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These measured performance criteria are call the ‘Primary Constants’. They are R-resistance, L- inductance, C- shunt capacitance and G-shunt conductance. You can play around with all types of exotic packaging and add-on appendages you like but ultimately the measured performance (primary constants) tell the tale. COAX INTERCONNECT CABLES An analogue Preamp/Amplifier connection is a ‘high impedance interface’ therefore; you are looking for low measured Capacitance. An interconnect cable acts like a capacitor in the signal path so the better that capacitor the better the interconnect. We use an interconnect wire with (very low capacitance) and the RCA connectors are made for us in Switzerland. The RCA cables ‘make and break ground’ first and last when connecting and disconnecting. This prevents ugly pops and bangs from going through your system with the possible negative results. XLR INTERCONNECT CABLES The XLR cables we use are also very low in capacitance. Actually the XLR cable we are currently using is in fact low noise balanced microphone cable with 100% shield coverage against RF. The advantage of Balanced XLR cables is that they have a noise canceling effect know as ‘common mode noise reduction’. This helps prevent noise and hum from affecting your system. With today’s complexity of audio and video surround systems this is a big plus, so if you ‘got em-use em’. DIGITAL CABLES VIDEO CABLES Video cables also operate at very high frequencies - typically 5-6 MHz for Composite and S-Video and 8-30 MHz for Component Video depending on the scan rate and resolution. So again understanding the wavelengths of the signals and interfaces involved is important. BRYSTON ANALOG/DIGITAL/VIDEO CABLE BRYSTON BALANCED XLR CABLE 5 BRYSTON SPEAKER CABLES SPEAKER CABLES The Amplifier/Speaker interface is a ‘low impedance’ connection. Therefore, in a speaker cable you are looking for low ‘self inductance’ (because inductance rolls off the top end) as opposed to ‘low capacitance’ required in the RCA or XLR analogue interconnect. For speaker cables we use a stranded 9 gauge linear crystal copper with ‘Heavily Gold plated’ Spade lugs or Expandable Banana plugs specially made for Bryston. IN SUMMARY: 1. The connection should be of similar metals (preferably gold) and be airtight. If not airtight it will break down molecularly over time and begin to rectify or produce a diode effect on the signal. 2. With all the RF floating around today the better the ‘Shield’ on the interconnect the less intrusive the RF will be. 3. The connection between your analogue Source components (Preamplifier, CD Player, Tuner, DVD Player etc.) is a ‘High Impedance’ connection and the interface between your power amplifier and your speakers is a ‘Low Impedance’ connection. So, the requirements are totally different for optimizing these interfaces. 4. Digital and Video cables are much more susceptible to reflection/phase/cancellation problems because of their short wavelengths relative to cable length. As you can see from the above, no surprise that people hear differences in cables when connected to the variety of equipment in the market today. Given the differences in input and output impedance’s between transistor and tube gear, the lack of understanding of the high impedance and low impedance interfaces, the world of RF, and the digital/video connection issues no wonder we have these differences of opinion. RECOMMENDATIONS: Bryston highly recommends keeping the speaker wires as short as possible and utilizing XLR balanced lines if available. Given the choice of long interconnects and short speaker leads or short interconnects and long speaker leads – choose long interconnects (preferably Balanced) and short speaker leads. With digital and video cables finding out the sending and termination requirements is very important due to the very short wavelengths relative to cable lengths involved. BRYSTON SPEAKER CABLE BRYSTON SPADE BRYSTON BANANA BRYSTON 5–YEAR CABLE WARRANTY I 6 BRYSTON WARRANTY In a world where most things seem to need frequent upgrading, repair, or replacement, how can Bryston offer a comprehensive, unconditional, and fully transferable warranty on every audio product we make? The answer would quickly become apparent if you were to tour Bryston’s plant in Peterborough, Ontario, Canada. State-of-the-art design facilities, with the latest CAD and circuit simulation software, and an inventory of some of the best and most reliable parts on the planet, combine with a manufacturing philosophy that eschews the artifacts of mass production — robots, moving assembly lines, and, frankly, shortcuts. Every Bryston audio component is handcrafted by people who take great pride in building the very best. Starting with a bare circuit board, for example, each component is hand selected and installed, every wire is cut and bent by hand, every connection is hand soldered. On average, it takes thirty to thirty-five person-hours to assemble a single Bryston ...

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