get rid of the XXX for a ???

[slowsupratt 10+ year member]

It's not only that the high end frequencies are lacking but it also the higher end freq. sounds distorted. Almost if the sub is bottoming out/hit something.

 

[bass_lover1 10+ year member]

Well, you wanted a low end monster with high power handling. There are always trade offs.

 

[cx-7heaven 10+ year member]

Is the sub new still? If so, you should wait a few weeks until it breaks in, I have had quite a few subs that sounded very different after a few weeks compared to new. I still think you need to check for phase issues as well.

 

[audioholic 5,000+ posts]

Subs aren't suppose to play midbass. Your expectations are your problem, not the speaker. Upgrade your midbass up front, and/or tame the sub down with an EQ like basslover suggested. Its either that, or look for a different sub that plays midbass better, and pretend you fixed it the right way.

 

[bass_lover1 10+ year member]

I like how my DIYMA sounds playing up to 100hz //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[Safe_Cracker 10+ year member]

What frequency is your sub set at? How about up front maybe you can post how everything is set so that maybe we can get the big picture?

Polo..

 

[mmouse57 10+ year member]

hes running utopia mids up front they are some of the best mids/midbasses you can buy if he has the 7in midmass 3-4in midrange / tweeter 3 way kit it also comes with one of the best passive crossover systmes on the market so again he could hve the parts but it could be just tubed wrong or its out of phase :

 

[speedfreak28 10+ year member]

hes running utopia mids up front they are some of the best mids/midbasses you can buy if he has the 7in midmass 3-4in midrange / tweeter 3 way kit it also comes with one of the best passive crossover systmes on the market so again he could hve the parts but it could be just tubed wrong or its out of phase :

theres 2 differnt uptopia lines. sound like install issues more than anything , or unrealistic expecations

 

[Papermaker85 5,000+ posts]

nothing wrong with the install or box, you got a woofer that looks good on paper... lack of motor strength and powerhandling causes poor high frequency extentsion... get rid of the woofer and grab a RD audio alpha Max SSA Xcon or a audiopulse axis...

 

[only126db 10+ year member]

Don't know if this helps but here is the box the set-up...The top part doesn't have the cover so you can see everything better.

Sorry.... //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

One of these days you'll come by and I'll check your settings for you.

I wanted to do a ported enclosure, but well you know.... //content.invisioncic.com/y282845/emoticons/verymad.gif.3f39c5c2fd57527b671fad3efdfac756.gif

That install is not even close to what was supposed to be done, did you say anything to the prick? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

If you ever decide to go my original route (my house), I'll do the install for free, just get me the materials.

First off you need to bring it to my house and we'll go over the tuning.

Leave your girl at home this time, give her $100 and tell her to go get some new perfume or something then tell her you're going for a drive and cruise out.

I'm free this weekend (today & tomorrow) then busy for the next 3 weekends.

Unless that enclosure is flexing a ton we should be able to get it sounding half way decent, And as for the other guys saying the Hifonics is the issue, thats a friggin joke.

I have people running way high end/high dollar setups and equipment amazed at my sound and pissed when they find out what equipment I run and what it cost me.

Hifonics is just fine.

 

[bass_lover1 10+ year member]

nothing wrong with the install or box, you got a woofer that looks good on paper... lack of motor strength and powerhandling causes poor high frequency extentsion... get rid of the woofer and grab a RD audio alpha Max SSA Xcon or a audiopulse axis...

Weak motor would mean it needs relatively large enclosures, and lack of power handling is completely unrelated.

Upper end extension has a lot more to do with BL and inductance linearity.

The motor should be pretty linear across the board on the XXX, though I've seen no Dumax or Klippel results to back this up, but I doubt they would have gone a step down from the old version as far as that in concerned.

My guess, and I'm pretty sure I'm correct, is that the inductance on this speaker is pretty high up there, and THAT is your biggest factor in upper end frequency extension. A pretty big coil is needed because people want to throw kilowatt upon kilowatt to these things, with no regard what that does to inductance.

I bet it plays well up to 80hz, but it's so bloated down low it just appears to you that it can't play up higher.

 

[Papermaker85 5,000+ posts]

there are a few things that affect extention, both high and low frequency..

electrical dampning

mechanical dampning

indcutance

motor strength (not just B/L but actual power handling and higher power compression)

compliance (as is box/cabin space)

phasing

im tired of explaining this stuff over and over again.. MMS CMS KMS B and L as in powerhandling and power compression along with inductance is very important in reproducing the chosen bandwidth..

the woofer uses a dual coil single gap, trust me im very fimilar with the topologly.. the ver basics of physics tell us high mass to get the same accelration/deceleration means you need more force... as in you need higher concertrations of BOTH B and L.. and what i like to call ACTUAL motorstrength IE powerhandling.. B is the gensity of flux in hte gap while L is the amount of electromagnetic conductor exposed to B and where actual motor strength is the combionation of B=L+power(voltagex amperage) where inductance is the amount of lag between the voltage and amperag

 

[Papermaker85 5,000+ posts]

if the B/L simply isn't high enought and you powerhandling is very high its not converted from electrical power to acoustical power same can be said about mechanical damping.. improper mechanical dampning cause poor efficiency resulting in lowered acoustical power..

the newer XX is a excellent topologly, but its lacking in other areas.. instead of making hte gap to coil to seperation between the coils ration slightly different they chose to use the most linear ratio.. this results in lower B and L for a given stroke.. while power handling is excellent the lowered B/L cause Alot of wasted engery which in turn creats huge amounts of modulated flux.. which is very bad.. not only that the huge MMS means the motor simply cannot move the disphram far enoguht fast enough causing it to act like an acoustica/mechanical inductor.. the result is lowered output.. not only is the output/efficeny at the higher frequencies lower the low frequency extention and efficieny is excellent causing the FR to simply be VERY poor...

 

[Papermaker85 5,000+ posts]

tak for example the 9515.. very low QES(electrical dampning) lower compliance and lower mechinal dampning.. it has esscently too much B/L too low MMS to stiff a suspension for low frequency extention despite is faily low inductance(which doesn't limit its FR or transiant response in HFE) its cannot efficently play below abot 40hz.. now your going to say but i know they play low.. yes they do but your forcing it to do so when its not designed to do so... its the oppsite of the XXX... theree is a balence of MMS inductance B L power handling compliance linear excursion that has tobe accounted for when designing a speaker for a given alignment/application/medium... and IMO hte new XXX is not impressive at all for the money..

 

[Papermaker85 5,000+ posts]

Weak motor would mean it needs relatively large enclosures, and lack of power handling is completely unrelated.
Upper end extension has a lot more to do with BL and inductance linearity.

The motor should be pretty linear across the board on the XXX, though I've seen no Dumax or Klippel results to back this up, but I doubt they would have gone a step down from the old version as far as that in concerned.

My guess, and I'm pretty sure I'm correct, is that the inductance on this speaker is pretty high up there, and THAT is your biggest factor in upper end frequency extension. A pretty big coil is needed because people want to throw kilowatt upon kilowatt to these things, with no regard what that does to inductance.

I bet it plays well up to 80hz, but it's so bloated down low it just appears to you that it can't play up higher.

do you know what isductance is/does its NOT the only limiting factro, and quite frankly its not even a problem under 100 hz untill you hit 4mh+