GENERAL DESCRIPTION

Bryston's 270 power amplifier is a "70 VOLT" monaural version of the 2B and consists of a single amplifier module - with a "42v power supply - which can deliver 65 watts into 8 ohms (120 watts into 4 ) via the DIRECT output or into 60 watts via the 70 VOLT output transformer.

CLIPPING INDICATORS

The 270 amplifier uses a 2 colour LED with green indicating power on and red indicating actual overload or distortion.. Once the indication contains a substantial red content it should be considered as a sign that the level is too high and may cause speaker damage if allowed to continue.

INPUT CONNECTORS

The 270-PRO is supplied with a combination 3 pin balanced XLR and 3 conductor ¼” Phone jack. Onthe XLR jack, pin 1 is ground, pin 2 is POSITIVE & pin 3 is NEGATIVE). On the phone jack, TIP is positive, RING is negative & the sleeve is ground. Fully discrete active input circuitry is used; i.e. no transformers. The 270-REG is supplied with an unbalanced RCA/phono jack.

All input connectors are gold plated and should be used only with quality gold plated input cable connectors as a poorly plated connector will eventually corrode through the gold flash. Bryston makes cables with appropriately heavily plated, high quality connectors, available through your dealer.

OUTPUT CONNECTORS

The 270 is equipped with four binding post terminals (2 red, 2 black) which can accept either standard banana plugs or bare wire. One BLACK/RED pair is the DIRECT output and the remaining pair is the 70 VOLT output (see rear panel for wiring instructions). Since the binding posts are gold-plated we recommend gold-plated banana plugs be used for the lowest distortion.

N.B. Do not attempt to remove the red or black connector nuts from the binding post connectors. They are not removable and attempting to force them off may break the connector or strip the threads.

OUTPUT CABLES

For some time there have been available on the market special speaker cables constructed for extra high current and low loss and distortion. These cables will cause no difficulty or instability with any Bryston amplifier. In fact, we recommend that low inductance cables be used for the smallest loss of signal between amplifier & speaker.

GROUNDING and the GROUND SWITCH

The left most switch on the rear panel is a GROUND LIFT switch. It is connected between the chassis ground (including the third prong on the power line cord) and the signal ground. This switch is normally left

in the connected position . Occasionally a multi-amplifier rack installation, or an unusual grounding situation with a preamp using a three wire power line cord, will cause a ground loop between the signal ground and the chassis ground. This switch will allow the elimination of the resulting hum in such cases

without resorting to a "cheater" plug by switching to the separated position . Note that this switch does not disconnect the chassis from the third prong on the power line cord which must be left intact for safety reasons.

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Bryston 270 manual General Description, Clipping Indicators, Input Connectors, Output Connectors, Output Cables
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270 specifications

The Bryston 270 is a high-performance digital stereo preamplifier that stands out in the world of audiophile equipment. Engineered with precision and designed to deliver exceptional sound quality, it encapsulates the essence of Bryston's commitment to audio excellence.

One of the main features of the Bryston 270 is its advanced digital signal processing capabilities. It is equipped with a high-quality digital-to-analog converter (DAC) that supports multiple high-resolution formats up to 32-bit/192kHz. This allows audiophiles to experience music with an unparalleled level of detail and clarity, making it an ideal choice for those who demand the best from their audio systems.

The 270 also integrates a robust selection of input options, catering to the diverse needs of modern audio setups. It includes multiple digital inputs such as AES/EBU, S/PDIF, and USB, along with analog inputs for added versatility. This feature ensures seamless connectivity with various sources, ranging from vinyl players to modern streaming devices.

Another standout characteristic of the Bryston 270 is its exceptional build quality. Like all Bryston products, the 270 is designed to last, featuring a solid chassis and high-quality components that minimize distortion and interference. The unit employs premium-grade capacitors and resistors, ensuring that audio signals remain pure throughout the signal chain.

The preamp also boasts a user-friendly interface, including a clear display and ergonomic controls. This intuitive design makes it easy for users to navigate through settings and fine-tune their audio experience. Additionally, the remote control provides added convenience, allowing users to adjust volume levels, select inputs, and manage playback from the comfort of their listening position.

Bryston's proprietary technology extends to the preamp's power supply, which is carefully designed to provide stable and clean power to the internal circuits. This results in improved dynamic range and enhanced overall performance.

In summary, the Bryston 270 digital stereo preamplifier is a sophisticated piece of audio equipment that merges elegant design with advanced technology. With its high-resolution DAC, versatile connectivity options, exceptional build quality, and user-friendly interface, it is tailored for audiophiles seeking a top-tier listening experience. Whether in a dedicated home theater or a casual listening environment, the Bryston 270 is poised to redefine your audio enjoyment.
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