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McIntosh and Thiels

Category: Amplifiers

HI
I have MA 6900 on dealer loan. The cables and IC (RCA) are transparent Super MM technology. Jolida 100cd player. Speakers Thiel 2.3.
What I expierience is too soft and unfocused sound. The highs don't shine the way I would expect. They seem to be cut-out prematurely. I would even say now the set-up is high frequency shy. Everything is somewhat bloated and datails are not so obvious. Bass is soft and do not attack the way I expected. All that combine to relaxed but not engaging presentation especially in low volume levels. I tried different IC's and speaker cables but basicly it was the same.
This is all very strange to me. Prior Mac I suffered a little too much HF but bass region was better. I powered Thiels with some 6year old Pioneer HT reciver. I am realy confused. I also tried Musical Fiedelity A308 itegrated. The high frequences were awfully bright and the sound was too thin. How can this be possible that Pioneer seems better than MAC and MF? Pioneer is connected thru power transformer that changes 220 V to 110 V because it is a US version And I live in Europe (220V). Is it possible that power transformer gives pioneer advantage - MAC is connected directly to the wall.
I realy like the idea of owning MAC 6900. But now I do not think I can explain the huge cost of it given so little improvments and more drawbacks.
May be I am doing something wrong. May be someone can comment on this and help me out.
Is Mac realy softening the sound to a degree where a datail is there but bearly audiable? I can not help but feel that way. With pioneer in action I could hear IC and Speaker cable changes very clear. Now with Mac I can hear some but not so obviously.
Please Mac and Thiel owners do help me!
bunkeromantik
artmaltman
769 posts
 
Some ideas:
1. How much power does the Mac produce? The 2.3's need at least 100wpc to really shine, and more is better.
2. Got a decent power cord on the Mac? 10 gauge or wider is important.
3. Are the 2.3's broken in? My 2.3's had no bass at all for the first 10 hours, then loose bass for the next 100 or so before tightening up.
4. Is the Mac an integrated or are you using a preamp? If the latter, please check output impedence of preamp compared to input impedence of the amp.
Art
bunkeromantik OP
38 posts
 
I have Thiels for +2 years and they are broken in.
Mac is 200 watt in 2, 4, 8 ohm load (autoformers)
I use it as an integrated amp.
I did not change the stock MacIntosh power cord. I did not hear much of a difference changing 1500$ Transparent speaker cables for plain wires so I did not think power cord can help. That set-up with Mac lost analitical properities. Everything seems the same. I used to hear clearly difference in quality of the recordings. Some were great sounding some were terrible to listen to. Now there are differences but not so obvious. I realy need the sound to open up and shine. It is closed in and dull.
May be my listenig room is to small? 4 x 5 x 2,4 meter ( 12 x 15 x 8 feet)
zoya
119 posts
 
If you sound is unfocued, check if your speakers are in-phase. Everything you describe sounds like your speakers connected out-of-phase. Your Mc should give you pleanty of lows and Highs.
Good luck, Zoya.
Ag insider logo xs@2x
drubin
3,240 posts
 
The 6900 has some tone control/equalization functions built in. Is there a chance they are engaged and are causing some of problems you hear? With Thiels, a lack of focus and too-soft highs is almost unimaginable.
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