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Advice Needed on Mono Phono Preamps

I am in the process of putting together a system for playback of mono LPs and 78s. My intent is to use the phono preamp with the line stage of my existing preamp. The only "current" production mono phono preamps with selectable EQ curves that I have been able to identify are (1) the Sentec EQ-10, (2) the KAB EQS MK12, and (3) the Graham Sell Jazz Club. I am impatiently awaiting Art Dudley's anticipated review of the Sentec and KAB, but in the meantime...

For anyone who has experience listening to any/all of these or others, I would appreciate any guidance on the followig:

1. Have I missed anything that I should be considering?
2. Are there vintage mono phono preamps that should also be considered for this purpose?
3. Is a step up necessary with low output carts for any/all of these?

Thanks very much for any help.
jeffreybowman2k
pryso
1,938 posts
 
A few cautions - First, most American labels adopted the RIAA curve by 1955 but not all, and some eastern European and Asian companies not until the '70s. Therefore selectable EQ may benefit a good number of older LPs. Second, many different EQs were used by different LP labels so a phono stage or preamp with only 2-3 variations to the RIAA standard might not be all that helpful, and even more were utilized for 78s. Third, cartridge design (stereo/mono), stylus shape and tip size should be considered for both older LPs and 78s. Here is a link to the best summary I've found (check the sub-links for detailed EQ info) -

http://geocities.com/midimagic@sbcglobal.net/mixphono.htm

Art Dudley has been exploring this subject in recent reviews in Stereophile. Here are a couple more options for selectable EQ -

http://www.esotericsound.com/elect.htm
http://www.vadlyd.dk/English/RIAA_and_78_RPM_preamp.html

Looks like a bit more research is called for on your part Jeff.
Good luck.
t_bone
1,182 posts
 
Thanks Pryso. Can you repost your first link? It does not appear to have worked.
pryso
1,938 posts
 
Sorry, T_bone, and any others looking for this great resource.

http://geocities.com/midimagic@sbcglobal.net/mixphono.htm

I trust this time it will link you up.
t_bone
1,182 posts
 
Sorry Pryso, it didn't work that time either, though href=http://geocities.com/midimagic@sbcglobal.net/mixphono.htm>this
one should.

And thanks, that is a great link.
plinko
256 posts
 
You might try the JE Labs design: http://members.myactv.net/~je205d/mono.htm if your into DIY or could have a tech/builder build it. I'm listening to it and it is superb.

I have heard the Sentec unit and it is superb. But that was with a Shindo amp/Garrard and Shindo Latour speakers. Quite the system.
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