Decimeter is not a commonly used unit here in Canada, probably because it is easy to confuse with Decameter (100x larger). We have to learn both metric and imperial because we're officially a metric country, but share many things with the US. For example speed limits are in km/h, and milk comes in liters, but waist lines and pant length are displayed in inches.
Feet and inches aren't fun to do math with but they're actually very intuitive. A foot is approximately the length of a man's foot, so you can picture a cube under your foot.
There is more to consider than T/S parameters, especially if you are looking for dipole application as JinMTVT does.
Very important is the venting of the spider and voice coil structure. While TSPs will give some hints, they don´t really tell, how much (or not) a driver might chuff through a pole vent or to what extend missing openings behind the spider might lead to air compression.
Also consider that TSPs are defined for small signals only. So bad deviations from those specs might occur if the driver is pushed to Xmax.
Finally the cone quality is not measured by TSPs, but cone breakup could be judged roughly from FR and impedance diagrams (if their resolution allows!).
So in many cases you have to rely on recommendations from people here or you have to try for yourself.
After all, would you ever dare to buy a car from technical data only without ever having sat behind the steering wheel?
Very important is the venting of the spider and voice coil structure. While TSPs will give some hints, they don´t really tell, how much (or not) a driver might chuff through a pole vent or to what extend missing openings behind the spider might lead to air compression.
Also consider that TSPs are defined for small signals only. So bad deviations from those specs might occur if the driver is pushed to Xmax.
Finally the cone quality is not measured by TSPs, but cone breakup could be judged roughly from FR and impedance diagrams (if their resolution allows!).
So in many cases you have to rely on recommendations from people here or you have to try for yourself.
After all, would you ever dare to buy a car from technical data only without ever having sat behind the steering wheel?
A fair analogy.
A few don't but a lot more do. They don't care about what happens under that peak horsepower number, the braggng rights are what's presented in bold type.
Funny thing though, when not asked to deliver the extreme, a Golf is probably better suited to your daily grind than a 911 is.
Svante said:
Hi,
Hmm.... well one way of looking at it is a cubic box to fit a 12" driver.
Which would be a 34cm cube assuming 20mm walls.
Another is 1 cuft is ball park cabinet volume to reflex a hi-fi 8" driver.
Cuft help me visualise cabinet size, but I still convert to litres when
thinking about T/S parameters - cuft seems alien when certain T/S
parameters are always metric, e.g. cone mass.
🙂/sreten.
- Status
- Not open for further replies.