Jump to content

cf4's vs. Khorn's review


Recommended Posts


How much and how deep did you fill the CF-4s with the polyfil?

I took the 1.5" foam sheets out of the bottom section (technically two .75 inch placed together).  I used about a pound of polyfil that sits on the very bottom, just under the ports and to the side.  I did not block air flow to the ports.


Also, what is everyone's opinion on using either of these items, Qiuckroof (http://www.cofair.com/roof.aspx), and Frostking (http://www.frostking.com/foil-and-fiberglass-duct-wrap/) to wrap the horn to contain resonance?

That Quickroof looks fine.  I'm not sure I have ever seen two people use the same damping material!  I used pure silicon seal and I have seen others use car damping sheets cut to fit.


The Frost King insulation looks OK as well.


I ask about the wraps because I have some leftover from my Beetle project.

It's probably expensive compared to the $5 tubes of silicon seal I used.  Since you already have it I say go ahead and use it.  I suggest you try the "knuckle rap" test just to confirm that it changes the resonance point.  You will go from a high pitched "tic!" to something just a little lower, more dead sounding perhaps.


One last question, for those of us that don't have version 1 CF-4s or CF-3s, does adding  longer ports help to improve the sound reproduction of our speakers?



I don't know.  Most people who are doing mods seem to like using the 5.5" port tube instead of the 3" tube, I've never heard the version 2 or 3.  In general people seem to think it is easy to retro-fit the version 2 to a v1, and the version 3 takes more modification with the port tube and some crossover values.


John have you seen the Klipsch Epic Owners thread?  It covers a LOT of the mods people do, in detail.



Edited by wvu80
  • Like 2
Link to comment
Share on other sites

Just a fyi, if you get CF-4's in a room with a long wall with tall ceilings and play with spacing, they'll sound amazing. I've never had the right room to have mine in until I bought my new house and once I got their placement just right, they imaged like no other. And mine are all original, unmodded AND I had em on a budget Denon receiver.

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...