steenoe said:
Not if you look at the Crss value of the Lovoltechs.
Had it been at the IRFP240 level, then i would start thinking about 50-100 LU's per side.
NP posted about his idea of an output stage with a multitude of small devices in parallel, the dimensions of the LU Powerlites would enable a Miniature Monster amp.
Ooh well, i still have to stumble on a single Japanese retro power FET before i can start on an anabolic version of THIS , reason i asked you about the GRs in our mano-a-vacuum-drag talk.
A shame the LU doesn't have a counterpart, powerhandling of the 1014D and the K60 are roughly the same.
steenoe said:
I have been playing around with the limit of how hard you can run them. It's no problem to run them at 16W as long as you make sure the temp is kept down around 40C. So it's the same old mantra.....say after me: BIIIIIG heatsinks 😉
Magura 🙂
Hmmm......
An A-75 followup has been discussed--
what makes an A-75 an A-75 -- is it the dual diff front-end or the push-pull output stage???
the aleph-X followup debate goes on--something along the lines of "what is worthwhile?"--"new and original", or...something tracking the Passlabs flagship.....
and Nelson keeps dropping hints about this circuit and that--I suspect they are hints for the DIY community to see what we come up with, though nothing even approaching a consensus has turned up.....
the UGS threads seem to have generated many really great preamp designs already....
I look at these pages daily, and ask myself the question--"What new project would I really like to see?"--and I don't come up with an exact answer....
In vague terms it would be a powerful amp...with the finesse of a j-fetted Mini Aleph -- but the bottomend of an A-75 -- (but not necessarily with PP output........)
JJ
Just dreeming…
I know that by definition A amps are inefficient, I do use them couse they sound better, nothing new here.
Other “designers” of class AB swear by their babies saying that they can match or even surpass soundwise any class A amp, which I can’t confirm.
What I would like to see is an amp like the A75, Threshold, XA or whatever best overall Nelson design, which would draw half the power at idle or less for that matter without the drawbacks of AB class. Call it breakthrough, not an easy task for the moment but should be a target for the near future.
Been smoking to much lately… Yes, I know
I know that by definition A amps are inefficient, I do use them couse they sound better, nothing new here.
Other “designers” of class AB swear by their babies saying that they can match or even surpass soundwise any class A amp, which I can’t confirm.
What I would like to see is an amp like the A75, Threshold, XA or whatever best overall Nelson design, which would draw half the power at idle or less for that matter without the drawbacks of AB class. Call it breakthrough, not an easy task for the moment but should be a target for the near future.
Been smoking to much lately… Yes, I know
Pass Labs replacement
Hi Everyone,
I'm new on the diyaudio forum.
I'm intending to replace my current Pass Labs XVR1 crossovers with a DEQX 2.6P and my Pass Labs amps (which simply run too hot - even for the London climate!) with amps incorporating the new Hypex UcD700HG modules (when they're available).
Am I making a big mistake?
Although the XVR1 is pretty flexible, there are a couple of reasons why I'd like to change to the 2.6P:
- I can't live with anything other than a first-order crossover with the XVR1; it just sounds the most natural, but limits what I can do
- I'm finding it difficult to correct for a 100Hz dip in my room
My current setup is this:
Laptop running Foobar & ASIO driver
RME Fireface 800 (digital out & wordclock in)
Esoteric D70 (digital in & wordclock out)
Pass Labs XVR1 x 2
Pass Labs x600 x 2 (bass)
Pass Labs Aleph4 x 2 (mid & treble)
Wilson Benesch Chimera speakers
Analysis Plus & Kimber cabling throughout
PS Audio P600
Any advice much appreciated.
Cheers,
Mani.
Hi Everyone,
I'm new on the diyaudio forum.
I'm intending to replace my current Pass Labs XVR1 crossovers with a DEQX 2.6P and my Pass Labs amps (which simply run too hot - even for the London climate!) with amps incorporating the new Hypex UcD700HG modules (when they're available).
Am I making a big mistake?
