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David@FrankHarvey's picture
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RE: I have no idea why you keep

moonfly wrote:
I have compared any subs. I said that a pair of 12" cones do not equal an 18, and provided the numbers that show an 18 will have roughly 25% more area than a pair of 12's. Nothing is being twisted, thats just how you choose to interpret what I post, for what ever your reasons are.

It's not a case of interpretation, it's a case of two statements that don't really go together. You have always spoken of subs in terms of driver size. One of the statements proves that, and the other is in complete contrast.

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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RE: I have no idea why you keep

moonfly wrote:
I dont understand the jump from cone area to amplification now, but yes, I have always maintained the importance of good amplification. I built a push pull sub, and yes I powered the drivers in series and parallel, though only from seperate channels of the same amp, which isnt the same as using two amps, but then do the amps in kens new subs share a common power source, because if they do its pretty much the same thing.

I'm talking about a subwoofer as a whole, not basing assumptions purely on driver size.

 

Quote:
I havent heard the new subs, and I would love to because my eyes and ears are always open. I would be surprised if they did anything I wouldnt expect, but you never know. Ive never questioned their design, or Kens ability, but it seems that all you want me to post is glowing rhetoric and nothing else.

Why would I try and get you to say good things without hearing it? And yes, you would be surprised. Don't make the mistake of thinking of it in terms of an MX350 performance wise. This outperforms the MX5100SF, and the difference compared to an MX350 isn't even funny.

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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RE: I have no idea why you keep

FrankHarveyHiFi wrote:

moonfly wrote:
At the point of contact the rool surround does move the same speed as the driver, decreasing as the surround moves away from the driver cone. The roll surround only form part of the suspension, and doesnt really add any weight to the driver. Kippel testing already covered all these aspects so feel free to look that up in your own time.

Anything within the outer gasket will add mass to the cone. Including the resistance of the roll surround. Feel free to ask your mentor.

I am well aware a roll surround has a resistance factor, this is accounted for in a drivers parameters, and should know that by now. I dont know where your trying to go here. I mention cone area, and you have moved oned amplifiers, roll surrounds, and keep bringing performance up, and I dont know why you would do that unless you feel the need to pick up on those points. You seem to advocate smaller roll surrounds over large, is this because of the resistance factor, because the difference between a large and small roll surround is negligable, and even more so when compared to the spider(s) and mass of the cone and VC assembly. Are you saying smaller drivers are advantageous purely on the roll surround issue? 

 

I'll be honest, you seem to just repeat what your told and I'm not convinced you have researched the field from all angles. 

 

FrankHarveyHiFi wrote:

moonfly wrote:
I have compared any subs. I said that a pair of 12" cones do not equal an 18, and provided the numbers that show an 18 will have roughly 25% more area than a pair of 12's. Nothing is being twisted, thats just how you choose to interpret what I post, for what ever your reasons are.

It's not a case of interpretation, it's a case of two statements that don't really go together. You have always spoken of subs in terms of driver size. One of the statements proves that, and the other is in complete contrast.

What two statements? I made one on cone area size, and another on cone size itself telling you next to nothing without additional data. Those two comments are in harmony with each other, dont you understand why?

 

FrankHarveyHiFi wrote:

moonfly wrote:
I dont understand the jump from cone area to amplification now, but yes, I have always maintained the importance of good amplification. I built a push pull sub, and yes I powered the drivers in series and parallel, though only from seperate channels of the same amp, which isnt the same as using two amps, but then do the amps in kens new subs share a common power source, because if they do its pretty much the same thing.

I'm talking about a subwoofer as a whole, not basing assumptions purely on driver size.

 

Quote:
I havent heard the new subs, and I would love to because my eyes and ears are always open. I would be surprised if they did anything I wouldnt expect, but you never know. Ive never questioned their design, or Kens ability, but it seems that all you want me to post is glowing rhetoric and nothing else.

