21619
From: Chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Brian Owens This one is for you
| Went BACK to the local car audio shop today. Explained my problem to them as this. I have a baby little Alpine V12 Mrv-t503 Amp and i have my 2 12" DVC hollywood excursions rated at 350 rms 650 peak. Wired in series and bridged on my little amp. My box is roughly INSIDE dementions 14"h 36"w 8" d I told them Hey I had to crank the gain WAY down on the amp it is bassing me out the car. They Suggested adding 2 MORE dvc 12" 's In there. What Gives?. Why would they say that.? I can not exactly Crank the Amp up and do many tests cause The Area I own my house is rather Um CONSERVITIVE I have to tone everything down when i pull in for they like to call the 5.0 On all (hypocrites) If you could lead me in a path to start. It would be helpfull thanks |
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21620
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Brian Owens This one is for you
|
more to add sorry. I have the DVC wired in series and both feeds wired to the amp bridged. I believe the amp is 500max bridged. I can not find any info on the amp. My box does NOT share the volume i have a divider in there all is 3/4 MDF and drywall screwes and a Hella lot of glue and 2 coats of 100% silicone the subs are 12" hollywood excursions model 1255-d 4ohm per Voice coil. amp as i said alpine head unit is a chitty Pioneer |
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21622
From: Brian Owens, [spider-wm022.proxy.aol.com]
Subject: Re: Brian Owens This one is for you
URL: my webpage
|
I don't understand. . .you have too much bass, and they said add more subs. . .???? Only thing I can figure out: are the subs in too much airspace? A car sub should be tuned to make good bass around 35 Hz, and the car cabin gain wil expand the bass on down into the 20 Hz range. If yours are tuned too low, along with the cabin gain you may be getting too much bass in the lower frequencies. Or, it could just be you are making more bass than you like. . .In that case, your local stereo shop guys are crazy!!! Ever thought about getting rid of one of the subs?? If not, just keep the gain turned down; doesn't hurt anything to have extra power for headroom on subs. Am I missing something?? . . let me know. Brian |
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21625
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Brian Owens This one is for you
| Nope you didnt miss anything. I thought they were crazy also. Only thing I can gather is they are thinking maybe add more subs to take more amp power. For now I am gonna keep the amp down. One Sub is a little week. 2 and it is over powering me. I think it may just be i have been out of the Loop for some years and i am just not used to it. When I am alone in the car and am driving i can "stand" the radio all the way up and want more bass. I was thinking of adding a 3 way crossover in the glove box for a little more controll. and also maybe help even it out by adding some more power to the doors and rear speakers. What Ya think.... It prolly is me just getting old LOL |
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21657
From: Brian, [gnd210-123.caribsurf.com]
Subject: Re: Brian Owens This one is for you
|
Two things come to mind: (1) the input level to your amplifier is way too high. Where's it coming from? It might be possible to turn it down. (2) If you've got any sort of bass boost control on the amplifier, it's set way too high. Turn it down. |
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None
21643
From: Corey, [flubber.conectiv.com]
Subject: Re: Brian Owens This one is for you
URL: My Toyota
| Hey just a thought ... use a test cd with frequency steps and measure what freq. the bass is getting too strong, then use an active crossover to step that particular frequenct down. |
21645
From: chris , [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Brian Owens This one is for you
| a test cd I picked up says to me that 165 175 cycles is where it is loudest. I dont have a crosover as of yet i just use the one in the amp so i suppose I am gonna buy a active crossover and mount it in. active is ok aint it? |
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21767
From: Brian, [gnd210-115.caribsurf.com]
Subject: Re: Brian Owens This one is for you
|
165-175 cycles? That's a bit high for for a subwoofer. Check the amplifier to see if the x-over is actually engaged. |
Responses:
None
21639
From: Vega-Man, [207-245-78-90.dca.net]
Subject: Re: Brian Owens This one is for you
URL: My webpage.....
