2. amps-preamps
  3. 1333909767

Need info on amp rec. for these Thiel cs2.4's

Ok, this is my last attempt before I have Crutchfield take the speakers back.

let me say that when things on these speakers sound right it trully is amazing. On most other average CD recordings though the speakers sound tends towards the brighter side. I just recently purchased a NAD M51 DAC and it helped and is a first rate piece of equipent - I have a review on Audiogon if your interested. However, while Im generally happy with the speakers I think either I need to change the amp or get a CJ preamp - ET2 (or similar). Im using the NAD to drive the Amp (a Vincent sp331 - 150 @ 8 ohms and 300 at 4 ohms) directly so no preamp at this time. I hooked up my friends 5082 Adcom for kicks and the treble is good there, but there is no space or dimension to the music. Thus my thoughts on changing the amp. Its flat. He also has a VTL 2.5 preamp that helps by the virtue that it is a tube piece and helps plump up the mids while softening the highs (thus my thoughts of CJ preamp). However sticking a piece of equipment in between the source and amp seems like a backwards step.

Im dedicated to at most $3500 dollars to bring the system in line for the hights. Problem is I have nowhere near me that I can go to listen to the equipment before purchase so its all online for me, so I'd need to be able to puchase it that way. Im not a big fan of used but I could go there if necessary.

Some thoughts on amps:

Channel Islands d200 MKII
Parasound Halo 21

Preamp thoughts:

CJ ET-2
Rogue 99

What my thoughts on what the amp should do is be warm, solid state, not emphsize the highs obviously, balanced or unbalanced, and have at leat near if not more that 300w into 4 ohms. I've heard dampening is important with Thiels but not sure what the numbers mean.

Please any thoughts would be appreciated on my situation here.

My urgency in this is I have till May 17th before I need to tell Crutchfield to take them back.

Now I do really like the speakers and I know many people will tell me to do just that - they are so close to being "there"! But let's use that as a last resort on info here b/c I know I have that option.
last_lemming

Showing 2 responses by tonywinsc

tonywinsc
583 posts
 
Like you said, the Thiels can sound truly amazing when everything is right. They are clear windows looking back to your source. If the source or the amplification chain is compromised, then you will clearly hear it with the Thiels. Don't shoot the messenger. I submit that the main problem may be driving your amp directly with the A/D box. This is just a thought- the DAC may not have enough output and/or the optimum output impedance to match your amplifier. That may be making the highs sound too shrill or perhaps the bass is underpowered. A good preamp will match impedances better going into the amp as well as give you better volume control. You really will not loose anything with a good preamp in the chain.
One other thing- in general, tubes do not really roll off highs or accent mids, except for when they are badly worn. A good preamp, be it tube amplified or SS, is a good preamp. Each has their own sonic signature, but tube preamps and amps can be further varied by type and brand of tubes used. And then, yes the characteristic highs can be altered. That is added complexity that can get frustrating. Some days you might like the sound of one tube, but then pop different tubes in and suddenly like that better. Then one day you won't like the sound of those tubes due to air temp, mood, etc and go back to a different set of tubes. A real merry-go-round of delight.
tonywinsc
583 posts
 
I must agree that the Thiels are demanding speakers and it takes the right amplifier to make them sound their best. In general, they require an amp with high current capability. As a rule of thumb, a SS amplifier that doubles power output as impedence is halved down to 2 Ohms has high current capability. My experince early on with Thiel speakers proved this rule. The amplifier that I was using with my old planar speakers, which sounded great, did not work so well with the Thiels. (The planars were a pure resistive load.) People on the 'gon use tube amps with Thiels too, I just have no experience with that combo. Once I found the amp that I have now, I did not need to keep searching.
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