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Wiring and amp specs

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=71382
Printed Date: May 17, 2024 at 3:44 PM


Topic: Wiring and amp specs

Posted By: latinoheat
Subject: Wiring and amp specs
Date Posted: January 23, 2006 at 9:35 PM

Hey I have some questions concerning some knowledge on some stereo wiring ****. Its been so long since I have been into most of its just slipped my mind.

So anyways I have an amp that this is what the specs say it is.....

Max output: 200Wx2Ch @ 2 ohm
power output: 85Wx2Ch @ 2 ohm
50Wx2Ch @ 4 ohm
170Wx1Ch BRIDGED
24dB/OCT Crossover slope
VARIABLE SUBSONIC FILTER (10Hz-100Hz)
VARIABLE LOW PASS FILTER (30Hz-500Hz)
VARIABLE HIGH PASS FILTER (50Hz-1KHz)
HIGH AND LOW LEVEL INPUT THROUGH RCA
2 OHM STABLE
TRI MODE CAPABILITY
0.05% THD

Now I was thinking of running this for my 10's with 4ohm DVC in a parallel wiring to get a 2 ohm stereo out. Does this sound okay? Also if you could clarify what all the specs really mean as far as what they should be set too. Most amps I have dealt with just had a gain and a Hz dial so to speak. My music of choice is generally all types and my box is a sealed DF enclosure. I would much rather have it set up for sq than spl.

Thx in advance



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"Gas, Grass or Ass, Nobody rides for free"



Replies:

Posted By: DYohn
Date Posted: January 23, 2006 at 10:13 PM

I'd suggest you wire your two speakers for a total 4-ohm load (series-parallel) and connect them to the amplifier bridged.  For a sealed enclosure I would turn off the subsonic filter (or set it to 10Hz) and then activate the low-pass set to between 80 and 100 Hz.  Then set your gain properly.



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Posted By: stevdart
Date Posted: January 23, 2006 at 10:17 PM

Looks like a decent two channel amp with a built-in subsonic filter.  Since you are using the subs in a sealed box you can leave the subsonic off.  Leave the highpass at flat because you won't be using it.  Instead you'll use the lowpass filter for subs, and set the frequency to cross over to the mid drivers.  That will be the amp that powers your front speakers.  Start out at about 80 Hz on both filters.  The 24 db/oct is the crossover slope, which means that the sub output will be reduced sharply above the cutoff point (the 80 Hz I mentioned).

How many DVC 4 ohm subs do you want to use?  The bridged output of the amp is 4 ohm stable, which is the same as 2 ohm per channel.  You want to wire your subs so that the net load is 4 ohms or higher and bridge across the channels.  So if you are using two DVC 4 subs, each sub is wired series and then parallel the two together for a 4 ohm load.

https://www.the12volt.com/caraudio/woofer_configurations.asp?Q=2&I=42



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: latinoheat
Date Posted: January 23, 2006 at 10:48 PM

SO wiring it as the series/parallel as you both have mentioned, would put me at how many watts for that one channel? 400w? And which adjustment is the gain? Seeing as how it is not just labeled as "gain"?



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"Gas, Grass or Ass, Nobody rides for free"




Posted By: dwarren
Date Posted: January 23, 2006 at 10:52 PM
If it it is not listed as gain, look for some thing that maybe says "input sensitivity". Remember that that control is not a volume knob for the amp.

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Posted By: stevdart
Date Posted: January 23, 2006 at 10:54 PM
170Wx1Ch BRIDGED

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: latinoheat
Date Posted: January 23, 2006 at 10:57 PM
Okay so when it says that its 200Wx2Ch @2 ohms, does that mean that the 200 is devided between the 2 channels? And at the bridged state it is basically supplying both speakers with 85W apiece or are they both seiing 170W?

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"Gas, Grass or Ass, Nobody rides for free"




Posted By: stevdart
Date Posted: January 23, 2006 at 11:10 PM

Max output doesn't mean anything.  This is a 2 X 50 watt amp at 4 ohm per channel.  A bridged load puts an equal amount of load onto each channel...so when you bridge a 4 ohm load onto this amp it is outputting 85 watts out of each channel (at 2 ohm per channel output).  The total output is 170 watts which is shared by all the subs you have connected.  With two subs, each one gets 85 watts.

With this way of stating "max" output, the manufacturers throw a confusing wrench into the gears.  This is not the best way to power two subwoofers.  That is to say, this amp should be used for a pair of coaxial or component speakers, or maybe one SVC4 sub.  It's workable but it doesn't sound like what you were hoping for.



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.





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