TSE input

[jrobson]

Hi

I'm looking into building a proper DAC, just curious since the option is available, if there is any reason to use 4vrms out or stick to standard 2vrms? Would TSE clip with 4vrms input?

I don't mind turning the knob all the way up though, just curious if any more output will be seen with some gain on the input without clipping.

[Evenharmonics]

Depends on your speakers. If they are >90db efficient (recommended for SET amp like Tubelab SE), 2V should be fine.

[jrobson]

Surely the speaker efficiency won't affect amp clipping?

[boywonder]

I happen to have both of my tubelab SE's on the bench right now; a 45 version and a 300B version.

The 45 version clips at approx 1V RMS input and the 300B clips at roughly 1.5V RMS input.

I'm just eyeballing the sine wave for distortion/asymmetry on the scope at 60 hz and 10Khz.

[jrobson]

Perfect thanks!

[cotdt]

Originally Posted by boywonder

I happen to have both of my tubelab SE's on the bench right now; a 45 version and a 300B version.

The 45 version clips at approx 1V RMS input and the 300B clips at roughly 1.5V RMS input.

I'm just eyeballing the sine wave for distortion/asymmetry on the scope at 60 hz and 10Khz.

You need to run your 300Bs harder! Higher voltage!

[boywonder]

Originally Posted by cotdt

You need to run your 300Bs harder! Higher voltage!

How do know what voltage I'm running the 300B's at?

[cotdt]

Originally Posted by boywonder

How do know what voltage I'm running the 300B's at?

I don't know, but with my 2V source I simply could not get the 300B to go into clipping. I just assume that maybe your voltages are not high enough.