Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Which are the current Singlepower models?
New Posts  All Forums:Forum Nav:

Which are the current Singlepower models? - Page 8

post #106 of 167
There will also be an all tube power supply (tube rectification,tube regulation and tube voltage adjustment) for the SDS-XLR.I'm having this built at the moment.
post #107 of 167
Thread Starter 
I have added some needed further explaination of the SE feature of the MPX3 SLAM SE. I also moved it "up" to reflect it's higher degree of complexity and price to the Supras. The SDS's are now called only SDS.
post #108 of 167
Quote:
Originally Posted by Glod View Post
I have added some needed further explaination of the SE feature of the MPX3 SLAM SE. I also moved it "up" to reflect it's higher degree of complexity and price to the Supras. The SDS's are now called only SDS.
Keep up the good work! You may have a couple more to add to your list soon.
post #109 of 167
Quote:
Originally Posted by sacd lover View Post
You may have a couple more to add to your list soon.
post #110 of 167
Thread Starter 
Quote:
Originally Posted by sacd lover View Post
Keep up the good work! You may have a couple more to add to your list soon.
Thanks.

Let them come - let them come...
post #111 of 167
Thread Starter 
Quote:
Originally Posted by markmaxx View Post
My MPX3 has the supra transformer and 400V out put for the 6BL7GTs I am not sure whats inside? Is it a SE? I belive it was the first MPX3 with 400V. out put stage.
There are a couple of other SP amps with raised operating plate voltages (Va), like yours, but they never got a name. The Supra 398, however, did, which too was build with the 6BX7GT and 6BL7GT in mind.

Interestingly, Supras, at least in the beginning, actually had a lower Va than the MPX3 with the aim to extract more detail and definition from 6SN7 tubes; the early 6SN7GT's in particular (note not the 6SN7GTA or GTB). That was the main idea behind the Supra model. An even larger power-supply than the MPX3, with finer capacitors, sought to compensate for any possible loss in dynamics. Correct me if I am wrong there. The plate effect, i.e. dissipation, was, however, unchanged between the MPX3 and Supra because of a raised plate current. For the record, it would be very interesting to know what operating points the first SDS' had, considering the size of the power capacitor silos. Stand up, the usual suspects.

To the point. Is your 400 Va MPX3 a "SE"? Probably it has to be concluded - no. It does aim to accomodate the 6B(X,L)GT tubes, just like the Supra 392, but it does not have a switchable Va. Yours seems to be a model in the pioneer era towards non-6SN7 tube sets in SP amps.

So - pls tell us, what does it sound like? "OK"?
post #112 of 167
SS-1.
post #113 of 167
Thread Starter 
Quote:
Originally Posted by Sleestack View Post
SS-1.
What is it?
post #114 of 167
Quote:
Originally Posted by Glod View Post
What is it?
I believe it's Sleestack's custom balanced solid state amp.
post #115 of 167
Quote:
Originally Posted by Glod View Post
What is it?
Solid State #1.

It is actually 2 separate solid state amps (and separate power supplies) in one chassis that is between the size of the Maestro and SDS chassis and of the same design. It is polished anodized black.

One amp section is the reference section and will be minimalist with nothing more than a mechanical stepped attenuator and XLR/single ended inputs and outputs.

The other section will be the "fun" section and will include a digital stepped attenuator, vriable/defeatable crossfeed, tone control, XLR/single ended inputs and outputs and a few other controls.
post #116 of 167
Quote:
Originally Posted by sacd lover View Post
The SE is not just rebiased for the 6bl7gt type tubes. The amp is run at a higher voltage, typically 375 volts, for the 6bl7gta/6bx7gt output tubes. ... There is a high/low voltage switch on the SE to switch between the standard 300 volts and the higher voltage. ... a seperate high voltage pathway with a high/low voltage switch for the output tubes .... high for the 6bl7gt type tubes .... low for the 6sn7gt/5687 output tubes...
My MPX3 SLAM SE has no high/low voltage switch... Mikhail said it was unnecessary now. I just change from 6SN7 to 6BL7 and back, and I guess the amp adjusts itself automatically.

