JBL 6230 Owners here?

Hey Hey,

i am a newbie who recently got into Audio and who just discovered this nice board here :) I got myself a JBL 6230 and some 4311´s which I recently recapped. Sound is awesome, detailled and cristal clear but never too much. I use a Bozak CMA as a pre-amp. Since I had this amp, I´ve always used it with a power conditioner. It was dead quite - I now changed the setup and use the conditioner now for my dvd player. With the 6230 turned on now, I can hear a faint sizzling-buzzing sound. I never heard that sound before, could that be because i stopped using the conditioner and is that something i would have to expect from an old amp like the 6230? I´ve recently read that i´m better off not using the condironer for amps because of the 0,5 output it has? Not sure what that means but yea, i thought maybe you guys can help. My friend also has a 6230 and hears sizzling/buzzing sounds. We both live in 120 year old houses with old electrics - could this be a reason?

Also, i really can´t hear any difference when i hook up my Marantz 2270, what is wrong with me? Can a pro amp like that be compared to classic hi-fi amps/receiver ?

cheers!
marmelbirne

Whether anyone hears a difference between amps depends on a lot of things. Don't be embarrassed about enjoying the sound of the 6230; it's a nice amp. It is a later design than the Marantz, from the days when there was a heightened awareness of the negative effects of transient intermodulation distortion, so it might even be better.

I don't think I know enough about balancing various pieces of equipment in a system, and your description of the problem means little to me except that you might be having two separate problems. But. . .1) using both a preamp and an amp with input sensitivity adjustment you have to consider "gain structure"; 2) the tweeter in the 4311 may be a little peaky, which would make matters worse; 3) the 62XX series of amps can evince transformer buzz, which you will hear directly, not through the speakers, sometimes with a sympathetic buzz in the case lid; 4)—last and most likely—the conditioner you moved to another spot may have been solving a ground loop which you are now experiencing.