Promitheus TVC passive preamp anyone?

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lonewolfny42

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Re: Promitheus TVC passive preamp anyone?
« Reply #1880 on: 21 Jun 2007, 07:51 am »
Rollo/Charles....
Nice to hear your having a good time over there....enjoy !!! :beer:

                              Chris

1000a

Re: Promitheus TVC passive preamp anyone?
« Reply #1881 on: 21 Jun 2007, 08:19 am »
Hey guys,
........................Back to the DAC. We compared the DAC to a Paradisea with the WE 396 NOS tube. Just no contest the Promitheus DAC was far and I mean far ahead of the Paradisea. The Paradisea was bright and hard sounding in comparison. The soild state Promitheus was clearly the better sound. I am taking one home to compare to my Lector. Maybe unfair but I truely believe it will be very close. This is the base model Guys and under $400US are you kidding me. The Statement version will be tubed with "C" cores and a few more features. However priced much higher...............................

talk to you all soon

  rollo

What company and model # D/A chip is Nick using in this DAC?    I thought the prototype on the SS DAC was done quite awhile back, or am I confusing this with the tube DAC?

1 or 2 people here are still waiting delv of their SS DAC, I went w a M24 instead I guess I can resell if I do the comparison thing at a future date.  Can Nick give us a delivery time on the SS DAC? :scratch:

thanks,

1000a

Whitese

Re: Promitheus TVC passive preamp anyone?
« Reply #1882 on: 21 Jun 2007, 09:20 am »
Is there gonna be a Statement Phono pre? :scratch:

tanchiro58

Re: Promitheus TVC passive preamp anyone?
« Reply #1883 on: 21 Jun 2007, 04:53 pm »
Quote
What company and model # D/A chip is Nick using in this DAC?    I thought the prototype on the SS DAC was done quite awhile back, or am I confusing this with the tube DAC?

1000a,

My Promitheus DAC is using 1545A chip but do not know what company is the chip belong to. This is a Solid State DAC (not prototype one).

I believe rollo said the tube DAC will be a Statement tube DAC with double C-cores output transformers. How much? I do not know. But it will take a little while. This part you can PM rollo.

All I know is the SS DAC an excellent SS DAC. So far it has not been fully breaking in yet since the trannies need to have 400 hours break-in time. As I know of my DAC the delivery time was almost 8 weeks or 2 months. But it is worth the waiting time since the DAC had to go through a lot of testing to be built as a "one of a kind" SS DAC which will match any systems.

Tan

Say

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Re: Promitheus TVC passive preamp anyone?
« Reply #1884 on: 21 Jun 2007, 07:19 pm »
Hey guys,

                   Well I landed safely and all is well. The food is awesome. I have yet to eat the same cuisine twice. the people are warm and very friendly. Nicholas and his family are treating me like a King. If you like Seafood this place is heaven.
The Tiger Beer is wonderfull. OK so you want to know about the " C " core TVC. Well I'm sorry to say that it is just FREAKEN AMAZING. I could not imagine that we could achieve a better sound. Just more of everything. The double "C" core weighs 12 pounds each and is dubbed " Big Momma".
                   We listened to the prototype version ...



Good to see that you are enjoying yourself and appreciate Nic's hospitality. Hope you guys have alot of fun eating, testing equipment, eating some more, testing again, listening, and so on!

I don't know what the C core can add to an already awesome tvc. Maybe its one of those things where you have to hear it to believe it. I already am getting all kinds of detail and bass coming out of my system. The components up and down stream make a big difference too.

Can't wait to hear more.

1000a

Re: Promitheus TVC passive preamp anyone?
« Reply #1885 on: 21 Jun 2007, 11:30 pm »
Hi Nick

What is the warrenty on your gear and how do I get it repaired if it breaks?

Particulary I am the most concerned about the volume controll in the TVCs?

My Alps Blue controll is supposed to be good to 100,000+ turns, what kind of durability can I expect or or hope for with your volume controlls?

If a TVC volume controll breaks can I repair it stateside or do I have to pay to ship it to Malassia?  how long is the warrenty that kinda suff?

thanks, 1000a

 

NewBuyer

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Re: Promitheus TVC passive preamp anyone?
« Reply #1886 on: 21 Jun 2007, 11:38 pm »
I hope Nick can answer more questions in this thread, in the future. :)

It is extremely, and I mean extremely, difficult to get an email response from Nick these days. I hope he is ok, and not too overworked...


1000a

Re: Promitheus TVC passive preamp anyone?
« Reply #1887 on: 21 Jun 2007, 11:53 pm »
 :scratch: OK experts and one's who hold such knowledge, lets see if I understand?

1-an active preamp =  a preamp
(in the old school way it can produce some big juice)

2- a passive preamp = a linestage
(could be called a buffer/needs to push very little juice cause its mostly used for CD, 2 volts and that is easily pushed up by a passive-linestage type of device)

3- the TVC = a passive preamp that uses a passive volume controll.

