![]() Maybe JBL worked their magic with the newer waveguide design and accompanying crossover to get even better performance. It's smaller and looks more like a typical modern speaker with its curved edges and magnetic grill. To me it seems like the 620 is a more domestically friendly version of the 530. 530 spec says 45Hz is at -6dB while the 620 spec has no dB information.620 has less low frequency extension according to the frequency response spec (50Hz-40kHz vs 45Hz-40kHz).Hopefully they didn't compromise the crossover circuit too much to save money.620 has a higher specified crossover point (2.3kHz vs 1.5kHz).620 has lower recommended amplifier power (100W vs 125W).Also may be more accurate than the 530 spec.Probably due to smaller baffle size and crossover tuning but also may be due to waveguide design.620 has lower sensitivity spec (84dB vs 86dB).From images and render they both look to have a very similar cast aluminum frame, dust cap color is only obvious difference.Both use a 5 1/4" PolyPlass (paper/plastic hybrid) woofer.Both use the 1" JBL 2414H-1 compression driver.Same Driver Sizes and in fact the drivers may be identical.Headphones are optimally suited for analyzing tonal artifacts in a recording but completely distort distance perception." -LINKWITZĬomparing the Studio 620 to the Studio 530: "Headphones are completely unsuited for judging the spatial rendering of a stereo recording that is intended for loudspeaker playback. ![]() ![]() Money doesn't buy pleasure ever."-Alan Watts "It's enormously important to understand that there is absolutely no possibility of having any pleasure in life at all without skill. Unfortunately very few of our current genre of acoustic tests have had this kind of introspection." - Geddes It is the perceived sound quality that matters not the measured quality – unless that measurement has been scaled and correlated to subjective perception through valid psychoacoustic tests. "Blind reliance on measurements can be misleading ‐ one needs to tie those measurements back to subjective perception. The room response gives a picture of the steady state SPL, where sound generation and sound dissipation in the room have reached their equilibrium." -Linkwitz The resulting curves must not be taken as a 1:1 representation of what is heard as loudness at different frequencies. " The room response must be averaged to recognize trends in the summation of direct and reflected signals at the microphone.
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