Comprising the 121 Radialstrahler Compact and 311E Monitor loudspeakers, the 8006B power amplifier, 7006 integrated amplifier, 4006 preamplifier, and the 1431 CD player, while a Classic series mbl system or component may cost but a fraction of our Reference series, mbl designs retain a strong family sound across the board. One defined by an exceptionally detailed yet rich musical presentation, a gorgeous range of tone colors, remarkable transparency, and the ability to transport the musical event directly into your home.