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Pallas
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Posts: 5
Joined: Mon Feb 03, 2014 10:46 pm

Snell shallow woofer

Thu Jun 05, 2014 10:17 pm

Has anyone played with these? They look like they work well to upgrade the bass in my CT200h. Also, I plan on buying more socket-cap wood screws, so I need to find something else to fill out the order .:)

My main interest is whether they're motor limited (overload gracefully) or suspension limited (TC Sounds-style clank). They're David Smith-era designs so I assume the former, but one never knows.
 
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Wolf
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Re: Snell shallow woofer

Wed Jun 11, 2014 1:59 am

I believe you have that sorta-backwards. If the design is suspension limited, the coil will not be able to bottom at the backplate as the gap is long and deep enough in the motor to not allow it to bottom.

If it is Motor-limited, then the design only has enough Bl for a certain range of motion.

Then there is the mechanical limit or Xmech where the voice coil will bottom if the suspension allows it to move that far.

Welcome to the forum, Pallas,
Wolf
 
Pallas
Topic Author
Posts: 5
Joined: Mon Feb 03, 2014 10:46 pm

Re: Snell shallow woofer

Sat Jun 14, 2014 6:41 pm

Yeah, sorry, my wording was unclear though we're getting at the same thing. I probably should have written "is Xsus>Xmag or Xmag>Xsus?".

I was using "motor limited" to describe Xsus>Xmag, because the "limit" of the driver's excursion in that case is how far the motor can push it. The suspension still has room to move, but the motor cannot push it further.

I was using "suspension limited" to describe Xmag>Xsus, because the "limit" of the driver's excursion is the soft parts. The motor can push them beyond their limits.

But I can see how someone would take the same terms and see the opposite meaning in them.

At any rate, I generally prefer Xsus>Xmag, because I really don't like the sound of voicecoil formers banging against metal plates. That applies to any system, but goes more so in a hatchback.

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