Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › SDS, Supra, MPX tuberolling, the new global, improved thread
New Posts  All Forums:Forum Nav:

SDS, Supra, MPX tuberolling, the new global, improved thread - Page 32

post #466 of 780
Quote:
Originally Posted by Turnaround View Post
What set of tubes do u guys recommend for my MPX3 SLAM to get a very "tubey" sound -- looking for lush, liquid and euphoric -- and a very solid state sound?

For me, I like having a choice of strong opposites, like having a pair of Grados and a pair of Senns rather than finding something in-between.

TIA
Right now I'm using a two different combos in my prototype SDS:

A Raytheon 5687 driving Sylvania VT-231's is ridiculously tubey and lush. It synergizes wonderfully with my R10's midrange and boosts bass response as well (I have one of the more bass-endowed R10s to start with). Also sounds great with the JVC-DX1000 and L3000; really synergizes with the already lush nature of these headphones. The drawback is that the bass can distort somewhat at high volume levels, but for midrange it's incredible. Also doesn't have the slam of other tube combos. Not so good with the Qualia.

A Tung-sol roundplate VT231 or KenRad VT231 driving TungSol D-getter 5687's. This is a much tighter, snappier sound with a bit of a smaller soundstage than the above combo. A bit drier in the midrange. You could say it's a bit more like really good solid state. This works best with the Qualias, also really good with L3000 (this combo's slam with the L3000's killer bass is awesome).

Please note my ideas on synergy - I don't like to counter the strength of one component with the opposite attributes in another component; I like to pick components with similar attributes so that they enhance each other's strengths. In a nutshell I think synergy should focus on enhancing strengths rather than countering weaknesses, hence my tube choices for my various phone above.

I think my friend purk's upgraded SDS uses different types of tubes that combine the best attributes of both tube combos I've listed above, but I haven't spent as much time with that amp as I'd like I'll have to get my SDS upgraded before I can try those tubes. Man, it's so difficult to keep up with the current state-of-the-art tube combos for Singlepower amps, I already feel way behind the times
post #467 of 780

tube sub

does anyone know if a MPX SE can handle the 6BL8 (ECF80), 7643 (E80CF), or
6BM8 (ECL82) tubes?
post #468 of 780
Quote:
I think my friend purk's upgraded SDS uses different types of tubes that combine the best attributes of both tube combos I've listed above, but I haven't spent as much time with that amp as I'd like I'll have to get my SDS upgraded before I can try those tubes. Man, it's so difficult to keep up with the current state-of-the-art tube combos for Singlepower amps, I already feel way behind the times
Mike,
Well...It is time to get your SDS the "EXTREME" upgrade.
post #469 of 780
Quote:
Originally Posted by purk View Post
Mike,
Well...It is time to get your SDS the "EXTREME" upgrade.
...and go without beautiful music for weeks? Never!! Maybe I should buy a Supra Extreme so I can send the SDS in for upgrades without skipping a beat
post #470 of 780
Quote:
...and go without beautiful music for weeks? Never!! Maybe I should buy a Supra Extreme so I can send the SDS in for upgrades without skipping a beat
Mike...that is even a better idea. Get the Supra Extreme so we can hear it next to my upgraded SDS-SE.

Purk
post #471 of 780
Quote:
Originally Posted by luvdunhill View Post
does anyone know if a MPX SE can handle the 6BL8 (ECF80), 7643 (E80CF), or
6BM8 (ECL82) tubes?
No .... those tubes are a high mu Triode/ Pentode combination in a single tube and are consequently nowhere near compatible. The MPX3's are wired to use dual triodes.

http://www.nj7p.org/Tube4.php?tube=6BM8
post #472 of 780
Well, my ECC2 adapter arrived, and I have to say that my first impression is that the 7308 (an upgrade version of the 6DJ8) makes a very refined sound as the driver for 2 TS 5687s. Clean, extended, with timbral depth that the TS 6SN7GT or redbase 5692 do not have - especially clear on female vocals. I expect it only to improve as the tube breaks in.
post #473 of 780

