Quote:
Hey,
Has anyone tried using LME49990 as buffers, with LME49990 in I/V (in the PB2, for example)?
I'm currently using dummy buffers with the LME49990 because every opamp I try as a buffer with LME49990 in I/V only diminishes clarity, even if it does improve headroom/dynamics (as with the HA5004).
Thanks,
Mike
This time around, was listening to Track Title : Lo Que Yo Más Quiero by Son By Four (2001)
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Using[/size][size=x-small]
[size=x-small][size=x-small] AD-700 headphones[/size][/size] and my old[size=x-small] standard [size=x-small]P[/size][/size]rodigy HD2 (f[size=x-small][size=x-small]or testing),[/size] with all empty socket[size=x-small]s[size=x-small], the [size=x-small]s[size=x-small]ou[size=x-small]nds [size=x-small]are distant. [size=x-small]With [size=x-small]the stock [size=x-small]OP[size=x-small]A 2604[size=x-small]AP [size=x-small]and buffer[size=x-small]/output empty, the [size=x-small]sound is t[size=x-small]inny in the highs,[size=x-small] favor[size=x-small]s some lows, not very re[size=x-small]al[size=x-small]istic (crap)[size=x-small]. Adding L49990MA in the [size=x-small]output, it enh[size=x-small]ance[size=x-small]s whatever the 2604 send[size=x-small]s it and brings [size=x-small][size=x-small]all the [/size]sounds fo[size=x-small]rwa[size=x-small]rd with a bit of d[size=x-small]et[size=x-small]ail[/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size] resulting [size=x-small]in[/size] higher qual[size=x-small]ity crap sounds.
[size=x-small]Tr[size=x-small]ied the [size=x-small]AD797[size=x-small]BR[size=x-small] [size=x-small]with the ou[size=x-small]tput empt[size=x-small]y, favors the lows an[size=x-small]d mids[size=x-small], [size=x-small]some very h[size=x-small]igh end missing but clean detailed sounds throughout. Adding the L[size=x-small]49990M[size=x-small]A in the output, takes [size=x-small]and cl[size=x-small]arifies the entire ra[size=x-small]nge and br[size=x-small]ing all sound forw[size=x-small]ards.[size=x-small][size=x-small][size=x-small] Good clean fun.
[size=x-small]Tried the NE5532N with the ou[size=x-small]tput emp[size=x-small]ty. Clear and clean with no [size=x-small]a[size=x-small]rti[size=x-small]fic[size=x-small]ial en[size=x-small]ha[size=x-small]ncements[size=x-small], [size=x-small]making [size=x-small]all sounds equal [size=x-small]acro[size=x-small]ss the ranges. Added the L49990[size=x-small]MA in the output[size=x-small] and resul[size=x-small]ted [size=x-small]in excellent sounds[size=x-small]. The entire range sound[size=x-small]ed true wi[size=x-small]th clear highlights[size=x-small], [/size] good separation[size=x-small] and [size=x-small]clarity. Highs were c[size=x-small]ri[size=x-small]sp[size=x-small].[size=x-small] [size=x-small]Lows and mids were t[size=x-small]rue. [size=x-small]Lows di[size=x-small]d no[size=x-small]t outright pound but sound clean[size=x-small] nonetheless.[/size][/size][/size][/size]
[size=x-small]I could [size=x-small]eas[size=x-small]ily live with NE[size=x-small]5532N[size=x-small](s) and the L49990M[size=x-small]A i[size=x-small]n the output socket. Rival[size=x-small]s all my past configurations when considering al[size=x-small]l around [size=x-small]realistic sounds. Very [size=x-small]enjoyable.[/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size]
The tried and true NE[size=x-small]55[size=x-small]32N are only a couple[size=x-small] bucks any[size=x-small]mo[size=x-small]re[size=x-small]. If you can only afford (1) ad[size=x-small]apter board with the [size=x-small]two L[size=x-small]49990[size=x-small]M[size=x-small]A [size=x-small]on it[size=x-small] then I would [size=x-small]us[size=x-small]e[/size] it in the outp[size=x-small]ut along with your favorite op-a[size=x-small]mps in the [/size] [size=x-small]I/V sockets.
[size=x-small]Your mileage[size=x-small] may vary.
[size=x-small]Your welcome.[/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size][/size]
(I will note that I couldn't get (3) adapted L49990MA to work on the card at once in all three sockets, not sure why but doesn't seem to be necessary.)
