hi, I have nice parasound d/ac 1500 laying arround. it uses 102 000uf PS filter, 3 trafo, cs 8412 receiver and 4x Burr brown pcm 63P (K) 2 operating in push-pull to every channel ,fully balanced digital operation.
it has folowing outputs
balanced- 6V nominal 1.2Kohm
unbalanced 3V nominal 600 Ohm
manuf recomends minimum 10Kohm suitable load
some rewiewers notice that output even is too strong.
question - is it good iea to put in discrete volume attenuator and run directly to poweramp. this dac will work without any loss in quality feeding one amp? I even thinking feed 2 amps.
poweramp is Pass labs xa100 clone and Aleph 5 clone.
is it posible to attenuate balanced signal and how to do this.? this is the main question.
pass labs power amp aleph 5 has 10kohm unbalanced and balanced probably 25 kOHm. aleph x ???
so will they work together? I dont mean SPL but quality. I have noticed that sometimes even cheap preamp works better that DACT atenuator.greater image and microdynamic at low levels. and how to make discrete atennuator to reduce balanced signal?
😕
thanks for any help.
it has folowing outputs
balanced- 6V nominal 1.2Kohm
unbalanced 3V nominal 600 Ohm
manuf recomends minimum 10Kohm suitable load
some rewiewers notice that output even is too strong.
question - is it good iea to put in discrete volume attenuator and run directly to poweramp. this dac will work without any loss in quality feeding one amp? I even thinking feed 2 amps.
poweramp is Pass labs xa100 clone and Aleph 5 clone.
is it posible to attenuate balanced signal and how to do this.? this is the main question.
pass labs power amp aleph 5 has 10kohm unbalanced and balanced probably 25 kOHm. aleph x ???
so will they work together? I dont mean SPL but quality. I have noticed that sometimes even cheap preamp works better that DACT atenuator.greater image and microdynamic at low levels. and how to make discrete atennuator to reduce balanced signal?
😕
thanks for any help.
The best way to attenuate the input to an X amp is to place
resistance in series. The Alephs generally will prefer a
divider on the input.
resistance in series. The Alephs generally will prefer a
divider on the input.
thanks Mr. Nelson again for clearing clouds on sky. that probabaly means that aleph 5 in unBALANCED mode works in best in clasic mode (attenuator + input/output. and ground. 3pins required on attenuator now I am using 20k atenuator hooked this way to it. )
and aleph x in BALANCED mode best will work with two pins atten. only conected + input/output? I suppose Atenuator in balanced mode conacts to + not - or gnd?
if I am wright , so how to conect aleph 5 in BALANCED mode?. not like Aleph x? not only in series like aleph x?
😕
and aleph x in BALANCED mode best will work with two pins atten. only conected + input/output? I suppose Atenuator in balanced mode conacts to + not - or gnd?
if I am wright , so how to conect aleph 5 in BALANCED mode?. not like Aleph x? not only in series like aleph x?
😕
same confuguration
Hello,
i have nearly the same configutation. I have a parasound dac 1600 ( i think it is nearly the same as the dac 1500) and an Aleph 5 clone.
Since now, I run them single ended with a alps black beauty 100 k Ohm pot ( not the best arrengement, I guess).
Now I am wondering if I can make a balanced shund attenuation with 2,5 K Ohm resistors in series with either the positive and the negative output of the balanced dac and 12 switched resistors (24 in the future, but I have a 12 position switch from siemens laying around) between this two lines.
Does someone know if this is possible and are there ideas for the values of the resistors ?
Thanks
Dirk
Hello,
i have nearly the same configutation. I have a parasound dac 1600 ( i think it is nearly the same as the dac 1500) and an Aleph 5 clone.
Since now, I run them single ended with a alps black beauty 100 k Ohm pot ( not the best arrengement, I guess).
Now I am wondering if I can make a balanced shund attenuation with 2,5 K Ohm resistors in series with either the positive and the negative output of the balanced dac and 12 switched resistors (24 in the future, but I have a 12 position switch from siemens laying around) between this two lines.
Does someone know if this is possible and are there ideas for the values of the resistors ?
Thanks
Dirk
If I understand it correctly, the DAC want to see 10Kohm or
more as a load, so I would suggest a 10K series resistor and
a variable shunt whose resistors ad up to 20k to 30K ohms.
😎
more as a load, so I would suggest a 10K series resistor and
a variable shunt whose resistors ad up to 20k to 30K ohms.
😎
Thank you so much for your answer Mr. Pass,
it is unbelievible, that you take time to answer such questions like mine.
I think this is a nice configuration for a balanced attenuation, because it requires only a two deck switch for two chanels. But I'm wondering if there are some contras, because there are not many who uses that configuration.
So the best configuration might be a 5k resistor in the positive signal-line and another 5k resistor in the negative signal-line to get the 10 k ohme output for the dac and between that to lines switchable resistors from zero ohm (for lowest level) and 20k ohm (for highest level) ?
Can I pick up the correct values of the resistors out of the spreadshields for shunt attenuators?
Greetings
Dirk
it is unbelievible, that you take time to answer such questions like mine.
I think this is a nice configuration for a balanced attenuation, because it requires only a two deck switch for two chanels. But I'm wondering if there are some contras, because there are not many who uses that configuration.
So the best configuration might be a 5k resistor in the positive signal-line and another 5k resistor in the negative signal-line to get the 10 k ohme output for the dac and between that to lines switchable resistors from zero ohm (for lowest level) and 20k ohm (for highest level) ?
Can I pick up the correct values of the resistors out of the spreadshields for shunt attenuators?
Greetings
Dirk
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