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  Topic Review (Newest First)
08-31-10 10:45 AM
dusnoetos
Re: Need a replacement driver

Quote:
2leftthumbs wrote: View Post
word is that those are made by eminence

Eminence!! well that would be awesome. Well hopefully I will finely be able to find out in a few more days. yes I have been going the past few months with out a sub But thankfully my mains are able to pickup the slack very well.

I will keep you all informed. (still negotiating with the wife....but I think a compromise has been found)
08-30-10 08:02 PM
2leftthumbs
Re: Need a replacement driver

word is that those are made by eminence
06-04-10 03:07 PM
Mike P.
Re: Need a replacement driver

Here's the math for figuring out cone sag:

http://www.parts-express.com/resourc...nt-up-down.cfm

The sag should not exceed 5% of the Xmax.



06-04-10 01:12 PM
dusnoetos
Re: Need a replacement driver

Well Diapers has taken precedent over a new driver this week... but hopefully Parts express will still have some of the buyout sub next week.

ANY-FOR-WHO. Since the placement of the sub in my cabinet is down firing; could any one enlighten me on how to tell if a particular driver can be used down facing with out unwanted cone sag - hence would the buyout sub be fine in this orientation. The DC250-8 never gave me any noticeable problems in that orientation. and it was like that for about 6 years.

So I am sure some of you are wondering how my 2 year old daughter got easy access to the DC250-8... Well I had it on its front side with the amp pointing up in order to clean out the dust in the heat sink. I had to run to the toilet and when I came back Esther had - with the aide of a Philip's screwdriver - nearly ripped half the cone apart. Not even the rubber surround was salvageable. She even ripped the spider and had part of the voice coil unwound. (should of taken pictures before I ripped the magnet off and tossed the basket and cone away.) I was so shocked i did not even know weather to laugh or cry. I am so glad my family forced me to attend anger management classes years ago. In some way this is my fault because not even a weak ago I cut apart a dead driver to show a curious (NON-audiophile) friend how a speaker worked - of course Esther was watching. Monkey see, monkey do. (my daughter is the girl holding the kitten in my avatar picture)
06-03-10 03:15 PM
Mike P.
Re: Need a replacement driver

Quote:
Generic wrote: View Post
Does anyone know who's sub that is? I guess at $25, it doesn't really matter, but if anyone knows, please speak up. The reviews seem good, but I was wondering if it would work as a car sub.
P.E. might be able to tell you where it came from. Cabin gain would boost the low end in a car environment. As long as you're not looking fore a SPL monster the sub will handle 80 watts with a hi-pass filter at 20 hz.



06-03-10 03:11 PM
Mike P.
Re: Need a replacement driver

Quote:
How did you find the info about the amp????
I use the Wayback Machine which is an internet archive:

http://web.archive.org/web/*/http://...rtsexpress.com



06-03-10 01:52 PM
Generic
Re: Need a replacement driver

Does anyone know who's sub that is? I guess at $25, it doesn't really matter, but if anyone knows, please speak up. The reviews seem good, but I was wondering if it would work as a car sub.
06-03-10 08:43 AM
dusnoetos
Re: Need a replacement driver

How did you find the info about the amp???? I am very impressed. (do you have a stash of old PE catalogs? - I use to... but got rid of them during my last move.)

unless my wife totally veto's it... I will be buying the buyout sub this week.
06-03-10 02:34 AM
Mike P.
Re: Need a replacement driver

The amp is a 300-792, it was sold in 1999 as a 120 watt amp. It was later upgraded to a 150 watt amp. The specs say it has 6 db of boost at 30 hz.

http://www.parts-express.com/pe/psho...92&ctab=2#Tabs

This was the P.E. web page in 1999:

http://web.archive.org/web/200112111...ctGroup_ID=505

As before, yellow is the DC250-8, orange is the buyout. The boost has more of an effect on the buyout as it is a 4 ohm sub compared to the DC250-8 which is 8 ohms. Quite an improvement for a $25 sub.

Attachment 22087



06-03-10 01:47 AM
Mike P.
Re: Need a replacement driver

I'll try and find some info on the amp.

The modeling program is WinISD Pro, there's a tutorial on it here:

http://www.hometheatershack.com/foru...inisd-pro.html



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