posted
When a sub or midbass is referred to as sounding muddy is this the spkr distorting because it is trying to reproduce freqs lower than it is designed for?
Will this clean up at lower power (volume) levels?
Would changing from a sealed box to a ported box help? Will sq be better or worse?
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posted
I've typically found that subs in the wrong box sound muddy. Generally, subs in too large a box will get boomy. Try experimenting with polyfill, if that makes things worse, try stuff some blocks to take up airspace in the box. You've got to figure out what size box the sub needs though...
------------------ STILL waiting to hear a GOOD pair of HLCD's!!
If it dont fit, force it... if it breaks, it needed to be replaced anyway...
posted
Actually getting at how low to drive my midbass. The punch 8" seeemed muddy at below 80 hz in a very small sealed box with lots of dacron. Trying to understand the low end distortion point.
Got a set of FNQ 6.5 to try for midbass in my doors. When I get that to work I may go back to the 8" and try a more radical build out. I think midbass must be aimed like kick panels are.
The current challenge is to cover the 80 to 100 hz area well. An installer told me the 6.5s would distort below 100 hz. (muddy ?)
I know the range is small but the more I develope my system the pickier I get.
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[This message has been edited by T A Sam (edited 09-28-99).]
posted
TA Sam I know how you feel, I want to do the same thing, exactly the same thing... I plan on running subs to 60hz, 8"s to 215hz, and 6.5"s to 4800hz... I have talked to a LOT of people about this and have played with other speakers and subs with this combo and it seems to work the best... Just my $0.02, I am going for serious SQ and this will be my setup... I think you are right with the new 8" build out, give em more space and I think you will be happy...
------------------ Objects in mirror are more stable than they appear.
Posts: 186 | From: Grande Prairie, Alberta, Canada | Registered: May 1999
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posted
The thing to keep in mind is, you have to build the right size enclosure if you expect it to sound right. I have Focal 5KX subs in the front doors of my 88 Accord. I had to weld steel boxes of .18f3 into my doors and port them to get them to sound really good. They are tuned at around 45Hz, and run the gammut of 20-80Hz. My real subs, run from 20-55Hz. My 5.25 mids run in .12 F3 ported boxes tuned at 70Hz from 60Hz to 3Khz. Tweets pick up at 2200Hz and run up from there. Anyway, you need the right box for those 8's. Maybe, if you get the specs for the 6's, you will be happy with them in the right box. Let me know if you need anything else!
------------------ STILL waiting to hear a GOOD pair of HLCD's!!
If it dont fit, force it... if it breaks, it needed to be replaced anyway...
posted
I was hoping to get great sq out of the fnq 6.5s. Actually better than the 8" but with lower volume potential.
I am thinking of a ported box to get the response of the 6.5s to 70 or 80 hz which is the same as the 8"s, but don't know how the spl will compare.
Hey, let's compare efficiency.Are efficiency,sensitivity and spl speaker specs all the same thing? rfp 1408 - 85 db (1w/1m) fnq 1406 - 89 db Is the output of the fnq significantly more than the punch?
Does a 3db rise in spl require double the power? ( thought I heard that somewhere) ------------------ Trans Am Sam ............ Powered by Rockford Fosgate. Fueled by Kenwood.
[This message has been edited by T A Sam (edited 09-29-99).]
posted
On the surface, a higher efficiency speaker should play louder. The thing is, they test all speakers effeciency at the same 1k tone. If they were to test where it is meant to play at, it'd be a different story. For a good mid to play 89dB at 2.83V/1meter at 1K is no big deal. For good sub to play the same IS a big deal. The sub wasn't designed to play at 1k. Play that sub at 35Hz or 50Hz and you may find it to be 89dB or even more. No, higher effeciency does not mean you need more power, it means just the opposite, you dont need as much.
------------------ STILL waiting to hear a GOOD pair of HLCD's!!
If it dont fit, force it... if it breaks, it needed to be replaced anyway...
posted
Well, it could be the amount of power across the speakers, but I would suggest raising the volume of the chamber and taking out *some* of the dacron.
If that doesn't work, put the subs in a dedicated MDF enclosure of about one foot in volume (per speaker) and slowly fill the chamber up with pieces of mdf until you find the best sound. Use a reference amp (something big with two channels so you use high amounts of clean power) and some midbassy music.
Tweakin sucks, but then you get addicted to it.
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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