Which preamps use 6922/6DJ8 tubes?

That is, two pair of outputs on both XLR's (balanced via Tim's famous output transformers) and RCA's (single ended), for a total of four pair of output jacks. The best output provisions of any pre-amp with which I am familiar.

One benefit that came out of the CD was the elimination of the need for enough gain to boost the phono input to the level required by the input sensitivity of many power amps. With separate phono and line stages each can be optimized for their function.

In the 50’s and 60’s some hard core audiophiles would take the tape out signal from their pre-amp and send it directly to their power amp (or insert an attenuator in line between the two), by-passing the line stage altogether.

When doing live music recording on my Revox A77 in the 1970’s, I hooked up it’s output directly to my Dynaco Stereo 70. The A77 has an output level control, and plenty enough gain for the ST70. Most power amps need only 2 volts to reach full output, which the Revox produced. Of course your source must also have an output impedance low enough to not cause frequency response problems. The rule of thumb is the source output impedance must be no more than 1/10 the value of the power amp’s input impedance.

The EAR-Yoshino 868 can drive a 600 ohm load! Tim de Paravicini of course did a lot of work in recording studios (including Pink Floyd’s), where 600 ohms is the standard. It’s gain is 14dB, s/n ratio 90dB, it’s weight 22 lbs. and it’s output 5 volts into 600 ohms, both balanced and single ended, two pair of outputs on XLR and RCA jacks.

Exactly @mulveling, excessive gain is to be avoided. Does Art Ferris still make his Audible Illusions Modulus pre-amp (which uses the 6DJ8 tube) with 30dB of gain (!) in the line stage?

Roger Modjeski of Music Reference liked the 6DJ8/6922 very much, as did EAR-Yoshino's Tim de Paravicini, who uses the 7DJ8 (a higher voltage variant of the 6DJ8) in his pre-amps. I hear no evidence of microphony in my EAR 868 (isolated by Townshend Audio Seismic Pods).

@honeyooi: Ah, another audiophile hip to EAR and the 868, one of hi-fi's best kept secrets! It's designer Tim de Paravicini uses the 7DJ8 in the 868, a slightly higher voltage variant of the 6DJ8. 

Audible Illusions Modulus 3, lots of ARC’s including the LS-1 (still have one) and LS-2 (useta have one). The EAR-Yoshino 868 uses the 7DJ8, a slightly-higher voltage version.