I have not tryed the EI's but have listened to the Tung-Sol and the Electro-Harmonix 12AX7s in the Jolida JD 1501RC. The Tung-Sol 12AX7 seemed a bit too lush and romantic for my tastes. I personally liked the Electro-Harmonix and found them to be more neutral and detailed. It's really interesting how the type of 12AX7 tube that is chosen to be used in the JD 1501RC can radically alter the sound of this excellent integrated amplifier. I also have the Jolida JD-9 phono preamp and have had the same results changing the two 12AX7s in this unit.
