SALE PENDING. I used this little gem between my Eastern Electric DAC and the integrated amp. It provides so much more flexibility in tailoring or changing the sound to your liking. There is a switch that changes the voltages the tube sees. One setting has the sound a little more laid back while the other has a bit more dynamic jump. The gain control allows you to play with both the preamp, or integrated amp gain for yet another variable to adjusting the sonic presentation. I also used it as a preamp while I was trying out different amplifiers.
My use with it was for adjusting the sound of the recording to my liking or just changing the sound of the system whenever I got bored. The stock tube was used but you can roll any number of other tubes for even more variety of changing the sound. I estimate the unit has about 600 hours on it and is in mint condition. Copy and paste the partial address below into you browser address bar. Links are not allowed in the ads.