T/S Parameter unknown

[muhy3]

Hi,

I'm designing a 2-way speaker and WinISD is asking me for a "Pe" value (W), I assumed that the value is the power of the driver however when I enter 110W the vent calculations are astronomical (unrealistic and cannot fit inside the enclosure).

Could somebody tell me what Pe is and how I could work it out from the specs (I am using Peerless 850488). Thank you!

[Rimband]

Hello muhy3, I found your Peerless driver on the Parts Express website, and it gives 110 watts RMS/155 watts max. I'll paste the link here;

http://www.partsexpress.com/pe/pshow...=297-642&DID=7

This link also has a .PDF spec sheet for your driver, just click on the "Specifications" tab in the link. Good luck and hope this helps!

Joe

[madinoz]

Pe as you know is the stated power handling in watts RMS.
Obviously Winisd has been configured to try to keep the speed of the air in the port at a very low speed, which results in very large and long port recommendations. Try putting in a more sensible figure ( I would very rarely listen to my stereo at more than 20 watt RMS).
Or ignore the rec' port size and recalculate using another programme.

[muhy3]

Thank you, I had the information already I just wasn't sure if Pe was referring to the power, I did more searching through yahoo and found a website which explained the term 'Pe'.

Thank you for the prompt and helpful reply though.

[rabbitz]

When you are done mucking around in WinISD see how close you are to the Peerless recommended sizes.

http://www.wagner.net.au/pae/peerles...uggestions.doc

Great driver BTW.

[madinoz]

Rabbitz, I can certainly agree with you on the quality of this driver.

[muhy3]

madinoz/rabbitz have you both used this driver, or heard it before? because I will be using it in a 2-way vented enclosure. I worked out 8L 72.69Hz vent diam: 50mm, length: 100mm which works out both in dimentions that I would like and available size port since mucking around with pvc as I did with the subwoofer is too much of a hassle. I dont mind that the tuning is high because I made a subwoofer that will rock anybody's world.... peerless 12" xls.

None the less, thank you for the advice, this forum is very informative and helpful. :-)

[rabbitz]

muhy3

I've done a few speakers with this driver and it's shielded cousin the 850528. Very well behaved, easy to do crossovers for, sounds excellent and had a better bass performance than I expected.

The best performance I got was in 11.3 litre, Fb=65Hz, 58 dia x 120 port (Jaycar CX2688), F3=65Hz. Also did one with a 50.8 dia port x 88 from PVC pipe. Had a small peak at 70Hz but added a bit of extra warmth.

Well this driver's got 2 votes, madinoz and me.

Cheers