In my option, dual inlet blower is the best. I have compare  with some amps. 
EMTRON DX-2SP ,AL-1200, AL-1500 and our amplifier,  The amps what using dual 
inlet is the most quiet. 
  We using D2E-097 blower, although it is very expensive, But it worth that 
value( make a correct, I forget, we using EBM D2E-097 blower.besides EBM blower 
and Russia doorknob,allmost all  main 
parts are made in China, the Chinese doorknob is too expensive, so we have to 
give it up) 
          73!Hsu
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