mid forward sound

single stage or two stage 6SN7 tube  sounding very mid forward
compared to 12ax7 or 5751 etc...
ie: NYD's  6SN7 mic_pre

not that i am complaining about it, just wondered what is the reason behind it...

Try measuring the frequency response to see if there are any differences.

Cheers

Ian

ruffrecords said:

Try measuring the frequency response to see if there are any differences.

Cheers

Ian

Click to expand...

unfortunately i dont see any difference!

kambo said:

unfortunately i dont see any difference!

Click to expand...

what are you listening through?

Cheers

Ian

ruffrecords said:

what are you listening through?

Cheers

Ian

Click to expand...

same set of active speakers, same AD/DA, same DAW , same source material...

also similar comment by rafafredd:
https://groupdiy.com/index.php?topic=12637.msg297988#msg297988

i am using jensen 10k:600

hi kambo!

im building a nyd eq with daves pushpull 6sn7 tube amp design. and im having some harsh/fatigueing sound from it, even if i treat ringings and overshooting. im gonna try get a pair of vintage 6sn7´s and see if i get a more relaxed sound.

what tubes do you use?

Perhaps the same reasons I usually find 12AX7's spitty, grainy and with glare and treble sheen?  Possibly your first listen to an octal small signal tube? 

You comment also reminds me of my first experience with a Neve full of 33114's and 33115's after using Mackie's.  Exactly the same experience. 

5v333 said:

what tubes do you use?

Click to expand...

i have bunch of different tubes, expensive vintage to cheap ones...
i work with cheap ones, once the circuit working properly, i switch to vintage ones...
1950 Sylvania's sounds really creamy and  smooth...
but if ur circuit sounding harsh, 1950 Sylvania it aint gonna cure it!

emrr said:

Perhaps the same reasons I usually find 12AX7's spitty, grainy and with glare and treble sheen?  Possibly your first listen to an octal small signal tube? 

Click to expand...

i have one set of matched pair mic. i record two channel with it, with two different mic_pres...
didnt pay attention to which order i listen....
on DAW i press play and solo a channel at a time while listening...

emrr said:

You comment also reminds me of my first experience with a Neve full of 33114's and 33115's after using Mackie's.  Exactly the same experience.

Click to expand...

that exactly it
but i thought they both have flat response tho ! ?

They do all have flat response.  It's about the harmonic spread. 

emrr said:

They do all have flat response.  It's about the harmonic spread.

Click to expand...

that was my guess too, now its confirmed! thank you 

can we say harmonic spread is equal to even and odd harmonic distortion spread?
even the THD is very low