|
Hey if you have a rear axel to spare for the all wheel drive tempo, let me know, as i have one sitting around waiting for an axle. My all wheel drive is set up on a switch of some kind.... just plain neat. |
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21644
From: Chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Brian Owens This one is for you
| Nope Vega I dont lol Mine both need replaced. I just Put the bearing in the right rear Hub. Just the bearing cost me $40.00 US Thank god for father in laws that work at a dealership. If ya want i can check around here and maybe i can find ya one cheaper. Yea I like that Little switch in the middle of the light holder on the headliner lol let me know |
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21648
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Brian Owens This one is for you
| this is toooooo funny I was checking out rattles today and there is a snall factory drilled hole in the deck lid by the light. The air was pouring aout this little 1/4 hole hmmmm maybe i should guess what the spl is HAHAHAHA. sorry that was to neat not to share |
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21654
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Brian Owens This one is for you
|
insainity is the key to all i suppose! Well Played with the amp some and got it at 3/4 gain 9-10 bd boost. 0 degrees on phase i tried both phases. 0 saounded better Have the amp crosover set at er gatta think here 140 - 150 i think On the LP filter yea thats about it. I have a kinda DUMB question now. I can still crank it all the way up and Stand it but at like 42 the radio goes to 46 I think it is starting to distort badly and i KNOW i am no where near the watts thoes 12"'s can take. Is it the head unit or i am pushing out the amp too far and i need a biger amp. Money is a issue but not a relitive restriction, In my area I can get legacy |
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21679
From: Vega-Man, [207-245-78-90.dca.net]
Subject: Re: Brian Owens This one is for you
URL: My webpage.....
|
A bigger amp doesn't hurt.... turn the LP xo on the sub amp to 100hz or below. I tend to keep it @ 80hz or a little below in the car environment. The wierd peaks etc. or too much SPL could be caused by the mud created by the sub above 100hz... You have to remember that anything above 80hz is no longer omni-directional, which means you can tell where it is coming from... the distortion you are hearing is probably the head unit.... depends if your 44 or 46 is 3/4 volume or so.... |
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21695
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Vega or brian
| Ok here is what i did besides pulling my hair out, I went and got a boss rt-635 1200w I know before anyone says it it is not a ture 1200w The crossover which is in it really sucks and now i have no play money so i have to wait to get a active crossover. Anyway I STILL have the same problem but only sooner on the dial now. My next step is to think that the box i built is wrong! I think It could be a little on the small size i cant find my figures to see if i encluded the speaker volume and added more space to make up for it. I honestly cant remember., Now back to the amp. It is running in stero NON bridged. LP filter is on and i am accepting 80h I have the 18db boost on which i may change! So I am getting lost and frustrated, help? |
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21696
From: Vega-Man, [207-245-78-90.dca.net]
Subject: Turn the boost down and half gain....
URL: My webpage.....
| Get rid of the 18db of boost... as that may be distorting things a bit.... crank the gain half way or so and slowly adjust from there. |
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21698
From: chris , [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Turn the boost down and half gain....
| what does resonance sound like? Is it like a echo sound or somthing after the note hits? Or is that more of a distortion? |
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21697
From: chris , [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Turn the boost down and half gain....
|
cool I will try it later tonight i am on 24hrs no sleep yet. One more thing I have my 12's Dual voice coils wired in series. Should i change it? So it is like this now Left channel out to sub vc1+ to vc2+ vc1- to vc2- Right channel out to sub vc1+ to vc2+ vc1- to vc2- They suggested not to bridge it to run it in stero. I do know I need a active crossover so i can use my other amp for other speakers.... |
21699
From: Vega-Man, [207-245-78-90.dca.net]
Subject: Re: Turn the boost down and half gain....
URL: My webpage.....
|
Well you can run the voice coils in parallel if you are using stereo.... amp should take it. and on your question about resonance... resonance is the one note when everything in the car goes BMMMMMMMMMMMMMMM........ test tones can find that note real easy. |
21716
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Turn the boost down and half gain....
| one of te tracks i fund measures everything in cycles. it goes bmmmmmmmmmmmmmm round 170-165 cycles. Gonna Make the subs wired in paralell tomarrow to see what happens Turned the db step off and i can keep the bass cleaner with the sub reomte controll i still think the box may be to small. I'll take mesuarments tomarrow and post em |
21720
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: Turn the boost down and half gain....
| Via the info found on this site I have my DVC wired in parallel now. Is it Just me or is that just not right? http://www.geocities.com/f4ier/dvc.htm Should I try it in series then? |
21727
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Vega Want me to look for that Axel?
| what year is it, Mines a 88 so yers is prolly right around there too, |
21760
From: Vega-Man, [207-245-78-90.dca.net]
Subject: it's an 88 but i don't have any cash....(nt)
URL: My webpage.....
| .... |
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21787
From: chris, [dhcp024-209-035-016.neo.rr.com]
Subject: Re: it's an 88 but i don't have any cash....(nt)
| ok I understand lemme see what i can find round here. I have a few buds that owe me. |
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