davidismynaim
23-09-2012, 21:32
Hi everyone, looking for someone with more experience than me as to an idea I have with some recently acquired HiFi.
I have an M-DAC which has the option of balanced output via XLR. I have just bought a beast of a SS amp off ebay - it is a DBX BX3 4 channel power amp.
It has 2x stereo phono inputs, with 3 modes, 4 way, 3 way and bridged 2 way. Someone suggested I could make up special XLR to 2 phono cables. Hot to one phono, cold to the other, both sharing the earth. These 2 cables could then be used as the input with the amp in 4 way mode. connecting the speakers to only the red terminals.
I have never used balanced connections and this is pushing my knowledge to the limit. But as I understand this arrangement, the speaker would see the differential between the +ve and -ve polarity on the two speaker posts and this would cancel out any common noise. Have I got this right and does this sound like a sensible plan?
The alternative is to switch the amp into bridge mode and connect up using a single set of unbalanced phono cables.
thanks for any help here...
PS I have just bought a pair of Yamaha NS1000M (a speaker I have wanted for over 35 years, so felt it was about time to scratch that itch!) Having the tired black cabinets re-veneered in light oak... If the Balanced arrangement works it will be about 300W amp, so I am planning to use 20db attenuators on the back of the M-DAC, and the amp has gain control too, so should be ok?
Any thoughts...
I have an M-DAC which has the option of balanced output via XLR. I have just bought a beast of a SS amp off ebay - it is a DBX BX3 4 channel power amp.
It has 2x stereo phono inputs, with 3 modes, 4 way, 3 way and bridged 2 way. Someone suggested I could make up special XLR to 2 phono cables. Hot to one phono, cold to the other, both sharing the earth. These 2 cables could then be used as the input with the amp in 4 way mode. connecting the speakers to only the red terminals.
I have never used balanced connections and this is pushing my knowledge to the limit. But as I understand this arrangement, the speaker would see the differential between the +ve and -ve polarity on the two speaker posts and this would cancel out any common noise. Have I got this right and does this sound like a sensible plan?
The alternative is to switch the amp into bridge mode and connect up using a single set of unbalanced phono cables.
thanks for any help here...
PS I have just bought a pair of Yamaha NS1000M (a speaker I have wanted for over 35 years, so felt it was about time to scratch that itch!) Having the tired black cabinets re-veneered in light oak... If the Balanced arrangement works it will be about 300W amp, so I am planning to use 20db attenuators on the back of the M-DAC, and the amp has gain control too, so should be ok?
Any thoughts...