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using a power amp

gilbert46

gilbert46

Sep 21, 2004
369
0
45
Sacramento, CA
#1
quick couple simple questions about power amps I havnt been able to answer online.

1 Do the channels need to be used at the same ohms - ie - can you put a 4 and 8 ohm cab on each channel ?

I ask because im either replacing my hartke 410 or replacing the aluminum speakers in it, and can go with a 2, 4, or 8 ohm total. Its wired 8 right now, and my benz 115 is 8 to give me 4 total.
 
#2
The 2 channels of a stereo amp are seperate, you can run 4 in one side, 8 on the other.

If you're amp will run bridged and take a 4 ohm load, bridging with 2 8 ohm speakers gets you the most power out of the amp. Be careful though. If each channel doesn't go down to 2 ohms, the bridge output won't go to 4 ohms, you'll blow the amp pushing it hard like that. Keeping the 410 at 8 ohms gives you the option of bridging later when you do get an amp capable of that.

Randy
 
#4
I have another question. The input on this amp is XLR, so should i get a DI, or some type of preamp with an xlr out, or just pick up a 1/4 to xlr and be done with it.

Will the adapter cable cut my signal much? Ive got a me50b and a retro onboard preamp, so I imagine I'll have plenty of signal strenght between the 2 so long as the adapter doesnt do anything funny.
 
#5
I find using adapters is a good way to add noise to your signal. If possible I would use a DI/Preamp with XLR out (most models have this feature I belive). If your not able to do that an adapter will work, but you will get some degredation of signal quality. Weather or not its too much is for your ears to decide.
 
#7
Im reviving this thread. My amp is a crown XLS 402. Im looking to bridge it. The manual says to use a y cable to split the signal and invert the second channel. Where would I find a cable like this, or do the off the shelf cables have one channel inverted.
 
#8
You'll probably have to make one or modify an existing one. I've never seen an off-the-shelf Y cable that inverted polarity on one side, possibly because the applications for one would be very, very few and far between. You should contact Crown; maybe they would know of a source.
 

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