Promitheus TVC passive preamp anyone?

rollo · « **Reply #1980 on:** 17 Jul 2007, 07:41 pm »

Say,
Thanks for the kind words. I was a bit naive I guess. Rules are rules however and cannot fault the moderater. They were doing their job.

rollo

Gpj · « **Reply #1981 on:** 17 Jul 2007, 09:30 pm »

The problem of course being that posts on this type of board are assumed to be impartial and free of bias. This is not so much a board policy but a basic assumption that must be made if the information presented is to be deemed valid. Once someone declares an affiliation with a manufacturer he is presenting his bias up front and forevermore. I will post soon about my very positive experience with Promitheus and the TVC.

JohnR · « **Reply #1982 on:** 18 Jul 2007, 12:26 am »

There is no jury. As already stated, let's move on.

audioferret · « **Reply #1983 on:** 18 Jul 2007, 02:45 am »

What are the dimensions of the preamp? (WxHxD)

I have scoured the website and this thread adn cannot find any mention of it. I need to know if it will fit in/on my cabinet.

F-100 · « **Reply #1984 on:** 18 Jul 2007, 03:33 am »

Quote from: audioferret on 18 Jul 2007, 02:45 am

What are the dimensions of the preamp? (WxHxD)

The dimensions are 12" W x 2.75" H x 8" D without the footers.

Jolojl · « **Reply #1985 on:** 18 Jul 2007, 02:17 pm »

Hi!

Will hopefully get my TVC within a week aa. I'm then going away a week or two on holidays and am planning to leave the TVC breaking-in while I'm away. But I'm wondering about a thing or two (or three) as to how to do it ...

Maybe someone in this thread can help me out?

1) What volume level should I have if I leave the TVC playing while I'm away (full? half? quarter?)?
2) How far does the signal need to go for the TVC to break in, i.e. must I leave the power amp turned on?
3) If I need to keep the power amp running, can I have its volume knob set to 0 (= no sound, for the neighbours ...)

Johan

Say · « **Reply #1986 on:** 18 Jul 2007, 02:50 pm »

Quote from: Jolojl on 18 Jul 2007, 02:17 pm

Hi!

Will hopefully get my TVC within a week aa. I'm then going away a week or two on holidays and am planning to leave the TVC breaking-in while I'm away. But I'm wondering about a thing or two (or three) as to how to do it ... Maybe someone in this thread can help me out?

1) What volume level should I have if I leave the TVC playing while I'm away (full? half? quarter?)?
2) How far does the signal need to go for the TVC to break in, i.e. must I leave the power amp turned on?
3) If I need to keep the power amp running, can I have its volume knob set to 0 (= no sound, for the neighbours ...)

Johan

Hello Jolojl. Once your tvc arrives give it a good workout. Two or three clicks from maximum will do the trick. You won't need an amp. Just press repeat on your cd player. The voltage will do the rest to break in the tvc transformers. It will take alot of time though. We kind of go by the 400 hour rule around here.

Take care.

audio-heaven · « **Reply #1987 on:** 18 Jul 2007, 04:13 pm »

Quote from: Jolojl on 18 Jul 2007, 02:17 pm

Hi!

Will hopefully get my TVC within a week aa. I'm then going away a week or two on holidays and am planning to leave the TVC breaking-in while I'm away. But I'm wondering about a thing or two (or three) as to how to do it ... Maybe someone in this thread can help me out?

1) What volume level should I have if I leave the TVC playing while I'm away (full? half? quarter?)?
2) How far does the signal need to go for the TVC to break in, i.e. must I leave the power amp turned on?
3) If I need to keep the power amp running, can I have its volume knob set to 0 (= no sound, for the neighbours ...)

Johan

Hi, Just wanted to add to the good advice Say gave you, I would keep your TVC connected to your power amp so it sees a resistive load, the amp does not have to be switched on though. I understand the TVC won't run in properly unless it's under load, that is what I have been told anyway

if it doesn't apply then please don't shoot me shoot the guy who told me instead

I hope you enjoy it I've had mine for a few months now and it's fantastic it even gives my DIY Music First TVC a run for it's money for a lot less mula aa

Have a nice vacation

rollo · « **Reply #1988 on:** 18 Jul 2007, 04:40 pm »

Quote from: audio-heaven on 18 Jul 2007, 04:13 pm

Quote from: Jolojl on 18 Jul 2007, 02:17 pm
Hi!

Will hopefully get my TVC within a week aa. I'm then going away a week or two on holidays and am planning to leave the TVC breaking-in while I'm away. But I'm wondering about a thing or two (or three) as to how to do it ... Maybe someone in this thread can help me out?

