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Summary of Contents for Sebatron VMPQuadPlus
- Page 1 ~Sebatron~ Innovative Australian Audio VMPQuadPlus operating manual Copyright Sebatron 2017...
- Page 2 Table of Contents: VMPQuadPlus High Voltage Four Channel Valve Microphone Preamplifier with Direct Input 1/Introduction 2/Features 3/Functions and dials 4/Connections: inputs and outputs 5/Operation: mic, Direct Input 6/Operation: processing line level signals 7/Maintenance: valve type, replacement 8/Specifications 9/Safety and precautions...
- Page 3 The VMPQuadPlus is a preamplifier that not only serves its purpose in amplifying microphone and direct input signals to a suitable recordable line level but also has the ability to musically enhance and enrich signals either subtly or heavily so that they are both more pleasing and more exciting to the ear.
- Page 4 2. Features VMPQuadPlus -True Class A discrete circuit for wide crystal clear frequency response -Full high tension plate rail voltage for extended dynamic range -DC filament rail for low noise operation -Quality 12AT7/ecc81 dual triode valve per channel -Two band passive EQ on each channel...
- Page 5 3. Functions and Dials -phantom on/off toggle Activates the +48vdc power for condenser microphones. -LED signal indicator Indicates when an audio signal is present on the channel. -Direct Input socket A high impedence unbalanced phono plug input that goes to the grid of the valve.
- Page 6 4. Connections -XLR inputs (4) Fully balanced transformer coupled floating input.Pin two hot. -XLR outputs (4) Fully balanced actively buffered output.Pin two hot. XLR inputs/outputs TRS outputs -TRS phono outputs (4) Seperate balanced phono outputs that can be used independently of the XLR outputs.Tip hot ,sleeve cold.
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Page 7: Operation
If mic is condenser type then turn down output level control and activate phantom power switch. 2. Plug output of the VMPQuadPlus preamp (using balanced XLR or unbalanced/balanced phono output cables) into soundcard etc. 3. For default setting the pad/gain control is usually best set in the middle (12o’clock) and gain toggle set to normal.Confirm signal is in a good range when... - Page 8 Generaly speaking though,we recommend the direct input socket on the front panel as this is a direct path to the grid of the valve. 1.Plug line level signal into VMPQuadPlus by either using balanced XLR input on back or unbalanced phono Direct Input on front.
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Page 9: Maintenance
JAN,National Electric,Mullard. Valve life : As the VMPQuadPlus is a preamp then valve wear is not as severe as standard guitar amplifiers etc. Valve life also varies from valve to valve but is generally three to five years with average useage and up to ten years if used sporadically. -
Page 10: Specifications
8. Specifications Inputs : Balanced XLR (pin 2 hot) and (direct input) unbalanced 6.5mm phono. Outputs : Balanced XLR (pin 2 hot) and balanced TRS 6.5mm phono (tip hot). Gain: 70db per channel Frequency response: 20hz-60khz +/- 2db , 20hz-110khz +/- 3db ‘air’ on Mic input impedance: 1K ohm Direct Input impedance: 1M ohm Maximum input level: +10dbu mic input ,+16dbu Direct Input... -
Page 11: Safety And Precautions
Servicing : Please do not open the case unless instructed to do so by Sebatron.There are no user serviceable parts inside apart from the valves.If your unit is not performing as expected please contact your dealer to find the nearest authorised service agent.
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