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Topic: A Nashville 400 Dobro Simulator? |
Paul Crawford
From:
Orlando, Fl
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Posted 17 Sep 2010 12:08 pm |
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Because all of you guys now have 112s, I got a pretty good deal on another 400. The amp looked pristine and sounded good in the living room.
Got to the gig last night and put in my standard bland setting for my effects: T+3, M-3, B+3, P+3, Shift 800, mid gains, no reverb, and found I was playing a dobro! I checked my Matchbro, which wasn't on, turned it on, and got little difference in tone. Took the Matchbro out, same tone!? Played all night sounding like a bluegrass gig.
Any ideas on what I did wrong? This amp is a newer model than my older one and does not have the LeMay mods of my older one, but still... |
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LARRY COLE
From:
LANCASTER, OHIO, USA
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Posted 17 Sep 2010 7:39 pm
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| If it has 2-12s one speaker could have the wires reversed. That would give it an out of phase sound. Not much lows and quacky like a strat in 2 or 4 position. |
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David Griffin
From:
Jimmy Creek,Arkansas via Cowtown, USA
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Posted 18 Sep 2010 1:24 am
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Did you try other amp settings?  If all your gear sounds good through another amp,the a new amp is probably the problem.Take the amp to a good repairman & have him check it out. There's a ton of difference between living room levels & gig levels,plus the fact that you have all the other instruments playng,too,on a gig.Make any sense? 
_________________
http://www.myspace.com/davidagriffin |
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Jack Stoner
From:
Kansas City, MO
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Posted 18 Sep 2010 2:05 am
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Sounds like the "good deal" wasn't really. It looks like there is a problem in the amp.
If it's a newer model it may have the factory tone mod installed. There is only one capacitor difference between the Lemay and Peavey factory mod (the extra cap in the Leamy mod affects the low end (bass)).
Larry, a Nashville 400 has one 15" speaker in it. |
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Paul Crawford
From:
Orlando, Fl
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Posted 18 Sep 2010 4:26 am
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| Jack Stoner wrote: |
Sounds like the "good deal" wasn't really. It looks like there is a problem in the amp.
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Usually isn't. But at the price I can afford the repair. 
Still looking for what I'm looking for. Shift circuit maybe? I'm not sure what a dobro effect does the wave shape but I think it kills the mids. Anyone happen to know? |
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Jack Stoner
From:
Kansas City, MO
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Posted 18 Sep 2010 5:30 am
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If you used the reverb in the 400, set the reverb control to "0" and see if it changes.
Run the Preamp Out of the 400 to the Power amp in on the Nashville 112 and see how it sounds (you may get a ground loop hum but ignore that for testing). If it is still bad that isolates it back to the preamp/EQ circuitry in the 400. If it's OK then it would appear to be a power amp or speaker problem. You can try a different speaker to eliminate that.
IC 3 (4558 op amp) is for the mid shift EQ circuit.
If it's been modified or upgraded it could have different op amps such as the OPA 2604's in it. |
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