Okay, so, I am sitting here trying to learn what physical attributes, relations and equations is used to determine cabinet volume. I have documents lined up that I need to go over, but I figured I would make a thread and possibly get some answers, the answer or a rewarding debate.
There exist online calculators, but I don't want to use that. I want to understand what goes into such decisions. So without adding any information, what say you: What are the references ?
Oneminde
There exist online calculators, but I don't want to use that. I want to understand what goes into such decisions. So without adding any information, what say you: What are the references ?
Oneminde
Okay, that is the fundamental info. How does one go about using this in a set of equations to calculate internal volume ?
Basically one is attempting to control and use the resonance of the driver by putting it in a resonant box to give the desired response
Okay lets look at that. My response is this and correct me if I am wrong.
"Fs coalign with the impedance peek. The impedance peek is when the driver demand most from the amplifier and massive amounts of current is dumped through the coil, but Fs is not when the driver produces the most SPL. Therefore, one can easily choose a virtual Fs before and after Fs when the impedance drop closer to the nominal impedance and avoid the cabinet resonance to occur at real driver Fs."
Am I close ????
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I can be nice and write you that list 🙂
Books:
- Loudspeaker Design Cookbook - Seventh Edition (Vance Dickason).
- High Performance Loudspeakers - Martin Colloms
- Loudspeakers: For Music Recording and Reproduction - Philip Newell and Keith Holland.
- The Complete Guide to High-End Audio - Robert Harley
PDF / Document:
- DESIGN OF AN OPTIMAL SPEAKER CABINET SIZE TO GIVE BEST RESPONSE, FOR A 50 WATT WOOFER.
- Measurements and models of musical articulation - KTH (Sweden)
- A Music Technology Thesis (MMP495)
- How to build to the limits of possibility - Steen A Duelund
- How to write (and read) audio specifications - Audio Precision
- A New Approach to Loudspeaker Measurements by Dave Login
- So You Want To Design A Speaker System For Your Bass
- Introduction to Loudspeakers and Enclosures - D. G. Meyer
- ACOUSTIC ANALYSIS OF LOUDSPEAKER CAVITY INCLUDING VISCOTHERMAL EFFECTS - Lund Universitet
- HOW TO DESIGN A SPEAKER by Steve Deckert
Thank you Oneminde. I was going to suggest to read the original Thiele and Small papers where you will probably find your answers. There is a member called richie00boy, find him through forum search and the files are available at his website.
I know resistance for AC is called impedance 🙂 but your question only pointed me towards impedance.
If it is not the impedance peek you are referring to, then I am a bit lost and here is why.
1. I don't desire a resonating cabinet aka passive amplification.
2. I don't desire reflected soundwaves to penetrate the cone/membrane.
3. I do not desire to push the driver to produce SPL at a region unsuited for this.
I know one can adjust or to an extent control the impedance curve via the filter, but this thread is not about filters. So, hmm ... do you have another hint ?
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Yeah I will get to Thiele and Small to cover it and if you want you can link the page you are referring to, unless, then I will search the forum - thanks
As impedance increases load decreases. This happens at the speaker's resonance, but although the load has decreased the driver's SPL remains approximately the same (due to it being at it's resonant frequency)
I wasn't hinting at such, I was asking you whether you thought a resonant enclosure was a good idea, apparently you don't 😉
Oh... you bastard ... 😀 - Yeah, no I don't want a resonating cabinet, but that has been taken care of. Its called: Decoupling 😉