Why would I try and get you to say good things without hearing it? And yes, you would be surprised. Don't make the mistake of thinking of it in terms of an MX350 performance wise. This outperforms the MX5100SF, and the difference compared to an MX350 isn't even funny.

When have I ever made any assumptions on any subwoofer, I never have. My comment on driver sizes are in relation to that particular aspect of sub design on the whole. You repeatedly appear to have the opinion larger drivers arent necessary, arent superior, and perform negatively against smaller drivers. This isnt the case, but again that comes at the caveat that any comparisons are made on and even keel, you must compare like for like, which many marketing statements either dont, or withold enough information for the uninitiated to not spot the deliberately witheld required finer detail.

As for performance, Ive made no mistake of judging anything. Before the new KK subs came out I built my own dual driver PP sub using 12 inch drivers because the old MX series did not perform upto the standard I wanted. That sub used high end drivers and 2000 watts of power and destroyed the old MK stuff. Unless Ken has made a boo boo, which I simply cannot accept, then why wouldnt his new subs do the same? I also built a dual driver push pull sub of identical design using the same model but 15" drivers, and it outperformed the 12 no question, though the margins are much closer in this kind of scenario. I think your issue is you probably havent had the chance to experience some of the subs I have, and you cast doubt on my knowledge and experience, thats you perogative. I offered to demo you some subs I built, installed and setup, but your always 'too busy'.

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RE: I have no idea why you keep

moonfly wrote:
I'll be honest, you seem to just repeat what your told and I'm not convinced you have researched the field from all angles.

Im not repeating what I'm told, it's just common sense when you know how a driver works. 


moonfly wrote:
What two statements? I made one on cone area size, and another on cone size itself telling you next to nothing without additional data. Those two comments are in harmony with each other, dont you understand why?

The two statements you made that I quoted earlier and pointed out to you.

 

moonfly wrote:
I'm talking about a subwoofer as a whole, not basing assumptions purely on driver size.

But your first statement on this thread was stating that dual 12's can't compete with an 18 - that is making assumptions based on driver size. You do this on AVF too. as has been said, any issue with the published statement, take it up with Ken.

 

Quote:
When have I ever made any assumptions on any subwoofer, I never have. My comment on driver sizes are in relation to that particular aspect of sub design on the whole. You repeatedly appear to have the opinion larger drivers arent necessary, arent superior, and perform negatively against smaller drivers.

You did earlier! If someone said to you that they have a dual 12 that beats an 18, you would tell them that wasn't possible. As far as driver size is concerned, I will always recommend 12" drivers as a minimum, unless the user just can't have a large sub for whatever reason. 8's and 10's just aren't up to scratch, in my opinion and experience.

 

Quote:
I think your issue is you probably havent had the chance to experience some of the subs I have, and you cast doubt on my knowledge and experience, thats you perogative. I offered to demo you some subs I built, installed and setup, but your always 'too busy'.

I don't need to hear what you have built. If your knowledge was so great and these subs were so good, you'd have your own company building and selling them, and other sub companies would be quaking in their boots. This isn't the case. Anyone can build a sub (if they have the time and patience) that will go loud and deep, but the sub is unacceptably large for the average household, and it is rather time consuming - most people work and have families to spend time with. My experience is with subwoofers built by companies that specialise (and sometimes not) in building subwoofers, and are available via retail premises.

My idea of a good subwoofer isn't one that is the size of a wardrobe and goes down to 1Hz. It is one that is a manageable size, reaches 20Hz easily, and can reach 10Hz. That's impressive enough as many subs out there can't manage that (the majority will do 30Hz fine but then tail off before it even reaches 20Hz). Also, it needs to be 'invisible' - again, very few subs can manage this. As I now own the DXD12012, I have no interest in changing it, and if I ever want to upgrade, I'll buy a second one. If you can show me a similarly sized sub that can outperform the DXD12012, and can retain the strong points of its design, I'll be very interested.

