this amplifier have a very good sound
is modified from MCM 100 Watt Subwoofer Amplifier Module
http://www.mcmelectronics.com/product/50-6272
with big Sanken final stage
and 8x 4700uF/50V little capacitors on PSU
also using digital input DAC: 8 x TDA1543 in parallel
another lucky idea
http://www.diyfidelity.com.au/product_info.php?cPath=0_35&products_id=41
modified without AD847 I/V converter and filter
+ 3uF capacitor output + potentiometer for volume adj
🙂
is modified from MCM 100 Watt Subwoofer Amplifier Module
http://www.mcmelectronics.com/product/50-6272
with big Sanken final stage
and 8x 4700uF/50V little capacitors on PSU
also using digital input DAC: 8 x TDA1543 in parallel
another lucky idea
http://www.diyfidelity.com.au/product_info.php?cPath=0_35&products_id=41
modified without AD847 I/V converter and filter
+ 3uF capacitor output + potentiometer for volume adj
🙂
Attachments
Something looks very wrong with the amplifier schematic. Are you sure it's correct?
As far as the DAC goes NOS == NFG.
As far as the DAC goes NOS == NFG.
He didn't draw it correctly.
http://www.mcmelectronics.com/content/ProductData/Spec Sheets/50-6272.pdf
http://www.mcmelectronics.com/content/ProductData/Spec Sheets/50-6272.pdf
if you see pdf drawing
there are transistor on supply just for enable circuit
two resistor made voltage shunt
also i have reduce NFB with a potentiometer
there is a little distorsion
but more and more armonics
there are transistor on supply just for enable circuit
two resistor made voltage shunt
also i have reduce NFB with a potentiometer
there is a little distorsion
but more and more armonics
Version "2" ---> Cap-Out
see this modification
short the capacitor of voltage balance in NFB
and add 6X 4700uF capacitors on OUT
this solution expand your sound like a tube amp
because don't force the zero point on output
similar of transformer push-pull
next upgrade Ver. 3
fully complementary bipolar input...
see this modification
short the capacitor of voltage balance in NFB
and add 6X 4700uF capacitors on OUT
this solution expand your sound like a tube amp
because don't force the zero point on output
similar of transformer push-pull
next upgrade Ver. 3
fully complementary bipolar input...
Attachments
Conclusions:
the traditional method to adjust automatically the dc offset outgoing from solid state audio amplifiers
is completely wrong from the point of view of the dynamic behaviour and integrity of musical timbre
because it adds compression emphasis to signal depending on the area described by the same
viceversa, the method of Free Run Mode®
allows through a decoupling of balanced capacitors
a proper transfer of information
and returns a natural sounding.
the traditional method to adjust automatically the dc offset outgoing from solid state audio amplifiers
is completely wrong from the point of view of the dynamic behaviour and integrity of musical timbre
because it adds compression emphasis to signal depending on the area described by the same
viceversa, the method of Free Run Mode®
allows through a decoupling of balanced capacitors
a proper transfer of information
and returns a natural sounding.
Attachments
Re: Conclusions:
You simply have translated thi input capacitor to the output. The effrect is the same. Bass cut.
Stee said:
You simply have translated thi input capacitor to the output. The effrect is the same. Bass cut.
OCN - Output Capacitor Ness
put in the output two or more capacitors
in balanced configuration
to decopuling DC on loudspeakers
don't create emphasis
if you have a pair of bipolars
with the same gain (selected)
you can feel the difference
when connect ground to the central point:
nothing
viceversa
have a resistor + single capacitor on input (integrator)
sure force your offset on zero voltage
but need time to discharge this value
try to short and listen LiveWave
😉
put in the output two or more capacitors
in balanced configuration
to decopuling DC on loudspeakers
don't create emphasis
if you have a pair of bipolars
with the same gain (selected)
you can feel the difference
when connect ground to the central point:
nothing
viceversa
have a resistor + single capacitor on input (integrator)
sure force your offset on zero voltage
but need time to discharge this value
try to short and listen LiveWave
😉
Attachments
frequency response is sufficient
the difference
at a glance
is the architecture :
the output capacitors regenerating another
because in parallel on the load
in the serial configuration instead
(the negative input integrator):
the load is in series
then suffers a delay
therefore involves a deflection
you can feel difference just with a simple test
trusted me, is not a detail
the difference
at a glance
is the architecture :
the output capacitors regenerating another
because in parallel on the load
in the serial configuration instead
(the negative input integrator):
the load is in series
then suffers a delay
therefore involves a deflection
you can feel difference just with a simple test
trusted me, is not a detail
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