fake speakers?

Ryanschmidt224 · 2nd May 2011, 04:14 AM

so i dismantled a pair of polk monitors built in '87 and the bottom 2 "speakers" were just cones. There was no magnet, no wires, no nothing, just a shell of a speaker. The crossover wasn't even wired for those 2 extra ports. I found them in my parents storage. They said the bought them from a store when they were new... is there some reason for this im unaware of? or did some sleezy salesman rip them off?

c2cthomas · 2nd May 2011, 04:17 AM

Are those passive radiators? Need to know the model number to make a determination. It very well could be that is the way they are supposed to be.

Godzilla · 2nd May 2011, 04:18 AM

OMG! Were there any other drivers in the cabinet? Was there a tweeter with any wires going to it? WTF!

Unless those cones were passive radiators???

Sonusthree · 2nd May 2011, 04:18 AM

Probably passive radiators: Unpowered and designed to resonate at particular frequencies a bit like a bass port but implemented differently.

Passive radiator (speaker) - Wikipedia, the free encyclopedia

Ryanschmidt224 · 2nd May 2011, 04:33 AM

so I looked up passive radiator and those are definitely passive radiators. Im surprised there is enough pressure inside that box to run those. The tower has 2 - 5" and a tweeter and 2 of the passive radiators.
Thanks, I was shocked when i saw that.

TerryO · 2nd May 2011, 04:36 AM

Quote:

Originally Posted by Ryanschmidt224

so I looked up passive radiator and those are definitely passive radiators. Im surprised there is enough pressure inside that box to run those. The tower has 2 - 5" and a tweeter and 2 of the passive radiators.
Thanks, I was shocked when i saw that.

Shocked?
Wait until you come across a passive tweeter!

Just kidding.

Best Regards,
TerryO

Ryanschmidt224 · 2nd May 2011, 04:46 AM

ha! the first thing i did was call my dad and ask him if he had bought the speakers out of a big white van

c2cthomas · 2nd May 2011, 04:50 AM

Quote:

Originally Posted by Ryanschmidt224

Thanks, I was shocked when i saw that.

No worries there - the passive radiators won't actually shock you at all - I promise!!!

planet10 · 2nd May 2011, 04:56 AM

Passive radiators are used where the required bass reflex tuning is such that a port is not practical.

At the time, this was one of Polk's hgher end models.

dave

Jay · 2nd May 2011, 06:57 AM

Quote:

Originally Posted by TerryO

Shocked?
Wait until you come across a passive tweeter!

My friend couldn't believe when was told that there was no driver on the passive radiator (Polk Audio) he was staring at. He had to open the radiator to proof it.

Last night my other friend told me that he has found a unique piano. He was shocked that he couldn't find the speakers!

2nd May 2011, 04:14 AM	#1
Ryanschmidt224 diyAudio Member Join Date: Apr 2011	fake speakers? so i dismantled a pair of polk monitors built in '87 and the bottom 2 "speakers" were just cones. There was no magnet, no wires, no nothing, just a shell of a speaker. The crossover wasn't even wired for those 2 extra ports. I found them in my parents storage. They said the bought them from a store when they were new... is there some reason for this im unaware of? or did some sleezy salesman rip them off?

2nd May 2011, 04:17 AM	#2
c2cthomas 49 - for the 16th time diyAudio Member Join Date: Oct 2006 Location: Near "Music City" (Nashville Tennessee)	Are those passive radiators? Need to know the model number to make a determination. It very well could be that is the way they are supposed to be. __________________ "You can't always get what you want" K. Richards/M. Jagger *** "Next time I will know some things better" Zen Mod

2nd May 2011, 04:18 AM	#3
Godzilla diyAudio Member Join Date: Nov 2005 Location: New York	OMG! Were there any other drivers in the cabinet? Was there a tweeter with any wires going to it? WTF! Unless those cones were passive radiators??? __________________ www.zillaaudio.com/bib/bib.asp www.ZillaAudio.com

2nd May 2011, 04:18 AM	#4
Sonusthree diyAudio Member Join Date: Dec 2005 Location: Brighton,UK	Probably passive radiators: Unpowered and designed to resonate at particular frequencies a bit like a bass port but implemented differently. Passive radiator (speaker) - Wikipedia, the free encyclopedia __________________ Martin + + =

2nd May 2011, 04:56 AM	#9
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Passive radiators are used where the required bass reflex tuning is such that a port is not practical. At the time, this was one of Polk's hgher end models. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA


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2nd May 2011, 04:33 AM	#5
Ryanschmidt224 diyAudio Member Join Date: Apr 2011	so I looked up passive radiator and those are definitely passive radiators. Im surprised there is enough pressure inside that box to run those. The tower has 2 - 5" and a tweeter and 2 of the passive radiators. Thanks, I was shocked when i saw that.

2nd May 2011, 04:46 AM	#7
Ryanschmidt224 diyAudio Member Join Date: Apr 2011	ha! the first thing i did was call my dad and ask him if he had bought the speakers out of a big white van

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