I am thinking of the Transfiguration Phoenix S cartridge to with the phonocube. Has anyone heard the Transfiguration ?
Cartridge options for current gain phonostages (47 Labs)
Hi,
I have a 47 Labs phonocube which I have not been using because I do not have a "matching" cartridge. It is a current gain phonostage. Its input impedance is 0 ohms and it amplifies current rather than voltage. That basically means a low impedance cartridge is the first thing it needs. I had the ART-9 which is a 12 ohm cartridge and it was not a great pairing with phonocube. I am now in the market for a new cartridge and would like to buy a low impedance high current cartridge. The Transfiguration Proteus is one of them but it is expensive.
Looking for suggestions on other options. Primarily the higher is the voltage/impedance value the better.
Budget is around $2k.
I have a 47 Labs phonocube which I have not been using because I do not have a "matching" cartridge. It is a current gain phonostage. Its input impedance is 0 ohms and it amplifies current rather than voltage. That basically means a low impedance cartridge is the first thing it needs. I had the ART-9 which is a 12 ohm cartridge and it was not a great pairing with phonocube. I am now in the market for a new cartridge and would like to buy a low impedance high current cartridge. The Transfiguration Proteus is one of them but it is expensive.
Looking for suggestions on other options. Primarily the higher is the voltage/impedance value the better.
Budget is around $2k.
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- 18 posts total
Pani, The only criteria for performing with your phonocube or some other current-driven phono stage are internal resistance/impedance and inductance. Ideally also you want a cartridge with very low voltage output. But since all these parameters go hand in hand, it’s easy. I would stick with LOMCs that have a published internal resistance of less than 10 ohms; the lower, the better. I read elsewhere that, yes, the Transfiguration LOMCs ought to work (but I don't know offhand how they measure). Note that HOMC cartridges are not a good bet, by the same tokens. |
Well, i’m in, hope it’s not too late :) As the owner of two different Miyabi cartridges (MCA and Standard) i just bought 47 Labs 4712 Phonocube with Humpty. Pani told me he never tried his ex 47 Labs phono cube with Miyabi cartridge. This is exactly what i’m gonna try! Fascinated by Nelson Pass current source power amp (First Watt F2J) in my system i am up for "current injection" phono stage with ZERO load impedance finally. Hope i am not alone ... MORE ABOUT PHONOCUBE: Input impedance 0 ohm Most of currently available phono equalizers are designed to amplify the voltage that appears at both ends of a resistor when a current generated by the cartridge is carried to the ground through this resistor. Our Phonocube has a unique and original circuitry ( with input impedance of 0 ohm), which enables all of the current generated by the cartridge to flow directly into the amplifying circuit. Although NF type circuitry is known for its high S/N ratio, a rise in the high frequency is always inevitable. The unique equalizing circuit of Phonocube allows the same level of high S/N ratio while maintaining the smooth and accurate equalizing character of the CR type. To preserve the freshness of the sound, we reduced the number of parts as much as possible, 25 per channel, and achieved the shortest signal pass length ever (44 m/m). The chassis of Phonocube is constructed from two aluminum tubular frames ( 40 x 80 m/m section ) and front and rear panels of 10 m/m thick machined aluminum. Each circuit of left and right channels is encased in a separate chassis to eliminate interference between them and to achieve ideal dual mono structure. Compatibility: Features:
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- 18 posts total