1) What volume level should I have if I leave the TVC playing while I'm away (full? half? quarter?)?
2) How far does the signal need to go for the TVC to break in, i.e. must I leave the power amp turned on?
3) If I need to keep the power amp running, can I have its volume knob set to 0 (= no sound, for the neighbours ...)

Johan
Hi, Just wanted to add to the good advice Say gave you, I would keep your TVC connected to your power amp so it sees a resistive load, the amp does not have to be switched on though. I understand the TVC won't run in properly unless it's under load, that is what I have been told anyway if it doesn't apply then please don't shoot me shoot the guy who told me instead

I hope you enjoy it I've had mine for a few months now and it's fantastic it even gives my DIY Music First TVC a run for it's money for a lot less mula aa

Have a nice vacation

Run in as suggested. Turn volume control to full gain and back off 2 clicks. Run in for 400 Hrs for total breakin cycle. Use your CDP over tuner unless your tuner has full frequency output meaning 20HZ to @000HZ. If not use CDP on repeat. Must be connected to Amp[ turned off]
Hope this helps

rollo

gitarretyp · « **Reply #1989 on:** 18 Jul 2007, 05:01 pm »

I'd really like to try a TVC in my system. Does anyone in or around austin have one they'd be willing to bring by for an audition?

GHM · « **Reply #1990 on:** 18 Jul 2007, 06:12 pm »

Quote from: gitarretyp link=topic=31621.msg#msg date=

I'd really like to try a TVC in my system. Does anyone in or around austin have one they'd be willing to bring by for an audition?

I have a (rag tag) balanced/single ended version that I'm not using .It does have the V3 trannies. I think the dual mono is a bit better though. Never the less, it will give you some idea of what the Promitheus dual mono sounds like. It is still in the box from the last curious soul I sent it too. Cover GROUND shipping from Georgia to you and you can listen too it till your heart is content!

gitarretyp · « **Reply #1991 on:** 18 Jul 2007, 07:32 pm »

Quote from: GHM on 18 Jul 2007, 06:12 pm

I have a (rag tag) balanced/single ended version that I'm not using .It does have the V3 trannies. I think the dual mono is a bit better though. Never the less, it will give you some idea of what the Promitheus dual mono sounds like. It is still in the box from the last curious soul I sent it too. Cover GROUND shipping from Georgia to you and you can listen too it till your heart is content!

Thanks for the offer; you've got a PM.

Gpj · « **Reply #1992 on:** 18 Jul 2007, 08:45 pm »

Quote from: rollo on 18 Jul 2007, 04:40 pm

Quote from: audio-heaven on 18 Jul 2007, 04:13 pm
Quote from: Jolojl on 18 Jul 2007, 02:17 pm
Hi!

Will hopefully get my TVC within a week aa. I'm then going away a week or two on holidays and am planning to leave the TVC breaking-in while I'm away. But I'm wondering about a thing or two (or three) as to how to do it ... Maybe someone in this thread can help me out?

1) What volume level should I have if I leave the TVC playing while I'm away (full? half? quarter?)?
2) How far does the signal need to go for the TVC to break in, i.e. must I leave the power amp turned on?
3) If I need to keep the power amp running, can I have its volume knob set to 0 (= no sound, for the neighbours ...)

Johan
Hi, Just wanted to add to the good advice Say gave you, I would keep your TVC connected to your power amp so it sees a resistive load, the amp does not have to be switched on though. I understand the TVC won't run in properly unless it's under load, that is what I have been told anyway if it doesn't apply then please don't shoot me shoot the guy who told me instead

I hope you enjoy it I've had mine for a few months now and it's fantastic it even gives my DIY Music First TVC a run for it's money for a lot less mula aa

Have a nice vacation

Run in as suggested. Turn volume control to full gain and back off 2 clicks. Run in for 400 Hrs for total breakin cycle. Use your CDP over tuner unless your tuner has full frequency output meaning 20HZ to @000HZ. If not use CDP on repeat. Must be connected to Amp[ turned off]
Hope this helps

rollo

Ahhh. Now we are back to normal. Good.

aod · « **Reply #1993 on:** 18 Jul 2007, 11:36 pm »

WHOA!

What is this BNP stuff.... What am I missing here dudes.
Jag

rollo · « **Reply #1994 on:** 19 Jul 2007, 01:09 am »

Quote from: aod on 18 Jul 2007, 11:36 pm

WHOA!

