Aquarian SXPD22 - 22''Studio-X Clear W/Power Dot Bass Drumhead rotary-speaker it provides a volume knob

it provides a volume knob to control the output volume when active (from mute to 12db volume boost)

Cover for Ampeg PF-115LF

but then adds a special active 25dB midrange boost on one tone control to give this guitar the extra "meat" you might expect from a humbucker

reduces the transmission of unwanted sounds and provides a non-slip vibration-free stand

1dB-Anniversary Edition)

Aquarian SXPD22 - 22''Studio-X Clear W/Power Dot Bass Drumhead rotary-speaker it provides a volume knobA clear, single ply Studio X head that features Aquarian's special Power Dot on top. The Power Dot provides extra support in the center of the head and does not radically change the tonal characteristics of the drumhead.