posted
amp at half gain h/u vol 10 139.3 v ac 49.1 aca 6880 watts @ 2.8 rise vol 12 162.1 v ac 52.3aca 8477 watts @3 ohm 160,1 db vol 13 163.5 v ac 52.4 aca 8540 watts @ 3.1 ohm 160.1 db
this is with a d2 ohm speaker seriesed to 1 ohm and a d.5 paralell to 1 ohm. my voltage was dropping about 12.2v from 13.1
very happy with this amp. i am going to try to drop the impedience of my coils and see what happens, I will post when that happens. POI my usual volume is 29 for burp and now it is vol 13???? WTF we tested the h/u output and it was like .4vac will put a line driver in this week and do some more testing this weekend with different input voltages,.
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quote:Originally posted by kraven moorehead: amp at half gain h/u vol 10 139.3 v ac 49.1 aca 6880 watts @ 2.8 rise vol 12 162.1 v ac 52.3aca 8477 watts @3 ohm 160,1 db vol 13 163.5 v ac 52.4 aca 8540 watts @ 3.1 ohm 160.1 db
this is with a d2 ohm speaker seriesed to 1 ohm and a d.5 paralell to 1 ohm. my voltage was dropping about 12.2v from 13.1
I am not sure what you mean when you say d2 ohm series to 1 ohm, it would be 4 ohm in series. Same with a D.5 in parallel would be .25 ohm.
But if you were running this amp at the rated impedence of 1 ohm and it does not produce at least the rated power of 14kw thats not good.
I like Stetsom amps more than most and it don't make me happy to see these results. I run my 7k2D's at 1 ohm, 18volt and I get 9.2kw-10kw from them depending on temperature. If I load them to .5 ohm for a burp I get 13kw+ from them. So you see the 14kw should totally blow the 7k2D out of the watt-er
I will keep my eye out for more tests. Thanks Steve.
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His testing was on 12.2v not 18v. And his impedance rise was 3ohms. So for 12v and 3 ohms I'd say pretty damn good. Considering I just tested a 7k2d with 1ohms rising to 2.5ohms on 12v even and 6700w.
Posts: 1770 | From: elgin | Registered: Jan 2003
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posted
I know it was a 13.1 volt test But the amp is rated at 14kw at 13.8 volt @ 1 ohm before the ohm rise. My impedence rise is at 3 ohms too so thats not even a factor. I was just expecting at least close to rated power with sufficient batteries. But I may be jumping the gun here so I can wait till more tests are done. I will just stick to my 7k2D's till then.
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posted
Jeff it looks like you got the same amount of power out of the 7k2d as was produced by the 14kd on the same power and with the same rise??
Posts: 262 | From: indiana | Registered: Aug 2008
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posted
To me it would seem that the AC voltage is to high to be usable. Maybe the amp is clipping it self. That could explain the high output voltage and lack of amp's. Unless they have realy changed the way they built the amps the AC voltage shouldt change all that much with a incress in current.
Do these amps have clipping lights like the old one's ?
Also are these a 12 volt version or 16 volt version that you are testing ?
posted
steve had 2 differnt subs with his test one reads dual 2ohm and one was dual .5 that was the reason why one is "series" and "parallel" 2 get the 1ohm load.
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posted
^^^^Yes but the way he states it he seriesed a 2 ohm speaker and got one ohm. He just got them backwards and ment paralell the dual 2 and series the dual .5:)
Posts: 262 | From: indiana | Registered: Aug 2008
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quote:Originally posted by PeteS: To me it would seem that the AC voltage is to high to be usable. Maybe the amp is clipping it self. That could explain the high output voltage and lack of amp's. Unless they have realy changed the way they built the amps the AC voltage shouldt change all that much with a incress in current. Do these amps have clipping lights like the old one's ?
quote:Originally posted by clkwrkorg36: ac voltage is too high? and lack of amps? i would imagine that's a function of impedance rise.
Hey Ryan, I also thought the high voltage and low amps was the resistance that the box was putting on the subs. In other words box rise!
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posted
sorry for the mix up on terms just stupid i guess.....i know the difference. and 8540 is a long way from 6700 or my math sucks too. thanks for the advice Ryan and i will try the gain at a quarter and an eighth to see if there is a gain. i was concerned that i was only seeing .4v from the head unit that iss the reason i was going to try a line driver in there, so you think that is enough input voltage......yes these are a 12v version as far as i know there isnt a 16v version yet and it is a completely new board. I have always had a high impedience rise because my box was made for music,my car is a daily driver and i was hammering music with these amps as well a burping. i want to change my box so it will be more efficient but i am afraid i will loose my musical ability. my box is 27 cubic feet with a 461 sq in port with no depth if you have seen my car you know it plays music well. i will take all you pros advice and do some more testing to see what they can produce. I ran the 7kd's 1st gen and this amp is waaaaaay stronger. I wish that there was someone up this way with a spl car that we could use to test these amps and see the true power that they produce, but i am the only one here in maryland doing over a 60 unless you count big jim and we havent seen him in two years so these are my tests........i have a buddie testing in a street application wonder if he will show his numbers on here????
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posted
thanks Don i hope to see some gains over the 7kd's but these are new and i have to find the sweet spot....I know it is there and i havent found it yet. As soon as i do i will share my results......
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And I know this question is going to come up: Yes the stetsom test was done with the same exact setup as the CS elite 12.
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quote:Originally posted by audioarsonal: Jeff it looks like you got the same amount of power out of the 7k2d as was produced by the 14kd on the same power and with the same rise??
6700w and 8500w isn't the same last I checked. And the 7k2d I tested was a modified 7k2d good for an extra 1000w.
Posts: 1770 | From: elgin | Registered: Jan 2003
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posted
Jeff and I both tested the 7k2d, neither one of us came up with 8500 watts of power.
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quote:Originally posted by clkwrkorg36: i think around 8.5k is what two group 31 batteries will do.
Maybe. But i know people who get 8,5kw out of an elt12 on 1 Oddysee 1750. And isnt it interesting to know what that kind of amplifiers doing in street aplications? Maybe it will do more when you put more current in it. But that meens it isnt a very efficient amplifier.
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quote:Originally posted by clkwrkorg36: i think around 8.5k is what two group 31 batteries will do.
Maybe. But i know people who get 8,5kw out of an elt12 on 1 Oddysee 1750. And isnt it interesting to know what that kind of amplifiers doing in street aplications? Maybe it will do more when you put more current in it. But that meens it isnt a very efficient amplifier.
What's the secret to getting 8500w on a elite 12 on a street A battery? Most we can get over here on a CS elite 12 is about 5500w at .5ohms rising to 1.7ohms and any lower in impedance is same power.
How can we get 3000w more watts out of the same battery as you? Any suggestions would be appreciated.
Posts: 1770 | From: elgin | Registered: Jan 2003
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posted
waiting for answer???????????? Dayum this is getting interesting.......
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