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Post new topic Lexicon MPX1 hook up to old session 400 please
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Author Topic:  Lexicon MPX1 hook up to old session 400 please
Barry Gaskell

 

From:
Cheshire, UK
Post  Posted 22 Apr 2007 1:35 pm    
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Hi guys.
I've just bought a Lexicon MPX 1.
I've read that the signal from a steel is insufficient to drive an mpx 1 and a line level is required. I'm running an old session 400 and as there are no sends or returns, can anyone help as to the best way to hook it up. I have a Goodrich steel driver III after my guitar and before my vol' pedal. Confused
I sure would appreciate any suggestions.
Thank You.
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Ken Fox


From:
Nashville GA USA
Post  Posted 22 Apr 2007 4:54 pm    
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Input level rear switch should be positioned in. The output is 600 ohms, not really a good output impedance for a guitar amp input. Seems more like a piece of PA gear than a guitar effects processor. I have never used one, so I can't say I am totally sure what can be done with it for a guitar amp application.


From the manual:

Setting Input Level
1. Set the rear panel Input button to the appropriate position for balanced or
unbalanced operation.
2. Press Edit and scroll to the Meters Assign parameter. Make sure that the
meter assignment is Input (the default setting).
3. Press System.
4. Select the Audio menu and scroll to the Input/Clck screen.
5. Select the desired input mode.
6. If you have selected Analog/Int or Analog/Ext, run audio through the unit
and adjust the front panel Input knob so that program material peaks cause
the headroom display to reach the top of the column without lighting the Clip
indicators. An occasional peak which momentarily lights the Clip indicators
is acceptable in most instances, but should be validated by listening to the
actual result. If the the 0dB headroom indicator illuminates frequently, you
may want to use the Soft Sat limiter to reduce overload of the A/D converters.
Press System, select the Audio menu, then select Soft Sat to turn the limiter
On or Off.
If you have selected Dig/Ext, scroll to the Audio Dig In Lvl screen and adjust
the level so that program material peaks cause the headroom display to
reach the top of the LED column without ever lighting the Clip indicators.
The meters are calibrated to light the Clip indicators at a level of > 0.1dBfs.
For digital inputs, a very brief flashing of the Clip indicators means that you
have reached, or are dangerously close to digital clippin



Setting Output Level
1. Press System and select the Audio menu.
2. Scroll to Audio Output and select Analog or Digital.
3. Press System again and select the Modes menu.
4. Scroll to Modes: Bypass and make sure that the assignment is Bypass (the
default setting).
5. Press the front panel Bypass button. The button will light to indicate that
bypass is engaged.
6. Press Edit, scroll to Meters Assign and select Output.
7. Run audio through the unit and use the front panel Output knob to set the
level on your console or amplifier.
The signal level from the 1/4" and XLR outputs is +4dBu. If you have both 1/4"
and XLR cables attached to the output connectors, there will be no change in
level unless you are driving very low impedance loads (600W), where an
attenuation of output level may occur.
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Barry Gaskell

 

From:
Cheshire, UK
Post  Posted 23 Apr 2007 1:10 am    
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Hi Ken
Thanks for that. That seems quite comprehensive. I'll run with it and experiment, based on that information.
I appreciate it.
Cheers
Barry
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