Lush Tube sound

RCA VT-231 grey glass as outputs with Amperex 7062 input.
post #474 of 780
Quote:
Originally Posted by mulveling View Post
...and go without beautiful music for weeks? Never!! Maybe I should buy a Supra Extreme so I can send the SDS in for upgrades without skipping a beat
Purk has the right attitude. Just add the XLR to the end.
post #475 of 780
Quote:
Originally Posted by mulveling View Post
Right now I'm using a two different combos in my prototype SDS:

A Raytheon 5687 driving Sylvania VT-231's is ridiculously tubey and lush. It synergizes wonderfully with my R10's midrange and boosts bass response as well (I have one of the more bass-endowed R10s to start with). Also sounds great with the JVC-DX1000 and L3000; really synergizes with the already lush nature of these headphones. The drawback is that the bass can distort somewhat at high volume levels, but for midrange it's incredible. Also doesn't have the slam of other tube combos. Not so good with the Qualia.

A Tung-sol roundplate VT231 or KenRad VT231 driving TungSol D-getter 5687's. This is a much tighter, snappier sound with a bit of a smaller soundstage than the above combo. A bit drier in the midrange. You could say it's a bit more like really good solid state. This works best with the Qualias, also really good with L3000 (this combo's slam with the L3000's killer bass is awesome).
x2 on these recommendations. I have found the most lively sound I've gotten out of the PPX3 Slam (in my admittedly short experience) is with a Ken Rad Black Glass and Tung Sol d-getter 5687x2. Jumpy, sparkley, and with sufficient separation between sounds. The RCA 5687s are still my favorite for classical and chamber music. Lush, warm, dark, just really lovely. I JUST got in an RCA 6sn7 grey glass today, and am currently using it with my tung sols. Looking forward to pairing it with the RCA 5687s for the ultimate in super warm goodness.
post #476 of 780
I need advice regarding which tubes to use in my fully upgraded Supra SDS. I'm currently operating the amp in the high voltage setting, and using Sylvania 6BL7GT output tubes, and a Tung Sol 5687 tube (with adapter) as the power tube. Using this setup, the performance of my R10 is very substantially inferior to that of my newly refurbished HE90, which is driven by a relatively low cost McAlister amp. The sound of the HE90 is much more detailed, and true-to-life, especially in the reproduction of full classical orchestral music. When playing concertos, the sound of the solo instrument sounds ok on the R10, but the sound of the supportive full orchestra is very poorly resolved. Changing from the HE90 to the R10 is like moving from the front to the rear of a concert hall. It's like the R10's sound contains lots of hall coloration, with consequent reduced resolution of background orchestral instruments.

Here's a little history. When I first got the HE90, about a year ago, I found that my SDS/R10 combo didn't sound nearly as good as the HE90. Mikhail then upgraded the SDS, also adding a high voltage switch, and this resulted a big improvment in sound. In fact, the upgraded SDS/R10 combo sounded as good, or better, than the HE90. It then became apparent (through comparison with another HE90) that my HE90's sound lacked bass, which resulted in my returning it to Sennheiser in Germany, for checkout, and necessary repairs. But now, that it's been overhauled and returned after a six month wait, my HE90/McAlister combo sounds dramatically better than my SDS/R10 combo.

I'm wondering whether there's another tube combo that I can plug into the SDS in order to improve the performance of the R10; i.e., to bring the R10's performance closer to that of the HE90. I have an ECC adapter, and I expect Mikhail to send me some tubes soon. I would really appreciate advice regarding how to improve the R10's performance.
post #477 of 780
mikeg -

While it is perfectly acceptable to use the 5687 tube in the driver position most don't. The 5687 seems to work best as an output tube. So my advice would be to change the input tube to something else. It's somewhat difficult tell you just which tube to change to, as I have a MPX amp and don't own the R10's.

Flying blind, I would suggest changing to a 12au7 tube in the driver position, possibly a Tung Sol, or Mullard. These tube are likely to provide clarity and detail while retaining warmth.

