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Pair of Bass Blocker / Passive Crossover; Removes 0-300Hz at 4 ohms, 0-150Hz at 8 ohms (BB1PR)

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&bull Pair of Bass Blockers for 6" x 9" Speakers
• Blocks 0-300Hz @ 4 Ohms
• Blocks 0-150Hz @ 8 Ohms
• Filters Out Unwanted Frequencies Towards Speakers

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  • Pair of Bass Blockers
  • Used for removing bass from speakers to prevent damage
  • Frequencies Blocked:
    • 4 Ohms: 0-300 Hz
    • 8 Ohms: 0-150 Hz
  • Filters out unwanted frequencies sent to the speakers
  • Passive Crossover designed for 6" x 9" speakers
  • Easily handles power of up to 50 watts
  • Blue color coded leads for easy identification
  • Installs in-line to speakers on the positive speaker wire
  • Encased in plastic casing with wire leads for simple and durable installation
  • Color: Blue wire leads with a black casing
  • Capacitance uF (microFarad): 132.50 uF
  • Dimensions (without wire leads): 1-5/8"L x 5/8"W x 5/8"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
Crossover Frequency (Hertz) 8 Ohms 4 Ohms 2 Ohms
248.44 uF
496.88 uF
993.75 uF
100 198.75 uF 397.50 uF 795.00 uF
120 165.63 uF 331.25 uF 662.50 uF
132.50 uF
265.00 uF
530.00 uF
99.38 uF
198.75 uF
397.50 uF
70.98 uF
141.96 uF
283.93 uF
49.69 uF
99.38 uF
198.75 uF
33.13 uF
66.25 uF
132.50 uF
800 24.84 uF 49.69 uF 99.38 uF
1000 19.88 uF 39.75 uF 79.50 uF
16.56 uF
33.13 uF
66.25 uF
2000 9.94 uF 19.88 uF 39.75 uF
4000 4.97 uF 9.94 uF 19.88 uF
3.98 uF
7.95 uF
15.90 uF
3.31 uF
6.63 uF
13.25 uF
2.48 uF
4.97 uF
9.94 uF
10000 1.99 uF 3.98 uF 7.95 uF
1.66 uF
3.31 uF
6.63 uF

Product history:

PAC BB-1PR thumbnail
(newest, current model)
PAC BB-1 thumbnail
(previous model, replaced by PAC BB-1PR)

Item Details



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Customer Ratings & Reviews

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Customer Reviews

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Great product

I bought these to cut some bass out of the cheap 6x9s i accuqired from a friend, they worked great and cut out the distortion from the speakers. Its been six months now still going strong!

By Stevie on February 9, 2012


found this helpful.

Works good

I had stock speakers and my headunit was over powering my 6x9s. I threw these in and ended up working pretty well.

By Jfinnkma on February 6, 2012


found this helpful.

Good product

I purchased this product in the process of creating a overall good sounding system. I have two 15 Kicker CVX subs powered by a Hifonics 1700, so needless to say I had plenty of bass, the speakers I had were getting distorted when loud. I picked up 2 pairs of these and it was a world of difference. Great overall product.

By Alexander on July 4, 2011


found this helpful.


the easy install my(4) 6X9 sound great shipping was fast

By Todd on January 16, 2015


found this helpful.

Helps a lot!

These were perfect to cancel out some unwanted frequencies going to my alpine and Rockford Fosgate speakers. Now there is less chance of them getting damaged when I crank my tunes.

By Braden on March 27, 2012


found this helpful.

They stop the rattle!

Added these to my door speakers (Infinity Kappa 5x7s) since my Kappa sub does all the low end work - solved my door panel rattle. Does good job of rolling off beneath 300hz. Wish it was adjustable, but thats what a crossover is for.

By Judson on September 21, 2013


found this helpful.


Blocked the base to my tweaters in my 2002 Mustang with factory Mach speakers.

By Michael on May 2, 2011


found this helpful.

exactly what i needed

I called sonic electronix and told him what I needed... exactly what I needed and works great

By Gerald on January 15, 2016 Checkmark Icon Verified purchase


found this helpful.

Works great… for 4”x6”

Threw these in a order with 4x6 NVX speakers to get free shipping, they worked great in helping those little speakers keep up with the 6x9 NVX speakers I had installed previously. I don’t know why these are advertised for 6x9 when most car speakers are 4-ohm instead of 8-ohm, I could see a 6x9 needing to be cutoff at 150Hz but not 300Hz

By Kyle on April 15, 2022 Checkmark Icon Verified purchase


found this helpful.

Bass Blockers

So when I had first bought this I was worried knowing I had a inline converter to my back door speaker to my sub well not only did it stop alot off bass coming out of the door speakers it also made my bass sound more clear I was impressed what these little things can do

By edward on October 5, 2015 Checkmark Icon Verified purchase


found this helpful.

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