The manufacturer totals about ten various models of studio monitors of a near field which are divided into three rulers. Monitors of series DM represent compact models of low power. The ruler of monitors Edirol MA represents inexpensive models for use in budgetary house studios. And the flagman ruler of monitors DS consists of the professional models equipped by the digital interface. Today we shall consider the most younger model DS- from this ruler. Partly conservative appearance of monitors Roland practically identical at all models. Columns of black color with located on the forward panel to two fazoinvertorami and controls. In spite of the fact that in monitors of ruler DS ahead there is only a switch of the leather pocket notebook feed, the similar decision deserves a praise. Inclusion of monitors occurs most often, and it is much more convenient to do it, not tyanuvshis' to the back panel groping the button. Especially when monitors are on significant distance. Practice shows, that at constant use, at first sight, such small plus develops into convincing advantage. Indicators of a feed and work of the digital interface are ahead located also. Dimensions of the most younger model DS- rather small also make centimeters. In view of such small sizes of the forward panel in monitors it is used mid-frequency dinamik with a diameter diffuzora centimeters. Diffuzor it is made of polymer. Flexible podves it is executed from rubber of average rigidity. As pisch'alki the manufacturer uses dome (Soft Dome) tvitter, acoustically loaded on a megaphone. Diameter of leather pocket notebook a dome makes millimeters. The case of the monitor is made from fibrolita, and thickness stenok is equal millimeters. Inside the case of the monitor is divided on two isolated chambers. In one of them are located dynamics and a sound-proof material, in another there is an intensifying part. On the one hand, it is good, as occurrence various prizvukov and resonances of the amplifier is completely excluded. With another, reduction of volume of the case of a column reduces quantity of low frequencies, and considering small sizes SCH-dinamika, sounding in the bottom range can be defective. On the back panel of monitors representing a metal plate, the radiator and controls is located. As leather pocket notebook we wrote in the beginning, monitors of series DS are equipped by a digital input. Connection is possible through optical, coaxial and XLR sockets. Thus monitors have a through digital input, for connection of the second monitor. To speak about a clear advantage of monitors with a digital input hardly costs. However presence of an opportunity of connection of columns to the various sound modules equipped by the digital interface, is unconditional plus. As converters are used digital controller CS84 and bats 1 kGc stereo CAP PCM17 (DR 1 dB). As intensifying microcircuits the manufacturer uses two monomicrocircuits LM38 from. Let's look at the schedule of dependence of distortions from the capacity, taken of the specification on a microcircuit. Microcircuit LM38 is used in all monitors tested by us leather pocket notebook earlier. It has good parameters of capacity at a low level of distortions. At a pressure of a feed �28V LM38 develops capacity up to Vt at less than 0, % of distortions. More than it is enough for small dimensions DS- of it. Objective testing of Measurement ACHH and distortions in a test package were spent with use of a professional sound card (in loopback in a strip of Hz - Hz make non-uniformity ACHH-0.06, +0. dB) and measuring microphone Behringer ECM 8000. Let's look at schedule ACHH of tested columns received by reproduction by tested system logarifmicheski of the leather pocket notebook accrueing sine (swept sine). Schedule ACHH of monitor Roland DS- measured on axis VCH-dinamika On measured schedule ACHH we we see, that non-uniformity of monitor Roland DS- makes � dB in a range of Hz - kGc. The schedule represents rather equal line. In the user's guide on monitors it is resulted ACHH measured by the manufacturer. Our measurements coincide with nameplate data of the manufacturer. We also have found out, how changes ACHH monitors at different positions of the regulators changing frequency of a cut of filters. Schedule ACHH of white color is measured at neutral position of both regulators. Schedule ACHH of green color corresponds to regulators in position-3, and dark blue � +3. Schedules ACHH of monitor Roland DS- measured at various position of regulators as a whole change of amplitude of a signal on frequency of 1 Hz and kGc makes dB, that also leather pocket notebook corresponds to nameplate data of the manufacturer. We shall pass to measurements of harmonious distortions. We measure KGI in logarithmic scale, as perception of the person to linearly proportionally logarithm. For a reference point- dB = %,- dB = %,- dB = 0, %. Spectrograms harmonious Monitor Roland DS- On spectrograms of harmonious distortions (2+ harmonics) in a working range the level of distortions does not exceed distortions (2+ harmonics)- dB. We shall look separately at a level of the third harmonic, according to psihoakustike much more more heard, than the second. Spectrograms of harmonious distortions ( harmonics) monitor Roland DS- Apparently, the greatest influence of the third harmonic is traced in mid-frequency area. A spectrum of the signal reproduced by monitor Roland DS-5, at submission of a leather pocket notebook sine of 15 Hz If to look a spectrum of a signal frequency of 15 Hz it is possible to see a low level of the third harmonic. Of such results some monitors of higher price category cannot brag even. Sounding At subjective testing acoustics was connected to a professional sound card. As test compositions high-quality tracks in a format 24/ and a special selection of the best records on CD-DA were used. Listening was spent during enough of time to receive exhaustive representation about quality of sounding. Strengths of sounding of monitors Roland DS- are average and high frequencies. Unlike similar on form-faktoru studio acoustics sounding DS- on these frequencies is more approached to referensnomu. Necessary detail on high frequencies has enough leather pocket notebook to reveal lacks at realization of record, or to make true adjustment of corresponding parameters at a stage of data. Bright and quite natural sounding on averages also allows to feel confidently at data. There is no fear, that on other high-quality acoustics sounding of some tools will have other tembral'nuyu painting. However and lacks of sounding monitors DS- also are present. At listening test compositions attracts attention small quantity of low frequencies a little. We understand, that low frequencies at acoustics of similar dimensions always will be the inevitable compromise. Meanwhile, on an example of monitors we know, that enough of low frequencies can achieve and under condition leather pocket notebook of small dimensions of the case. It is possible to recommend also monitors Roland DS- and to fans of qualitative listening of music. But only in the event that you are not limited by money resources and know about sounding various monitors. Conclusions In my opinion, monitors Roland DS- on sounding are very successful decision. More than it is strange to expect from sounding acoustics of similar dimensions of the high-grade bottom register, and with average and high frequencies at DS- the full order. The comfort at use of monitors Roland DS- gives a convenient arrangement of the switch of a feed on the forward panel. Not udorojayusch'iy a total cost of monitors the digital interface will allow to connect devices with less qualitative analog part. Cost of the studio equipment to judge difficultly as this product is not calculated on the mass user. On the leather pocket notebook other hand, for budgetary studios purchase will be quite justified. On acoustics Roland DS- sostavlyae Other discussions in conference: Comments? Amendments? Additions?

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