For more full bodied sound a would recommend either the 12az7, or 6414 in the input spot. These tubes retain a lot of detail which is one of the attributes of the "9 pin miniature" tube family, but are richer and more full bodied than the 12au7's. A word of caution with these two however, they both have a higher amplification factor than the 12au7, which may be too much for some SP amps. I run them in mine without problem, but some have complained of additional tube noise with them. If they work for you, you will find them among the most pleasing.

Also worth considering, is the good old stand by 6sn7 and it's equivalents. Here I would recommend trying some of the Sylvania branded tubes. You do not have to buy the obscenely priced ones either to get a nice sound. There are many nice sounding 6sn7's, but you will find them much fuller than their 9 pin equivalents.

With all of these I would continue to use the 6bl7 output tubes that you are currently using.


happy listening!

- augustwest
post #478 of 780
If you have a ECC type 1 coming soon I'd buy some 6829s or some RCA 12av7s.
post #479 of 780
Mikeg,

Quote:
I need advice regarding which tubes to use in my fully upgraded Supra SDS. I'm currently operating the amp in the high voltage setting, and using Sylvania 6BL7GT output tubes, and a Tung Sol 5687 tube (with adapter) as the power tube. Using this setup, the performance of my R10 is very substantially inferior to that of my newly refurbished HE90, which is driven by a relatively low cost McAlister amp. The sound of the HE90 is much more detailed, and true-to-life, especially in the reproduction of full classical orchestral music. When playing concertos, the sound of the solo instrument sounds ok on the R10, but the sound of the supportive full orchestra is very poorly resolved. Changing from the HE90 to the R10 is like moving from the front to the rear of a concert hall. It's like the R10's sound contains lots of hall coloration, with consequent reduced resolution of background orchestral instruments.

Here's a little history. When I first got the HE90, about a year ago, I found that my SDS/R10 combo didn't sound nearly as good as the HE90. Mikhail then upgraded the SDS, also adding a high voltage switch, and this resulted a big improvment in sound. In fact, the upgraded SDS/R10 combo sounded as good, or better, than the HE90. It then became apparent (through comparison with another HE90) that my HE90's sound lacked bass, which resulted in my returning it to Sennheiser in Germany, for checkout, and necessary repairs. But now, that it's been overhauled and returned after a six month wait, my HE90/McAlister combo sounds dramatically better than my SDS/R10 combo.

I'm wondering whether there's another tube combo that I can plug into the SDS in order to improve the performance of the R10; i.e., to bring the R10's performance closer to that of the HE90. I have an ECC adapter, and I expect Mikhail to send me some tubes soon. I would really appreciate advice regarding how to improve the R10's performance.
Just like you, I was having the same problem after landing my R10s in the beginning (they just didn't sound right), so I upgraded my SDS with all blackgates caps, high capacitance output (?), adjustable bias, and high voltage option. After Mikhail retured an amp to me, I couldn't be more happy. Now, I'm using the 6414 as driver position and the two Sylvania 6BL7s on the output position (I used the Tungsol + Slyvania D getter b/f). Both the bias and voltage set to high. IMO, the 6BL7s and 6414 really bring out the best in R10s. I also tried the 5687 as a driver position and didn't really like it. IMO, the 6414 gives much wider soundstage and much more details than the 5687. Mikhail also recommend this tube combination in favor of others. Other improvements of the 6414 over the 5687 include more full bodied (hence much better bass response), better midrange, more airy, and better image and seperation of instuments.
post #480 of 780
Also, the Ken-Rad black glass 12/6SN7 would work really well, I think. Its bass response nicely compensates for the R10, its an old favorite of many as a driver tube, and I believe adhoc thinks it has the best low-level detail of any 6SN7. They're not that expensive compared to other premium 6SN7 (or you can just build a 12SN7 stash ), and IMHO I think they're worth a shot.

I really really enjoy the Raytheon 6414 with my HD650s, but I think the way they emphasize higher frequencies and note edges wouldn't play as well with the R10. Just a guess.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › SDS, Supra, MPX tuberolling, the new global, improved thread