 

This is as far as this conversation is going. This is my free time and I'm not spending it going round in circles, which frequently used to happen with you over on AVF. And yes, I am very busy. 

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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RE: I have no idea why you keep

FrankHarveyHiFi wrote:

This is as far as this conversation is going. This is my free time and I'm not spending it going round in circles, And yes, I am very busy. 

you've chosen to be :type: on your free time. If you're not happy with this then wait till you are back at shop and then :type: during your shop working hours

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RE: I have no idea why you keep

MUSICRAFT wrote:
FrankHarveyHiFi wrote:
This is as far as this conversation is going. This is my free time and I'm not spending it going round in circles, And yes, I am very busy. 

you've chosen to be :type: on your free time. If you're not happy with this then wait till you are back at shop and then :type: during your shop working hours

Yes sir!!

The point I was making is that when I spend my own free time on here, which I do very frequently, I'd rather be helping people than arguing the toss in an argument that will go nowhere.

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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RE: I have no idea why you keep

FrankHarveyHiFi wrote:

MUSICRAFT wrote:
FrankHarveyHiFi wrote:
This is as far as this conversation is going. This is my free time and I'm not spending it going round in circles, And yes, I am very busy. 

you've chosen to be :type: on your free time. If you're not happy with this then wait till you are back at shop and then :type: during your shop working hours

Yes sir!!

The point I was making is that when I spend my own free time on here, which I do very frequently, I'd rather be helping people than arguing the toss in an argument that will go nowhere.

well then stop making it out that you're doing members and guests a favour by :type: on your free time

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RE: I have no idea why you keep

This one of mine is post number 83, if I've added up correctly. The last post that the OP wrote was number 39, I believe. I don't know if he is even following this thread any more, or if indeed he has actually bought something.

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RE: I have no idea why you keep

MUSICRAFT wrote:
well then stop making it out that you're doing members and guests a favour by :type: on your free time

Do you even read what you type?!  :doh:

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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RE: I have no idea why you keep

FrankHarveyHiFi wrote:

moonfly wrote:
I'll be honest, you seem to just repeat what your told and I'm not convinced you have researched the field from all angles.

Im not repeating what I'm told, it's just common sense when you know how a driver works. 


moonfly wrote:
What two statements? I made one on cone area size, and another on cone size itself telling you next to nothing without additional data. Those two comments are in harmony with each other, dont you understand why?

The two statements you made that I quoted earlier and pointed out to you.

 

moonfly wrote:
I'm talking about a subwoofer as a whole, not basing assumptions purely on driver size.

But your first statement on this thread was stating that dual 12's can't compete with an 18 - that is making assumptions based on driver size. You do this on AVF too. as has been said, any issue with the published statement, take it up with Ken.

 

Quote:
When have I ever made any assumptions on any subwoofer, I never have. My comment on driver sizes are in relation to that particular aspect of sub design on the whole. You repeatedly appear to have the opinion larger drivers arent necessary, arent superior, and perform negatively against smaller drivers.

You did earlier! If someone said to you that they have a dual 12 that beats an 18, you would tell them that wasn't possible. As far as driver size is concerned, I will always recommend 12" drivers as a minimum, unless the user just can't have a large sub for whatever reason. 8's and 10's just aren't up to scratch, in my opinion and experience.

 

Quote:
I think your issue is you probably havent had the chance to experience some of the subs I have, and you cast doubt on my knowledge and experience, thats you perogative. I offered to demo you some subs I built, installed and setup, but your always 'too busy'.

I don't need to hear what you have built. If your knowledge was so great and these subs were so good, you'd have your own company building and selling them, and other sub companies would be quaking in their boots. This isn't the case. Anyone can build a sub (if they have the time and patience) that will go loud and deep, but the sub is unacceptably large for the average household, and it is rather time consuming - most people work and have families to spend time with. My experience is with subwoofers built by companies that specialise (and sometimes not) in building subwoofers, and are available via retail premises.

