What are some highish impedance tube amps? Regardless of Class.
What s the best Class A integrated tube amp over 80W
I am using Sound Lab ESL speakers, which have a very high impedance at low frequency (30 ohms). At high frequency, SL speakers have very low impedance (3 ohms). I loved the class A in Pass Labs amp, but it took too long to FULLY warm up in my small room (9x11)-5-6 hours. I have a thread on Agon on this topic, but now I would like some recommendations on the best Class A tube integrated amp with >80W. Usually, integrated are the budget model of the line, but must be GREAT class A tube integrateds. Any recommendations?
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- 45 posts total
@chungjh, ... if that Q is directed to me, the only brand I know about is Atmasphere OTLs. I suggest that you make a call to Sound Labs. They know what electronics are the best fit for their products. Ironically, most dynamic speakers on the market have fluctuating impedance and phase angle curves, ... but are voiced to be driven by SS amps having near zero output impedances. Fortunately, most ARC amps have "low'ish" (but not zero) output impedances and mate, for the most part, pretty well with most speakers that have moderate to high sensitivity levels. The impedance curve of my speakers fluctuates between a low of 4 ohms in the bass region and have an impedance peak in the high-teens/low 20s in the 2200 kHz mid/tweeter cross-over point. Because I use my amp's 4 ohm taps, I calculate (as echoed by John Atkinson in his review of the Ref 150) that the SPL delta between the high and low impedance points of my speaker is roughly between .8 to .9 db. Not too bad for a tube amp. I would call Sound Labs. |
You may want to look at this amp. https://www.bobcarvercorp.com/crimson-raven-features-specs It may just be the one. |
@bifwynne good advice given to op speaker maker will know best what works well with their product(s) they may not have tried every amp out there but they have tried what they have tried and hopefully are willing to share (most are) info on what works synergistically at a minimum they will tell you what attributes of high compatible amps are for their speakers... |
- 45 posts total