4- the passive preamp in my integrated amp = a linestage (or passsive preamp) with a active volume controll an Alps.

is this correct, what gets confusing in audio to me is there are many things that are referred to by at least 2 terms that mean the same thing.


for instance when changing tubes in my integrated amp's, preamp (at which time I thought was a traditional preamp) I got confused when the people helping me referred to input tubes and driver tubes, I started calling the input tubes preamp tubes which was really making them and me confused.

Had I realised this was a passive device (essentially when compared to a old school traditional preamp) I might have not started using the term preamp tube cause there really is no preamp, correct?   It seems the term today in integrateds anyway is just a hold over from the days of tape loop, very low efficancy speakers and on board phono stages?

Gaara

Re: Promitheus TVC passive preamp anyone?
« Reply #1888 on: 22 Jun 2007, 12:02 am »
2.  I was under the impression a linestage was a pre-amp without a phono amp.

3.  a TVC uses transformers for volume control, which is what separates it from other passive pres

I have seen some people complain about the name "passive pre-amp" as generally a pre-amp amplifies the signal and a passive can't.  Some specify them as passive volume controls...but I personally am not that anal.

1000a

Re: Promitheus TVC passive preamp anyone?
« Reply #1889 on: 22 Jun 2007, 12:05 am »
I hope Nick can answer more questions in this thread, in the future. :)

It is extremely, and I mean extremely, difficult to get an email response from Nick these days. I hope he is ok, and not too overworked...

Hi NewBuyer

Yeah I am definitly sure he is just overwhelmed with everything, designing, making, testing, marketing and then the selling its really quite difficult to keep all those plates in the air at one time, and it gets a little scary for most, "do I stay small grow and so - alot of decisions, each affecting the whole of the business long term" in my bussiness my democratic ideas eventually caved under the stress of trying constantly to keep up.  I hope Nick can pull it off.

Have you bought a TVC yet?  I saw you were looking at attentuaters?

Say

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Re: Promitheus TVC passive preamp anyone?
« Reply #1890 on: 22 Jun 2007, 12:06 am »
1000a, you ask some questions that make the hairs on my bald head rise up and take notice. :o

It wasn't too long ago that a preamplifier was a component that would include tape, line level, phono and aux inputs/outputs. Heck wasn't a line in/out before that. Such a component had a selector switch. Balance control. Loudness button (remember those?). Tone controls and so on and so forth.

Nowadays, preamp's for just cd's or sacds (with an extra out/in for aux) are called line level preamps. So far so good. The internal layout and componentry discerns whether it's active or passive. A passive used to have resistor attenuation. Most still do. An active preamp has the transformer receiving ac from the power line. Whether with tubes or transistors, the preamp would provide a large variation of voltage to the amplifier. A passive cannot add more than the voltage received at it's inputs (I may be wrong but there could be passives that do actually boost the signal somehow). Eventually in a nutshell, the key difference between passive and active is mentioned in that last explanation.




NewBuyer

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Re: Promitheus TVC passive preamp anyone?
« Reply #1891 on: 22 Jun 2007, 12:11 am »
I hope Nick can answer more questions in this thread, in the future. :)

It is extremely, and I mean extremely, difficult to get an email response from Nick these days. I hope he is ok, and not too overworked...

Hi NewBuyer

Yeah I am definitly sure he is just overwhelmed with everything... Have you bought a TVC yet?  I saw you were looking at attentuaters?

Hi 1000a, yes I have purchased TVC's as well as other passive controls, and compared all of them so far. Very interesting and fun experience. :)


1000a

Re: Promitheus TVC passive preamp anyone?
« Reply #1892 on: 22 Jun 2007, 12:15 am »
2.  I was under the impression a linestage was a pre-amp without a phono amp.

3.  a TVC uses transformers for volume control, which is what separates it from other passive pres

I have seen some people complain about the name "passive pre-amp" as generally a pre-amp amplifies the signal and a passive can't.  Some specify them as passive volume controls...but I personally am not that anal.

your 2 and 3 make sense to me I understand both as true, thanks I guess whats important is I simply have a better knowledge of the whole picture.

its really the transformer thing thats the hit here and how it works with the volume controll getting better impedance matching, but I did understand there are other passive volume controlls that do not necessarily utilise transformers so the controll it self must be an improvement over the typical Alps and so on.   I am still just learning here, ready to get mine don't think i will wait on the C Core.  I am concerned about longivity and everything in the box seems so delicate.  which is OK and necessary but I do not want to drop big $$ and have to fix it.


New Buyer how does Nicks basic TVC compare to your favorite TVC? but with $$$ spent in mind?

1000a

Re: Promitheus TVC passive preamp anyone?
« Reply #1893 on: 22 Jun 2007, 12:19 am »
1000a, you ask some questions that make the hairs on my bald head rise up and take notice.

its funny I just talked to my amp designer today and it came up cause I'm getting a DAC that has a linestage on board, thinking I might like to use the TVC w it and send it into my amp only.  i call him to ask about making my amp a power amp hense this whole confusing thing 

PromitheusAudio

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Re: Promitheus TVC passive preamp anyone?
« Reply #1894 on: 22 Jun 2007, 12:24 am »
I hope Nick can answer more questions in this thread, in the future. :)

It is extremely, and I mean extremely, difficult to get an email response from Nick these days. I hope he is ok, and not too overworked...



