No More upgrades to ARC LS25 Mk.1?

I don't know. I'd recommend that you call ARC at 763-577-9700 and ask Leonard. Might as well get it straight from the horses mouth. Leonard is a wealth of ARC knowledge.

If in fact this is true (or even if it isn't true), I would highly recommend contacting Steve Huntley at Great Northern Sound Company as he is famous for his work with Audio Research gear.

Cheers,
John

Doesn't surprise me. Many manufacturers will upgrade to the current model, however, most will not upgrade an older model to an already discontinued model. They tend to leave that type of work to the modifiers like GNSC.

John

Well if it's new front and rear panels you're after, I agree with Cytocycle.
I was simply under the impression you were looking to improve the performance of your LS25 Mk I, I guess I was mistaken.

Cheers,
John

Well spoken Cytocycle. Many threads here and at AA discussing the differences between 6922 tube vs. 6H30 tube. From what I've read, there is no clear cut winner, only a myriad of opinions.

Cheers,
John

I would keep the Mk I and have some fun tube rolling as Mykesinger suggest, maybe even send it to Steve. If you must have the 6H30 tube, I'd skip the Mk II and go straight for the LS 26. However, remember, you can't tube roll with the 6H30.

If it were me, I'd talk to Steve Huntley and see what he recommends. I'd either upgrade the Mk I through GNSC, or get a LS 26. The LS 25 Mk II would not even be a consideration for me.

Cheers,
John