My idea of a good subwoofer isn't one that is the size of a wardrobe and goes down to 1Hz. It is one that is a manageable size, reaches 20Hz easily, and can reach 10Hz. That's impressive enough as many subs out there can't manage that (the majority will do 30Hz fine but then tail off before it even reaches 20Hz). Also, it needs to be 'invisible' - again, very few subs can manage this. As I now own the DXD12012, I have no interest in changing it, and if I ever want to upgrade, I'll buy a second one. If you can show me a similarly sized sub that can outperform the DXD12012, and can retain the strong points of its design, I'll be very interested.

 

This is as far as this conversation is going. This is my free time and I'm not spending it going round in circles, which frequently used to happen with you over on AVF. And yes, I am very busy. 

Well that sums you up nicely I think. You obviously have utter contempt for me because i dare to keep a reality check on everything. You say you dont need to hear one of my subs, yet, constantly highlight the fact I havent yet heard a KK sub. Hypocracy?

I made no comment on the performance of kens sub, only spoke of cone area, yet you spool of on a tangent just to try shoot me down as always. Your final paragraphs only highlight your contempt for me, but at least Ive invested the time to learn how to design and build subs properly and how they work from the ground up. You seem to think your above that and know it all anyway, so there's nothing to gain from discussing things with you

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RE: I have no idea why you keep

moonfly wrote:
Well that sums you up nicely I think. You obviously have utter contempt for me because i dare to keep a reality check on everything. You say you dont need to hear one of my subs, yet, constantly highlight the fact I havent yet heard a KK sub. Hypocracy?

Not really. I don't need to worry about DIY subs, DIY amplifiers, DIY speakers etc as I don't need to have an opinion on them. I have enough to take in and learn about with what I have access to. You are commenting in a thread about a product you've not heard though, and basing your comments on older products which are not representative.

 

Quote:
I made no comment on the performance of kens sub, only spoke of cone area, yet you spool of on a tangent just to try shoot me down as always. Your final paragraphs only highlight your contempt for me, but at least Ive invested the time to learn how to design and build subs properly and how they work from the ground up. You seem to think your above that and know it all anyway, so there's nothing to gain from discussing things with you

I'm not shooting you down at all. If I had the knowledge you claim to have, I'd be making subs commercially. Unfortunately, I don't have the time to mess about building subs, but if I did, it really wouldn't be of any benefit to my current position. There's plenty of proven theory out there to read and learn from, and plenty of it from your mentor, Ken Kreisel. 

As with other recent conversations on here, this is as far as I'm going. This is repetitive, boring, and pretty useless to everyone. My final word on this is that I would put the DXD12012 up against any commercially available sub in the UK under the £3k, maybe even £4k price point, and be pretty confident it'll hold it's own, regardless of the size of the drivers it uses. Those that take the time to hear one won't be disappointed. 

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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RE: I have no idea why you keep

I dont understand your attitude. Ive said nothing against the DXD, and made no comments on how it compares to other subs, of any diver size or cab size. I'll never disagree with opinion, and if you think the DXD is the best sub at x price point I wont argue with you. Ive already more or less given up posting on AVF to appease so I'm not sure what else you want from me.

The point stil remains. A statement saying a pair of 12s can equal an 18 in cone area is incorrect. The implication is that the DXD is superior to any sub using an 18 inch driver, which in turn has value for money implications. This is a misleading statement pure and simple and I have highlighted this fact, and explained why in support.

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Bloody headers!!

Just as in AVF, you can't just drop things can you? To settle it (seeing as you won't take it up with Ken directly) I'll email him and ask him to explain his statement for you shall I? Until then, just drop it!

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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RE: Bloody headers!!

FrankHarveyHiFi wrote:

you can't just drop things can you?

 

ROFL Hypocrisy alert!

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RE: Bloody headers!!

Spin it any way you like Ben, I'm done.

DavidF @FrankHarveyHiFi, Coventry.

"Long is the way, and hard, that out of hell leads up to light"

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