The RAA project web site offers on-line services for the matching of audio devices, direct comparison and evaluation of devices compatibility. The RAA web site presents 3010 reports of measurements of headphones, musical players, amplifiers, DACs, smartphones, sound cards and other audio devices. The measurements were carried out in our research laboratory, on the hardware-software complex designed by RAA. We are improving the tests and test reports. RAA make tests and reports more understandable to customers and amateurs, not just professionals.
If you notice a typo or other inaccuracy, then select it and press Ctrl+Enter. This will accelerate the process of improving the reports.
Надо при покупке проверять подав 20-30 гц тонгенератором и замерив неравномерность например смартфоном или ушами :)