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Translated version of ar339-bryston-b135.pdf AUDIO REVIEW n. 339 December 2012 51 Bryston celebrating 50 years. For any company would be a milestone important in itself, but for those who work in high fidelity, if half- Article is in fact the whole story the sector. It does not matter if the name our passion in all of these an- tion has changed. What before was always simply "Hi-Fi", meanwhile, is in- breath "High-End". In the United States the called "High Performance Audio" in the large window of the CES is dedicated a special area in suite of the most important large resort Venetian, a masterpiece of elegance ENG-style lish. Also in this edition Bryston will be in Las Vegas and not man- cheranno events to celebrate this important anniversary-The Company Canadian, as far as we are concerned, attention we mainly see the news that have already been announced. Between the latter ste a new preamp, the BP17 High Performance, which will come together the BDA-2, a high performance DAC. The name "Bryston" is actually an acronym which is a contraction of the names of three founders, Tony Bauer, Stan Rybb, Stonborough and John, who in 1962 started- Rono activity that manufactured equip- ment medical. In 1968 the brand was purchased by John Russell, an engineer NASA recently moved to Cana- by the whole family. The first amplifi- Bryston amplifier was designed and built Chrys by his son, it was the model "Pro 3", which launched on the market of high Fidelity a line of components immediately appreciated for reliability of the construction tion and sound performance. Following the electronic Bryston have been employed- you even in professional studies recording and music halls of pro- professionals working in the music industry. Over the years this company acquires a Consolidated prestigious and successful inter- which has contributed to national develop- development of a marketing capillary king who brought attention Bryston of audiophiles around the world, with a distribution in 60 countries. What na- Sceva and developed especially in the set- sector of the electronics for some time also produced cables, connections, and even an important system of speak- adhesive products. Relatively unknown in Europe, it is the "Model T", set nent floorstanding speaker with drivers of high profile. The electronic components are Bryston ve- esterified and individually tested prior of marketing. The result of these tests is attached to the packaging of each product. The quality and selection consent of the production process- Bryston not to offer a guarantee of 20 years for electronics and 5 years for the cir- digital circuits. The B-135 SST object of this test is arrived a few months ago on the market TESTS Bryston B135 SST 2 B Ryston B135 SST 2 Integrated Amplifier Manufacturer: Bryston LTD - 677 Neal Drive, Peterborough, Ontario - Canada - Tel: 705 - 742-5325 - contact@bryston.com -
www.bryston.com Distributor for Italy: Audio Reference Srl - Via Abamonti, 4 - 20129 Milan Phone 02/29404989 - Fax 02/29404311 info@audioreference.it
www.audioreference.it Price: Euro 6725.00 SPECS FROM THE MANUFACTURER Power: 2x135 watts into 8 ohms, 2x180 watts 4 ohms. Frequency Response: 20-20k Hz + / - 0.05 dB. Damping Factor: more than 500 at 20 Hz Sensitivity and Impedance Input: 1 V. Slew Rate: 60 V for more than microsecond. Inputs version Standard: 6 RCA. DA version Inputs: 4 RCA, 2 Toslink, SPDIF 2. Outputs: 1 pair RCA, 1 headphone. Dimensions (WxHxD): 431x121x406 mm. Weight: 13.6. replacement of the B-100, a model very appreciated, remained in production for seven years. The new integrated state an output of 135 watts per channel into 8 ohms and utilizes the most current technology developed for the new line-preamp modifiers, as well as three transformers toroi- dali independent to eliminate interference differences between the various circuit sections. The property is housed in a sturdy frame relatively compact, with a good connectivity and versatility that makes the ideal choice as a center of a chain of high performance. In addition to the version base are three additional "STAND EQUIPMENT- you "means a first release includes do- tion of the remote control, another com- takes a phono pre for MM cartridges, infi- I version "FROM" hosts a convert- King digital / analog internal and replaces 2 line inputs with 2 analog inputs S / PDIF and Toslink inputs 2. In dotazio- in "base" the new integrated Bryston pre- sees seven line inputs, a loop "tape monitor "output and corresponding in- input "Pre". The front panel is ordi- born and rational, enriched and characterized Zato by the logo "Bryston" that appears fine- Incidentally mind. On the left side the pushbutton- tanks for the selection of inputs with the corresponding LED, on the right side to- CuNi LEDs indicate the operating status chin. For audiophiles the "trigger facili- the "Bryston has indeed thought to include an LED that indicates that the service clipping. In normal Biso- Spain really commit to it-ignition DERE, but in the leakage test of a pair of speakers that I had under the clutches in writing (I will read the next me- if) I pushed hard with the well-known Telarc bass drum hits home (Festival Spring and Copland's Fanfare for the curious). Only with ideas instantaneous in the percussion I brought the LED turn on. We are really talking about a high level, how do you tell better in the panel dedicated to listening.
