Mono equalization recording curves question

Vinyl Asylum

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I have several hundred mono classical, many are from the early fifties and from what I have learned about that here, some may not have been recorded with the RIAA equalization curve. A few questions if I may-
1-how do you know what equalization was used if there is no information on the label stating what curve was used? Some later London's state RIAA curve used but earlier ones don't say anything at all
2-did different labels use different curves until the late 50's?
3-is there a preamp out there with standard curves that might have been used back then, so you could just push a switch and keep trying different curves until it sounds "best"?
4-without a mono cartridge, but with a mono switch on the integrated amp I use, could I even tell the difference.
I ask all this since some early records I have sound great and others somewhat muffled or less bright, and I don't know why. Thanks Norm

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Topic - Mono equalization recording curves question - gonzo 13:54:10 04/15/07 (8)

Some more great info - ffrr 00:14:19 04/16/07 (0)

Here's some info... - Jim Hagerman 17:27:57 04/15/07 (2)

Thank you for responding, another question if I may - gonzo 17:36:50 04/15/07 (1)

the -best- sound? - OMalley 19:48:09 04/15/07 (0)

I use one of those Bugle Pro pre amps that master Elison recommends - OMalley 16:40:23 04/15/07 (2)

Will it equalize a Columbia Stereo classical? - violinist3 17:07:16 04/15/07 (1)

if you look at the link JH provides above - OMalley 17:36:11 04/15/07 (0)

Re: Mono equalization recording curves question - John Elison 15:40:29 04/15/07 (0)

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