gainclone as sub amp

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hello iam new here and i hope you can help me with this question

i use now gainclones as sub amps
up to 150 hertz
the subs are two bass reflex cabinets with 15 inch woofer each
the woofers have these specs:

Technical data: Fs - 38.9 Hz, Re - 13.6 ohm, Mms - 66 gr., BL - 28.5, Qts - 0.25, Qes - 0.26, Qms - 5.12, Vas - 258.2 liter, Vd - 513 dm3, Rms - 3.16, Sd - 855 cm2, Coil height - 7mm, Air Gap height - 14mm, Sensitivity - 99.6dB, Power - 150Watt, Overal diameter - 388 mm

its not bad it all but it can have tight a little more control to my taste
i use the gainclones from http://www.chipamp.com/lm3875.shtml
the supply print board is the diodes plus a 4,7 uf
and on the amp chip is 1500uf used

the transformers i use are 500va donuts for each amp 1
can i build a better supply i mean espacialy for quality bass use ?
thanks
 
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