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Always Dreamin Big
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2,300 Posts
THey do work, but have a very low (3db per octave) roll-off. What this means is that they let a lot of lower frequencies through. Most amps use a 12 or 18 db per octave roll off. I ran a set of 200 hz ones on my dash speakers in my old truck. Worked good, but they aren't the greatest crossovers (stopped my 4x6's from buzzing on bass hits though).
 

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oLoL10S
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536 Posts
Discussion Starter #7
u got pics of them if so how much and how many of them?

Tim
 

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327 Posts
Here is a blurb from Crutchfield's bass blocker page:

For smaller speakers (3-1/2"s, 4"x6"s, 4"s), the 600 Hz Bass Blockers work well with low-powered systems, while the 800 Hz Blockers are a better choice for high-power applications.

Speaker Size Cut-off Frequency

6-1/2", 5"x7"/6"x8" — 150 Hz
5", 5-1/4" — 300 Hz
3-1/2", 4", 4"x6" — 600 Hz (low power)
3-1/2", 4", 4"x6" — 800 Hz (high power)

I needed a pair for my Rockford Fosgate dash speakers, so I took the info that I needed to two different Radio Shacks. The first one looked but couldn't find anything like I needed and the second one sighed and said they used to sell stuff like that but don't anymore. ~get with it RS!~
I ended up buying on Ebay for $11.49 including shipping from this guy:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3062175755&category=14931
The 600 Hz blockers work great. They do exactly what I wanted them to do.
Just make sure you know what cut-off frequency you want before you buy!
 
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