Question 1

Does this crossover work only with 6" and 6 1/2" speakers (as said)?  what does the speaker size have to do with blocking certain frequencies?

Accepted Answer

No it will 'work' with any speaker size.  The size of the speaker has more to do with the amount of air it can move and, generally, the amount power it can handle (all things being equal).  Typically, a larger speaker has more cone area than a small speaker and can move more air--thus can respond more faithfully to lower frequencies.  For example, it's typical to see 6.5" respond within a -3 db limit down to 60 hertz.  A 3.5" speaker typically responds down to ~ 120 hertz within those same limits. Also, typically, the power handling capabilities of a speaker has more to do with the voice coil's ability to disappate heat (power).  The voice coil is that little round thing in the middle of your speaker glued to the cone in the center, extending into the magnet structure, and covered by a dust cap.  Dome drivers (typically tweeters) are driven by a voice coil around the perimeter of the dome.  The bigger the voice coil, typically, the better it can disappate heat (power).  Larger drivers can have larger voice coils (but they don't HAVE to).The reason you would buy a capacitor is you are limiting the lowest frequencies that can pass to your speaker through 'capacitance'.  By limiting the lower frequencies, you can effectively reduce the amount of energy (power) the speaker's voice coil can receive, and protect it from overheating (blowing).  The different capacitance values expressed in microfarads (uF) change the frequency at which the speaker received signal (power).  But a capacitor can only roll-off that power at 6db per octave.  So if I bought a capacitor for a 600hz crossover point, it would be 6 decibels down at 300 hertz, 12 decibels down at 150 hertz, etc.The sellers labeling of the capacitor as for 6.5", 5.5", 4" or 3.5" speakers is based on typicalness for size, power handling, and frequency response for the respective speaker....not any precise science.  Also be sure to note the impedance (expressed in ohms) of the speaker and the capacitor's crossover point at that impedance meet your needs.  Typically, car speakers between 3.5 and 6.75" are 4 ohms, but can be as low as 2 ohms, and as high as 8 ohms.  Hope this is helpful!

Question 2

Can these handle 100watts ? I have a separate sub , so I want only light mids and highs for my door speakers

Accepted Answer

I would say yes. The wires coming off of them are a pretty thick gauge.

Question 3

Could I use theses with jl c2-350x speakers on a jk with a jl amp and kenwood headunit?

Accepted Answer

what you would need would be the bass blockers designed for the 3.5" speakers.

Question 4

Does anyone know if there is a rated power these can handle, im thinking of using these on an amplifier that has about 250 watts @ 4 ohms, bass wise

Accepted Answer

These bass blockers are designed for a speaker application . Manufacturer specs these at 50 watts RMS.

ASIN	B009D9IGIM
Antenna Location	For Smartphones or Tablets, For Music Players, For Computers, For Televisions, For Laptop
Audio Driver Size	6.5 inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Best Sellers Rank	#39 in Car Speaker Bass Blockers
Brand	PAC
Built-In Media	(2) Bass Blocker
Color	Green
Compatible Devices	Desktop, Laptop, MP3 Player, Projector, Smartphone, Tablet, Television
Connectivity Protocol	USB
Connectivity Technology	Not Obtainable from the provided Amazon product information, but based on the product type and external sources, a reasonable guess would be 'Standard Speaker Wires' or 'Specific Speaker Connectors' like banana plugs or spade lugs.
Control Method	Touch
Customer Package Type	Standard Packaging
Customer Reviews	4.5 4.5 out of 5 stars (513)
Enclosure Material	Heat shrink tubing
Frequency Response	600 hertz
Global Trade Identification Number	00606523108331
Impedance	4 ohm
Is Waterproof	FALSE
Item Dimensions D x W x H	6"D x 4"W x 7"H
Item Weight	1.4 ounces
Manufacturer	PAC
Model Name	BB 2PR
Model Number	BB-2PR
Mounting Type	Integrated (Vehicle)
Number of Audio Channels	2
Number of Items	1
Power Source	Corded Electric
Speaker Maximum Output Power	12 watts
Speaker Size	6 inches
Speaker Type	Multimedia
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	6 inches
UPC	606523108331
Unit Count	1 Count
Warranty Description	1 YR Manufacture
Warranty Type	Limited
Woofer Diameter	6 inches

PAC BB-2PR Pair of Bass Blocker Designed for 6" Speakers, Green

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