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I have B&W htm1 center,cdm-nt9 front, cdm-nt 7 rear. Adcom 7500 (5 by 150) amp and Adcom pre amp. Mids and highs are harsh from mid volume on up. Could this be due to cheap rca cables? ( I have Radio Shack's best!) Front and center speaker cables are big....the size of car battery cables. The wires inside look to be about 14 guage. I paid about 5.00 per ft.....not sure what brand. Rear speaker cable is Monster 14 guage. Front speaker cables are about 8 ft long....rears are about 25 ft. Music source is usually Comcast Cable digital music channels or 250.00 Denon CD player. So, is it cheap rca's, cheap speaker cables, all of the above, or none of the above? There are ton of cables with a 5 channel system and I do not want to spend a lot of $$$ and not hear the difference. If new rca/speaker cable is the answer, what would you recommend?
Also, I have seen power cables discussed here. Is that the power cable from the amp to the wall outlet? Am I to beleive that matters too?
I asked these questions at my local high end store and was told I need new cables. Another said I need a new amp, possibly Rotel, and went on to say that beyond Radio Shack sheilded rca cable I would not see much improvement. I am forever the sceptic when talking with commissioned salespeople! I would like to know what people who play with sound systems for the love of it would have to say. Your comments are greatly appreciated.
John
baffled
nrchy's avatar
nrchy
2,124 posts
 
I have had rotel amps and have looked seriously at Adcom, and I don't know that there is much difference between the two within the line. Cables can make a big difference, but I would look at the source first. Cable merely transmit signal. Some do it better than others, but if you have harshness like you mention, it's more likely to be the Denon. Sorry!
Better cables might tame some of the harshness that is introduced by the cables, but better cables could sound even more harsh if the issue is the Denon. Borrow a CDP from a friend and see how much difference it makes. Less expensive gear is built around compromises, the ones you hear might be part of the design inadequecies of your gear, or the cables. It's difficult to point out the source of the problem without actually swapping things in and out.
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atagi
98 posts
 
do you have access to demo other amps/sources/cables? i would try to see what's causing the problem before investing any cash. home demo, buddies, local audio clubs could provide you an opportunity.

aloha keith
ajhcjmh1cef7
1 posts
 
Did not know about the home demo option for cables. The room is big (24 by 28). Sounded just as bad in a room half that size. As far as the source is concerned, I hear the same level of harshness whether it is the cable box or cd player. Based on what you guys have said, I suspect it is the cables. For my modest system what should I pay for a decent pair of six foot rca cables? I suppose there is a point of diminishing return. Thanks for all of your help.
vman71
218 posts
 
I had an Adcom preamp and Adcom amp (7500 also) combination before. I switched to a Sunfire preamp and Sunfire amp combination. I'm happier with the Sunfire vice the Adcom. The Adcom seemed to lack in overall strength/authority (amp) and my system sounded thin. The Sunfire is definately warmer and stronger sounding.

My speakers were and still are Klipsch Legends (horns) so they tend to be on the bright side. To get the mids and highs under control (at least for my system), NBS cables were the miracle answer. The mids were transformed and the highs were much more tolerable.

As others have noted, the source is important. I just switched from a modified Music Hall CD-25 to an EAD cdp. The sound again improved becoming smoother and much, much more analog sounding.

IMHO, NBS cables and the source would be a great start for you.

Mike
fife
50 posts
 
I think your main culprit is your Adomcom amp and CDP.

I dont think you Adcom 7500 is up to the task of driving any of your speakers properly. You are underpowered for sure.

Cabling is not the problem here.

Note: Be prepared to spend $ on amplification for your B&W's.

Good luck
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