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donsachs

Responses from donsachs

300B Tube Amps with 15/16 Watts Per Channel?
I used to fix guitar amps for musician friends.  They are pretty simple.... (the amps, not the guitarists!)...  except Marshalls, which have many small pcbs and jumpers and inevitably it would be a failed bias pot on the board buried the deepest i... 
300B Tube Amps with 15/16 Watts Per Channel?
Hit post too soon..  Great iron, not just good iron.  The kind of transformers that give you goosebumps if used in the right circuit.   If you use a Hammond, you will never hear what the circuit can do....  
300B Tube Amps with 15/16 Watts Per Channel?
@atmasphere I agree on the vintage amp transformers.  The citation II amps were legendary and would be flat down to about 8 or 9 Hz at full power.  The Sherwoods were generally pretty good as well as the Scotts and Fishers.  The Eico stuff can var... 
300B Tube Amps with 15/16 Watts Per Channel?
I read something years ago that stuck with my and I have always tried to heed.  A really good tube amp is the sum of three things.  How good is the circuit, how good is the power supply, and how good is the iron (transformers).  Those who favour O... 
300B Tube Amps with 15/16 Watts Per Channel?
Or you can simply use speakers that will run happily on 10 watts and build a very simple (well not that simple actually if you consider power supplies and transformers, etc..)  push pull amp with no feedback that is flat from 20-20K with very low ... 
300B Tube Amps with 15/16 Watts Per Channel?
We all have different views as manufacturers and that is as it should be.  I don't give detailed advice because some of my views will clash with others and that is not what I really want to do on a public forum.  I will say from years of experienc... 
Spatial Audio Raven Preamp
For anyone interested who perhaps has a Raven already...  Spatial has one last pair of the original pre-production Blackbird amps that they are going to sell at a discount.  David will post them on his site shortly.  If you are interested you can ... 
300B Tube Amps with 15/16 Watts Per Channel?
@vthokie83 Just curious.  What speakers is your friend driving with the Blackbird 300b amps?  Just another data point!  
300B Tube Amps with 15/16 Watts Per Channel?
@vthokie83 Interesting.  If you do get the chance then please post your impressions!  
300B Tube Amps with 15/16 Watts Per Channel?
@vthokie83 Yes, the Blackbirds measure out at about 24 wpc. I know Aric and he builds seriously good tube gear. He is a master craftsman. That said, I wish you could hear the Blackbirds with the matching Raven preamp:) It would be a different exp... 
300B Tube Amps with 15/16 Watts Per Channel?
@dietrdeb  I wasn't really suggesting you buy the Blackbirds, just that if you do the 300b route I really think PP is best IMHO.  My system is fully balanced from Pacific 2 through to the amp speaker terminals.  It is so quiet that I cannot even ... 
300B Tube Amps with 15/16 Watts Per Channel?
@debjit_g  There is an old customer of mine who has a prototype pair of the design used for the Blackbird amps that Spatial audio is producing.  PP300b and they produce about 24 watts/ch.   He has one of the Cube speakers as I recall and the amps ... 
Spatial Audio Raven Preamp
@rav6258  Yes, it is 64 step attenuator, and the first step is 00.  It should be screamingly loud by 50, and most listening levels should fall in the 25-55 range on most systems.  Is that not the case in your system?  63 would blow the speakers o... 
Spatial Audio Raven Preamp
To follow up on what Lynn just posted.  I spent my time rebuilding vintage tube gear with modern parts, then I decided to make my own and always tried to make it reasonably affordable and be better than the vintage gear.  The Raven and Blackbirds ... 
Spatial Audio Raven Preamp
@rav6258 I looked at the Bottlehead kit and indeed it is a steal for what the price was.  I expect that it sounded very good.  They cut corners for the price point, but made some very clever choices.  Just looking at the kit photo I would expect t...