Who out there knows about Audio Research Pre's???

The LS22 was produced for only a year (1995), and is therefor the least well known of the recent AR linestages. I think this the reason it is such a bargain on the used market. It is, in fact, fully balanced. It can also be used with single ended sources and amps.

Rupe

Do a Mfg. search on AudioGon to get a list of all the models and dates made. Subscribe if you want pricing. It will give you a sense of how their products evolved.

steer clear of the newer ARC LS22, 25, ref1

most bang for buck LS5 MKIII
it is fully balanced inputs but you can get cheater plugs and it sounds just fine

this pre is more musical than the Ref 1
and a lot less costly

the ls5 has a luscious sound, warmth, dynamics, soundstage
really opens the music up, is revealing and is tonally balanced

you can sometimes find them for $2000-$2300

the mk ii is nice also

tom

If you want a phono stage try the SP vintage from ARC. They are all a great value at their used price. I like the SP-8 (800-900.00) better than the SP-6A (700-850.00) both of which I owned. I can't comment on the B-E series of SP-6.

If you can find one, don't hesitate on the SP-10 Mk2 it is a great pre-amp with an excellent phono stage. You'll be lucky to find one cheap but miracles do happen. I have a friend who picked up a mint one for 1.5K, typically 2-2.5K.

I agree with Audiotomb. The best of ARC's linestages I've heard is the LS-5. I have also listened to the LS-15, LS-16 and LS-25 and they are ho-hum compared to the LS-5.

There is an issue with the turn-on on the SP-6A that I have not heard about in a long time. The SP-6B has this fixed. At turn-on there is a DC transient that gets passed through the preamp. If you have a DC coupled amplifier (solid state amp designs), you may (and I have) overextend any woofers to the point of destruction. The SP-6B has a warm-up timer which prevents this.

Sounds trivial, but it is incidious. Long time ago, I was listening to stereo, warming up for run. Went running, did not turn off system. While I was out, there was a short power outage. I came back to blown speakers. Ouch.

Anyway, lots of people still interested in SP-6, so I thought I would tell my story from 24 years ago.

Recently, I have switched to an SP-11 and I like the SP-11 better than the SP-6. But the SP-6 (not as good a soundstage) is a warm, wonderous beautiful sounding preamp. Mine has been modified with Sidereal caps. I was actually surprised at how good it was compared to the SP-11. SP-11 is the winner though, bass much better, soundstage much better.

Another feature on the SP-11 that is nice is that the phono stage is much quiter than the SP-6. This can allow one to use a lower output MC cartridge without a step-up device. SP-6 works fine with normal output levels, but I have tried a .2 microvolt cartridge and it just plain is noisy at the gain required.

My impression is in the world of SP-6, the SP-6B is the unit to have. I have owned my SP-6A since 1979 and it is still apparently worth within $100.00 of what I paid for it.