Possible midranges for a 3-way speaker

[lsiberian]

Driver selection is complete. I realize it's a bit of a compromise and I appreciate the help I've gotten, but I can assure you this will be the best speaker I've ever heard when complete. I must give props to Mark, Andrew, and Chris for all the help they've provided. The driver list is as follows

Tweeter: HiVi RTI
http://www.madisound.com/catalog/product_info.php?cPath=45_229_236&products_id=1486. I'm getting a sweet deal on a 7 pack. Not sure if I can measure the distortion lol. But I guess I'll need to learn at some point.

Midrange: Dayton RS52
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=285-020
Chris suggested this route for cheapskates of which I am known to be.

Woofer: Exodus Anarchy
http://www.diycable.com/main/product_info.php?products_id=538
Fresh off the assembly line. Kevin is selling these at near cost and the T/S parameters are very promising.

 

[WmAx]

Driver selection is complete. I realize it's a bit of a compromise and I appreciate the help I've gotten, but I can assure you this will be the best speaker I've ever heard when complete. I must give props to Mark, Andrew, and Chris for all the help they've provided. The driver list is as follows

Tweeter: HiVi RTI
http://www.madisound.com/catalog/product_info.php?cPath=45_229_236&products_id=1486. I'm getting a sweet deal on a 7 pack. Not sure if I can measure the distortion lol. But I guess I'll need to learn at some point.

Midrange: Dayton RS52
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=285-020
Chris suggested this route for cheapskates of which I am known to be.

Woofer: Exodus Anarchy
http://www.diycable.com/main/product_info.php?products_id=538
Fresh off the assembly line. Kevin is selling these at near cost and the T/S parameters are very promising.

I recommend using two of the midbasses per cabinet. If you go ported, do allow for very large vent cross sectional area for these drivers. Cross the RTI at 5khz at the lowest. The RS52 can easily handle this frequency range for xover. Be sure to test each RT1's distortion profile before final use. I have found this driver to have a large percentage of defect units.

-Chris

 

[lsiberian]

I recommend using two of the midbasses per cabinet. If you go ported, do allow for very large vent cross sectional area for these drivers. Cross the RTI at 5khz at the lowest. The RS52 can easily handle this frequency range for xover. Be sure to test each RT1's distortion profile before final use. I have found this driver to have a large percentage of defect units.

-Chris

How would you suggest testing them. I honestly haven't done this type of test before. Would a mic setup with a distortion measuring software do the trick?

 

[WmAx]

How would you suggest testing them. I honestly haven't done this type of test before. Would a mic setup with a distortion measuring software do the trick?

You need an accurate measurement mic/setup, of course. You can use an old version of RMAA (I can provide to you - it's freeware - but current version is disabled compared to older version no longer on site for download) to do distortion analysis for this purpose.

-Chris

 

[lsiberian]

You need an accurate measurement mic/setup, of course. You can use an old version of RMAA (I can provide to you - it's freeware - but current version is disabled compared to older version no longer on site for download) to do distortion analysis for this purpose.

-Chris

That sounds fantastic. I've heard the ECM8000 is a good mic, but I'm not sure if it's got the range for a tweeter.

 

[WmAx]

That sounds fantastic. I've heard the ECM8000 is a good mic, but I'm not sure if it's got the range for a tweeter.

The ECM8000, 4 years ago, was a superb microphone for measurements; an unbeatable value. Today, however, it's not as good. The excellent Panasonic mic element that Behringer was using for the ECM was discontinued, from what I have been able to gather. The replacement element is simply not as good - and has substantial deviation in rersponse compared the genesis model.

Today I recommend the newly available Dayton measurement mic from Parts Express. Each unit comes with a unique calibration response chart and you can enter the serial number of your mic on partsexpress.com and download the data calibration file for use in your measurement software.

-Chris

 

[highfigh]

The ECM8000, 4 years ago, was a superb microphone for measurements; an unbeatable value. Today, however, it's not as good. The excellent Panasonic mic element that Behringer was using for the ECM was discontinued, from what I have been able to gather. The replacement element is simply not as good - and has substantial deviation in rersponse compared the genesis model.

Today I recommend the newly available Dayton measurement mic from Parts Express. Each unit comes with a unique calibration response chart and you can enter the serial number of your mic on partsexpress.com and download the data calibration file for use in your measurement software.

-Chris

Any idea of how much/consistent the deviation is? I bought one earlier this year and have been tweaking my speakers and room- the pink noise (using TrueRTA with 1/3 octave resolution) response is much flatter than I would have expected, although it responds in each band when I use the tone generators. It doesn't seem to have any HF or LF limitations using REW, either.