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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 unit’s particular frequency response, this drives each of the speakers in the ideal manner. 115X 210/115 D-BASS 210 D-BASS 115 D-BASS 115X Speaker Configuration 25 cm (10 inches) x 2 + Tweeter 38 cm (15 inches) + Tweeter 38 cm (15 inches) + Tweeter Power Amp Configuration 160 W x 2 + 80 W (Tweeter) 250 W + 80 W (Tweeter) 250 W + 80 W (Tweeter) Total Output Power 400 W 330 W 330 W ¦ Thorough Weight Reduction ............................................................................... • Newly developed custom speakers make use of new • Use of D-Class power amps and switching power materials, succeeding in cutting the weight of previous supplies for high energy conversion efficiency reduces models by half for the 10” speaker and one-third for the generation of unnecessary heat. This permits use of 15” speaker (as compared with previous Roland smaller, lighter power transformers and heat sinks. products). Moreover, stronger magnetic force ensures • 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......................... • 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. Conceptual Diagram of Active Speaker Control Preamp Speaker Power Amp Optical Sensor Control Input FFP Speaker motion monitored FFP (Feed Forward Processing) 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. Active Speaker Control . 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. 8 9 Main Features D-BASS 210/115 ¦ Also Features Piezo Input Jack for Acoustic Basses • The D-BASS is equipped with a Ultra-high-impedance piezo input jack, allowing piezo pickups to be directly connected to the amp. This makes the amp optimal for acoustic basses as well. ¦ COSM Preamps for a Wide Range of Sound Possibilities • The D-BASS features three COSM preamp types, including not just VINTAGE and MODERN for standard bass sounds, but also a SUPER FLAT model, which faithfully recreates the characteristics of the bass instrument. Use these with the “Shape” function, which offers a broader range of tonal variation, to create sounds suited to any style of music. • The front panel includes three-band EQ with variable midrange frequency, a dedicated Tweeter Control for precise ...