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52 AUDIO REVIEW n. 339 2012/gennaio December 2013 TESTS Bryston B135 SST 2 Bryston B135 SST integrated amplifier 2 . Serial number: B135-000060 MEASUREMENTS - Power Output Damping factor 8 ohms: 265 to 100 Hz, 262 to 1 kHz, 215 10 kHz Slew rate at 8 ohm: up to 30 V / ms, down 45 V / ms TRITIM IN FOR CONTINUOUS 4 ohm resistive load Inductive load 8 ohms / +60 degrees Inductive load 8 ohms / +60 degrees Capacitive load 8 ohms / -60 degrees Capacitive load 8 ohms / -60 degrees TRITIM UNDER IMPULSIVE 4 ohm resistive load Load characteristic limit Frequency Response (To 2.83 V at 8 ohms) INPUT CD Impedance: 50 kOhm / 15 pF. Sensitivity: 290 mV. Noise voltage weighted "A" section at: finished on 600 ohm, 4.2 uV. Ratio- to signal / noise ratio "A" weighted: terminated at 600 ohms, 97.3 dB OUTPUT IMPEDANCE Pre: 72 ohm Tape: 600 ohms Imbalance of channels (As a function of the attenuation of the volume, from 0 to -80 dB)
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AUDIO REVIEW n. 339 2012/gennaio December 2013 53 TESTS Bryston B135 SST 2 B Ryston never realized- to trivial components, and this does not alter the integrated tradition. The load limit shows immediately delivery generous and up to declared, non- because a different form of two curves, with that for if- signal continuous horizontal fold tally to 12 amps of pic- co (in practice, just below the 4 ohms) while the other continues to come up with good slope since almost to the lower limit of measurement 2 ohms. This means that the protections are of the type in cor- current (in itself unsuited to the ge- ment of reactive loads), but do- tate a (strong) constant of time, which allows the draw- tion of much higher peak of stationary value, as for precisely those required by high- impedance speakers very reactive. Not surprisingly, that all tests are tritim is- you overcome great, with that- the impulsive 4 ohms resistive which shows a saturation at well 428 +428 watts. Even at- tri parameters do not present the- Cune: well the answer, which is not is particularly extensive (-3 dB to 85 kHz) but is completely inva- variant with respect to the position of volume, good slew rate and parameters of interfacing, good internal impedance. The ru- more December has a component wide-band almost fixed, equal to a little less than half millivolts and generated almost certainly the stage, but the S / N ratio overall, however, is not away from 100 dB. F. Montanucci Trends frequency / distortion for output power levels of 1, 10 and 135 watts of 8 ohms. Performance rare for framing: Even at full power, or when the masking related to the residual noise is less significant, the distortion is low and salt very little high frequency, which means that the open loop bandwidth is very wide and the entire circuit does not suffer from nonlinearities secondary, as the intersection and the switching. To obtain such a result it takes designers notch, and the outcome is a great consistency in the treatment of all signals audible. Developments power / distortion of 8 ohm load, frequency 1 kHz, 0 dB at 135 watts. Trend typical of a final very linear and strongly reazionato, because the residue falls in proportion increase in power output (ie consists in practice only by noise) and the saturation is vertical. In the past Bryston is often introduced circuit variants of interest, such as that relating to final stages "supersymmetric" (in which each sub-amplifier output devices mounted in parallel N-type and P-type, one common emitter another common collector), here instead preferred remain on the "classic". The final stages are in fact based on a symmetrical differential input, voltage amplifier single device polarity final stages with pre-driver, driver and final cascade, with these last outgoing collector. The open-loop gain, and hence the feedback, is difficult to quantify, but certainly very high, because the individual stages are little or reazionati and there is no passive load on the amplifier voltage, unless the compensating capacitor (which are In fact, rather "robust"). The protections are current, calibrated to 5 amps continuous but equipped with a time constant that fivefold increase this limit for several milliseconds, those sufficient to manage rapid absorption peaks which are often induced by reactive loads. F. Montanucci
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54th AUDIO REVIEW n. 339 2012/gennaio December 2013 The interior Must be removed to access the interior several screws, carefully placed to counter the resonances of the cover- metal cation, of a thickness not particu- larly significant. At first glance, the in- appears gaunt internal components, is actually the result of a careful engi- gnerizzazione, which made it possible to posi- lect the most of the components electronic cards of vertical mounted behind the four side panels. Any follows a self-constructed pres- Soche symmetrical, aimed at reducing the interference between the various circuit sections. In the central part are placed two toroidal transformers (A) high-turnover In an integrated amplifier which is pro- acts as center of gravity of a plant im- carrier can not miss out quality headphone (for impedance higher 50 ohms), driven directly by the fol- tion with pre buffer separated. The insertion tion of the headset automatically sets you in "muting" the chip, with the ignition any of its red LED. Adjustment Headphone volume is through the main dial affinacata two small buttons that regulate the balance- tion