2. amps-preamps
  3. 1116333757

Question for First Sound Owners

I currently have a first sound deluxe mkII. I'm thinking of replacing my Jadis DA-8 amp. I recently tried a conrad johnson amp and they did not match. The sound was congested and lifeless. I have heard the CJ amp sounding good so I guess this is more of a matching issue. In this regard, i'd like to know what amps you guys are using so i can avoid purchasing something that will not match the FS. TIA.
eps

Showing 1 response by kevinzoe

kevinzoe
167 posts
 
Just one more idea that hasn't yet been mentioned which is to check the input impedance on the CJ amp . . . The output impedance of the FS is rather high and if my memory is correct it is about 1700 ohms. So using a rule of thumb between preamp output impedance and amp input impedance of 50:1 or even better yet 100:1 then your CJ input impedance would need to be 85K or 170K respectively.

I have used VTL ST-150 with an input impedance of 100K ohms and currently an Art Audio PX25 amp with great results.
More to discover