How best to eliminate LP warps


I own about 2500 LPs, and I like to think they're flat.  Furthermore, I espoused the view that warped LPs ought to be discarded.  But lately I have found 2 or 3 of my LPs that do have warps but sound too good and are too precious for the music recorded on them to throw away.  So I am in the market for ideas on how to remove warps.  I am aware that there was a device on the market that looked like a large waffle maker, to be used for warp removal.  I think Furutech made it, but I never see it advertised these days.  I am also aware of the DIY method of placing an LP between two glass plates and heating the ensemble.  The question there would be how hot and for how long?  Any suggestions are welcome, especially opinions on the efficacy of the Furutech.  Thanks.  Please no comments on vacuum hold down; I think it's a great idea but none of my five turntables has that feature.

lewm

Showing 5 responses by edcyn

My brain is getting foggy but I'm ninety percent sure I once had a vacuum hold-down platter for my SOTA turntable. In any case, when it ceased to work and the thing's center bearing got noisy, I shipped the 'table to SOTA HQ and had them install a new standard platter. In any case, the hold-down did eliminate everything but severe edge warps.

As my brain continues to de-fog (thanks all you guys!), I now remember doing A-B comparisons between having the SOTA vacuum hold down on & off. Vacuum hold down gave me more weight and dynamics but I often preferred the lighter, airier sound of just letting the LP lie there on top of the platter. . Imaging was different between hold-down and non-hold-down but were equally satisfying. A screw-down clamp meantime, puts me halfway between with the best of both worlds. In any case, a screw-down clamp is the way I now almost always go.

@baylinor 

If I insulted you I'm sorry but I was hoping you got my joke.  The icon/photo you have on the upper left corner of your posts is the cover of David Bowie's "Aladdin Sane."  I'm willing to bet that Bowie came up with the title as a play on words for the phrase "A lad insane." In any event, Aladdin Sane may be my favorite rock album. My intention was to raise a toast to your good taste.

All the vicissitudes that plague the LP are part of the reason I'm just not as fanatical about the format as I used to be. It doesn't hurt that Hi-Def (and even CD quality) streaming can sound really, truly good through my system as it is currently constituted.