posted
i think a narrower enclosure would gain you more aswell if you stuck with the slot port.
theres no doubt that a flared round port will set u up even better though.
maybe your next thread you could make 2 10" aeros and just work on enclosure volumes/shapes and port lengths until ur dialed in.
-------------------- Dustin Page 97 explorer (TOTALLED) 155.8 Team Deaftraps
81 malibu wagon 160+ bassracer--debuting spring 2010
DO NOT DO BUSINESS WITH H&K KENT. HE RIPPED ME OFF FOR OVER $2000. STAY AWAY! Posts: 1126 | From: abbotsford, bc, canada | Registered: Oct 2005
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quote:Originally posted by Wagonized: i think a narrower enclosure would gain you more aswell if you stuck with the slot port.
theres no doubt that a flared round port will set u up even better though.
maybe your next thread you could make 2 10" aeros and just work on enclosure volumes/shapes and port lengths until ur dialed in.
Indeed. I think narrower boxes do work great in the Jeep based on the single 15" box results. Unfortunately, I can't get the box volume I want any narrower with the two 15" subs as I can't go higher or deeper to make up for any decreased width.
I have thought about making a single 18 or dual 12 box that is narrower to try out in here. I'll also try out round ports once I get this setup to the point where it won't gain any more. But I think I have more to go with this one first
-------------------- - Jacob Fuller Posts: 990 | From: Mooresville, NC | Registered: Oct 2001
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posted
I see the 45s inside your box actually curved. Have you tested straight 45s aswell and was there an increase between curved and straight?
Posts: 10 | From: Orlando, Fl/Harrison, Ark | Registered: Apr 2009
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quote:Originally posted by LoudBlazer: I see the 45s inside your box actually curved. Have you tested straight 45s aswell and was there an increase between curved and straight?
In this box I have straight 45s - I haven't tested the curved ones yet in this box. The curved piece picture is from another box I built a while back.
We'll find out if there is any gain
-------------------- - Jacob Fuller Posts: 990 | From: Mooresville, NC | Registered: Oct 2001
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posted
Woops - I made a mistake earlier... must have looked at the wrong data for the subs I was using before. They are 3.0 DCR and not 3.5 DCR as I was assuming before.
With those D4 coils all in parallel I had 0.375 DCR per amp, which is more like a 0.5 ohm nominal load.
With the D1 Nightshades I built I have an actual 0.50 DCR load per amp, which is more like 0.70 ohms nominal.
Even still... it is doing 154.3 dB with a DCR much higher.
I may have to wire the amps down lower and try it that way with these coils. Or use a different amp configuration like four 1500Ds wired down to 0.25 DCR each to get a better comparison.
posted
So far the 1500s aren't much liking the 0.25 load. I can roll it and get a score but not high enough to do a GOOD score.
So I may just need to wait for 3500s and use the 0.5 DCR load for now and then build some other subs later once I get it all dialed it for the 0.375 DCR load again.
-------------------- - Jacob Fuller Posts: 990 | From: Mooresville, NC | Registered: Oct 2001
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quote:Originally posted by LoudBlazer: I see the 45s inside your box actually curved. Have you tested straight 45s aswell and was there an increase between curved and straight?
In this box I have straight 45s - I haven't tested the curved ones yet in this box. The curved piece picture is from another box I built a while back.
We'll find out if there is any gain
Thanks. Id love to know if there is a gain with curved so I can possible make changes to my box Thanks Jacob
Posts: 10 | From: Orlando, Fl/Harrison, Ark | Registered: Apr 2009
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posted
their should be a gain with the curved over the staight 45!! I have tried both and gained about 2tenths over the straight 45.!! it is possible to see more of a gain depending on your enclosure
-------------------- TEAM DB UNIT (Master Yoda) 2006 Competition Only Hardcore Points Champion 2006 Competition Only Trunk Stock Points Champion 2007 Competition Only Trunk Stock Points Champion 2008 Competition Only Overall Points Champion http://www.competitiononly.com/ Authorized Second Skin Dealer www.secondskinaudio.com [IMG]
posted
Well I figured there should be a gain but to see a true life expirement would make it almost definite. Things is tho is how will i get my old stright 45 out and replace it with a curved piece . Now get back to work Mr. Fuller Posts: 10 | From: Orlando, Fl/Harrison, Ark | Registered: Apr 2009
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SoundStream/XS Power 5th place SS N/W World Finals 08 Reigonal 5th place SS N/W World Finals 09 N. America Posts: 1134 | From: Yorktown, IN | Registered: Aug 2007
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what class are you trying to play with this setup? if you were to move the subs closer to the front of the vehicle on the top of the enclosure, you should gain. i f you can slide the enclosure closer to the front of the vehicle, your frequency will go up but should get louder as well.
