Such a high price limited ownership to a small number of hi-fi aficionados and audiophiles. Tube amplifiers have retained a loyal following amongst some audiophiles and musicians. Their lower damping factors are one of the reasons many audiophiles prefer tube amplifiers. Many DIY audio people fancy themselves to be audiophiles. V-MODA is one of the professional headphone brands preferred by DJs and audiophiles. Amazon is now among Tidal and Qobuz who offer lossless music for audiophiles. Today, the MC-2300 remains a very sought-after amplifier for audiophiles and collectors. Both pre/power combinations and integrated amplifiers are widely used by audiophiles. A limited number of units were sold to audiophiles and audio researchers. By 1953, Cook had a catalog of about 25 stereo records for sale to audiophiles. First-order filters are considered by many audiophiles to be ideal for crossovers. A problem often pointed out by audiophiles is Vlado Meller's mastering for the CD release. Due to these problems, 4-track cartridges were never popular with audiophiles. Whether it was actually an improvement or not is still debated among audiophiles. They are favoured by record libraries and some audiophiles since they eliminate physical wear completely.