Originally Posted by tsloms
So I have my BMS 4594 on the XR1464 horn and TD10X TMM speakers all finished up and am powering them with Crown XTI4002 on the woofers and XTI2002 on the 16 ohm 4594 through the BMS xo. I need to post pics of these soon!
They sound just incredible so far but I'm getting a bit of hiss on the horns with no input or even with the inputs shorted together.
What are my options in order to slink oat this hiss or at least greatly reduce it? Would a MiniDSP and different amp work better?
Get a smaller amp for the tweeters.
Your BMS 4594 has 118 dB sensitivity.
Your TD10X has : 92dB sensitivity.
Ask your third grader to subtract the two, because obviously you haven't! ;-)
OK, I'll take pity on you, the difference is 26 dB. ;-)
That is a power difference of 400 to 1. Four freaking hundred to one (1)!!!!!
Depending what the wavegude does to the sensitivity of the horn driver (might even knock off 10 dB), the tweeter amp that compares with your woofer amp would be something like a XTi0100, if Crown made such a thing.! In all seriousness, a 50-100 watt amp for the tweeter would give you a ton of headroom.
Active speaker design 101: Size the power amps for the efficiency of the drivers, at least just a little. 2:1 doesn't make it when you are using speakers whose efficiency is 400:1 different.
Think of it this way, you need a motobike motor for the tweeter, and you put in a 800 HP NASCAR Sprint Cup engine, and now you are complaining about it being loud at idle. ;-)