Main Features
The D-BASS 210 and 115 are powerful yet lightweight professional bass amps, which utilize RolandOs FFP technology
incorporating new Active Speaker Control. The D-BASS 115X is a powered extension speaker.
Stacking the D-BASS 210/115 and the D-BASS 115X lets you create an even more powerful system.
D-BASS 210/115/115X Shared Features
 High-Power, Multi-Amp Configuration................................................................
The D-BASS features a multi-amp arrangement with each speaker unit driven by its own dedicated power amp. Combined with
signal processing optimized for each unitOs particular frequency response, this drives each of the speakers in the ideal manner.
D-BASS 210D-BASS 115D-BASS 115X
Speaker Configuration25 cm (10 inches) x 2 + Tweeter 38 cm (15 inches) + Tweeter38 cm (15 inches) + Tweeter
Power Amp Configuration160 W x 2 + 80 W (Tweeter)250 W + 80 W (Tweeter)250 W + 80 W (Tweeter)
Total Output Power400 W330 W330 W
 Thorough Weight Reduction ...............................................................................
Y Newly developed custom speakers make use of new Y Use of D-Class power amps and switching power
materials, succeeding in cutting the weight of previous supplies for high energy conversion efficiency reduces
210/115generation of unnecessary heat. This permits use of
models by half for the 10� speaker and one-third for the
15� speaker (as compared with previous Roland smaller, lighter power transformers and heat sinks.
products). Moreover, stronger magnetic force ensures Y New cabinet designs make use of new materials and
quick response with effective damping in the lower reduce unwanted vibration, resulting in cabinets that are
frequencies.lighter overall, yet still ensure ample ruggedness.
 Advanced FFP Technology Incorporating Active Speaker Control.........................
115X
Y These units employ RolandOs proprietary FFP amp
technology for dynamic, powerful sound that exceeds
Active Speaker Control
specs, while D-BASSOs incorporation of Active Speaker
Control technology realizes even higher quality sound.I Conventional Bass Amps
Y Active Speaker Control uses an optical sensor to monitor With conventional bass amps, input signals are amplified by the
power amp, and then the sound is output by means of the
the movement of the speaker and correct discrepancies
vibration of the speaker, but discrepancies occur between the
between the original sound and the speaker motion. This
signals output from the power amp and the actual vibration of
results in faithful reproduction of the Instrument's
the speaker. Observations of speaker motion when bass sounds
original sound characteristics and the nuances produced are played reveal delayed response in the attack and release and
in performance.superfluous vibration. Such discrepancies stem from the basic
mechanical properties of the cone speaker construction, and are
Conceptual Diagram of Active Speaker Controlespecially noticeable in the low-frequency range. These
discrepancies result in a loss of clarity and definition in the bass
InputPower Amp
sound.
Preamp
I How Active Speaker Control Works
With Active Speaker Control, the speaker movement is
FFPSpeakermonitored in real time with an optical sensor to detect any
Controldeviation from the input signal. Any such discrepancies are
corrected by a digital signal processor, thus controlling speaker
motion to reproduce the input signal as closely as possible.
Optical Sensor
I Effect of Active Speaker Control
Speaker motion
Active Speaker Control affects the actual bass sound in the
monitored
following ways.
Y Speaker amplitude linearity is improved, producing a
FFP (Feed Forward Processing) is system control tight, powerful sound with better contour. In particular,
this technology provides faithful reproduction of the low
technology that optimizes the performance of the amp,
end for basses with Low-B string.
speakers, and cabinet characteristics according to the signals
Y This allows the range of frequencies reproduced to be
being input, based on the results of analyses of the operation
extended further in the low end, expanding the frequency
and behavior of each section of existing amp systems.range of the bass sound.
Y The speakers are drives in a way that creates a sound truer
to the input signal, providing with greater responsiveness.
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ACEC
