quote:Originally posted by nick probst: dual 2 doesn't equal 1.5.. it equals dual 2. d2 kicker cvx's RE spec is 1.7 for example. If they were dual 1.5's they would be listed as such.
the RE is the resistance that would be shown if you ran straight dc to the woofers.. Which i hope to hell you never will. So from there RE is the lowest possible impedance to be seen by the amps... which i would imagine would only be seen if you were playing WAY below tuning(over a full octave) with the windows opened.
Your amps will see .5 a piece. When i had my d1 btl wired to 2 ohms i clamped it at several frequencies and never saw below 2 ohms...
Well I know on Incriminators Dual 2...it reads 1.5 on the coil
-------------------- Posts: 6897 | From: Russellville AL | Registered: Nov 2002
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Hey Ed remember those crossovers that I told you I had? I had to pull the door pannel off of the car to deaden it and I pulled the other one out. I'll have both of them for you at the Wooster show on Saturday. Oh yeah, the box looks pretty good too. Only thing I would have done was pools to make 45's on the top baffle. Since you didn't screw the baffle on the box before you put it in the truck it's going to be hard to do 45's in those corners now unless you take the box out and do them. You may be able to do it if you flip the truck upside down, but I don't think that you've got the technology to do that
-------------------- Posts: 1031 | From: North Carolina | Registered: Jan 2008
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hahah yeah when i was bquieting the roof i was thinking how much easier it would be if i could just flip the truck upside down...then i thought about all the fluids and liquids going everywhere....eh nice idea in theory
but yeah def bring those xovers to wooster i'll see you there...
-------------------- .................................................................. 2005 Bass Race 139.9 World Finals Champion 2006 Bass Race 149.9 World Finals Champion 2007 Bass Race 149.9 2nd Place Regionals + Nationals 3rd Place Worlds
quote:Originally posted by nick probst: dual 2 doesn't equal 1.5.. it equals dual 2. d2 kicker cvx's RE spec is 1.7 for example. If they were dual 1.5's they would be listed as such.
the RE is the resistance that would be shown if you ran straight dc to the woofers.. Which i hope to hell you never will. So from there RE is the lowest possible impedance to be seen by the amps... which i would imagine would only be seen if you were playing WAY below tuning(over a full octave) with the windows opened.
Your amps will see .5 a piece. When i had my d1 btl wired to 2 ohms i clamped it at several frequencies and never saw below 2 ohms...
Well I know on Incriminators Dual 2...it reads 1.5 on the coil
because a dmm reads dc resistance
take a bunch of reactive loads and see what you get.
another concept to think about... would Fi build woofers that would inherintly blow amps because their not their true rated impedance?
Say if they were building d2 woofers that by real world standards weren't d2's but d1.5's. There are amps out there that just can't handle anything below their rated load... or go into protect.
so then you would have all kinds of people sending their amps into protect all day or smoking amps..
Fwiw, i talked directly to scott about the whole d2 being/not being d1.5's almost 2 years ago now.
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Posts: 73 | From: jackson, mi | Registered: May 2008
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Ed I got your text I hope you were implying the box is tuned to 63hz with no ports on it. Your enclosures net volume after woofer and port displacement at stock port length (17 inches) tunes you to 35hz. If your using my system of port differential to calculate your peak in the vehicle your loudest frequency should be 43hz. It should be closer to 45 after the new amps are installed. I will see you tomorrow...
-------------------- Team Db Linc Team Sundown Team Kinetik Posts: 95 | From: Ohio | Registered: Jan 2007
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quote:Originally posted by edthedrummer: right where? specifically please
should i have rounded the bottom side of the baffle? i havent screwed the speakers down yet so tell me quick
yes ed, rout the bottom of the cutouts. if it were only 1 layer it wouldnt do anything, but seeing as it is several layers and goes below the bottom rim of the mounting flange, it will help.
