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Author Topic: What does the inside of the K-Subs look like inside?  (Read 8708 times)

Kevin Richard

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What does the inside of the K-Subs look like inside?
« on: January 02, 2015, 03:32:56 PM »

I'd be interested in trying to make my own version of these.  Just curious how the design is on the inside?

I've seen pictures with the amp plate removed which shows that the 12's are just rear firing and that it's a 4th order band pass, so they fire into a sealed chamber I assume.

Anyone have any other insight?

I'm looking to make a small compact sub that can put out a fair amount of bass... it doesn't have to go TOO low.  I know that's the holy grail of subs and "size matters" (that's what she said!) but what is out there that CAN be done with say a couple of 12's vs an 18 or 21?
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Ivan Beaver

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Re: What does the inside of the K-Subs look like inside?
« Reply #1 on: January 02, 2015, 04:18:45 PM »

I'd be interested in trying to make my own version of these.  Just curious how the design is on the inside?

I've seen pictures with the amp plate removed which shows that the 12's are just rear firing and that it's a 4th order band pass, so they fire into a sealed chamber I assume.

Anyone have any other insight?

I'm looking to make a small compact sub that can put out a fair amount of bass... it doesn't have to go TOO low.  I know that's the holy grail of subs and "size matters" (that's what she said!) but what is out there that CAN be done with say a couple of 12's vs an 18 or 21?
You can get 12's to go quite low (below 20hz if you want), BUT there is a tradeoff.

Everything is a compromise.  And you compromise physical size vs low freq cutoff vs sensitivity.

You can't have all 3.  You have to set the parameters of what you will accept (design goals) THEN start working on a design to meet those goals.

Without the goals-how will you know if your design works?
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Ivan Beaver
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Paul G. OBrien

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Re: What does the inside of the K-Subs look like inside?
« Reply #2 on: January 02, 2015, 05:02:34 PM »

I'd be interested in trying to make my own version of these.  Just curious how the design is on the inside?

Just look up bandpass subs on the web and you'll get the basic idea. It won't do you any good to know exactly how the Ksub is built unless you happen to have drivers from a Ksub to use.. the chamber volumes needed are specific to the driver so if you have different drivers you will have to use different chamber sizes. And because of that you will want to model drivers first, not all are suitable to bandpass designs so this isn't a step you can skip.
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Mac Kerr

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Re: What does the inside of the K-Subs look like inside?
« Reply #3 on: January 02, 2015, 05:48:52 PM »

Without the goals-how will you know if your design works?

This is the key to every aspect of how we design sound systems. For every vague question asked on these forums the first response should almost always be "what are your goals". Without them there is no sensible answer.

Mac
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Ivan Beaver

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Re: What does the inside of the K-Subs look like inside?
« Reply #4 on: January 02, 2015, 06:11:57 PM »

This is the key to every aspect of how we design sound systems. For every vague question asked on these forums the first response should almost always be "what are your goals". Without them there is no sensible answer.

Mac
Hence the reason I ask so often "What are you trying to accomplish".

I know a lot of people don't like that-because it makes them think a little.

What they really want is a simple answer to a question that they have not properly asked.

This applies to everything from individual speaker design-to whole system design-to amps-to mixer and so forth.

Simple answers result in wrong answers :)
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Ivan Beaver
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Richard Turner

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Re: What does the inside of the K-Subs look like inside?
« Reply #5 on: January 02, 2015, 10:40:15 PM »

I would like something that is about a 24" cube and capable of producing dynamic low frequency tones solidly down to 25 hz in about 120000 cu ft of space but it has to be directional so as not to rumble anything on stage. If it had an on board anti gravity pack so it presents as a mass of under 5 kilos for transport that would be a bonus. I would pay a premium for it having a built in battery pack that would last for an entire weekend, or a fusion generator , either would work...

Am I asking too much?
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Steve M Smith

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Re: What does the inside of the K-Subs look like inside?
« Reply #6 on: January 03, 2015, 05:18:50 AM »

Am I asking too much?

No.  That all sounds reasonable.

It could also run a modified form of Tetris game software so it could load itself into the truck.


Steve.
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Ivan Beaver

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Re: What does the inside of the K-Subs look like inside?
« Reply #7 on: January 03, 2015, 08:20:40 AM »

I would like something that is about a 24" cube and capable of producing dynamic low frequency tones solidly down to 25 hz in about 120000 cu ft of space but it has to be directional so as not to rumble anything on stage. If it had an on board anti gravity pack so it presents as a mass of under 5 kilos for transport that would be a bonus. I would pay a premium for it having a built in battery pack that would last for an entire weekend, or a fusion generator , either would work...

