Amplifier considerations, PrmaLuna EVO 400 versus ARC Reference 160 S. Is ARC worth it?


Greetings all. I own a pair of PrimaLuna EVO 400’s paired with an a first generation ARC Ref 6 and Ref 3 Phono. This was done because I could not afford a pair of 160 M’s and wanted something to tie me over until I could afford them or another option came along. I have been taking a hard look at the Reference 160 S, However, the performance of the EVO 400 is so damn good. I am not sure I would gain anything. In fact, I would lose a lot of customizability and am not a fan of how the ARC amps are built with mounting the sockets for those big ass kT-150 onto the circuit board.

Here is an overview of how I set up the EVO 400’s. They are set up as Mono-bocks. and retubed with KT-150s. The preamp section are retubed with BLACK SABLE JJ ECC82 / 12AU7. A less colored and cleaner sounding tube over the stock Chinese made one. With this configuration I get a sonic signature that has a bit of bite on the top and tight controlled bass that is snappy and authoritative. Specifications change from 140 watts to 192 watts. The music I listen to is a lot of Classical, Gothic Metal, Rock, Jazz, Blues, Pop, and EDM. A lot of my favorite recording are bass heavy with heavy dynamics. Speaker used are 4 Ohm - 95 db efficient - with a frequency response of 18HZ-30KHZ.

The 160s I am considering is $24K has power rating of 140 watts. It is a cleaner sounding amp that does not have much voicing. Offering a more accurate presentation, with more inner detail. That may prove to have better sysnergy with the ARC gear I already own. Also, the case work and overall appearance of the product is top notch. Hence the interest in it.,

Contrasted to PL what I lose is... some musicality, the EVO 400 has more richness in the mids and vocals are more pronounced and have a greater sense of presence within the listening room. Again, the tube sockets are bolted onto the chassis. They do not use a cooling assist fan. I have the advantage of a Monoblock solution, that is easier to handle weight wise and offers better isolation of the signal between the two channels.

Where the PL Cheaps out, is the finish and the balanced inputs. I am not a fan of the battleship grey paint and hodgepodge just slapped together Chi-Fi look that the components have. Nor do I like the cheap ass balanced connectors they use. There is a big difference in quality between them and the ones on my Ref 6.

Any thoughts or opinions are welcome.

Many thanks for your time and trouble.

walkertm

@ Mazian I own a pair of Legacy Audio Focus SE | Legacy Audio

They are a large tower that need a larger room and careful placement. Although they are easy to drive. Amplification is an equal consideration with them. I found out the hard way. Place these to close to a wall or use an amp that overdrives them and the bass response becomes exceedingly boomy. They like the PL, Zesto, and Anthem tube amps. I p[layed around with. In SS they mated well with Classe products. They did not get on well with the BAT VK-500 or later the VK-255 Monoblock’s I had also did not work well.

Ayon is built night and day better, thick machined aluminum ,not sheet metal 

all far better Gold Copper sockets ,Mundorf capacitors ,

land microprocessor controlled  for each tube ,, the others just average all tubes not accurate at all ,when you gets bad tube a led goes on ,you just replace that 1 tube hit a button and recalibrated the amp. And made in Europe not China 

like prima luna , and AR went bankrupt , when will they be back up and running ?

Audio Research 160S. Own it. Love it. Researched and demoed approximately 10 different manufacturer's and went with 160S and REF 6SE pre amp.

Good Luck and let us know how you make out.

Two things:

"not a fan of how the ARC amps are built with mounting the sockets for those big ass kT-150 onto the circuit board."   

This depends on the board's construction. The ARC board is thick and ridged. It feels industrial. ARC's weak link has never been their tube sockets. I've never owned a PL so I don't have personal experience with their boards but I'm told they are thinner than the ARC's boards. 

and;

"The 160s I am considering is $24K has power rating of 140 watts. It is a cleaner sounding amp that does not have much voicing. Offering a more accurate presentation, with more inner detail. That may prove to have better synergy with the ARC gear I already own. Also, the case work and overall appearance of the product is top notch"

I think you've answered your own question :)

If customizing the PL is fun for you by all means tinker away- I find great satisfaction tinkering at my bench- but my ARC gear is my anchor. 

Have you considered waiting for the 320M?  That may be your all-in-all. (If you have a fat wallet)

ARC (for all it's foibles since WZ died) has IMO always been designed to work best with it's own components. ARC is a neutral palate. Many don't like that- they shop for voicing. So:

Listen in your own room and choose based on that. In the end how it sounds is priority #1. 

The question is not which amp will work best in your system, you already know the answer to that. The question is whether or not the upgrade will be worth the added expenditure and only you can answer that.