Burns and Baldwin solid state public address systems
STILL WORKING ON THIS PAGE
Photo courtesy Paul Day
Burns Orbital Stage One (877)
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)
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
Baldwin Orbital Stage Three
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
