James Evans
Bedroom Bodger
Fairly old ground I know, but it's taken me some time to get round to acquiring these sizeable little boxes.
Firstly, must commend Elfa on their customer service - ordered 4 caps last friday and they arrived from sweden on wednesday - speedier service than some UK based companies I've dealt with.
So, here they are, wife goes out to yoga wed eves and the nipper amazingly decides to have an early night. Can't believe my luck...
Whip the OA21 out of the rack and dive inside (must say its a damn site easier tinkering inside this than the claymore and obelisk3). Out come the 2 100uf 6.3v caps, and after some wedging, in go the mmks. As a full update, the 4.7uf power amp coupling caps have been replaced with 3.3uf polyprops and psu caps are mundorf mlytics, which I managed to squeeze into the existing pcb slots in the end. Pre section is passive in the onix so all I've now got between the output opamps (lm4562) in my rcd1070 are 10uf polyprop coupling caps in the cdp, then the polys and mmks in the onix - no lytics anywhere, bonanza.
It's been playing for an hour or so now running through some standard test tracks and initial impressions are very positive - no loss of bass at all and things have tightened up down there. Much much cleaner highs - instrument and voice separation is vastly improved. High hats sound more realistic, speedy snare jiggery pokery on cinematic orchestra's everyday is crystal clear - every beat can be distinguished. Harshness reduced as well - can go louder without fatigue.
Happy camper thus far.
I've got 2 more, so the claymore goes under the knife next to remove the 100uf cerafines currently on feedback duty.
Then its off to order 4 more for the obelisk....
edit:
and inspired by PDs post on his power amp refurb I had to try out she's lost control - there is indeed a sub bass part that was previously indistinguishable, marvelous, now, off for more listening...
Firstly, must commend Elfa on their customer service - ordered 4 caps last friday and they arrived from sweden on wednesday - speedier service than some UK based companies I've dealt with.
So, here they are, wife goes out to yoga wed eves and the nipper amazingly decides to have an early night. Can't believe my luck...
Whip the OA21 out of the rack and dive inside (must say its a damn site easier tinkering inside this than the claymore and obelisk3). Out come the 2 100uf 6.3v caps, and after some wedging, in go the mmks. As a full update, the 4.7uf power amp coupling caps have been replaced with 3.3uf polyprops and psu caps are mundorf mlytics, which I managed to squeeze into the existing pcb slots in the end. Pre section is passive in the onix so all I've now got between the output opamps (lm4562) in my rcd1070 are 10uf polyprop coupling caps in the cdp, then the polys and mmks in the onix - no lytics anywhere, bonanza.
It's been playing for an hour or so now running through some standard test tracks and initial impressions are very positive - no loss of bass at all and things have tightened up down there. Much much cleaner highs - instrument and voice separation is vastly improved. High hats sound more realistic, speedy snare jiggery pokery on cinematic orchestra's everyday is crystal clear - every beat can be distinguished. Harshness reduced as well - can go louder without fatigue.
Happy camper thus far.
I've got 2 more, so the claymore goes under the knife next to remove the 100uf cerafines currently on feedback duty.
Then its off to order 4 more for the obelisk....
edit:
and inspired by PDs post on his power amp refurb I had to try out she's lost control - there is indeed a sub bass part that was previously indistinguishable, marvelous, now, off for more listening...