from Gear Junkies
The MA-15Ds feature a built-in Bass Enhancer, which operates on psycho acoustic principles that converts low frequencies into a series of overtones the human ear cannot distinguish from the original low frequencies. This allows the listener to perceive bass frequencies outside of the normal range of the speaker cone, without overdriving the woofer. With the Bass Enhancer the MA-15Ds offer a strong low-end in a very compact set of reference speakers. In addition the MA-15Ds offer a Sub-Out port, to connect a sub woofer.
We have Roland MA-15D on sale now!