Hi, regarding the sealed back midrange below:
https://www.precision-devices.com/products/all-products/pd-615n002/
Many of the T/S parameters are N/A, is there a way around this with the impedance chart? try to ask the manufacturer? Or is active the only option?
https://www.precision-devices.com/products/all-products/pd-615n002/
Many of the T/S parameters are N/A, is there a way around this with the impedance chart? try to ask the manufacturer? Or is active the only option?
The TSP's are not applicable as the sealed back means there's little that you can do in design terms that would be modellable with that info - you can't change box size, tuning etc.
Edit: If you were planning on designing a waveguide eg in Hornresp, that's about the only thing you would perhaps need them for; in which case yes, contacting the manufacturer would be your only option. /Edit
For getting your crossover designed, you already have the impedance curve, so tracing that and importing into your design software of choice should give you all the impedance info you need.
VituixCAD is what I prefer to use for playing around with crossover design, and it has a decent curve tracer in it already.
Here's what it gives for both frequency response and impedance traced from the manufacturer's graphs. Note that if you want to use that frequency response info you'll still need to add in the effects of bafflestep, which VituixCAD can also do for you.
Edit: If you were planning on designing a waveguide eg in Hornresp, that's about the only thing you would perhaps need them for; in which case yes, contacting the manufacturer would be your only option. /Edit
For getting your crossover designed, you already have the impedance curve, so tracing that and importing into your design software of choice should give you all the impedance info you need.
VituixCAD is what I prefer to use for playing around with crossover design, and it has a decent curve tracer in it already.
Here's what it gives for both frequency response and impedance traced from the manufacturer's graphs. Note that if you want to use that frequency response info you'll still need to add in the effects of bafflestep, which VituixCAD can also do for you.
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Great reply, I'm outside now but will have a look at this software later.
Planning to use this as a direct radiator filler driver to negate the need for a larger horn in a three way.
Planning to use this as a direct radiator filler driver to negate the need for a larger horn in a three way.
Of course, this is why we measure our drivers. OEM charts and even TS parameters are good for purchase decisions, but not always reliable for design.
So, are you asking what values to toss a Zobel on it. May not be needed depending on your crossover points and slope.
A .frd taken at 1mm is not how you use a driver, so I measure my drivers in a prototype box @ 1M.
So, are you asking what values to toss a Zobel on it. May not be needed depending on your crossover points and slope.
A .frd taken at 1mm is not how you use a driver, so I measure my drivers in a prototype box @ 1M.
Primarily getting rid of the impedance peak, considering high passing it at 700-800hz to 15 inchers.
If nothing can be done can I use its natural rolloff and high pass at 250 (which is past the peak) to limit excursion?
Note this is a sealed back driver, you cant measure this your usual way.
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