Audio Research preamp ratings & sound differences

Yes, whatever you call it, the modern ARC sound I hear is not the traditional tube sound one would hear with older tube gear. Its hard to distinguish from good SS gear. Not overtly "tube" sounding. Just very clean and effective. VAC gear I have heard has also struck me this way. What others? Are there two camps of tube sound really, the more modern/detailed/neutral and the older smoother more rounded one?

how does the LS17SE rate among the older models?

Hi Dvdgreco - are you looking for a linestage -no phono? I can provide an opinion anyway as I have owned ARC products for 25 years.

From ARC in my room SP8, SP10, REF3, SP11MKII

The SP11MKII when run in ARC's HOTROD mode with bypass engaged and direct outputs stood on its own performance wise from the others and has remained with me all this time. Sounds most like a clear window to what's in front and behind it. It disappears providing reliable dependable service.

My particular situation is that it sits right beside my listening chair in a dedicated music room, within my arms reach, so I do not require a remote. The SP11MKII was built in the heyday of vinyl with digital also in full swing as well. This resulted imo in an excellent line and phono stage.

SP11MKII is unique in three ways.

1) The mentioned ARC HOTROD mode.
from manual.
"Bypass Switch - In "Bypass" position, directly connects the Gain (volume) control to the output of either the RIAA compensated phono amplification circuitry or a selected line-level source (such as CD). The Balance and Mode controls, as well as the "Monitor" Switch are removed from the active circuit path when this Switch is in operation. The Bypass switch is provided for use with audiophile-quality program material or whenever maximum fidelity to the input signal is desired."

(note the sp10 has a bypass mode too but it only works only with the phono stage)

2) Variable Gain control separate from volume. To deal with the varied source material recordings - especially digital.

3) On the fly impedance loading for cartridges on the front panel using a special heavy duty multi gang toggle.

Doing some online research ARC appears to have re-introduced on the fly variable loading with the Phono 5. The values changed however as the newer preamps are loaded at higher values. The SP11mkII could go down to 30, 10 and 3 ohms.

A negative is it sounds like shite until warmed up for a few hours. It has been very very easy on tubes. (knock on wood) Mine went down some years ago, a problem with the separate power supply unit. It was taken to a good tech and the power supply was beefed up during the repair.

Cheers

My first AR preamp was the LS3B, a wonderful, pure sounding unit and built like a tank. Next, I bought a used SP14 and found it's sound to be, overall, a little less forward and otherwise very much like the LS3B (I didn't use the phono stage). Ultimately, I kept the LS3B, because I preferred its wider soundstage. I auditioned the SP16, SP17 and an LS25 mkII, all of which sounded incrementally better. I settled on an LS26, which is dimensional and organic, with great micro and macro-dynamics. I'm not sure what David12 meant by ascribing a relatively poor response to the LS26. I have not heard such things and my own experience has been enthusiastically positive.

Jump on ARC NOW!!!!!