Re: [Harp-L] getting high gain... no feedback

[MARK BURNESS <markwjburness@xxxxxxxxxxxxxx>]

No, it's just an attenuated signal at the input, the output is only hotter if 
the speakers are driven by a larger voltage, irrespective of where the volume 
knob is set, you might get a larger useful sweep on the control though, it can 
certainly help calm touchy mics, but in most cases output will not be 
significantly different, some moderate output mics & crystals may suffer poor 
dynamics in this input.

Should still get good fidelity & useability out of a lo-Z mic & transformer, can 
work with very hot dynamics/CM/CR. When I have used a SM57 for vocals through a 
tube amp, I have done what Michael describes.


 



________________________________
From: Richard Hunter <turtlehill@xxxxxxxxxxxxx>
To: harp-l@xxxxxxxxxx
Sent: Friday, 29 October, 2010 21:40:49
Subject: Re: [Harp-L] getting high gain... no feedback

Michael Easton wrote:
..."I tried something different with the Deluxe Reverb last night.  I  
don't know if it will work for the rest of you because of the polar  
pattern of your mics. Maybe with Bill's 545 and Daine's  Sennheiser.  
I used the Heumann volume pot on my SM57 and a line transformer on the  
xlr cable.  I plugged into the 2nd input on the reverb channel and  
cranked the volume to 6. This drives the amp output to play hotter.  
The 2nd input has a lower gain, so while the amp was outputting hot  
the input was lowered so as not to force the signal through the amp.

In other words I let the amp output control the volume rather then  
the strong mic input which could pick up the sound from the amp and  
cause feedback.
...
If you deal with the situation I use to have, hot mics causing you to  
keep your amp around 2 or 3, it might work better if you plug into the  
lower gain input on your amp, crank it up to around 5 or 6 and control  
everything from the mic volume pot if you have one.  I'm not sure how  
well this technique would work with wide pattern mics  but at least it  
works for narrow pattern wand mics."

Michael, I'm a little confused. Does this amp have a Master volume control, or 
is the overall volume set by the channel volume control?  If the latter, I take 
it you turned the CHANNEL volume control to 6?  If the former, what were the 
channel and master volume controls set to?

Thanks, Richard Hunter



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