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Active FETs vs. Step-up phono stage designs

I've noticed quite a few threads on A-gon discussing step-up transformers recently, and it got me thinking of the different applications in the phono stage design. I'm curious of the advantages and disadvantages of designs that employ step-up transformers vs. active designs with FETs, especially in tube preamps. Examples would be the new Manley Chinook vs. the Rogue Audio Ares with its custom Cinemag transformers, or the highly-regarded Andros, which also went the step-up route. I'm thinking of upgrading my solid stage phono preamp in the near future, and would like to hear your opinions (and I know we have a few designers posting regularly) regarding this subject.

actusreus
dgarretson
2,600 posts
 
The discontinued MAT02 is replaced by MAT12.

http://www.analog.com/static/imported-files/data_sheets/MAT12.pdf

Like Lew I use this at input of phono in the bottom of a hybrid cascode. It provides huge gain, low noise, and great sound.
lewm
13,230 posts
 
Thanks for that URL, Dave. I did not know about MAT12. I wonder if it is equally suitable to our application, compared to the MAT02.
dgarretson
2,600 posts
 
Lew, another hobbiest has used MAT12 interchangeably with MAT02 in this application, so I don't think there is any issue.
dhl93449
455 posts
 
Have you noticed the pricing on this part? $15 in thousands quantity? No wonder folks are being driven to op amps.
lewm
13,230 posts
 
I guess I would be reluctant to buy $15,000 worth, in hopes of selling the extra ones to "friends". Even for a manufacturer, that would be a lot of investment for one part. But generally if you search diligently you can usually find a vendor who is willing to sell parts in low volume.
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