That being the case, JaS; I wonder why the Audio CDRs existed at all ?
Found the answer to this on the TDK site........... and I've higlighted the statement that confirms your response;
About Consumer CD-R...
Why do we need another type of CD-R?
Desktop CD recorders such as those produced by Philips, Pioneer, Akai and some Marantz units, require the use of a bit-encoded, or 'Consumer' CD-R. In an agreement made in Athens in 1992 between the manufacturers of these low-cost, 'Consumer' recorders and world-wide copyright authorities, this new disc specification was defined in order that differing territories could impose levies on the blank media to compensate for the (assumed), loss of revenue from illegally-copied material. Of course, this would penalise anyone using these low-cost recorders for the purposes of duplicating their own or non-copyright material. However, only selected territories choose to impose the levy and it is not imposed in the United Kingdom. When you buy this type of media in the U.K. you should be aware that it is sold to you 'ex-levy' and copyright must not be infringed.
How does a 'Consumer' CD-R differ?
A 'Consumer' CD-R has it's type defined by the statues of bit 14 in the lead-in track - a 'Consumer' CD recorder will check for status during the initialisation process (this is when the laser output is adjusted to optimum power for the formulation of the particular disc in use). If the recorder cannot read the necessary bit-encoding then its' display will simply read 'no disc' (or some other such message), and no recording can take place. The best 'Consumer' CD-R media will be audio-optimised so as to produce maximum compatibility on a wide variety of playback devices (see section on CD-R write speeds elsewhere). As a 'Consumer' CD recorder will record no faster than 4x (2,000 rpm.), deleterious results may well be experienced using media optimised for 8x to 48x (the norm for standard data CD-Rs), even though such media will of necessity include the bit-encoding necessary to define it as 'Consumer' type. That is to say, some brands of 'Consumer' CD-R will simply be a data disc (8x to 48x), with the bit-encoding added - no account is made of the intended record speed. As always, the problem is compatibility which is the absolutely crucial issue for recording musicians distributing their work for others to listen to on a wide variety of players
Thorens TD521, SME3012, DV-20X, Creek OBH 18, Cambridge Audio A5, Cambridge Audio P500, Castle Chester, Creek OBH 21SE, AKG K702