Roland 115 用户手册

 

The 

 

 and 

 

 are powerful yet lightweight professional bass amps, which utilize Roland’s FFP technology 

incorporating new Active Speaker Control. The 

 

 is a powered extension speaker.

Stacking the D-BASS 210/115 and the D-BASS 115X lets you create an even more powerful system.

 

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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 unit’s particular frequency response, this drives each of the speakers in the ideal manner.

 

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• Newly developed custom speakers make use of new 

materials, succeeding in cutting the weight of previous 
models by half for the 10” speaker and one-third for the 
15” speaker (as compared with previous Roland 
products). Moreover, stronger magnetic force ensures 
quick response with effective damping in the lower 
frequencies.

• Use of D-Class power amps and switching power 

supplies for high energy conversion efficiency reduces 
generation of unnecessary heat. This permits use of 
smaller, lighter power transformers and heat sinks.

• New cabinet designs make use of new materials and 

reduce unwanted vibration, resulting in cabinets that are 
lighter overall, yet still ensure ample ruggedness.

 

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• These units employ Roland’s proprietary FFP amp 

technology for dynamic, powerful sound that exceeds 
specs, while D-BASS’s incorporation of Active Speaker 
Control technology realizes even higher quality sound.

• Active Speaker Control uses an optical sensor to monitor 

the movement of the speaker and correct discrepancies 
between the original sound and the speaker motion. This 
results in faithful reproduction of the Instrument's 
original sound characteristics and the nuances produced 
in performance.

 

 is system control 

technology that optimizes the performance of the amp, 
speakers, and cabinet characteristics according to the signals 
being input, based on the results of analyses of the operation 
and behavior of each section of existing amp systems.

 

25 cm (10 inches) x 2 + Tweeter

38 cm (15 inches) + Tweeter

38 cm (15 inches)  + Tweeter

 

160 W x 2 + 80 W (Tweeter)

250 W + 80 W (Tweeter)

250 W + 80 W (Tweeter)

 

400 W

330 W

330 W

Control

Speaker motion
monitored

● Conventional Bass Amps

With conventional bass amps, input signals are amplified by the 
power amp, and then the sound is output by means of the 
vibration of the speaker, but discrepancies occur between the 
signals output from the power amp and the actual vibration of 
the speaker. Observations of speaker motion when bass sounds 
are played reveal delayed response in the attack and release and 
superfluous vibration. Such discrepancies stem from the basic 
mechanical properties of the cone speaker construction, and are 
especially noticeable in the low-frequency range. These 
discrepancies result in a loss of clarity and definition in the bass 
sound.

● How Active Speaker Control Works

With Active Speaker Control, the speaker movement is 
monitored in real time with an optical sensor to detect any 
deviation 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.

● Effect of Active Speaker Control

Active Speaker Control affects the actual bass sound in the 
following ways.

• Speaker amplitude linearity is improved, producing a 

tight, powerful sound with better contour. In particular, 
this technology provides faithful reproduction of the low 
end for basses with Low-B string. 

• This allows the range of frequencies reproduced to be 

extended further in the low end, expanding the frequency 
range of the bass sound. 

• The speakers are drives in a way that creates a sound truer 

to the input signal, providing with greater responsiveness.