May 11, 2018  Loudspeakers are acoustic transducers that connect speaker drivers and electronic hardware components, in order to manage sound vibration and generate amplified audio signals. DOWNLOAD WinISD.

1) Find the T/S parameters for the driver you want to model, this is often on the manufacturer website somewhere. For example, here is the Fi Q15 from 2) install the latest WinISD (download from ) 3) open it and open the help 4) follow the instructions I'll reproduce that here for reference The suggested procedure for entering driver parameters is following (check first that 'Auto calculate unknowns' option is checked): 1. Enter Mms and Cms This gives fs. If either is not available, then enter fs and other parameter. Enter Sd, Bl and Re Now, you should get all but Qms (and Qts), Vas.

Please note that Vas may not match exactly what is specified by manufacturer, because exact value of Vas depends on environmental parameters. Enter Rms or Qms. Either one will do, although I tend to prefer Qms over Rms, because it can usually be measured in driver measurement procedures.

Enter Hc, Hg and Pe. Download detective conan the movie 13 sub indonesia one piece. If Hc or Hg or either is available, then enter Xmax and optionally either Hc or Hg if available. Enter number of voicecoils. This procedure is most accurate. Also note that it also calculates true SPL (1W/1m) value.

So it might not match the marketing SPL value, which is generally somewhat vague. Not in all cases, though.

Correct Znom, if necessary. If there are several voicecoils, then you must be careful when entering parameters in that case, because many manufacturers give Blin voice coils in series, because it yields double value for Bl against parallel connection. If driver manufacturer gives Qes, Bl and Cmsor Mms, then you can check how Bl is specified. For that, you can enter following parameters to calculate Re: Qes, Fs, Mms or Cmsand Bl. Connection mode can be changed by changing the combobox selection. The driver editor then converts Bl and Re values accordingly. Equivalently, you can check for Bl by entering: Qes, Fs, Mms or Cms and Re (for desired connection mode).

If you enter resistance for parallel connection and get about half of advertised Bl, then you know, that Bl was specified that way. Like in in project window, you'll probably noticed the driver icon in bottom of the driver editor window.

You can drag the driver object into some project by just dragging the icon. I just thought i would post this to help those to size enclosures and add to modeling drivers P.S I think a version of the eminence 15' and 18' drivers are used in the PSA subwoofers. How To Choose The Correct Speaker, The First Time, For The Box You Want To Build By Richard Ramsdell, Ramsdell Pro Audio Are you wanting to build a subwoofer? A high output mid bass cabinet? How about a full range PA box?

There are specific low frequency drivers for each of these needs. A speaker that is best for a subwoofer box would be a poor choice for a mid bass application.

A full range box will require a completely different speaker. Once you understand how to look at parameter values, you can use them to find the best component for your own particular need.

The first parameter to look at is the Qts. This particular parameter will show which category the speaker will be best for. Remember these are guidelines, and there are always exceptions. Usually you can go a little either way with your Qts values for each of these categories.40 and above. As you go higher in value above.40, your speaker will only have flat response in very large vented boxes or sealed boxes.40 to.50 will usually work well in a sealed, vented band pass box.

That is an enclosure with a sealed rear chamber and a vented front chamber. Usually the.45 to.55 area is best for this type of box.37 to.40. This category works well for larger subwoofer boxes where the box can go as low as possible, and it won’t be used above 80 to 100 Hz. These woofers tend to lack punchy mid bass detail but still respond quick enough in the low bass region.30 to.36.