between the channels, in steps of 1 dB. On the rear panel, the connections appear to be of good quality, but the com- plexus of the realization that consolidates a well-deserved reputation for Bryston in terms of reliability even in the long term. ra and texture, which feed stages dedicated amplification, they are stuck on the bottom of the unit and shielded by a thick metal sheet (B) which acts as a heat sink base and the sche- by supply of the service circuits for the ignition device (C); in this card is placed a power- re switching in rectangular container (D), with protections against short circuits, so- overload and overvoltage. A further toroidal transformer instead embraces- to in a plastic color ce- leste (E) mounted on a riser card behind the front panel, it is made with a profiled element of considerable thickness (over 6 mm) aluminum brushed side (F). TESTS Bryston B135 SST 2 Listening L ' listening to the Bryston was performed in the hall of our preparation. Simple and effective immediately the match- ment with different speaker systems at our disposal, there- is the considerable flexibility of the power section analyzed in technical section by Fabrizio Montanucci. Once again is in evidence that the behavior in terms of fairness Sound is linked hand in glove with the goodness of the project and the qual- quality of construction. The first taste was a classical piano as the Sonata in Si of Liszt performed by Nojima for Reference Recordings. Subdued the introduction, with a striking "dark" silence between notes, and the significant impact of the famous attack, which has a of the most intense moments of the piano literature. The body of the instrument is defined, the timbre nicely neutral, with crystalline features that focus finishing the ar- monic higher. Each portion of the keyboard receives the right pe- I know, including the first octave is repeatedly stressed in the ac- agreements more intense, but the more I appreciate the flow ruscellante notes, in brilliant passages and fast scan from the lively rhythm mica. More complex reading of the agreements is entrusted to the trans- ence of a record average clean and polished rather than pun- tigliosità extreme acute. Some achievements "frizzantine" in vogue in certain circles not belong to the world Bryston. With the demanding ancient instruments (I will not dwell too much on incisions used, but they are always available to provide a detailed cut discography) appreciated the cleanliness and simplicity that are celebrated in the achievements of the Canadian manufacturer. The articulated harmonics of the violins original (difficult to reproduce without the tip of glassiness that someone mistook for accuracy) are re- finished with taste, just out in a framework hued call King and bright. Archi structured uniformity in color and phrasing and there is support at the bottom of cellos and- trabbassi. Interestingly, the sense of "filling" of the sound space also in the most delicate step, in which the scene is maintained well delineated. In the symphonic parts more extrovert (which I love to listen to volume high) it captures a broad instrumental extended far beyond the relative position of the speakers. The dynamic contrast is divided effortlessly, even in seemingly expressive nuances "Minor" which each director takes the greatest care. I would rather that one of the most fascinating features is the ease with which goes from one extreme to another sound expression of a large orchestra. The pianissimo is smooth and detailed, head- we offer substance and substance to the most delicate passages. In continue the ratings is highlighted once again the setting neutral. Some might see it as a lack of personal ity, but here we are dealing with an instrument of reproduction, not a musician in the flesh. Too often in assessing a component of a plant there is draws on elements only subjective. There are also parame- tri trust music that can not be ignored, ele- ments which have become essential, especially by those who has experience of listening to "real" music. If this ag- we get the enjoyment of playing and just like in- listening, we are confident that the thrill of loyalty will not be never the less. Our Bryston manages to combine technical prowess ca with valid reasons objectively and subjectively musical never fail to provide you with the most accurate engravings full enjoy- tion sound. M. Stork
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AUDIO REVIEW n. 339 2012/gennaio December 2013 55th The power amplification (G) is divided in mirror image on both sides of te- the Frame that host the finned heat sinks. The fastening technology of its tabs uses two connectors professional comb (H) which engage on the two cards attached to a rear panel (I) (where some of the inputs, the part of- gitale and the speaker connections) and the other to the front, where it is place the power supply section, sepa- installment for each channel, and the circuits related to Services. A solution "old style" of absolute effi- effectiveness (often used even in com- ter and electronic equipment some complexity) as it facilitates considerably the phases of assembly and removable for a quick response replacement of parts. In conclusion, the internal construction re- flexes the excellent workmanship of the device, not less than appears from the accurate functional and aesthetic design. The layout and the engineering are virtually perfect, garnzia the traditional reli- Bryston reliability. Marco Cicogna TESTS Bryston B135 SST 2 H H G The H H G A B A F D C It