With rollo around this 2 weeks, we spend more time eating and felling sluggish after that

BUt seriously i slep about 2am in the morning and i resume work at 8am in the morning. So there times i do come across as a extremely stone blur person and may miss your mails. Rollo would know, there are times when i just could not remember what we ate or did for the day(no matter how good it was)

PromitheusAudio

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Re: Promitheus TVC passive preamp anyone?
« Reply #1895 on: 22 Jun 2007, 12:28 am »
Hey guys,
........................Back to the DAC. We compared the DAC to a Paradisea with the WE 396 NOS tube. Just no contest the Promitheus DAC was far and I mean far ahead of the Paradisea. The Paradisea was bright and hard sounding in comparison. The soild state Promitheus was clearly the better sound. I am taking one home to compare to my Lector. Maybe unfair but I truely believe it will be very close. This is the base model Guys and under $400US are you kidding me. The Statement version will be tubed with "C" cores and a few more features. However priced much higher...............................

talk to you all soon

  rollo

What company and model # D/A chip is Nick using in this DAC?    I thought the prototype on the SS DAC was done quite awhile back, or am I confusing this with the tube DAC?

1 or 2 people here are still waiting delv of their SS DAC, I went w a M24 instead I guess I can resell if I do the comparison thing at a future date.  Can Nick give us a delivery time on the SS DAC? :scratch:

thanks,

1000a

Now with all the issues solved with the DAC, first run had board problems that bog us down alot. So its pretty much all okay. i would say about 2-3weeks. Every thing is still hand built

1000a

Re: Promitheus TVC passive preamp anyone?
« Reply #1896 on: 22 Jun 2007, 12:30 am »
sorry to double post it but this is important to me?

Hi Nick

What is the warrenty on your gear and how do I get it repaired if it breaks?

Particulary I am the most concerned about the volume controll in the TVCs?

My Alps Blue controll is supposed to be good to 100,000+ turns, what kind of durability can I expect or or hope for with your volume controlls?

If a TVC volume controll breaks can I repair it stateside or do I have to pay to ship it to Malassia?  how long is the warrenty that kinda suff?

thanks, 1000a

 

PromitheusAudio

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    • Promitheusaudio
Re: Promitheus TVC passive preamp anyone?
« Reply #1897 on: 22 Jun 2007, 12:31 am »
Quote
What company and model # D/A chip is Nick using in this DAC?    I thought the prototype on the SS DAC was done quite awhile back, or am I confusing this with the tube DAC?

1000a,

My Promitheus DAC is using 1545A chip but do not know what company is the chip belong to. This is a Solid State DAC (not prototype one).

I believe rollo said the tube DAC will be a Statement tube DAC with double C-cores output transformers. How much? I do not know. But it will take a little while. This part you can PM rollo.

All I know is the SS DAC an excellent SS DAC. So far it has not been fully breaking in yet since the trannies need to have 400 hours break-in time. As I know of my DAC the delivery time was almost 8 weeks or 2 months. But it is worth the waiting time since the DAC had to go through a lot of testing to be built as a "one of a kind" SS DAC which will match any systems.

Tan
Tan
thanks for the nice comments

THe chips are NOS TDA1545A, which was made by Philips and the 5534 NOS made by Philips. This was specially selected for sound sygnery. However finding the 5534 by Philips was slightly difficult as it a NOS chip, chips by SE and Texas instrument was sold by the truck load. They however did not sound as good as the Philips.

PromitheusAudio

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Re: Promitheus TVC passive preamp anyone?
« Reply #1898 on: 22 Jun 2007, 12:34 am »
sorry to double post it but this is important to me?

Hi Nick

What is the warrenty on your gear and how do I get it repaired if it breaks?

Particulary I am the most concerned about the volume controll in the TVCs?

My Alps Blue controll is supposed to be good to 100,000+ turns, what kind of durability can I expect or or hope for with your volume controlls?

If a TVC volume controll breaks can I repair it stateside or do I have to pay to ship it to Malassia?  how long is the warrenty that kinda suff?

thanks, 1000a

 
The TVC breaks, it can be repair state side. You just pay shipping to a US address only. Its 1 year.
you can't kill a TVC unless a lightning strikes or you intentional connect 120 Volts to the RCA sockets
The tvc that was "supposely" broken at another mechanical failure not cost normally. The word to use here is you have to try to break this switches
« Last Edit: 22 Jun 2007, 01:36 am by PromitheusAudio »

NewBuyer

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Re: Promitheus TVC passive preamp anyone?
« Reply #1899 on: 22 Jun 2007, 04:14 am »
The TVC breaks, it can be repair state side. You just pay shipping to a US address only...

What please is the US address? Can it be made available here? I have never yet seen the address listed anywhere... :?:

P.S. Glad you are Ok