Whats the difference between type 1 and type 2 ?

These are IEC (International Electrotechnical Committee) standards. They provide broad standards for all tapes, and end the need to align a deck for an individual tape. Type 1 is for normal "iron oxide" tapes (Fe2O3), Type 2 is for high-bias "chromium oxide" tapes (CrO2), Type 3 (obsolete) is for FeCr (ferric chrome), and Type 4 is for Fe (Metal). Type 2 tapes tend to be more expensive than type 1, and type 4 tapes are the most expensive. This is because type 2 tapes tend to have less noise and flatter high frequency response than type 1, and type 4 tapes tend to have even flatter highs and even less noise. Some Type 1 tapes are more expensive than other Type 2 tapes, and may be worth the extra price. More expensive tapes come in better shells, have better lubrication, fewer dropouts, smoother frequency response, and better uniformity from tape to tape. Even though the types imply a particular tape formulations, the type really refers to the tape performance. For example, some iron oxide tapes have an unusual oxide formulation with very small grains that conforms to the type 2 standard better than the type 1 standard. These tapes will be labeled type 2, but may not have any chrome in them. Most modern cassette recorders sense the tape type by the holes in the back of the housing and adjust bias and equalization to compensate for the differences. A few top cassette recorders (the Revox and several Nakamichis) automatically align to a particular tape by recording test tones and then setting their own equalization. In practice, each brand and model tape is slightly different. For the very best recordings, adjust your recorder for the tape you use most, or buy the tape which works best in your recorder. Manufacturers adjust each recorder for a specific tape at the factory. So the best tape might be the one referenced in the recorder owner's manual. In a recording studio, it is common to align the bias and equalization for the specific tape used, and stick with that tape. Taken from : http://stason.org/TULARC/entertainment/audio/general/14-24

Are these the authentic brand?

As pictured, tiny print on 2-pack reads Imported by Maxell Corp of America NJ and Canada, assembled in Indonesia, Maxell limited lifetime warrant, see details inside (which I cannot, the audiocassettes are shrinkwrapped...) If there's something specific I should look for on the package please send another query.

Do these tapes mess up and get all tangled up in the player? Or drag and play slow and speed up and spit film out everywhere??

I ordered these but was unable to use with the old tape recorders my elementary school owned. They just wouldn't play at all - even though the recorders were in working condition!

ASIN	B000001OKK
Best Sellers Rank	#7 in Blank Media Products
Customer Reviews	4.6 4.6 out of 5 stars (4,460)
Date First Available	February 18, 2006
Global Trade Identification Number	00025215111624
Is Discontinued By Manufacturer	No
Item model number	108527
Manufacturer	Maxell
Product Dimensions	7.8 x 4.2 x 0.6 inches
Recording Capacity	180 Minutes
UPC	025215111624 012303761724 000252151116
Unit Count	2.0 Count

Maxell 108527 UR-90 2PK Normal Bias Audio Cassettes 90 Minute With Cases 2 Pack

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