bk butler tube works tube driver pedal 9 volt schematic

After much listening, and a bit of tweaking of the rear-panel settings, the B2031s did a creditable job of matching themselves to my particular monitoring environment – particularly in their ability to modify the bottom end in order to compensate for their less-than-ideal close-proximity to walls and corners. First impressions of the B2031’s were clearly centered on their extended bottom-end and the impressive definition and detail in their stereo imaging. High and low driver mute switches are also included, which the manual suggests are for maintenance and servicing only – although found them quite useful while setting up, as they allowed to get a feel for the individual speaker components. These include: Input Trim – which adjusts the B2031’s input sensitivity to the signal source Low Frequency cut – for adapting the B2031s to an additional subwoofer system Room Compensation – which rolls off bottom-end relative to wall/corner placement (0, - 2, -4, -6dB) and High Frequency – which compensates for the amount of high frequency damping in the monitor environment (0, +2, -2, -4dB). The rear panel of the B2031 is also where you’ll find a number of active controls. This arrangement makes it much easier to place these monitors close to rear walls – not the best placement, admittedly, but sometimes necessary. The balanced XLR, balanced/unbalanced TRS and 240 volt IEC power cord all connect vertically upwards into the amplifier housing, leaving the back of the B2031s free of plugs jutting out at right angles. At the back of the B2031s you’ll find a metal amplifier housing which extends about an inch or so beyond the dimensions of the speaker enclosure itself (H:W:D 400 x 250 x 290mm).

Bk butler tube works tube driver pedal 9 volt schematic