Although the XVR1 is pretty flexible, there are a couple of reasons why I'd like to change to the 2.6P:
- I can't live with anything other than a first-order crossover with the XVR1; it just sounds the most natural, but limits what I can do
- I'm finding it difficult to correct for a 100Hz dip in my room
My current setup is this:
Laptop running Foobar & ASIO driver
RME Fireface 800 (digital out & wordclock in)
Esoteric D70 (digital in & wordclock out)
Pass Labs XVR1 x 2
Pass Labs x600 x 2 (bass)
Pass Labs Aleph4 x 2 (mid & treble)
Wilson Benesch Chimera speakers
Analysis Plus & Kimber cabling throughout
PS Audio P600
Any advice much appreciated.
Cheers,
Mani.
I NEED that buffered splitter- I use a Y cable now 🙂
Active Crossover/equalizer: Later I want to try this.
Nelson has a lot of data about full range drivers and a lot of experience with crossovers. I think that his special experience will give us a very useful solution to a problem a lot of us here have: We love those wide range drivers, but need to hook them to monster woofers if we don't use horns. We now have a bunch of really nice amps available- this would be something different..
Re: Pass Labs replacement
I would look at room treatment/ speaker placement first before considering any type of active room correction.
If you then need then to do some equalisation look at a professional parametric EQ..there are pure class A ones available.
Frankly all the long term user reports of the DEQX in hi end systems are of disappointments....loss of micro dynamics and that it is not a once box panacea.
Macka
manisandher said:
I would look at room treatment/ speaker placement first before considering any type of active room correction.
If you then need then to do some equalisation look at a professional parametric EQ..there are pure class A ones available.
Frankly all the long term user reports of the DEQX in hi end systems are of disappointments....loss of micro dynamics and that it is not a once box panacea.
Macka
Mani,
I think you'd be making a mistake. The reason that first order crossovers (6 dB/oct) sound best is because...well...they're the best. Changing equipment will not alter that one simple fact.
To the extent that you have a 100Hz dip, I'd start by changing the placement of your speakers. Try placing them approximately a third of the way down the room. No, this isn't necessarily a perfect solution, but you might be amazed at how many room-related problems can be cured by spending an afternoon moving the speakers around.
The heat? That's just one of the unalterable laws of the universe. The hotter an amp runs (in the sense of being closer to class A) the better it will sound. All the marketing and double talk in the world can't change that. I live in South Carolina, which I will wager is a great deal warmer on average than London, and I cannot tolerate the sound of solid stage running less than class A, at least in the midrange and high end. Low bass is acceptable in class AB. If I can't have class A solid state, I demand tubes, and that runs at least as hot, overall.
It would be a sad thing to sell off the equipment you have...only to have to buy it back because you've discovered that you took the wrong fork in the road.
Grey
I think you'd be making a mistake. The reason that first order crossovers (6 dB/oct) sound best is because...well...they're the best. Changing equipment will not alter that one simple fact.
To the extent that you have a 100Hz dip, I'd start by changing the placement of your speakers. Try placing them approximately a third of the way down the room. No, this isn't necessarily a perfect solution, but you might be amazed at how many room-related problems can be cured by spending an afternoon moving the speakers around.
The heat? That's just one of the unalterable laws of the universe. The hotter an amp runs (in the sense of being closer to class A) the better it will sound. All the marketing and double talk in the world can't change that. I live in South Carolina, which I will wager is a great deal warmer on average than London, and I cannot tolerate the sound of solid stage running less than class A, at least in the midrange and high end. Low bass is acceptable in class AB. If I can't have class A solid state, I demand tubes, and that runs at least as hot, overall.
It would be a sad thing to sell off the equipment you have...only to have to buy it back because you've discovered that you took the wrong fork in the road.
Grey
Nelson Pass said:
Well, all I can comment on here is my own interests... I have a high voltage balanced pre type of circuit and it does pretty good at high output levels (Thanks). I do need a high voltage S.E. Pre circuit, capable of driving the F4 type of stuff, and my inductor loaded follower too 😀
Please,
Thanks,
World Peace should come before me though 😀
Yes, world peace is a good idea, but I still want an electronic x-over design by the master. 🙂
I know, I know... someone else has already done this, but it would be a lot of fun to have the tutorial from you, Nelson!
