Nixxuz
Super Member
TO EDIT: Apparently I'm not using the correct terminology. It's a balance and gain issue.
How is biamping in regards to imaging and bias? I'm asking because I got a monster of a pro audio amp that's EXTREMELY loud. I'm still messing with all the different configs because I have 4 different volume levels to deal with already. The configuration is as follows below with a pair of Jamo C-109 towers for my L/R.
So one of my thoughts is to run my previous power amp, a Dayton APA-150, as a semi isolated unit at full bore to the 109s HF posts. That way I at least KNOW that the volume will be consistent across the HF range for imaging. The QSC might have a db or 2 of variation across the LF, but seeing as I don't know the crossover range for the 109s, I'm not really sure how it will turn out.
Last option would be to just get another APA-150, (I sold the 2nd one I had when I got the QSC) and monoblock the 109s. Then I'm pretty much rid of any biasing issues that I'm getting now with the QSC. I have no real idea what to do with the QSC though...I suppose I could monoblock it for a DIY Ultimax build or something.
Any thoughts?
How is biamping in regards to imaging and bias? I'm asking because I got a monster of a pro audio amp that's EXTREMELY loud. I'm still messing with all the different configs because I have 4 different volume levels to deal with already. The configuration is as follows below with a pair of Jamo C-109 towers for my L/R.
- Source- a tablet running Android with PowerAmp. This has a handy touchscreen volume wheel and EQ that I can adjust from my listening position. It's also where I store all my digital music and it runs out to a DAC X-6. I tried a W10 laptop, but for some reason every program wouldn't let me adjust the volume.
- Little Dot Mk2 as a preamp. This is wanted, but almost needed, because the power amp is pro audio and I kind of have to boost the signal anyway, due to the higher output of most pro sources.
- QSC ISA280 power amp. This guy has TONS of volume to offer, and can easily take 2-8 ohm loads in stereo. My inclination was to crank both channels all the way up and handle everything from the Little Dot and the tablet...but the sheer output is EXTREMELY touchy. Like a tiny increment on the volume from either device can cause it to go from 65db to 90db VERY FAST. So I have to set the volume lower than max. This poses a bit of a problem because I don't think the pots on this unit are quite level. One channel almost always seems slightly louder than the other, which becomes a huge pain when you are looking for that spot on imaging that the Jamos are capable of. Instead, it ends up sounding like 2 speakers projecting sound instead of 1 large stage with individual players. I've tested this over multiple songs that I am very familiar with and can't quite peg it to where it's transparent.
So one of my thoughts is to run my previous power amp, a Dayton APA-150, as a semi isolated unit at full bore to the 109s HF posts. That way I at least KNOW that the volume will be consistent across the HF range for imaging. The QSC might have a db or 2 of variation across the LF, but seeing as I don't know the crossover range for the 109s, I'm not really sure how it will turn out.
Last option would be to just get another APA-150, (I sold the 2nd one I had when I got the QSC) and monoblock the 109s. Then I'm pretty much rid of any biasing issues that I'm getting now with the QSC. I have no real idea what to do with the QSC though...I suppose I could monoblock it for a DIY Ultimax build or something.
Any thoughts?
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