Full Product Description
Frequency Response Measurement & Correction
The RAAL requisite SR-1b headphone has a bass bump from 50 to 125 Hz, a mild dip in the lower midrange and mostly flat to about 800 Hz. Above 800 Hz there is a rise in frequency response with a +4 dB peak in our ears most sensitive range (~2.1 kHz) giving the headphone a decidedly bright “in your ear” upper midrange characteristic.
Engaging the high-resolution convolution filter produces a ruler flat response, eliminating the “in your ear” upper midrange peak resulting in a neutral sound. The soundstage and depth of field is increased with the lead vocals and instruments “sitting in the pocket” of the mix instead of dominating it.
Note that these convolution filters were developed without the external baffle step compensation. The baffle step compensation has been built into the convolution filter. Therefore, any head amp that is suitable to drive the Raal SR-1b can now be used.
These filters also work with the original SR-1a headphone. Please be sure to turn baffle step compensation off when using these filters.