Bryston 28B3 Owner'S Manual Download Page 5

28B

3

 Amplifier

5

BALANCED INPUT

STATUS

IEC-320 C14 INLET

MAINS SWITCH & BREAKER

NEGATIVE

OUTPUT

POSITIVE

OUTPUT

REMOTE TRIGGER

LOCAL   EXT

IN

OUT

WARNING

Do not connect positive terminals to negative terminals. 

Do not connect any speaker terminals to ground. Risk of 

hazardous energy. Make proper speaker connections. 

Use class 2 wiring.

AVERTISSEMENT

Ne 

pas raccorder les bornes positives aux bornes 

négatives. Ne pas raccorder les bornes d'enceintes à la 

terre. Risque d'énergie dangereuse. Faire la connexion 

des enceintes appropriées. Utiliser la classe 2 câblage.

1

2

3

Connecting to Loudspeakers

Connection to loudspeakers is accomplished by 

attaching high quality speaker cable to the Output 

Binding Posts (see “Rear Panel” on page 8) per 

the following instructions. 

The 

RED

 binding posts are connected to the 

positive channel output. Both RED posts are 

internally connected together. Connect both 

or either RED post to the (+) terminal on the 

loudspeaker.

The 

BLUE

 binding post is connected to the negative 

(-) output. Both BLUE posts are internally connected 

together. Connect both or either BLUE post to the (-) 

terminal on the loudspeaker. 

Never connect either binding post to a ground! The 

amplifier is balanced.

The output binding posts provide three different 

interconnect options. Combinations may be used 

when bi-wiring.  Cables should be kept as short 

as practical and should never be terminated with 

connectors that may become confused for AC 

power connectors. Cables should be dressed away 

from input and power cables.

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. Post diameter is 5/16” 

(8mm), lug width 5/8” (16 mm).  Gold plated spade 

lugs are available from Bryston. 

Stripped bare wire up to 3 gauge can be inserted 

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. Do not over tighten or the 

binding post may become damaged. Note that 

copper wire is malleable and may require further 

tightening after the initial installation.

To prevent the risk of equipment damage or 

personal harm, use only Class 2 rated loudspeaker 

wire properly terminated and connected securely to 

the binding posts.

Connecting Audio Inputs 

The Bryston Cubed amplifier can receive analog 

audio from any preamp or surround processor with 

volume controlled line-level outputs. Balanced XLR 

and TRS as well as singled ended RCA inputs are 

both available and can be selected using the Input 

Select switch on the rear panel of the amplifier. 

From Preamplifier

To Loudspeaker

Summary of Contents for 28B3

Page 1: ...28B3 Amplifier Owner s Manual ...

Page 2: ...AIN READILY OPERABLE BRYSTON LIMITED WARRANTY Bryston analog audio products are warranted to be free from manufacturing defects for twenty 20 years from the original date of manufacture The warranty includes parts and labour Bryston digital products and cables are warranted for five years from the original date of manufacture The warranty includes parts and labour Bryston products having motorized...

Page 3: ...Description 4 Features 4 Shipping Box and Packing Material 4 Installation and Usage 4 Ventilation 4 Connecting to A C Power 4 Connecting to Loudspeakers 5 Balanced vs Single Ended Input 6 Power Conditioners 6 Front Panel 7 Rear Panel 8 28B3 Specifications 10 Dimensions 11 ...

Page 4: ...ise Replacement packing materials consisting of a shipping carton with plastic foam inserts is available from Bryston for a small fee Installation and Usage Ventilation Bryston has deliberately chosen to omit fans from our amplifiers in an effort to minimize the noise level in your listening environment Instead we use only passive heat sinks which are fully capable of maintaining a safe operating ...

Page 5: ... be kept as short as practical and should never be terminated with connectors that may become confused for AC power connectors Cables should be dressed away from input and power cables 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 lockin...

Page 6: ...ision and clarity External Control Voltage To power up the amplifier using an external control voltage supply a 5V to 12V AC or DC control voltage to the IN terminals of connector fig 1 Use paired wire of 22 to 18 gauge between the source device and the Bryston Cubed series amplifier The appropriate mating connector is supplied with each amplifier Set the External Turn On switch to External See 7 ...

Page 7: ...ccurs when the channel output level no longer can follow the level increase at the input over driven input condition When a channel is driven into clipping the channel LED will change from green to red then back to green when the level is reduced Momentary clipping can be tolerated however it indicates that maximum undistorted power has been surpassed and potential speaker damage may result if ove...

Page 8: ... wire Combinations may be used when bi wiring Cables should be kept as short as practical and should never be terminated with connectors that may become confused for AC power connectors Cables should be dressed away from input and power cables Only use Class 2 Rated Wiring No other wiring is permitted for use 5 Master Circuit Breaker The Cubed series amplifier uses a magnetic trip circuit breaker ...

Page 9: ...n the Power On state is governed by voltage applied to IN terminals of the Remote Power Up connector The front panel power switch must remain in the ON position External Control Voltage on page 6 for instructions regarding connection and usage 8 Power Status Indicator Plugging in the power cord applies power to the amplifier The status indicator will initially flash green The number of flashes ind...

Page 10: ...nded Balanced Balanced 15kΩ 15kΩ 15kΩ IMD 60Hz 7kHz 4 1 0 005 THD N 20Hz 20kHz 1000W 8Ω 0 005 Noise input shorted 22Hz 22kHz Single Ended Balanced 116dB 117dB Slew Rate 65V µS Bandwidth 1Hz to 100kHz 3dB Damping 20Hz 8Ω 300 Weight Pounds Kilograms 93 42 Power Consumption Watts Standby Idle 1000W 8Ω 166W 8Ω 0 5 225 1790 810 Heat Load BTU Hour Idle 1000W 8Ω 166W 8Ω 768 6108 2764 ...

Page 11: ...28B3 Amplifier 11 8 1 in 7 8 in 7 in 4U 17 in 19 in 19 in 18 4 in 16 8 in Dimensions Minimum recommended clearance for heat dissipation 17 C Series 19 C Series includes front handles ...

Page 12: ...Bryston Limited 677 Neal Drive Peterborough Ontario K9J 6X7 Canada Phone 705 742 5325 www bryston com 300046 2016 02 04 ...

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