Reply to thread

Message

<blockquote data-quote="mrogowski" data-source="post: 4439232" data-attributes="member: 569061">Hi Nick,Yes, I remember the Adire paper - all too well.&nbsp; Please keep in mind that this paper&#039;s focus is entirely on midrange drivers and was meant to show how the natural increase of inductance begins to act as a &#039;break (and of course the inaccurate characteristics of the added mass method)&quot; on impulse and frequency response.Now, let&#039;s apply this to the extremely narrow passband of a subwoofer.&nbsp; Some how, for some reason, the greater mass of DIYer&#039;s out there have concluded that whatever this paper states must also apply to subwoofer drivers as well.Yet, for some reason, there has not been any conclusive evidence supporting this.&nbsp; Yes, there are the Klippel tests performed on subwoofer drivers showing inductance values at various points of the driver&#039;s excursion.&nbsp; The DIYer&#039;s see these results, and if they are of high(er) value, they go &quot;Oh My God!&nbsp; It has high inductance!&nbsp; It must sound horrible!&nbsp; As a sub it must have terrible transient response.&quot;Do we know at what frequency this inductance is measured at?&nbsp; At the standard 1kHz reference frequency, the measurement is completely worthless.&nbsp; And you know why.Please note, this is not the usual ca.com pissing match - I am not replying to your post to try to &#039;up&#039; you, or anyone else.&nbsp; I see what I see, and this whole inductance thing with subs has gotten WAY out of hand.m</blockquote>

[QUOTE="mrogowski, post: 4439232, member: 569061"] Hi Nick, Yes, I remember the Adire paper - all too well. Please keep in mind that this paper's focus is entirely on [B]midrange drivers[/B] and was meant to show how the natural increase of inductance begins to act as a 'break (and of course the inaccurate characteristics of the added mass method)" on impulse and frequency response. Now, let's apply this to the extremely narrow passband of a subwoofer. Some how, for some reason, the greater mass of DIYer's out there have concluded that whatever this paper states must also apply to subwoofer drivers as well. Yet, for some reason, there has not been any conclusive evidence supporting this. Yes, there are the Klippel tests performed on subwoofer drivers showing inductance values at various points of the driver's excursion. The DIYer's see these results, and if they are of high(er) value, they go "Oh My God! It has high inductance! It must sound horrible! As a sub it must have terrible transient response." Do we know at what [B]frequency[/B] this inductance is measured at? At the standard 1kHz reference frequency, the measurement is completely worthless. And you know why. Please note, this is not the usual ca.com pissing match - I am not replying to your post to try to 'up' you, or anyone else. I see what I see, and this whole inductance thing with subs has gotten [B]WAY[/B] out of hand. m [/QUOTE]

Verification