Am I asking too much?
Not as long as you keep living in the fantasy world :)

All you have to do is "believe" and it WILL be true-at least in your mind--------------

At least that is the way some people go through life.
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Ivan Beaver
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Richard Turner

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Re: What does the inside of the K-Subs look like inside?
« Reply #8 on: January 03, 2015, 10:09:25 PM »

make it the 3d tetris game for the n64 and I will put down $100 for pre order of units 3 and 4, I will assume that through compound interest that should be enough to cover the cost by delivery date.
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Looking at retiring. Local PA market has shrank to 2 guys with guitars and bose l1 compacts or expecting full line array and 16 movers on stage for $300... no middle left going back to event DJ stuff, half the work for twice the pay.

Kevin Richard

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Re: What does the inside of the K-Subs look like inside?
« Reply #9 on: January 10, 2015, 05:01:21 PM »

You can get 12's to go quite low (below 20hz if you want), BUT there is a tradeoff.

Everything is a compromise.  And you compromise physical size vs low freq cutoff vs sensitivity.

You can't have all 3.  You have to set the parameters of what you will accept (design goals) THEN start working on a design to meet those goals.

Without the goals-how will you know if your design works?


Sorry, didn't mean to disappear on everyone.  I have it set to "notify" me but I don't think I got any emails.  I just decided to check and found all these replies.

Back on topic:

I would like something that is about a 24" cube and capable of producing dynamic low frequency tones solidly down to 25 hz in about 120000 cu ft of space but it has to be directional so as not to rumble anything on stage. If it had an on board anti gravity pack so it presents as a mass of under 5 kilos for transport that would be a bonus. I would pay a premium for it having a built in battery pack that would last for an entire weekend, or a fusion generator , either would work...

Am I asking too much?

That's about right.

Just kidding.

I would like something on the more compact side, I have a set of Behringer B312D's and a Presonus 16.0.2 and I do like literally 2-4 gigs a year.  The rest of the time they sit in my shed setup for me and my buddy to just play a little music with.  I have an electric drum kit and I'd like to add a little low end when doing that as well as when we play our backing tracks for our "karaoke" rock stuff that we do in the shed.

The gigs I do we don't even mic the backline.  It's just vocal mics and a keyboard from time to time.  I'm always waiting for the day that they want the backline mic'd as well. 

But mostly this is for me for fun.  If this was for serious, I would just buy some KSubs.
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Scott Holtzman

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Re: What does the inside of the K-Subs look like inside?
« Reply #10 on: January 10, 2015, 08:34:10 PM »


 If this was for serious, I would just buy some KSubs.

Guess everyone's definition of serious is different.  K-subs suck.  You can get B'stock KW-181's for the same price and they pass everyone's kick ass for the $$$ test.  DJ, Karokee or small live band gig the KW's are versatile and powerful.  To get better you have to spend three times as much.

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Scott AKA "Skyking" Holtzman

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Kevin Richard

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Re: What does the inside of the K-Subs look like inside?
« Reply #11 on: January 11, 2015, 12:02:30 PM »

Guess everyone's definition of serious is different.  K-subs suck.  You can get B'stock KW-181's for the same price and they pass everyone's kick ass for the $$$ test.  DJ, Karokee or small live band gig the KW's are versatile and powerful.  To get better you have to spend three times as much.

Great point!

Let me add, I like the KSub (and others) because the speakers are tucked away.

I don't load and unload my gear, so the better the protection from the factory on damage the better.

I know this seems silly, but it is what it is.
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Ivan Beaver

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Re: What does the inside of the K-Subs look like inside?
« Reply #12 on: January 11, 2015, 12:11:21 PM »




J.  I have an electric drum kit and I'd like to add a little low end when doing that as well as when we play our backing tracks for our "karaoke" rock stuff that we do in the shed.

The gigs I do we don't even mic the backline.  It's just vocal mics and a keyboard from time to time. 
I'm confused.

You say you have an electronic drum kit and you also say that only vocals and keyboard go through the PA.

Is this sub for the PA or for the drum kit only?
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
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Scott Holtzman

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Re: What does the inside of the K-Subs look like inside?
« Reply #13 on: January 11, 2015, 11:40:59 PM »

I'm confused.

You say you have an electronic drum kit and you also say that only vocals and keyboard go through the PA.

Is this sub for the PA or for the drum kit only?

Oh and the Danley TH-118 sucks even less!   The more money you spend the less suck factor (with the right people of course).
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Scott AKA "Skyking" Holtzman

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Mike Sokol

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Re: What does the inside of the K-Subs look like inside?
« Reply #14 on: March 07, 2015, 08:40:33 AM »

I would pay a premium for it having a built in battery pack that would last for an entire weekend, or a fusion generator , either would work...

A Mr. Fusion generator can be powered by stale beer. That could be a bonus.  ;)

ProSoundWeb Community

Re: What does the inside of the K-Subs look like inside?
« Reply #14 on: March 07, 2015, 08:40:33 AM »


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