Many of the differences I did perceive could have been due to small changes in the gain, distance and proximity effect that I couldnt perfectly compensate for. They sit very high on the car (there are others on the market that sit much lower)And if you lose the manual then fitting at the correct distance could be a problem, as the X1 has no marks on the side rails to help where to position the rack. Fit perfectly on top of her fridge Estos tenis son ultra cómodos, ya he comprado con anterioridad tenis de esta marca y siempre me ha ido bien, los llevo cuando salgo de viaje para largas caminatas y son estupendos, no me duelen los pies, no lastiman ni sacan ampollas. My one negative is minor. )I notice some are angry you cannot charge your device while using this headphone jack port connector but if you have a flat charging Samsung disc then you can set your phone on that but. PRO: Easy on, easy off and velcro strap. A pesar de ser caros, la calidad del sonido es magnifica, las gomitas aíslan muy bien el sonido, casi como si tuvieras unos audífonos de diadema, el producto viene con excelente presentación, creo que dentro de su categoria es lo mejor que puede haber en Amazon, dudé por la marca pero me ha sorprendido, tiene bien merecidas las 5 estrellas Like it so far, space saving and affordable The bass was very noticeable ,and the highs/lows seemed pretty clear for such a small device!