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Tell me what you all think about this one. I was installing a system into my 94 suzuki sidekick and went to a shop and bought a 1.25 cube sub box sealed and a Rockford he2 dvc 12 sub and a punch 250a2 and briged it all mono and the guy there said that it all would handle it monoed at 2 ohms and so then I went home and 5 days later the amp blew hardcore. Subs fine but the amp is toasted. the power supply went out. So I take it back and the guy there says that the amp isn't designed for 2 ohms and says that he will warranty it and sends it back and tell me to come back in 3 days, so I come back in three days and he says that it isn't in and rockford says to use a power 360a2 instead and that will cost me another $100, so I decide on getting that but it hasn't came in yet, so do you all think it was just bad advice or the guy is stupid or he is trying to screw me???? Thanks for the help.
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posted
In my opinion, since the power supply was gone in your amp, it was probably due to input voltage problems, not the load is was running(although this didn't help). I would check all the wiring (8guage minimum for power and ground), all the connections, load test the battery and alternator, and see if something is amiss. You may need to do a little upgrading. You can have the best amp in the world but if it can't get the current/voltage that it needs, your gonna have problems.
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Damn, a voltage drop can do that?!? That kinda worries me cause when I crank it everything dims in my car, I mean it all almost goes out. I have a 360a2 at 1ohm mono on my shocker 15", shoudl I be concerned? I'm gonna be switching amps to a cfa1000d. WIll that draw less current?
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quote:Originally posted by InvisibleBass: Damn, a voltage drop can do that?!? That kinda worries me cause when I crank it everything dims in my car, I mean it all almost goes out. I have a 360a2 at 1ohm mono on my shocker 15", shoudl I be concerned? I'm gonna be switching amps to a cfa1000d. WIll that draw less current?
Well the 1000 is a class d so its more efficient than the rockford, but it also puts out more power than the rockford. here are some aprox numbers
rf360 at 1 ohm, (actually seeing 2+ in the box)
output-aprox 600 watts at 50 % efficiency = 1200 watts of input at 12 volts=100 amps max current draw(you will probably NEVER see this with music playing)
crossfire 1000d at the same load
output- approx 1100 watts at 75% efficiency = 1466. watts of input at 12 volts = 122 amps of draw (again you will probably NEVER see this much draw with music playing)
So yes the 1000 is more efficient but will still draw more power at max. But under listening conditions it will be easier on your charging system. And it will definately like that load more than the 360.
And it has nothing to do with the brands specified...
Class D amps are actually only significantly superior in efficiency to Class A/B amps at FULL volume. At partial power they may be LESS efficient. No kidding...
Supposedly, the RF bd1000a1 has higher efficiency across the range - since I have not played extensively with one I cannot substantiate this though
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And it has nothing to do with the brands specified...
Class D amps are actually only significantly superior in efficiency to Class A/B amps at FULL volume. At partial power they may be LESS efficient. No kidding...
Supposedly, the RF bd1000a1 has higher efficiency across the range - since I have not played extensively with one I cannot substantiate this though
Damn, I didn't know that. I have never tested a class D except at full tilt, so It never occurred to me that their efficiency was lower at lower output voltages. I do believe that the new DX line of Kicker amps are like the bd1000 then, I war reading a dealer update about them a couple weeks ago, and it showed their efficiency at full power and 1/3 power , both near 80%. I just assumed that was normal for a class D, but you learn something new everyday.
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