Recommended Tube Amp for ML CLS I model


Happy holidays!

I've just acquired a pair of CLS I speakers with recent panel upgrade. I know this speaker is supposed to be tube friendly (higher impedance) and the easiest to drive of the CLS range. I am very familiar with the IIz model, but that has very different characteristics from what I understand.

I'm looking to pair a good tube amp with these speakers, to be driven by a Tact 2.2 Mini digital preamp that will be configured to send lower frequency signal to a REL sub and a time-aligned mid / upper signal to the CLS via a Tube amp. (I used a similar setup with an Accuphase DF-35 Digital dividing network and CLS IIz and REL - the Tact is a cheaper option if you just need to 2-way xover division). The digital discussion can take place in another thread.

For now, I am looking for a good tube amp to drive the CLS I model. Since the digitally split signal will be sans deep bass, low frequency performance is not a high priority. So far, I'm looking at ARC VT130SE and VT150 monos (both nice, but a lot of negative feedback used), Rogue Zeus (triode mode), ARC VT100, ARC VS115, Atma-Sphere OTL (with autoformer?), etc.

Any recommendations from those familiar with the original CLS?

TIA!
fdriver

Showing 3 responses by fdriver

Dover - are you referring to the Original CLS, II, IIa, or IIz? I know the IIa was a bear to drive, due to it's very low impedance. The original CLS actually had a very high impedance above 1000 Hz, I believe. This made it ideal for tube amps. The series II versions definitely favored SS amps.
Sparky,

I have a tonne of experience with the IIz model and was able to make it sing with everything from Gryphon to Innersound to battery-powered Rowlands.

For CLS I, though, it is clear that modestly powered tube amps should be ideal; unlike the II series.

But, yes, I agree that experience is important with any planar speaker.
Appreciate all of the very informative replies. I'll check the db on the ML Club site.

So far, it looks like an A-S MA-1, Rogue Zeus, ARC 130SE or 150 monos would be good candidates for the CLS 1. Others would probably be VTL 450 or Quicksilver's V4.