-------------------- -------- 2008 - IM BACK!!!!!!! 120-129.9!!!!!!! -------- Only multi-season competitor with a perfect score at every event attended. -------- 4th place 130-139.9 world finals '06 -------- 2006 nopi nationals 130-139.9 champ! -------- team kicker -------- team xtreme disturbance -------- Posts: 1821 | From: Metter Ga | Registered: Sep 2006
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excellent, now i just hope the wires are long enough that i can pull one sub out at a time and stuff the router in the hole, do its bizness, then move on to the next hole. wiring these subs is a PITA trying to get two 8 ga wires into a 10 ga opening
as it is now, finished, the box will not be coming all the way out unless i have me and 2-3 other stong people to lift it back in
so i'll try to get in there with either the router or if that doesnt fit or is too difficult to router upside down, i'll just use the 4" disc sander hooked up to my 60 gallon air compressor, should do the job (although not as nice as a router would)
thanks for the tips!
-------------------- .................................................................. 2005 Bass Race 139.9 World Finals Champion 2006 Bass Race 149.9 World Finals Champion 2007 Bass Race 149.9 2nd Place Regionals + Nationals 3rd Place Worlds
-------------------- -------- 2008 - IM BACK!!!!!!! 120-129.9!!!!!!! -------- Only multi-season competitor with a perfect score at every event attended. -------- 4th place 130-139.9 world finals '06 -------- 2006 nopi nationals 130-139.9 champ! -------- team kicker -------- team xtreme disturbance -------- Posts: 1821 | From: Metter Ga | Registered: Sep 2006
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suppose Company-A did give their subs a 0.2ohm lower resistance than Company-B's similar sub. Company-A's subs might have a tendency to seem to play 0.2dB louder on a direct swap just because of slightly higher power. Especially when it's dropping from two dual 1.7's to dual 1.5's wired down. That's the difference between burping at 0.375nominal versus .425nom. with rise it could be a bigger difference.
-------------------- World Record-Loudest SPL in my driveway Team Powermaster/XS-Power Hifonics Amps, Kicker subs-The way it should be....all were Stolen from me...boo hoo Zensky....World Domination at It's Finest www.zensky.com Posts: 3737 | From: Columbus, OH - formerly FL | Registered: Oct 2003
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^^^That makes sense to me. I recently had a pair of subs that when wired in series then paralled they read 1.4 ohms at the amp. They were dual 1's and I switched to new subs that were wired the same way and read 1 ohm at the amp. The subs that were at 1 ohm at the amp were 1.7 db louder from a direct swap. Now the second pair of subs were a bit beefier and had some more magnetic force to them, but I would be that since I had a lower resistance at the amp I was getting more power which helped my score.
-------------------- Posts: 1031 | From: North Carolina | Registered: Jan 2008
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Boston actually does that with their components and coaxel speakers in order to get them louder without the use of an external amplifier. Intelligent for getting a speaker louder....yet not...with a regular speaker your listening for detail not bass frequencies so IMO the higher the resistance the better.... When it comes to a subwoofer that is def. a different story because we are just talking mono bass frequencies.
Beneficial if the amp can do it....
Nick you should have used your MM4000 as an example. I have that repaired for you by the way...
.7 killed that thing. .7 and .5 also killed gardners 4kws twice.
-------------------- Team Db Linc Team Sundown Team Kinetik Posts: 95 | From: Ohio | Registered: Jan 2007
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yeah the 4kws have blown before but not like you would expect. every time they blow i'd have the volume at like 1/2 of my full tilt, so they never seemed to blow when i was pushing it to the max, weird.
im sure since this thing is only gonna get turned on and abused at shows these amps should hold up nicely for me
-------------------- .................................................................. 2005 Bass Race 139.9 World Finals Champion 2006 Bass Race 149.9 World Finals Champion 2007 Bass Race 149.9 2nd Place Regionals + Nationals 3rd Place Worlds
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bostons Pro, ProSE, and Z series components are 3ohm speakers. They're done that way to get a little more power out of an amp than at 4ohm, but without having to run at 2ohm and increase the THD alot. They only do this on their top speakers, which are rated 125 and 150rms each. Kenwood Excelon speakers are 3ohm as well.
-------------------- World Record-Loudest SPL in my driveway Team Powermaster/XS-Power Hifonics Amps, Kicker subs-The way it should be....all were Stolen from me...boo hoo Zensky....World Domination at It's Finest www.zensky.com Posts: 3737 | From: Columbus, OH - formerly FL | Registered: Oct 2003
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