What is this BNP stuff.... What am I missing here dudes.
Jag

Its Black Hole Pad which I suggested to damp the vibrating trannies. It works wonders to improve the performance of all transformers. Good luck.

rollo

Gpj · « **Reply #1995 on:** 19 Jul 2007, 02:31 am »

Hello all. A summary: I rec'd my first TVC, standard edition in Five, yes 5, days. Replaced a very well made 36 step dual mono stepped attenuator w hand matched resistors and star grounding that I had used for 15 years. The improvement was obvious. Much smoother, greater depth, sweeter. rather like replacing a good ceramic plate RCA 211 with mother's best Western Electric metal plate. Smile and relax into the music. After 20 or so hours of break in (400hrs, you guys are kidding right?) disaster. A loud hum in the right channel. After switching and reswitching tubes to try to isolate the problem I tried inputting a signal and..aaargh... full output to that channel. No attenuation. Scary loud. Luckily my Quads were retired and there was no damage to the Dynaudios. The unbreakable TVC was broken.I got to Nick and he offered to send a replacement. I accepted but upgraded to a dual mono single box ref3 that was available. While waiting for my replacement TVC I returned the attenuator to the system. The sound that had brought me so much pleasure for so many years was now unlistenable. Once you hear a distortion it is impossible to tune it out. I waited. Turn around was again again five days. For those concerned about delay I had received two consecutive orders in 10 days! The ref3 is marvelous. Both units sound/sounded so organic and musical that I cannot imagine anyone not being delighted with either, regardless the level of his system. Props to Nicholas and the crew (?) at Promitheus. I will try later to discuss the minute differences between the two units. I will continue to burn the new one in past the current 120 hrs although I am not a true believer. Gotta go for now. I can hear Holly Cole in my listening room again. Damn! I told her to stop stalking me.....Gerry

tanchiro58 · « **Reply #1996 on:** 19 Jul 2007, 04:43 am »

Quote

Its Black Hole Pad which I suggested to damp the vibrating trannies. It works wonders to improve the performance of all transformers.

I would go with ebony wood which is put on top of trannies. This would help cancelling the vibration also.

NewBuyer · « **Reply #1997 on:** 19 Jul 2007, 05:58 am »

Quote from: Gpj on 19 Jul 2007, 02:31 am

...After 20 or so hours of break in (400hrs, you guys are kidding right?) disaster. A loud hum in the right channel. After switching and reswitching tubes to try to isolate the problem I tried inputting a signal and..aaargh... full output to that channel. No attenuation. Scary loud. Luckily my Quads were retired and there was no damage to the Dynaudios. The unbreakable TVC was broken...

Hey Gerry did you ever determine what specifically broke in your TVC?

Jolojl · « **Reply #1998 on:** 19 Jul 2007, 08:31 am »

Quote

Hello Jolojl. Once your tvc arrives give it a good workout. Two or three clicks from maximum will do the trick. You won't need an amp. Just press repeat on your cd player. The voltage will do the rest to break in the tvc transformers. It will take alot of time though. We kind of go by the 400 hour rule around here.

Take care.

Quote

Hi, Just wanted to add to the good advice Say gave you, I would keep your TVC connected to your power amp so it sees a resistive load, the amp does not have to be switched on though. I understand the TVC won't run in properly unless it's under load, that is what I have been told anyway if it doesn't apply then please don't shoot me shoot the guy who told me instead

I hope you enjoy it I've had mine for a few months now and it's fantastic it even gives my DIY Music First TVC a run for it's money for a lot less mula

Have a nice vacation

Quote

Run in as suggested. Turn volume control to full gain and back off 2 clicks. Run in for 400 Hrs for total breakin cycle. Use your CDP over tuner unless your tuner has full frequency output meaning 20HZ to @000HZ. If not use CDP on repeat. Must be connected to Amp[ turned off]
Hope this helps

rollo

This is really a great thread!

Say, audio-heaven and rollo, thanks a lot for the advice! Good to know I just need to let the CDP run, wouldn't like to leave the amp on for two weeks ... Very curious to know what the TVC sounds like ... Soon joining the club

.

Have a nice summer!
Johan

rollo · « **Reply #1999 on:** 19 Jul 2007, 01:03 pm »

Quote from: tanchiro58 on 19 Jul 2007, 04:43 am

Quote
Its Black Hole Pad which I suggested to damp the vibrating trannies. It works wonders to improve the performance of all transformers.

I would go with ebony wood which is put on top of trannies. This would help cancelling the vibration also.

Thanks, but that was one of my suggestions long ago as well.

rollo