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  Why does my new tube amp and preamp sound so bad?
Hi: I am brand new to audiogon but I would appreciate any ideas you folks may have. I am a seasoned audiophile with only SS experience. I have wanted to try the "tube" sound for awhile but have just now been able to afford it so I put together a new tube based system along side of my SS. I purchased a used set of Klipsch La Scalas and restored them and powered them via my Adcom amp and preamp. The speakers sounded excellent, great bass! All right, next step after much internet research, but without hearing, I purchased a new Cary Rocket 88R amp and a AES (Cary)AE-3 DJH preamp. There are no Cary dealers within 200 miles of where I live (I know dumb mistake!)Hooked the system up and it sounds terrible. Well I thought the tubes just needed breaking in. After 100 hours no better. The sound lacks any bass and it is very "tinney". It sounds as if a low frequency roll-off filter is present. I contacted Cary and they said substitute the AE-3 for my Adcom preamp. I did and there was an immediate improvement. Cary had me ship the preamp back and they checked it out and could not find anything wrong. I put it back into the system with the same results. Does anybody have any ideas? Could tube rolling be the answer? I have tried different interconnects which made no difference. With all things being the same the Cary preamp sounds terrrible when compared to the SS Adcom. I am having a hard time believing it is natural that the 15 year old Adcom smokes the Cary. I am a fairly competent electrical engineer and I believe the tube setup (bias) is correct. I would appreciate any help. Thanks, Larry K.
Lkitchell  (Threads | Answers | This Thread)

06-22-05
  Responses (1-23 of 23)
Click title to read one, or click date to read all below it.

06-22-05   klipsch la scalas: i have a feeling they need to be placed ...   Schipo

06-22-05   The sound you describe is nothing like my experience with ca ...   Tomryan

06-22-05   Schipo,how can it be the room when before replacing the adco ...   Bigjoe

06-22-05   Did you actually play music through the preamp for 100 hours ...   Tafka_steve

06-22-05   Hello. a tube amp willnot have the lowend of solid state amp ...   illenema1@

06-22-05   Hi larry, i also have a cary pre, slp98, when i first put it ...   Rwjp

06-22-05   If you are encouraged enough to go further with a complete t ...   Hifiharv

06-22-05   Any time a new piece of gear or a change in gear speaker's m ...   Schipo

06-23-05: Boa2
The La Scala's (we own them as well) sound completely different depending upon placement. Even when swapping between the two different tube amps that we have, I have to adjust the speakers to optimize the sound. Still, we use an active sub, as 53Hz is not so low. Try moving the speakers around a bit, experiment with the spacing & toe-in. We have not toed ours in at all, for example.

I also think that NOS tubes add a richness and depth that most modern production tubes (especially preamp tubes) cannot match. Tinny and thin is exactly the way I would describe many of the current tubes.

Sounds like the speaker cable switch will make a big improvement as well, as Rob mentioned above.

Best of luck,
Howard

Boa2  (Threads | Answers | This Thread)


06-23-05   I was thinking the same thing as rob and howard. you might ...   Creeper

06-23-05   illenema1@wmconnect.com says a tube preamp will not have ...   Ozzy62

06-23-05   From my experience, i've owned and audition over a dozen tub ...   S23chang

06-23-05   Lkitchel what a bummer. there is no way that adcom should o ...   Czbbcl

06-23-05   You people are wonderful. i will experiment with speaker pl ...   Lkitchell

06-23-05   If the gear checks out okay, then the only thing i can add i ...   Gs5556

06-23-05   Larry is the equipment brand new? if so maybe you are exper ...   Czbbcl

06-24-05   Maybe you simply don't like the sound? if everything checks ...   Pbb

06-24-05   Pbb if you are implying that electronics do not burn-in you ...   Czbbcl

06-24-05   Yeah, sure they really do burn-in and then go straight on th ...   Pbb

06-24-05   Pbb understood about straight to burn-out and agree althoug ...   Czbbcl

06-25-05   So far as bass goes, i never felt cary was the last word in ...   Tubegroover

06-25-05   Tubegroover, imo, the bass on my cary v12i with stock tubes ...   Clio09

06-25-05   Clio09 i have heard the v12 cary although i must say in onl ...   Tubegroover


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