roadster channel 4 mode fault?

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slate
Bottle Rocket
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roadster channel 4 mode fault?

Post by slate » Wed Dec 14, 2011 2:51 pm

Hey y'all ,
I recently brought a used roadster head and only noticed tonight that when toggling between modes on channel 4 - using modern as the start point and reference tone - there is an enormous loss of volume , treble and prescence when switching down to vintage or raw modes .
Its like someone put a blanket over the speakers .
Channel 3 does not do this when toggling through the modes , only a slight drop in volume and gain....
Ive swapped out the preamp tubes one by one and the fault doesnt lie there , and the power tubes are a new set of winged C 34's .
Anybody any idea of the cause ?
Thanks in advance .

harem_theater
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Re: roadster channel 4 mode fault?

Post by harem_theater » Wed Dec 14, 2011 5:48 pm

This is a common problem among roadsters. We call the fault "design". :roll:

Unfortunately Mesa thought it would be awesome to have an unusually dark tone in vintage red and therefore made that mode accordingly. Some people like it. I, for one, find it irritating and definately would've preferred a clone of the orange channel modes.
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slate
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Re: roadster channel 4 mode fault?

Post by slate » Wed Dec 14, 2011 7:46 pm

Wow! I'd swear it was a fault somewhere in the channel - the difference between modes is that big . To me , that is unbelievably poor design given that the modes work so well on the other 3 channels .
Thanks for your reply !

KH Guitar Freak
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Re: roadster channel 4 mode fault?

Post by KH Guitar Freak » Wed Dec 14, 2011 8:34 pm

I'll have to give it a try on mine. It has been a while since I've played my Roadster. That being said, maybe it might not be such a fault at all, given the fact that the modes weren't designed to be switched between one another without some tweaking... :)

harem_theater
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Re: roadster channel 4 mode fault?

Post by harem_theater » Wed Dec 14, 2011 11:13 pm

It's unfortunate that this mode stands out so much because it doesn't sound consistent with the rest of the amp. The other channels are great otherwise.
Ibanez RG2120x, RG570, RG7420, RG1570, UV777bk, S5527QFX, SV5470F
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LithiumZero
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Re: roadster channel 4 mode fault?

Post by LithiumZero » Thu Dec 15, 2011 12:42 pm

If you use Raw or Vintage modes in channel 4 you have to have the presence turned up to at least 3:00 to get the same or similar tones that you get out of Channel 3 with all the same settings. In Modern mode the presence should be running fairly low to off for the best tones. I can match channels 3 & 4 pretty close by doing this. It's not really a design flaw as you can't footswitch modes anyway. Pick the mode you want to use on channel 4, adjust the presence for that mode and away you go.

slate
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Re: roadster channel 4 mode fault?

Post by slate » Thu Dec 15, 2011 1:52 pm

I really think theres a fault with mine - switch to either vintage or raw and the volume drops by at least half and the treble and presence all but disappear . Its literally like switching between a recto and a fender champ ...

LithiumZero
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Re: roadster channel 4 mode fault?

Post by LithiumZero » Thu Dec 15, 2011 2:23 pm

the volume drop is pretty normal and the lack of high end is as I already explained. Dial those modes in with your ears and not your eyes.

slate
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Re: roadster channel 4 mode fault?

Post by slate » Thu Dec 15, 2011 2:36 pm

I appreciate your replies , i really do , but in modern on channel 4 the presence on my amp needs to be at least 1 o'clock or it sounds like its got a blanket over the speakers....

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c.t.d-nicke
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Re: roadster channel 4 mode fault?

Post by c.t.d-nicke » Fri Dec 16, 2011 1:46 am

LithiumZero wrote:Dial those modes in with your ears and not your eyes.
+1
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Nazgul666
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Re: roadster channel 4 mode fault?

Post by Nazgul666 » Sat Feb 22, 2014 9:11 pm

Thread resurrection!

I just got a Roadster and have exactly the same issue. So basically the manual is a little flawed because it does lead you to believe that channel 3 and 4 are almost identical except channel 4 has higher presence.

KH Guitar Freak
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Re: roadster channel 4 mode fault?

Post by KH Guitar Freak » Mon Feb 24, 2014 6:10 am

Nazgul666 wrote:Thread resurrection!

I just got a Roadster and have exactly the same issue. So basically the manual is a little flawed because it does lead you to believe that channel 3 and 4 are almost identical except channel 4 has higher presence.
What the manual is saying isn't wrong though. When the amp is working correctly, the taper on the presence pot on channel 4 allows you to get higher overall presence than channel 3...

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mikeweber74
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Re: roadster channel 4 mode fault?

Post by mikeweber74 » Sat Mar 01, 2014 11:02 am

After reading this thread I put my channel 4 on vintage (which usually remains on modern) and I actually really like the dark vintage mode on 4!
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Chester
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Re: roadster channel 4 mode fault?

Post by Chester » Sun Mar 02, 2014 2:21 am

mikeweber74 wrote:After reading this thread I put my channel 4 on vintage (which usually remains on modern) and I actually really like the dark vintage mode on 4!
+1

I get round the "blanket over cab" issue which others find annoying by turning the global master output to 2 (of the clock), and keeping both gain and channel masters low

Opens up the amp no end
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