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Author Topic: mid driver selection pros and cons  (Read 2930 times)

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Offline craziechild

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mid driver selection pros and cons
« on: November 23, 2007, 01:17:06 PM »
hi all sifu...

i have a newbie 3-way setup... and currently still in the process of fine tuning...

ok... my question is currently i am using dome type mid range... and i feel that mid-bass is not enough in front for me...

so would changing the dome mid range to a 5" mid at the kick panel help? thinking of converting the whole kick panel into a small sealed enclosure for the 5" mid...

well as a newbie... i wish to hear about the sifu's comment about the change... and the pro and cons...

oh ya... the current midrange is also at the kick panel...

cheers...
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Offline Audiophiliac

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Re: mid driver selection pros and cons
« Reply #1 on: November 23, 2007, 02:49:56 PM »
change to 6.5" Mids sure bass improved
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Offline Zenn

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Re: mid driver selection pros and cons
« Reply #2 on: November 23, 2007, 03:03:11 PM »
if midbass is the problem why wanna change the midrange? maybe u just nee dmore power to the midbass, or installation can be improved, like adding metal ring or something..
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Offline polkman

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Re: mid driver selection pros and cons
« Reply #3 on: November 23, 2007, 03:04:14 PM »
I guess if your setup is active, you need to recheck your xover frequency for your mid and midbass.
Your xover should not be lower than 250Hz at 18db slope because the mid dome cannot play to lower than 250Hz.

If your xover frequency is ok, than you need to make sure your midbass driver are installed properly. Reinforced your door with damping material and make sure to cover up all the holes on the inner side of doors.

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Offline craziechild

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Re: mid driver selection pros and cons
« Reply #4 on: November 23, 2007, 03:37:26 PM »
the door hass been reinforced with 2 layers of dynamat extreme and a layer of wruth like what polkman has said...

actually was thinking about double 6.5" but then the kick panel space only allow 5" max... while the door area... copper ring made was speacially for the 6" iridium already... hehe...

anyway... the area i wan to improve is mid bass area... sub bass is area is enough to me already... just mid bass is lacking... thts why thought of the 5" change...

anyway... currently xover point roughly around
tweeter: hp 2.5k 12db slope
3" mid: hp 350 24db slope lp 2.2k 18db slope
6" mid: hp 70 12db slope lp 350 24db slope
sub: lp 70 30db slope

no TA used... i am anti TA actually...

graphic EQ tuning is going on now when i am free...

any comment? thought change to 5" would be faster to get what i needed...

cheers...
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Offline wengweng

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Re: mid driver selection pros and cons
« Reply #5 on: November 23, 2007, 04:21:29 PM »
The midrange has nothing to do with midbass leh. If want keng keng midbass, change to 8" or double 6" at the door. hahaha
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Offline craziechild

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Re: mid driver selection pros and cons
« Reply #6 on: November 23, 2007, 06:21:51 PM »
hmm... i was thinking of overlapping some of the frequency of the 6" and the 5"...
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Offline wengweng

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Re: mid driver selection pros and cons
« Reply #7 on: November 23, 2007, 07:22:44 PM »
like that have to ask sifu polkman. He using double 5, if not wrong. keng keng midbass. But his is in sealed enclosure
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Offline craziechild

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Re: mid driver selection pros and cons
« Reply #8 on: November 23, 2007, 07:32:12 PM »
ya ya... thts what i have in mind but 6" on door without enclosure... then 5" in kick panel with a custom fibre job sealed enclosure....

but where to find polkman sifu ah? hehe...

mayb need a chat with him about tuning also later...

cheers...
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Offline Zenn

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Re: mid driver selection pros and cons
« Reply #9 on: November 23, 2007, 08:17:58 PM »
i guess u have to lower your midbass hp to 60+ or maybe 50+ if the mid can handle it.  other than that would be feeding it more power.
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Offline craziechild

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Re: mid driver selection pros and cons
« Reply #10 on: November 23, 2007, 09:19:09 PM »
will try tht zenn... thanks...

btw... is my slopes setting ok?
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Offline octave

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Re: mid driver selection pros and cons
« Reply #11 on: November 23, 2007, 10:42:14 PM »
craziechild

although I am in 2-way system ( one man one women ) and not in one man two wives ( 3-way system ) ..... may i suggest that you set as :

sub lp 70 at 6 dB
6" mid lp 70 6 dB and hp 350 6 dB
3" mid hp 350 6 dB and lp 2.2k 12 dB
tweeter hp 2.2k 12 dB

 /134 .... when you have more than one wife ....
set the days correctly .... otherwise .... gadoh aja  /152

and you get frustrated at no enjoying the goodies
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Offline craziechild

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Re: mid driver selection pros and cons
« Reply #12 on: November 24, 2007, 01:33:13 AM »
octave... any reason for setting most of the slopes at the same value?

want some expert advise from you...

thanks...
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Offline octave

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Re: mid driver selection pros and cons
« Reply #13 on: November 24, 2007, 05:35:39 AM »
craziechild

why do you slope the mid at such high values ?

first ... your sub (30dB) does not blend with your 6" mid ( 12dB ) .
sub should rightfully be set at 6 dB , to allow the roll-off . does
sub-bass rumbles along .....  /196  or comes to an abrupt stop ?

second ... the slope should be gradual from the high to low frequencies .
with the highs having higher slopes .

at any rate , do give it a try . it is free ... anyway .
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Offline craziechild

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Re: mid driver selection pros and cons
« Reply #14 on: November 24, 2007, 06:29:43 AM »
but i always read in the west side forum...

i. higher slopes is better to achive front sub bass... while
ii. high slope between the 6" and the 3" mid is better when they are both placed close together...

any truth in this?

surely will try out the slope settting you suggested...

thanks...
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