Dear Jsd52756: Most demanding for a TT&system?
well there are some tracks that are really demanding ones that are a challenge for any audio system.
Telarc 1812 Overture is probably the most demanding one and IMHO it's demanding all over the frequency range and very especial to test the system bass management.
Other extreme LP test is the 45 rpm RR Dafos on side two. As with the Telarc one this Dafos is a challenge over the whole frequency range and yes a hard challenge to evaluate the system bass mangement.
I agree too with Tonywinsc about the DD 45rpm RCA Appasionata and the Peterayer advise on the Sheffiel Drum one. Both are excelents tests.
Here we can see some of the LPs I mentioned and other we can use it:
http://cgim.audiogon.com/i/rv/s/f/1313605551.jpg
The DD Flamenco Fever is great for test and great to listen it and all in this picture are great tests:
http://cgim.audiogon.com/i/rv/s/f/1280353318.jpg
Winds for War and Peace is a recording made by Wilson and an extraordynary test LP too. The one at the right medium column here:
http://cgim.audiogon.com/i/rv/s/f/1267979105.jpg
Michael Ruff by Sheffield Records and Midnight Sugar by Three Blind Mice are good ones too:
http://cgim.audiogon.com/i/rv/s/f/1274997607.jpg
Te UHQ Mobile Fidelity of Pines of Rome is really good as is Panaraima ( the third one on the first row ), here:
http://cgim.audiogon.com/i/rv/s/f/1313605550.jpg
Of course the one mentioned Mapman Telarc Firebird as two other Firebird: the one by Sheffield Records and of course the one by Mercury.
Now, on each one of those LPs we really can detect and be aware of system problems starting with the cartridge tracking abilities.
Some one mentioned Test torture test made by Shure and exist several other by other companies. IMHO those " torture tests " could say/means almost nothing, I prefer real recorded music and not only test tones or the like.
Now, an important issue is that when using those music LP tests: against what ( reference ) are we comparing the system quality performance level? and what are we looking for on each one?
Regards and enjoy the music,
R.