I know, I know... someone else has already done this, but it would be a lot of fun to have the tutorial from you, Nelson!
carpenter said:
Variac said:Carpy And I tend to think alike..
Whirled peas?
greedy lazy boyz................
bothering Papa for that - he gives you schmtc ,along with filter tables not so long ago.......... but.......seems that wasn't spotted
hinthint
cottage jpg files , published temporary with other bunch of Treshold related pics
bad boyz
two days only
http://choky.on.neobee.net/cottage.rar
only to please Variac to not expel me from this dreky place
http://choky.on.neobee.net/cottage.rar
only to please Variac to not expel me from this dreky place
quote:
Originally posted by Nelson Pass
OK, but we're not answering the fundamental question. What
project is best at this time? I can't release them all at once.
There are may be only two categories of wishes.
1. The wishes of the dummies (I belong to this categories). Dummies are good people experts in art of reception, and reception could be, on the other hand, very inspiring for the creator; but the dummies cannot anticipate.
As an example I could say , I am interested in
A pre (like BOJZ but different)
A (simple but extraordinary sounding) DAC
A Power amp addressing 4 ohms speakers (100-200 W) may be like A75 but different
A parametric equalizer
2. The second category include the people involved enough in the Arcanas of Electronics so that they are able of some creativity. They have some interesting topology in mind they would like to “discuss” with Nelson in a practical matter.
But at the end it will turn to be pre, an amp, etc… something that the dummies are able to deal with. Hehe.
😎
––––––
Mr. Pass.
In order to try either F1 or F2, I think about a small Back loaded horn project with Fostex FE126E (with bass Hybrid Enclosure). Would you say : go for it?
Originally posted by Nelson Pass
OK, but we're not answering the fundamental question. What
project is best at this time? I can't release them all at once.
There are may be only two categories of wishes.
1. The wishes of the dummies (I belong to this categories). Dummies are good people experts in art of reception, and reception could be, on the other hand, very inspiring for the creator; but the dummies cannot anticipate.
As an example I could say , I am interested in
A pre (like BOJZ but different)
A (simple but extraordinary sounding) DAC
A Power amp addressing 4 ohms speakers (100-200 W) may be like A75 but different
A parametric equalizer
2. The second category include the people involved enough in the Arcanas of Electronics so that they are able of some creativity. They have some interesting topology in mind they would like to “discuss” with Nelson in a practical matter.
But at the end it will turn to be pre, an amp, etc… something that the dummies are able to deal with. Hehe.
😎
––––––
Mr. Pass.
In order to try either F1 or F2, I think about a small Back loaded horn project with Fostex FE126E (with bass Hybrid Enclosure). Would you say : go for it?
Manu said:
I'm not Papa , but.........
look at www.sonido.hu
SFR200 (or two smaller)
good for mau12
if you make that,you'll be lucky more than Luke
Zen Mod said:
I'm not Papa , but.........
look at www.sonido.hu
SFR200 (or two smaller)
good for mau12
if you make that,you'll be lucky more than Luke
The FR looks great. (no X-over needed)
But who is mau12?
🙂
Manu said:
google for mauhorn 12 and mauhorn
12 is smallest in footprint,ALL OF THEM cpslck!!! intended for 8"
you can also search around for my posts regarding sfr200
or just shoot me with PM
Thanks.
Beside the fact that the sonido are a very tasty project (I already e-mailed them).
What is wrong with the fostex i mentioned? This bass hybrid enclosure looks interesting, no? With an additional tweeter the FE126E would make good figure.
(But I am prudently asking because I have no experience with neither Fullrange nor Horn)
🙂
Still searching for the translation of "cpslck" in the collins Engl.-French dictionnary😀
Beside the fact that the sonido are a very tasty project (I already e-mailed them).
What is wrong with the fostex i mentioned? This bass hybrid enclosure looks interesting, no? With an additional tweeter the FE126E would make good figure.
(But I am prudently asking because I have no experience with neither Fullrange nor Horn)
🙂
Still searching for the translation of "cpslck" in the collins Engl.-French dictionnary😀