Bryston BP25 user manual

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OWNER’S MANUAL
Instructions For
Bryston PreAmplifiers
Models BP20 & BP25

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IMPORTANT SAFETY INSTRUCTIONS The lightning flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage " within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to per- sons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanyi

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BP20/25 PreAmplifiers All fuses are 5mm x 20mm, time lag type and are accessi- General Specifications: ble only by removing the top cover. When replacing Frequency Response: fuses, disconnect the power cord before opening the unit! 20Hz-20kHz +/- .05dB Recommended replacement fuses: Maximum Output: for 100/120VAC models: Littlefuse 218.315 15 volts unbalanced, 30 volts balanced Bussmann GMC-315mA for 230/240VAC models: Littlefuse 218.160 IMD/THD: <0.0015% at 3 volts out Bussmann GMC-160mA Sens

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BP20/25 PreAmplifiers To turn on a Bryston amplifier by turning on the MPS-1: INTRODUCTION 1st) Connect the COM and +12V terminals of the three ter Thank you for choosing a Bryston PreAmplifier. Bryston minal connector on the rear panel of the MPS-1 to the welcomes any suggestions you may have, or comments IN terminals on a Bryston power amplifier intended for regarding the operation of your amplifier. We consider you, a 4~14V AC/DC control signal. our customer, to be Bryston’s most important

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BP20/25 PreAmplifiers puts are capable of driving 30 volts into any load of 600 Connect the pre-amplifier's left and right outputs from either ohms or greater. Do not short any of these three pins togeth- the RCA or Balanced XLR connectors to the appropriate left er! and right input jacks on your power amplifier. Balanced Single-ended or unbalanced outputs: As with unbal- cables are an advantage if you are using long runs of cable, anced inputs, these connectors are gold plated RCA (greater than

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BP20/25 PreAmplifiers PHONO EQUALIZATION MODULES (Optional): FRONT PANEL CONTROLS: Bryston’s phono equalizer circuitry is available in both BP20 MUTE/NORMAL TOGGLE SWITCH: Mutes or releases and BP25 pre-amplifiers. It features highly accurate equal- mute at the main outputs, (not ‘To Tape’ outputs), without ization, extremely low noise and distortion and provides changing the volume control setting, each time pushed. headroom margins sufficient to prevent overload from any known phono sourc

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BRYSTON 20 -YEAR WARRANTY Bryston products are warranted to be free from manufacturing defects for a minimum of twenty years from the original date of manufacture. This includes parts, labour and return shipping to the first owner and all subsequent owners. Warranty coverage is automatic and commences with the original date of manufacture which is kept on file at Bryston. In the event of a defect or malfunction, Bryston will remedy the problem by repair or replacement, as we deem necessary, to r