Sonic Frontiers Line 3 pcX upgrade

Have had PCX SE+ upgrades done on Phono 1; Line 3 and Power 3's - in each case the improvement is noticeable and brings the units up to world class standards without changing the sonic house sound character of dynamic, lean accuracy, transparency and control. For me, the SF sound is a trade off between a somewhat cool and extended sonic realism versus tubey bloom, harmonics & warmth. I could be ultra critical and say SF gear to some would lack a degree of timbre compared to the ARC house sound - but you can't have everything.

I had the volume OP amp upgrade done at the same time as the SE+, so I can't define that particular improvement, but I have the feeling my ARC REF3 would be even better if they used the same quality OP amps in their processor.

The SE+ upgrades seem to remove that last bit of a veil in the standard units. I also retubed using Chris's recommendations and as much as I tried never found any improvement with NOS tubes.

One benefit of the SF gear is it is dead quiet - equal to SS gear in my home. No hums, buzz, tube rush at all - and I have ribbon speakers that can hiss like hell. The Line 3 SE+ competes with my ARC REF 3 - the REF 3 has more soundstage depth and width, extended top, but less control. The Line 3 has more focus, better placement of instruments, increased bottom end definition, pin point staging and linear top end. The Power 3's have better base balance than my previous Bryston 7b SST's which had more punch but were uni -dimensional. I have never heard any tube equipment with same grip as SF gear on the low end.

PCX are great to work with, fast turnaround and the equipment has been 100% reliable. Bottom line - major improvement with the SE+ upgrades and well worth the money, high value IMHO.

Hi 833dave and Radicalseve,

Thanks for the comment. Compared to the other preamp (Herron) that I have, I feel the one thing that I want to improve on the Line 3 is the top end “air” that surround each instrument. The Herron just seems to have a little bit more separation among the instruments. I wonder if the SE+ upgrade improves on this area?

Radicalsteve, what tubes are you using in the Line 3? I have the same finding as you regarding NOS tubes. I have tried using a pair of NOS tubes (Telefunken CCA, Amperex orange globe 3708 etc.) in the most critical gain stage, and while the they sound cleaner (which I like), they also sound leaner from mid bass down (which I don’t like) than the stock Sovtek. I am kind of surprise at that, and I think I will try out some EH6922 next.

Thanks again

I retubed with Reflektor 6H23P-EB - very low noise. I agree that a a pair of some nice Bugle Boys or Siemens in the critical position will give that "air" and timbre but at the expense of noise as well as rythym & control which manifests itself as a loss of instrument placement - can't win!!

I had Chris perform the upgrade on a Line 3 a couple of years ago. I have been very happy with no problems. I would do it again.

I will be hand delivered my line 3 to pcX tomorrow to proceed for the upgrade. However, I spoke to Chris Johnson and he said that to me the components that they use are even than the original upgrade kit. I will post the upgrade components matrix later so that you can evaluate it yourself. So far, I think the upgrade is worth the price..