keyboard preamp

[rodbox5]

I'm conecting my keyboard aux out directly to the line level input on a powered mixer (sterio super HI Z) and am encountering the following problems:

1. Relitively low volume
2. Annoying hum
3. Hum gets much louder past one third volume on channel level control.

Before I start chopping out frequency, would inserting a good pre-amp in the line prior to the powered mixer help? Any suggestions? - sorry but I'm new to keyboards and was expecting the output to be pre-amped.

 

[Chili]

Make sure you're using an instrument cable. These will be shielded to reduce interference.
Check that the Hi-Z input on the mixer is indeed Line Level. Sometimes Hi-Z is used for guitars and not line level.
Try using the main outs on the keyboard instead of aux outs.
Check everything against the manuals for both the keyboard and mixer. Make sure you've got it all connected properly with the proper cables.
If it's all working correctly, you would not need to 'chop' frequencies to eliminate the hum.

good luck.

 

[rodbox5]

Checked everything out to no avail. in the end, I borrowed a multipurpose M-Audio pre-amp from a friend and hey presto - problems fixed!

Lots more volume, no hum and much nicer sound. Can't say it makes any sense - but I'll go with whatever works!