2. analog
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if you had my system and $2,000 budgeted for an upgrade, where would you spend it?

This post may go a bit beyond analog, as it could encompass other parts of the system, but I am not interested in adding to the digital side of things, so here it is.

As far as I can tell, it seems like the places to spend that $2K would be on a better tonearm or perhaps a preamplifier upgrade.  I may be able to sell my Audio Research LS-25 and upgrade to ARC Ref 3.  As for the tonearm, I could sell the RB202 and get a Michell Tecnoarm, or step it up to an arm for about $1600 (are the Clearaudio arms nice?) and still have a little left over.

Can a tonearm upgrade make a significant sonic improvement?

I am not dying to spend money on an upgrade, and if the benefit of that $2K will be minuscule, I am happy to stay as I am for a while, my system sounds excellent.  But I am curious to know what the experienced people on this site would do the the $2K if they were in my shoes.

Where is the most improvement possible?
Thanks!
Mark

System Gear List:

Amplifier:  Audio Research VT-100 mkII
Preamplifier:  Audio Research LS-25
Phono Stage:  Whest Audio PS.30R
Cartridge:  Lyra Delos
Table:  Michell Engineering Tecnodec with standard RB202 tonearm
DAC:  PS Audio PerfectWave DAC mkII
Power Conditioner:  Shunyata Research Talos
Speakers:  Rockport Technologies Mira Monitors
Subwoofer:  Wisdom Audio SCS
Speaker Cable:  Cardas Audio Cross
Interconnect:  Cardas Audio 300B Microtwin XLR
Digital Music Storage & Player:  Apple Mac Mini + ROON + Hard Drive
Power Cables:  Shunyata Research Venom HC (amp, sub, conditioner)
Power Cables:  Shunyata Research Sidewinder VTX (sources)

My system can be seen here:  https://systems.audiogon.com/systems/5421
marktomaras
skoczylas's avatar
skoczylas
240 posts
 
I would pocket the money until you have a desire to change the speakers or amps - very nice system and great art on the walls. May i ask who makes the cabinet? 
czarivey
5,687 posts
 
I'd pick Technoarm and the rest would spend for music.
Technoarm has great wiring and definitely a big step up from RB202.

marktomaras OP
544 posts
 
Thank you everyone, for the thoughtful responses so far!

Alpha, I agree, be happy with what I've got!  Beer and vinyl sounds like a good move!

Almarg, excellent insight. I called Wisdom and the impedance is 25k.  Do I have any reason for concern there?

Totem, I have been contemplating some DIY room treatments. Where would you begin?

thanks all,
Mark
marktomaras OP
544 posts
 
skoczylas, I made the art and the cabinet!  If you're in the market for some interesting large format photography, give me a call!
http://www.marktomaras.com
almarg's avatar
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almarg
9,670 posts
 
I called Wisdom and the impedance is 25k.  Do I have any reason for concern there?
Good!  I've seen many other powered subs having line-level input impedances as low as 5K or 10K.

Also, fortunately, the input impedance of your power amp is quite high, assuming it is similar to that of the earlier pre-MkII version, which had an input impedance of 100K unbalanced and 200K balanced (presumably corresponding to 100K for each of the two signals in the balanced signal pair).

The parallel combination of 25K and 100K is an impedance of (25 x 100)/(25+100) = 20K, exactly corresponding to the recommended minimum load for the LS-25.  So not a problem!

If you are running a balanced cable to the power amp and an unbalanced cable to the sub, however, I'll add that there may be a very slight degradation in the ability of the power amp to reject "common mode" noise, due to the slight impedance imbalance that would result between the two legs of the balanced signal pair.  My suspicion, though, is that is unlikely to be an audibly significant effect in your setup.  But FWIW I'll mention that if you were to run (or already are running) XLR cables to the sub as well as to the power amp, that possibility would most likely be eliminated since both legs of the balanced signal pair would then presumably be loaded equally.  Although of course the relative quality of the sub's XLR and RCA input circuits, as well as any cable-related differences, are additional variables that enter into the mix.

In any event, enjoy!  Regards,
-- Al  
 
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