you can try kicking the enclosure around at a slight angle to help align and load a little more at the sensor than in the center of the windshield.
also, try removing that piece of pvc along the bottom of the port, and replace it with a piece of mdf laid down there and taped to the enclosure.
you could also probably gain a bit by replacing all of your tape with metal tape. put the metal tape down, then run over it with a dynamat roller. use several layers so it is good and stiff.
also, just another tip, go around the motor of the subs and add tape to around the motor to smooth out the area from the magnet slugs, and the top / bottom plates of the motor. the goal here is to make the outside of the motor as rounded as possible. this always got big gains in my car. i would always remove the magnet boot and do this.
-------------------- I dont mean to be condescending (which means to talk down to)......
posted
This is for SS NW and several other classes in different organizations:
MECA MX3 Competition Only Pro 1501+ NSPL No-Wall 24-48 Whatever IASCA class it fits in
I can't get it forward any farther as it is touching the amp rack now - it is in a similar position to my other boxes which actually got a bit quieter if slid farther forward or backward.
I'll try the metal tape too once I figure out if 45s or arcs are better for my corners.
Have never tried taping the motor - I'll add that to my list to-do.
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One thing I found with this box... my holes were cut VERY tight this time. There is no difference between taping around the subs, using a gasket, or using nothing at all.
Previously with lower quality holes (eg: not done with a router) I gained by using tape or a gasket.
-------------------- - Jacob Fuller Posts: 990 | From: Mooresville, NC | Registered: Oct 2001
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I have a smaller version of this box that is not as loud as this box even being tuned to the correct 53 Hz frequency - so I don't want to go TOO much smaller.
try different tuning. i dont think a smaller box that is tuned same as the bigger box would neccessarily work. i thnk u would know that tuning of the box is affected as much by the port as by the box itself. If the box is different there is a good chance the tuning needs to be different also. Something to try maybe?
quote:Originally posted by sundownz: Tinted,
I have a smaller version of this box that is not as loud as this box even being tuned to the correct 53 Hz frequency - so I don't want to go TOO much smaller.
cmon man, dont ask noob questions like that on public forums. makes all Canadians look bad.
quote:Originally posted by JordyO: How do you get the arc in the angled piece like that?
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2006 Street A - 152.7 Certified 2007 Street C - 154.8 Certified 2007 Street A - 154.4 Certified 2008 Street C - 156.3 Certified 2008 Street B - 156.6 Certified
TEAM FEAR OF BASS Posts: 3611 | From: Toronto, On, Canada | Registered: Feb 2001
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I have a smaller version of this box that is not as loud as this box even being tuned to the correct 53 Hz frequency - so I don't want to go TOO much smaller.
try different tuning. i dont think a smaller box that is tuned same as the bigger box would neccessarily work. i thnk u would know that tuning of the box is affected as much by the port as by the box itself. If the box is different there is a good chance the tuning needs to be different also. Something to try maybe?
quote:Originally posted by JordyO: How do you get the arc in the angled piece like that?
cmon man dont ask noob questions like that on a public forum, makes all Canadians look bad.
--------------------
2006 Street A - 152.7 Certified 2007 Street C - 154.8 Certified 2007 Street A - 154.4 Certified 2008 Street C - 156.3 Certified 2008 Street B - 156.6 Certified
TEAM FEAR OF BASS Posts: 3611 | From: Toronto, On, Canada | Registered: Feb 2001
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2006 Street A - 152.7 Certified 2007 Street C - 154.8 Certified 2007 Street A - 154.4 Certified 2008 Street C - 156.3 Certified 2008 Street B - 156.6 Certified
TEAM FEAR OF BASS Posts: 3611 | From: Toronto, On, Canada | Registered: Feb 2001
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posted
from your pics it looks like u can make a much narrower box. i see lots of space between the subs and towards the edges of the box.
just make a box that's only wide enough to fit two subs beside each other. dont worry too much about not having enough port area, just make the port as big as the space allows and tune it as best or as close to what u need as possible.
trust me, just try that. i know the box will be much smaller but try it. dont worry about not enough port area. those subs are 15's? so make a box thats only 33 inches wide. make the port as wide as possible and go from there.
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2006 Street A - 152.7 Certified 2007 Street C - 154.8 Certified 2007 Street A - 154.4 Certified 2008 Street C - 156.3 Certified 2008 Street B - 156.6 Certified
TEAM FEAR OF BASS Posts: 3611 | From: Toronto, On, Canada | Registered: Feb 2001
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