Bryston 14b st owners manual

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GENERAL INSTRUCTIONS Installation Setup And Recommendations: Warranty Information: Thank you for choosing a Bryston product. We welcome any suggestions you may have, or comments regarding the operation of your am- plifier. We consider you, our customer, to be Brystons most important resource, and your opinion is very much appreciated. Bryston products are warranted to be free from manufacturing defects for a minimum of 20, (twenty), years from the original date of manu- facture. This includes all parts, labor and one- way return shipping. This warranty covers the original owner and any subsequent owners. The warranty is retroactive for any Bryston product purchased within the last twenty years. Tampering by anyone other than factory author- ized personnel voids the warranty. Warranty service may be obtained by returning the unit to any authorized Bryston dealer or distributor. You may also contact the Bryston factory or na- tional service offices directly at the location listed on the rear page of this manual. Please keep the original box and all packing material. This will ensure the amplifier is pro- tected in the unlikely event you have a problem and must return it for service. No warranty card is necessary to initiate your coverage. Please refer to the back page for more detailed war- ranty information. CAUTION: Your 14B ST is a Stereo Amplifier only and the outputs should never be con- nected in Series/Bridged or Parallel modes. Make Sure The Circuit Breaker Switch Is OFF Until All Connections Are Made. Power Switch(s): There are two power switches on the 14B. The front panel ST Power Switch and the rear panel On/Off Circuit Breaker. The 14B has two, 2-position slide-switches labeled Power Up and Ext Trig and 1-Circuit Breaker Factory Settings are: POWER UP -“ LOCAL, EXTERNAL TRIGGER -“ LOCAL, CIRCUIT BREAKER SWITCH -“ OFF After confirming that all switches are in the proper positions and all input and output connections are correctly made, plug the amplifier into the proper wall outlet and activate the circuit breaker switch. The power amplified may now be turn on or off us- ing the front panel ST power switch. If the rear panel power-up switch is in the Local position and the amplifier is connected to the A/C power source the amplifier will turn on/off using the front panel ST power switch. If for any reason the power is removed from the A/C line (ex: power fail- ure) the amplifier will turn off and will not turn on again after A/C is restored until the front panel ST power switch is manually reactivated. When the rear panel power-up switch is in the Auto position then any time A/C power is sup- plied (Power Bar, Switched power outlet etc.) the 14B will automatically power-up without having to acti- vate the ST power switch. The Bryston 14B-ST is a Stereo 2-channel power amplifier consisting of two totally inde- pendent amplifier modules, each with its own power transformer and +/-60V power supply. Each audio channel provides connections for balanced or single ended input and will sup- ply a minimum of 500 watts of power into 8 ohms or 800 watts into 4 ohms. Bryston 14B-ST Amplifier Description: PLEASE REFER TO: BRYSTONS SAFETY MANUAL FOR FURTHER OPERATING INSTRUCTIONS.

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Input: The 14B ST has two inputs per channel, one for a balanced source, and one for single ended or unbalanced source. The BAL input connector will accept either a 3 pin XLR type or a 1/4 Tip/Ring/Sleeve type. The positive (+) terminal is pin 2 on the XLR and tip on the TRS. The input impedance is 15K ohms. The input pins are gold plated. Input sensitivity is selectable using the INPUT slide switch. In the BAL REG position 2 Volts in = 100 Watts at 8 ohms output. This is the recommended setting when using Bryston preamplifiers or any pre- amplifier having active balanced outputs. This setting also produces the lowest amplifier noise floor. The BAL+6dB setting adds 6 dB of gain to provide an input sensitivity of 1 Volt in = 100 Watts at 8 ohms output. This setting is primar- ily for balanced outputs that are transformer coupled, or other low level sources. The UNBAL setting selects the gold plated RCA type tip/sleeve connector. The input im- pedance is 50K ohms. The output is in phase with the input and the sensitivity is 1 Volt in for 100 Watts into 8 ohms output. BRYSTON 14B ST MANUAL Page 3 14B ST Rear Panel Connections: Balanced Vs Unbalanced: Balanced cable interconnects should be used whenever possible, as they provide common mode noise protection from external electrical interference, and with active balanced out- puts a 6 dB higher signal level flows in the ca- ble. The unbalanced cable interconnect is pro- vided for preamplifiers without balanced out- put. Unbalanced cables should be kept to 10 feet or less. Never use longer cables than necessary, never coil excess cable length, and run signal wires away from and never parallel to A/C power or speaker cables. Output: Gold plated output binding posts provide dif- ferent interconnect options. Stripped bare wire up to 3 Ga. can be passed through the hole in the binding post and held in place by tightening the post knob. Additional tightening pressure can be achieved using a coin in the slots of the knob. Wire terminated with ba- nana plugs, spade lugs, or pins are also ac- commodated by the binding posts. Please ob- serve correct polarity (Red/Black) when mak- ing these connections. We recommend gold plated connectors to prevent corrosion and signal distortion. (Bryston has gold plated 5/16 inch spade lugs available). Speaker wire should be kept as short as practical and should never be terminated with connectors that may become confused with A/C power connectors. Speaker cables should be dressed away from input and power cables, and even each other when runs are long. Remote Power Control: You can turn the power amplifier on/off using a 4 -12 volt A/C or D/C voltage using the 4 position screw terminal connector (see rear panel diagram page 4). Insert the 4 -12 volt wire into the input labeled IN (polarity is not important) and then place the Ext Trig (external trigger) switch into the Rem (remote) position. The power amplifier will now power on and off when the control voltage is applied or removed. The connector positions labeled OUT can be used to power another amplifier in sequence. The 4/12 volt control voltage does not appear at the OUT terminals until after the 14B has completely powered up so this allows se- quencing of your power amps without large turn-on surges. WHEN THE EXT TRIG IS IN THE LOCAL POSITION THE 14B WILL IGNORE THE 4/12 CONTROL VOLTAGE AND WILL POWER-UP ONLY WITH THE MANUALLY ACTIVATED FRONT PANEL ST POWER SWITCH.