ppl
Building amps and assuring water resistance.
- Joined
- Jun 21, 2001
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Well for alot of us head-fiers the long awaited dual version of Analog devices AD-8610. Well afteer mounths of antisipation ti is available see at http://products.analog.com/products/...product=AD8620 As soon as i got ahold of $ of these I imeditly installed one in a SOIC to DIP Adaptor socket and fitted the AD-8620 that used to Employ an AD-746 with an AD-823 prior to that. Well the current Drain of my Pocket amp went down from 15 Ma to 11.1 from the 746 to the 8620 infact the AD-824 Pulled 13.26 Mill's from the series connecten 9 v's. see my post in the AD-8512 Review.
THE SOUND , well its extreamly close to the Single AD-8610. Thei mprovement over the 746 was quite noticable. First was about what appeared to be about an octave of bass extention. this made the Parralell pair of EL-2001 buffers really come alive. and this was with out the midbass Presesnce of The 823 In fact the 8610/8620 are the most naturel sounding mid-bass and silky sooth midrange i have heard from an opamp.Most all opamps eather roll off the last 10-20K octave and or add a upper midrange presence in the3-7KHz. range. These analog Device opam's are compleatly devoid of this nasty quality that seem to be Be present in lessor Opamps. The 10-20K range on the 8610/20's is crystal cleen and Hightly detailed with plenty of rendition of upper harmonic detail to Flute and other high pitched wind insterments. Strings are reproduced with quick articulation that is quite plesent to listen to. the total lack of grain is so refreshing once it is no longer present. these devices have fooled some seasoned listeners into thinking that thay were listen to a discrete component and were embarresed to find a lowy Opamp and to pour salt into the wound a IC output stage to boot.
The AD8620 leaves all other Dual opamps in the dust Musicaly the soundstage is Better than the 823 of whitch i allready thought soundstage was it's halmark. Another most instantly noticed quality of the 8620 was the compleatly silent background the musical transients blend into, Now i am not talking noise but however refering to the Tendicy of almost all other opamps to blur transients to the point of not obtaining complete silence befor the next transient arrives. In terms of sound quality it is so close to the 8610 single that most listeners would be hard pressed to here any difference.
in conclusion This dual opamp will operate quite well on the battery voltages most DIYers use a pare of 9 volts almost perfect for it's +/- 13 Volt Supply Limit. these opamps are incredibly stable more-so than any of the A- 823,8512,746,OPA-627,2107,132.
My pick for opamps's of the year award This pair of recent Opamps from Analog devices is so far ahead of what has been available as to redefine the Benchmark for Audio Opamp's
THE SOUND , well its extreamly close to the Single AD-8610. Thei mprovement over the 746 was quite noticable. First was about what appeared to be about an octave of bass extention. this made the Parralell pair of EL-2001 buffers really come alive. and this was with out the midbass Presesnce of The 823 In fact the 8610/8620 are the most naturel sounding mid-bass and silky sooth midrange i have heard from an opamp.Most all opamps eather roll off the last 10-20K octave and or add a upper midrange presence in the3-7KHz. range. These analog Device opam's are compleatly devoid of this nasty quality that seem to be Be present in lessor Opamps. The 10-20K range on the 8610/20's is crystal cleen and Hightly detailed with plenty of rendition of upper harmonic detail to Flute and other high pitched wind insterments. Strings are reproduced with quick articulation that is quite plesent to listen to. the total lack of grain is so refreshing once it is no longer present. these devices have fooled some seasoned listeners into thinking that thay were listen to a discrete component and were embarresed to find a lowy Opamp and to pour salt into the wound a IC output stage to boot.
The AD8620 leaves all other Dual opamps in the dust Musicaly the soundstage is Better than the 823 of whitch i allready thought soundstage was it's halmark. Another most instantly noticed quality of the 8620 was the compleatly silent background the musical transients blend into, Now i am not talking noise but however refering to the Tendicy of almost all other opamps to blur transients to the point of not obtaining complete silence befor the next transient arrives. In terms of sound quality it is so close to the 8610 single that most listeners would be hard pressed to here any difference.
in conclusion This dual opamp will operate quite well on the battery voltages most DIYers use a pare of 9 volts almost perfect for it's +/- 13 Volt Supply Limit. these opamps are incredibly stable more-so than any of the A- 823,8512,746,OPA-627,2107,132.
My pick for opamps's of the year award This pair of recent Opamps from Analog devices is so far ahead of what has been available as to redefine the Benchmark for Audio Opamp's