Burns Orbital PA Amplifiers

Burns and Baldwin solid state public address systems

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Stage One Scan.jpg

Photo courtesy Paul Day

Burns Orbital Stage One (877)

Burns Orbital Stage One Front Panel.jpg

Size: 12" x 9" x 6" (W x D xH)

Weight: #

Power Output: 50watts "maximum sine wave power output"

T.H.D: 1% at 50watts

Frequency Response (tone controls flat): -3dB 30Hz to 15KHz

Treble Control: +/-16dB at 10KHz

Bass Control: +/-16dB at 50Hz

Output Load: Two outputs at 6ohms each

(Separate speaker impedance matching transformer available if required)

Signal to Noise: 60dB

Mains Input

  • 200/250V AC. No adjustment

  • 105/135V AC to special order (100/125V AC in early publicity)

Channel 1. Single 1/4" jack input

  • Input impedance 330Kohms

  • Input Sensitivity: 10mV at 500Hz

  • Bass Cut Control: -12dB at 50Hz

  • Volume control

 

Channel 2

  • As Channel 1

Channel 3. Two 1/4" jack inputs

  • Common Volume Control

Input 1:

  • Input impedance 330Kohms

  • Input Sensitivity: 10mV at 500Hz

Input 2:

  • Input impedance 1Mohms

  • Input Sensitivity: 50mV at 500Hz

(Low impedance version available to order)

Master Controls

  • Treble

  • Bass

  • Volume

Burns Orbital Stage Two (872)

Burns Orbital Stage Two Front Panel.jpg

Size: #

Weight: #

Power Output: 50watts "maximum sine wave power output"

T.H.D: 1% at 50watts

Frequency Response (tone controls flat): -3dB 30Hz to 15KHz

Treble Control: +/-16dB at 10KHz

Bass Control: +/-16dB at 50Hz

Output Load: Two outputs at 6ohms each

(Separate speaker impedance matching transformer available if required)

Signal to Noise: 60dB

Mains Input

  • 200/250V AC. No adjustment

  • 105/135V AC to special order

Channel 1. Single 1/4" jack input

  • Input Impedance: 330Kohms

  • Input Sensitivity: 10mV at 500Hz

  • Bass Cut Control: -12dB at 50Hz

  • Volume control

 

Channel 2

  • As Channel 1

Channel 3

  • As Channel 1

Channel 4

  • As Channel 1, less Bass Cut control

Channel 5. Two 1/4" jack inputs

  • Common Volume Control

Input 1:

  • Input Impedance 330Kohms

  • Input Sensitivity: 10mV at 500Hz

Input 2:

  • Input impedance: 1Mohms

  • Input Sensitivity: 50mV at 500Hz

 

Low impedance version available to order

  • Input Impedance: 1500ohms to suit 30 to 600ohm microphones

  • Input Sensitivity: 500µV all channels

Master Controls

  • Dimension (Reverb Level)

  • Treble

  • Bass

  • Volume

Burns Orbital Stage Three

Burns Orbital Stage Three Front Panel.jp

Baldwin Orbital Stage Three

Baldwin Orbital Stage Three Front Panel.

No details of the specs available at the time of writing, but impedance and sensitivity are probably the same as the Stage Two.

 

Size: #

Weight: #

Power Output: 120watts "maximum sine wave power output"

T.H.D: #

Frequency Response (tone controls flat): #

Treble Control: #

Bass Control: #

Output Load: #

Signal to Noise: #

Mains Input:

  • 200/250V AC. No adjustment

  • 105/135V AC to special order

Channel 1: Single 1/4" jack input

  • Input impedance: #

  • Input Sensitivity: #

  • Bass Cut Control: #

  • Volume control

  • Reverb On/Off switch

 

Channel 2:

  • As Channel 1

Channel 3:

  • As Channel 1

Channel 4:

  • As Channel 1, less Bass Cut control

 

Channel 5: Two 1/4" jack inputs

Input 1:

  • Input Impedance: #

  • Input Sensitivity: #

Input 2:

  • Input Impedance: #

  • Input Sensitivity: #

  • Volume control

  • Reverb On/Off switch

 

Low impedance version available to order:

Master Controls:

  • Dimension (Reverb Level)

  • Treble

  • Bass

  • Volume

Burns Transformer Pad

Burns, like Watkins, specified some of their output stages to use 6ohm speakers. The Burns Orbitals have two outputs labeled as 6ohms each, giving a total load on the amplifier of 3ohms. They sold a matching transformer (or pad) as an optional extra to use with other manufacturers' cabinets.

Stack: Grain orientated steel

Input Impedance: 3ohms

Output Impedance: 2ohms, 3ohms, 7.5ohms, 15ohms

Power Handling Capacity: 70watts

Frequency Response: -3dB at 30Hz and 16KHz

Size: 4" x 41/4" x 33/4"

Burns Column Speakers

Catalogue extract courtesy of Jon Black at www.blackguitars.com

A Guinea (gn) is 21 Shillings (£1.05)

COLUMN SPEAKERS

In leatherette covered stressed plywood foundation cases with rubber feet and carrying handle. Each cabinet has 4 x 10" Orbital Speakers with a handling capacity of 40watts.

PRICES

878. DeLuxe Speaker Cabinet    34gns

875. Standard Cabinet     21gns

874. Super Standard Speaker Cabinet with DeLuxe Speakers     24gns

888. Column Speaker     33gns

Burns 410 PA Column.jpg