NAD EVH 5150 III 50 watt

[Dave Simpson]

I tried a few different pre-amp tubes to tame the gain on the red channel but didn't like the effect it had on the feel of the amp. Put a Tung Sol in V1 and liked what it did to the blue channel. Tried a Tung Sol in V2 and V3 but thought the stock tubes sounded better.

I heard these amps came stock with JJ tubes but mine are completely blank, have no idea what brand they are.

 

[hammered]

I tried a few different pre-amp tubes to tame the gain on the red channel but didn't like the effect it had on the feel of the amp. Put a Tung Sol in V1 and liked what it did to the blue channel. Tried a Tung Sol in V2 and V3 but thought the stock tubes sounded better.

I heard these amps came stock with JJ tubes but mine are completely blank, have no idea what brand they are.

They are unbranded JJs and I found after swapping all kinds of preamp tubes like Rubys,Tungs Sols RFTs ect.. It really wasn`t a huge difference from the stock JJs

 

[Speeddemon]

I tried a few different pre-amp tubes to tame the gain on the red channel but didn't like the effect it had on the feel of the amp. Put a Tung Sol in V1 and liked what it did to the blue channel. Tried a Tung Sol in V2 and V3 but thought the stock tubes sounded better.

I heard these amps came stock with JJ tubes but mine are completely blank, have no idea what brand they are.

Try two 5751's in V3 and V4 to tame the red channel, while retaining the original feel.
I also put a NOS RFT in V1 to thicken it up a tad.