Preamp Input for Coincident system - Don Sachs, deHavilland, LTA, Joule Electra?


Hi all, I'm looking to spend around 2k on a pre-amp (either new or used) to pair with my Coincident PREs (currently using their Frankenstein mono-blocks as amps; input impedance of 100kOhms). 

I'm looking for something very natural sounding, with good body, some warmth, and -importantly- it must have a remote.  The PREs are very sensitive up on top, so I need clean highs. 

I've been reading a lot of threads and have a few contenders.  Am hoping to solicit some input from anyone who might have compared the following (with PROs / CONs listed):

1.  Don Sachs SP14 - good reviews, available in budget new / long wait to get a unit
2.  LTA MZ2 - some awesome reviews, available with 10-day trial period / some "meh" revies, perhaps a bit of a "clean" sound?
3.  deHavilland  UltraVerve 3 - good reviews mentioning the "relaxing" nature - a good key word for me / new it is out of budget at 3k
4. Joule Electra LA-150 MKII - in budget used, reviews mention strengths in "tone" & "texture" - highly desirable for me / a fairly old product  

Other things to note... 

I'm currently running a PS Audio PW DAC directly to my amps and listen to all types of music; perhaps currently tilted towards "modern" music with electronica and indie influences.  I stream Tidal via ethernet via PS Audio's Bridge II card in the dac.  

While I'm sure others will criticize the DAC, I really like the PWD and it has compared favorably to both a DirectStream (the music became less natural and more analytical) and Lyngdorf TDAI 3400 (the music was very smooth, but slightly less natural with a less well delineated soundstage). 

Unfortunately, the PWD has a bad volume control (throwing away bits at under 50% volume) and the new PREs really show that distortion off.  As such, I don't like listening at low volumes... hence the desire to add a pre-amp. 

Also, obviously I'd love to get Coincident's 101D pre-amp, but I need the remote, so it doesn't work for me.  I tracked the remote version for a long time and was hoping to save up money to purchase, but apparently it was plagued by technical difficulties and often needed service (presumably that's the reason Isreal discontinued it). 

Appreciate any input.

- Chris
128x128cal3713

Showing 1 response by mresseguie

Chris,

Hello. I only just now discovered this thread. 

Allow me to offer you a belated congratulations on acquiring one of Don's Model 2 preamps. I'm not at all surprised you've enjoyed its sound. I'd like to ask you for a little more information concerning the mods you made.

 "As an update, I’m currently running a heavily modified don sachs ds2 6sn7 preamp. Over the past year and a half of ownership I’ve replaced the stock capacitors with Duelund tinned copper CASTs on my main output, mundorf supremes on the secondary subwoofer output, replaced the input and output RCAs with pure silver wbt connectors, replaced all signal wire with 99.999% pure solid core silver, and placed a copper shield over the power supply."

Did you perform the mods all at the same time, or piecemeal so that you could hear differences each time?
If you made the changes one at a time, which mod made the biggest positive change for you?
Did any of the mods make little or no difference?
Which would you recommend as a first mod?

So here's a little background on my Model 2 preamps. Earlier this year, I bought Don's newest rendition because I was intensely curious about how it sounds compared to the one I bought in 2015. [I just had to buy it. I'm sure you understand.] The new one has the Polish caps in the first out to best pair to my Kootenay 120. [I have no plans to mod this unit.] I may be persuaded to make some mods to my older Model 2 preamp. It's got the left and right gain dials and the original 6AX5 rectifier tube. The main out caps are Jupiter Cu, and ??? caps for subwoofer out. [Yeah, I lost track of what they are, but I'll eventually open up the bottom panel to refresh my memory.] Anyway, I can ask a friend to help me with the rectifier change. I've wondered about mods like the ones above, but never actually got serious about it because I absolutely love its sound. I'm interested in the changes you experienced as a result of the changes you made.

I look forward to your reply.

Regards,

Michael