Hi, I'm new to this forum so I will introduce myself before going into the subject.
I'm Jaap, 48 years and working in the entertainment industry as a stagehand/stagebuilder. I'm also a part time photographer (who isn't these days ;-)
Although music is my life (and my job), and I have always had a decent installation in both my car and at home, I only recently got into the 'high end' audio.
In fact it started at a photography job I got at a MBL demo in a high end audio store in Belgium. They had multiple setups , up to the giant reference set (with the ugly black/gold components, matter of taste I presume) and the huge omnidirectional speakertowers. While doing my job as a photographer, I also joined the lsitening session and was impressed. I never heard music like this , apart maybe from live accoustic sessions, So I decided to get my own high end set.
I already owned a pair of B&W 802N's, driven by two Vincent 331's in bi-amp mode. According to some reviews, the Vincents should sound as well as amps way above their price level but when I started my search for better amps, I found out that this claim was exaggerated, and not even mildly.
I listened to many systems; Krell (KAS 2), Pass Labs 250.5, temporarely owned a pair of Mark Levinson's 20.6 monoblocks (with which I had a hard time finding the right preamp for them), I found many differnces in sound signature, and price levels of course and wasn't able to find a set I both loved and could afford. Until one day I was visiting a friend who had the same B&W speakers and had borrowed a set from a friend to put up for sale. This set was a Burmester 061, 035 and a 911MK3. I was immediately sold. This was definitely the soud I was lookig for and although the price was still above my budget (or rather what I wanted to spend), the price was a bargain compared to the new price (10.000 euro for the whole set ,which was 6 years old). So I didn't hesitate and bought it.
While very happy with the sound, after a while I wanted more (of course). So I upgraded my speakers to a pair of 800D's, this definitely improved the bass and depth of the sound. Then after reading many fora and reviews I learned that an extra 911 would be the way to go next. So I did.
I found a pre owned 911 at a Burmester dealer and bought it together with two mono adapters (original Burmester silver) to bridge my stereo configured 911's.
That is when the problems started. Yes, I got more power, bigger soundstage, even more bass and depth but somehow the balance in the sound seemed off. Also the dynamics seemed to suffer. Where before I turned the volume to listening level and never felt the need to adjust it (unless I changed the CD of course). Now suddenly the louder parts in a song made me run for the remote to turn it down. Mainly because some oversteering seemed to happen in the high frequency range. I also noticed that some hiss/noise (no hum) was coming from the tweeters when no music was playing. Before there was also a slight hiss, but only audible when you put your ear right next to the tweeter.
After discussing the problem with the Burmester dealer (he even visited me), he concluded that my preamp was causing the problem. And while I was selling off my surround gear anyway bc it didn't add much to the great sound I got from my stereosystem, he made me a great deal, all my surround stuff + my 035 and 061 (and some extra cash) for a brand new Burmester 111!
When I got it and installed it (together with the dealer), the problem remained. The dealer could hear it too, but the only solution he could think of was a problem with the power distribution so he gave me furutech power distributor in exchange for a pair of (now obsolete) Burmester silver interlinks. Again, a good eal but it didn't solve the problem.
Because the dealer couldn't provide an explanation for the problem , I tried to do some research myself. Problem is, although I work with professional audio, I have no technical education or background so most terms and specs have little or no meaning to me. What I did notice however when I compared the spec sheets of the various Burmester preamps is that while the 088 and 077 which are often used in combination with 2 911's in the reviews have an output voltage of 24 volts, the 035 and 111 provide only 12 volts of output (even though the 111 has an 077 built in). I wonder if this might be tthe cause of the problem. I mailed Burmester about this but they claim it shouldn't be a problem at all and that they use this setup regularly in demo's.
Does anyone here know what might be the problem with my system and/or is my theory about the voltage output right?
My setup is as follows; Burmester 111 connected to 2 911's mono bridged by Burmester silver mono adapters with a Burmester silver XLR extension interlink to the Burmester 111.
BTW , I also tried bi-amping with regular XLR splitters, which reduced the problem but at the cost of the power, definition and other benefits I had with the dual mono. The only real solution so far is connecting the 111 to one 911. Which gives me back the sound I loved with my initial configuration, the balance and dynamics are back and more defintion (I think) probably bc of the superiour preamp/dac of the 111 compared to the 061 + 035. But hardly justifies my expensive upgrade path.