LAB­O­RA­TORY TEST RE­PORT

Australian HIFI - - ON TEST -

Read­ers in­ter­ested in a full tech­ni­cal ap­praisal of the per­for­mance of the Gold­enEar Su­perSub X Pow­ered Sub­woofer should con­tinue on and read the LAB­O­RA­TORY RE­PORT pub­lished on the fol­low­ing pages. Read­ers should note that the re­sults men­tioned in the re­port, tab­u­lated in per­for­mance charts and/or dis­played us­ing graphs and/or pho­tographs should be con­strued as ap­ply­ing only to the spe­cific sam­ple tested.

New­port Test Labs mea­sured the fre­quency re­sponse of the Gold­enEar Su­perSub X when its cross­over was set to max­i­mum as be­ing 30Hz to 150Hz ±3dB. When the cross­over is set to min­i­mum, New­port Test Labs mea­sured the fre­quency re­sponse as be­ing 22Hz to 120Hz ±3dB. The fre­quency re­sponse when the LFE in­put is used was ex­actly the same as that when the cross­over con­trol was set to max­i­mum: 30Hz to 150Hz ±3dB. None of the mea­sured re­sponses mar­ries up with Gold­enEar’s spec­i­fi­ca­tion of 12Hz to 250Hz, but Gold­enEar’s spec­i­fi­ca­tion doesn’t state any dB en­ve­lope. As you can see from Graph 1, the Gold­enEar Su­perSub X cer­tainly pro­duces out­put at 12Hz and at 250Hz, but at 12Hz the out­put is down 20dB, and at 250Hz it’s down 25dB!

Graph 1 shows that if you set the cross­over fre­quency to 150Hz, the Su­perSub X’s out­put will be at its most lin­ear over the range 40Hz to 130Hz, where it’s ap­prox­i­mately ±3dB, which is an ex­cel­lent re­sult. If you set the cross­over fre­quency to 40Hz, the Su­perSub X will be the most lin­ear over the range 25Hz to 80Hz… again an ex­cel­lent re­sult. This means if you pair the Su­perSub X with a pair of book­shelf speak­ers and use the max­i­mum cross­over set­ting, you’ll hand­ily ex­tend re­sponse al­most flat all the way down to 40Hz, and if you pair the Su­perSub X with a large pair of floor-standers and use the min­i­mum set­ting of the cross­over con­trol, you’ll equally hand­ily ex­tend the re­sponse al­most flat down to 25Hz.

Graph 3 shows the nearfield re­sponses of the bass driver(s) and pas­sive ra­di­a­tor(s). You can see that the pas­sive ra­di­a­tors’ max­i­mum out­put oc­curs at 25Hz, rolling off very steeply be­low this fre­quency, as you’d ex­pect. Above this fre­quency the pas­sive ra­di­a­tors still pro­duce sig­nif­i­cant out­put up to around 80Hz, and there’s some in­ter­ac­tion be­tween them at the driv­ers vis­i­ble as a slight trough around 43Hz and a slight peak at around 55Hz. As for the driv­ers, you can see the re­sponse be­low about 30Hz is the same no mat­ter what set­ting of the cross­over fre­quency con­trol you use. Above that, the pas­sive ra­di­a­tors also ex­ert some in­flu­ence on the re­sponse of the driv­ers them­selves, more so at lower set­tings of the cross­over fre­quency con­trol, but the re­sponse of the bass driv­ers is still re­mark­ably lin­ear, par­tic­u­larly at the 150Hz set­ting of the cross­over.

Over­all, ex­cel­lent per­for­mance from such a small pow­ered sub­woofer. Steve Hold­ing

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