Patrick
post #117 of 167
Quote:
Originally Posted by Glod View Post
There are a couple of other SP amps with raised operating plate voltages (Va), like yours, but they never got a name. The Supra 398, however, did, which too was build with the 6BX7GT and 6BL7GT in mind.



Quote:
Originally Posted by Glod View Post
To the point. Is your 400 Va MPX3 a "SE"? Probably it has to be concluded - no.
It does aim to accomodate the 6B(X,L)GT tubes, just like the Supra 392, but it does not have a switchable Va. Yours seems to be a model in the pioneer era towards non-6SN7 tube sets in SP amps.
[IMG][/IMG] As you can see by my expression I am shocked (Joking of course)

I can still use 6SN7 tubes in the out puts and they dont suffer any ill effects

Quote:
Originally Posted by Glod View Post
So - pls tell us, what does it sound like? "OK"?
I think with my new source GO8 the new gain tubes favorite right now RCA,12AV7 and my new to me K340s it is the best sounding amp/rig I have ever listened too! The dynamic, micro detail, the air and soundstage are great. I think if my new amp is much better than my MPX3 I will be surprised

The new gain tube 12AV7 just finishes everything so well it's what I wanted in a headphone amp all along powerfull, with a full open soundstage at a moderate listening level.

I may have not ordered a Supra if I had this tube first! It is that good! The Bastard MPX3 with no name.
post #118 of 167
Thread Starter 
Quote:
Originally Posted by J Harris View Post
My MPX3 SLAM SE has no high/low voltage switch... Mikhail said it was unnecessary now. I just change from 6SN7 to 6BL7 and back, and I guess the amp adjusts itself automatically.

Patrick
Perhaps Mikhail tuned a plate voltage (Va) suitable for both? I assume you are talking about the two output tubes.

Well - there went my hypothesis that the SE feature really was about adjustable plate voltage and sometimes also plate current Does it have the other features in a standard MPX3 SLAM Se package, like the Supra transformer and filtration, Black Gates cathode caps, stepped attenuator and Solen 1 power capacitor? Does it also say SE on the front? I don't know if any MPX3 SLAM do.
post #119 of 167
Thread Starter 
Quote:
Originally Posted by markmaxx View Post



[IMG][/IMG] As you can see by my expression I am shocked (Joking of course)

I can still use 6SN7 tubes in the out puts and they dont suffer any ill effects

I think with my new source GO8 the new gain tubes favorite right now RCA,12AV7 and my new to me K340s it is the best sounding amp/rig I have ever listened too! The dynamic, micro detail, the air and soundstage are great. I think if my new amp is much better than my MPX3 I will be surprised

The new gain tube 12AV7 just finishes everything so well it's what I wanted in a headphone amp all along powerfull, with a full open soundstage at a moderate listening level.

I may have not ordered a Supra if I had this tube first! It is that good! The Bastard MPX3 with no name.
Good to hear!

Don't believe everything people are telling you, especially not me (see my sig.) Everything is in a different light now that J Harris' SE does not have an adjustable plate voltage. Maybe yours could be called a SE as well, with that Supra transformer, especially if the other SE features also have been installed?
post #120 of 167
Thread Starter 
Quote:
Originally Posted by Sleestack View Post
Solid State #1.

It is actually 2 separate solid state amps (and separate power supplies) in one chassis that is between the size of the Maestro and SDS chassis and of the same design. It is polished anodized black.

One amp section is the reference section and will be minimalist with nothing more than a mechanical stepped attenuator and XLR/single ended inputs and outputs.

The other section will be the "fun" section and will include a digital stepped attenuator, vriable/defeatable crossfeed, tone control, XLR/single ended inputs and outputs and a few other controls.
Oh my...

Very, very interesting to say the least. The forum demands a full report as soon as you have got it!
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) › Which are the current Singlepower models?