RuffzGuts
Super Member
What a beautiful Amplifier...Who ever Engineered this one wanted it to last for ever..!
This one was well loved or used and abused, ...Ive had it on the shelf for years as it had high DC offset, around 120Mv each channel...
after full recap including main filters which were way under par, 18000uf...@ around 12000uf....replaced with 22000uf..
What is special about this amp is the engineering, its a treat to work on, the pcbs are high quality, you have component numbers both sides of boards..high quality all the way...I have been fighting with this Marantz receiver and have formed a low opinion regarding design , and in comparison...actually, I think Hitachi is bench mark in this price range..hats off to who ever designed this amp...its a piece of art...
So anyway, after recap, I had hoped to see that DC offset cured...not the case....pretty even both channels at around 115mV...
So impatient i plugged into my dummy loads...and damn it sounds good...seriously good...couldn't help my self and plugged into my yammy NS-10s...too be honest i find it hard to believe this could sound any better...completely blown away....
I want to chase this offset down...I can replace the input pairs, but i gotta wonder, how good can it get? i had a hearing test the other day and scored surprisingly perfect...
i will definitely chase this down regardless...its just interesting i think, respect to echowars on his valued thread regarding dc offset...
all i am saying is this amp sounds frickin amazing...and i have 120mv both channels...
This one was well loved or used and abused, ...Ive had it on the shelf for years as it had high DC offset, around 120Mv each channel...
after full recap including main filters which were way under par, 18000uf...@ around 12000uf....replaced with 22000uf..
What is special about this amp is the engineering, its a treat to work on, the pcbs are high quality, you have component numbers both sides of boards..high quality all the way...I have been fighting with this Marantz receiver and have formed a low opinion regarding design , and in comparison...actually, I think Hitachi is bench mark in this price range..hats off to who ever designed this amp...its a piece of art...
So anyway, after recap, I had hoped to see that DC offset cured...not the case....pretty even both channels at around 115mV...
So impatient i plugged into my dummy loads...and damn it sounds good...seriously good...couldn't help my self and plugged into my yammy NS-10s...too be honest i find it hard to believe this could sound any better...completely blown away....
I want to chase this offset down...I can replace the input pairs, but i gotta wonder, how good can it get? i had a hearing test the other day and scored surprisingly perfect...
i will definitely chase this down regardless...its just interesting i think, respect to echowars on his valued thread regarding dc offset...
all i am saying is this amp sounds frickin amazing...and i have 120mv both channels...