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Hello,
Was thinking of building a dual mono amp based on (2) of the ICE 50ASX2BTL modules. I realize that these need a balanced input signal to function.
The first question I had was "how do I control the volume"? I thought that was an easy one - I just need my phono preamp to have an output level knob, right? I'm not sure if it's that simple, but that was my first assumption. I have read a few things about these modules needing a low output impedance, and that's where I'm starting to get lost. Sounds like maybe just turning down the preamp might lead to some really unsatisfactory high frequency performance from the amp, but like I said, I start to get a little lost there. FYI, I was thinking of using a Rolls/Bellari PA550 for the preamp.
I was thinking of using a case kit from Ghent, and I saw that they offer what they call the "RTX Module". This would help create the balanced inputs from the SE outputs from the preamp. Would this also act as an input buffer and address the impedance issues?
Alternatively, I would be open to a little less power, but greater simplicity, by using a 125ASX2 stereo module with SE inputs. Same question about volume though - output level on the preamp sufficient? If I were to go the 125 route, how can I tell genuine from fake? For the 50ASX2BTL I can source them right here at PE, but for the 125 it seems like they would have to come from the bay, which is unnerving.
In summary, will this work? Turntable -> PA550 -> power amp (either dual 50BTL or 125) -> loudspeakers
Thanks in advance for any help,
Mike
Was thinking of building a dual mono amp based on (2) of the ICE 50ASX2BTL modules. I realize that these need a balanced input signal to function.
The first question I had was "how do I control the volume"? I thought that was an easy one - I just need my phono preamp to have an output level knob, right? I'm not sure if it's that simple, but that was my first assumption. I have read a few things about these modules needing a low output impedance, and that's where I'm starting to get lost. Sounds like maybe just turning down the preamp might lead to some really unsatisfactory high frequency performance from the amp, but like I said, I start to get a little lost there. FYI, I was thinking of using a Rolls/Bellari PA550 for the preamp.
I was thinking of using a case kit from Ghent, and I saw that they offer what they call the "RTX Module". This would help create the balanced inputs from the SE outputs from the preamp. Would this also act as an input buffer and address the impedance issues?
Alternatively, I would be open to a little less power, but greater simplicity, by using a 125ASX2 stereo module with SE inputs. Same question about volume though - output level on the preamp sufficient? If I were to go the 125 route, how can I tell genuine from fake? For the 50ASX2BTL I can source them right here at PE, but for the 125 it seems like they would have to come from the bay, which is unnerving.
In summary, will this work? Turntable -> PA550 -> power amp (either dual 50BTL or 125) -> loudspeakers
Thanks in advance for any help,
Mike
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