Over half of the cds are not good, what can I do?

Not every CD or DVD player is able to correctly ready every single brand of writable media. The situation you described is quite common, and the only solution is to use another brand of media. Some people recommend burning at a slower speed, but I don't think this helps at all.
This situation might be caused by incompatibility between the laser on your player and the formulation of the writable surface. You should test other brands and find one that works with all your devices. When you find it, stick with it.

you should test you cd player using a proper music cd then you no if its the cd's you purchased

You need to finalize the cd on your memorex.

The choice between 50 and 100 CDs is just a matter of how many CDs you want to select from. As far as the amplifier, unless you have extension speakers, you don't need a 400 watt amplifier.

THE PHILLIPS CDR 770 WILL ONLY RECORD ON "MUSIC" CD'S.I USE A MEMOREX MUSIC CD FROM WAL-MART, IT'S A 40X700MB 80 MIN, IT WORKS FINE, HOPE THIS HELPS, GOD BLESS, PAUL

the cds you put in there are not compatible to the player.if it had been playing the same cds then it is time to take your set to a tech for repair it can be your memory chip or your lens.good luck.

memorex record to CDs --- CD will not play on other units

I once bought a pack of Comp USA CDs at Goodwill for about $3.00. Package was sealed, brand new. About half of them were good and if I remember the others gave the same message that you are getting. So defective stuff does get out. I could actually see the defect in the bad discs.

All you guys looking for AUDIO burner CDs' should try the MEMOREX CD-R MUSIC CDs. These are a new product, released to REPLACE the TDK XA80 AUDIO CDs.

Stocks are a bit low right now - but only because this is a new product - and people like me are buying up big.

'Tanya' at JB Hi Fi in Erina Fair on the NSW Central Coast, has promised me that she will be ordering plenty of these discs because she is aware of our dilema. Apparently Head Office of JB HiFi has also advised their numerous stores of this MEMOREX product and they should all be having them in stock shortly.

Product description:
Red cardboard box with 10 blank CDs in slim jewel cases. Marked "Memorex Music CD-R" 700MB (80min) Mine cost me $8.95c for this pack of ten.

These work fine on my stand alone, Hi-Fi LG dual tray burner and also on a mates' Pioneer CD burner. Good luck and thank God for Memorex!

Gary, Gosford NSW.

It has nothing to do with memorex. There are few possible causes. Perhaps you're using incompatible format (CD-R, CD+R...). Also, perhaps those CDs were burned on another computer and left unclosed. Check the CD format and check if the CDs are closed or opened for additional files.