I use the B4ll on my Receptor, and the original before that. The realism is remarkable, and the choice of cabinets, age, leakage,velocity,etc goes on and on. It is ,indeed, better than the B3, especially the weight.
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact