Subwoofer & Files

Recommended Posts

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.

Share this post


Link to post
Share on other sites
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.

Share this post


Link to post
Share on other sites
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.

Share this post


Link to post
Share on other sites
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.

Share this post


Link to post
Share on other sites

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

Share this post


Link to post
Share on other sites

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

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites
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? 

Share this post


Link to post
Share on other sites
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

 

Share this post


Link to post
Share on other sites
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! 

Share this post


Link to post
Share on other sites

@Ricci How would the K20 fare with 4 21DS115-8 in parallel on one channel? Impedance minima would be around 1.3 Ohm. I'm thinking about getting a K20, but if it's not performing well with that load I could also get a K10 and go for a 4 Ohm configuration. The difference between K20 and K10 is much less at 4 Ohm than at 2 Ohm.

Share this post


Link to post
Share on other sites
On 11/1/2019 at 6:24 PM, peniku8 said:

@Ricci How would the K20 fare with 4 21DS115-8 in parallel on one channel? Impedance minima would be around 1.3 Ohm. I'm thinking about getting a K20, but if it's not performing well with that load I could also get a K10 and go for a 4 Ohm configuration. The difference between K20 and K10 is much less at 4 Ohm than at 2 Ohm.

It depends. The K20 will run stereo at 2 ohms, but it will limit long bass notes into low impedances considerably. Buss pumping can be a problem. The exact impedance and phase of the load and the bass content used will determine how well it does. I really recommend bridging the K20 or K10. They perform better with heavy duty signals into low impedances when fully bridged. 

Share this post


Link to post
Share on other sites
8 minutes ago, Ricci said:

It depends. The K20 will run stereo at 2 ohms, but it will limit long bass notes into low impedances considerably. Buss pumping can be a problem. The exact impedance and phase of the load and the bass content used will determine how well it does. I really recommend bridging the K20 or K10. They perform better with heavy duty signals into low impedances when fully bridged. 

The plan would be a symmetric load anyways (8 drivers total), so bus pumping shouldn't be much of an issue. 4 drivers per channel on a K20 sounds like a good match to me. If that's not enough, doubling both would be the alternative. 16 of these drivers should be plenty for a lot of situations... X4L surely looks nice for that application, but since it's so new you hardly find it used anywhere.

Share this post


Link to post
Share on other sites

Question about (CNC) accuracy: when producing the hatch plate and the back panel, how much of a gap should I leave when I'm planning to coat all surfaces with Duratex? Would 1mm be enough?

Share this post


Link to post
Share on other sites

3mm or so undersized should work. Depends on how many coats of Duratex though. If coating both surfaces multiple times you may need a bit more. 

  • Thanks 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...