875HT OWNER’S MANUAL
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 persons. 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 accompanying the product.
875HT EIGHT CHANNEL POWER AMPLIFIER Table of Contents Important Safety Instructions General Introduction Introduction Description Shipping Box & Packing Materials Installation Wiring the 875HT Page 1 Front Panel Power Switch LED Indicators Fuses Page 2 875HT Rear Panel Input/Output Connections Single Ended Input Connector Balanced Input Connector Balanced versus UnBalanced Inputs Input Select Switch Stereo/MonoSwitch Output Binding Posts Page 3 875HT Rear Panel Input/Output Connections contd.
875HT EIGHT CHANNEL POWER AMPLIFIER INTRODUCTION Thank you for choosing the 875 Eight Channel Power Amplifier. Bryston welcomes any suggestions you may have, or comments regarding the operation of your amplifier. We consider you, our customer, to be Bryston’s most important resource, and your opinion is very much appreciated. DESCRIPTION The 875HT is a modular multi-channel audio power amplifier design of 8 x 75 Watts per channel. It is essentially 4 stereo amplifiers.
875HT EIGHT CHANNEL POWER AMPLIFIER FRONT PANEL OF 875HT-Silver: FRONT PANEL POWER switch The front panel label '875HT POWER’ is a switch used to apply or remove A/C line power to the 875 soft start circuitry. Push the switch and the 875 will initiate the start up sequence. The switch cap remains indented when circuits are on. Push the switch again the 875 will initiate the power off sequence.
875HT EIGHT CHANNEL POWER AMPLIFIER 875HT REAR PANEL INPUT/OUTPUT CONNECTIONS 1 Single Ended Input Connectors This input connector for single-ended or un-balanced signals accepts standard ‘RCA’ or ‘Phono’ connectors. 2 Balanced Input connector. This input connector accepts standard 3 pin ‘XLR’ male connectors. Pin 1 is signal ground Pin 2 is positive phase (+) signal Pin 3 is negative phase (-) signal BALANCED vs SINGLE ENDED INPUTS The balanced input requires a balanced pre-amp source.
875HT - EIGHT CHANNEL POWER AMPLIFIER P P P BANANA PLUGS offer a quick disconnect option. Before inserting a banana plug into the binding post be sure to tighten the post nut to avoid rattling and to provide full insertion of the banana plug. Gold plated locking banana plugs are available from Bryston. SPADE LUGS provide high contact area and secure fastening. Lugs should be gold plated. See diagram for details. Post diameter is 5/16’ ( 8mm ),lug width 5/8” (16 mm).
75HT - EIGHT CHANNEL POWER AMPLIFIER Typical 5.
875HT - EIGHT CHANNEL POWER AMPLIFIER Typical 7.
875HT - EIGHT CHANNEL POWER AMPLIFIER HIGH POWER 7.
875HT - EIGHT CHANNEL POWER AMPLIFIER 8
875HT - EIGHT CHANNEL POWER AMPLIFIER A/C POWER CONTROL External control voltage power up ( Local / external switch) To power-up the 875 using an external control voltage, supply a 4v to 12v A/C or DC control voltage to the ‘IN’ terminals of the “Power-Up” connector. The front panel ‘Power’ switch needs to be off for proper remote operation. Use paired wire of 22 gauge to 18 gauge between the source device and the 875. The amplifier will now power-up when the control voltage is present (on).
875HT - EIGHT CHANNEL POWER AMPLIFIER Technical Specifications Power Output 75 watts per channel into 8 ohms 100 watts per channel into 4 ohms Gain Select and Sensitivity 29dB - .850Vin = 75W @ 8 Ohms - single ended input 23dB - 1.7Vin = 75W @ 8 Ohms - balanced input Input Impedance 20 Kohms single ended 40 Kohms balanced Distortion IMD or THD+noise < 0.007% 20Hz to 20kHz at 75 watts into 8 ohms, < 0.010% 20Hz to 20kHz at 100 watts into 4 ohms Noise Measured with input shorted - 20Hz to 20kHz.
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.
