Destin
8 posts
Mar 22, 2012
10:31 PM
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I just bought a 1949 supro with 2 6x9"S in it.
All the way up it's just barely starting to break up.
Anyone have any suggestions on what I should use to get a little more gain?
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SuperBee
157 posts
Mar 22, 2012
11:44 PM
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What is your signal source? Hi z, lo z?
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Moon Cat
42 posts
Mar 23, 2012
12:30 AM
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I really like this pedal ( LONE WOLF HARP BREAK) here for getting a little or a lot more grit, compression and bass boost out of an amp with a bit too much headroom. The Kinder AFB does this by default as well however this pedal has the a lot more control over the above listed effect as it was designed for those specific applications. Check it out Ive been using mine at every gig and session I go to these days since Im never using the same amp and still dont have my own. Its been an amazing tool and very dependable I feel pretty safe with strange rigs that use to scare me as long as I have ten minutes or so to play the pedal against the amp and vice versa till there both happy.
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Moon Cat
43 posts
Mar 23, 2012
12:30 AM
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oh congrats on the Supro!
Jason
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Willspear
96 posts
Mar 23, 2012
1:14 AM
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yeah the harp break is one of the best things ever to just get the amp to nudge from dull to tone city
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5F6H
1111 posts
Mar 23, 2012
2:33 AM
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Destin,
What mic are you using? How many power tubes does the amp have?
If you are using a hi-z mic, or a lo-z mic with an impedance transformer, into a push-pull amp (2 power tubes) you should be getting feedback long before maxing out the volume control. It's posible that you need someone to look at the amp in the first instance, rather than a gain boost pedal.
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www.myspace.com/markburness
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Destin
10 posts
Mar 23, 2012
10:21 AM
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I have been using lo-z mics lately , I heard that the gain difference on a hi-z mic is not much difference. I have been using a xlr to quarter inch cable, should I try the transformer? would that give me the gain of a hi a hi-z mic?
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Willspear
98 posts
Mar 23, 2012
10:26 AM
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Transformer is a must.
The output is dramatically different.
Low z mic not matched to a high impedance device sounds dead
Last Edited by on Mar 23, 2012 10:29 AM
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Elvis
2 posts
Mar 23, 2012
1:11 PM
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You can try MXR Microamp. Nice boost pedal with volume control only :)
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MP
2117 posts
Mar 23, 2012
2:14 PM
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Destin,
"Transformer is a must." as Will pointed out. either that or use a highZ mic.
my second amp was a 1/10 Supro. i loved it! i got it
after my first amp, a Kalamazoo died.
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MP
doctor of semiotics and reed replacement.
"making the world a better place, one harmonica at a time"
Last Edited by on Mar 23, 2012 2:15 PM
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SuperBee
163 posts
Mar 23, 2012
2:33 PM
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Go hi z and see whether you think there's much difference. I'll bet you do. I'll pay odds.
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billy_shines
289 posts
Mar 23, 2012
3:15 PM
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try a preamp on a crystal mic.
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rbeetsme
703 posts
Mar 23, 2012
3:57 PM
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With that Supro and a good Shure Hi Z element (such as a CM99A86) you should be as loud as you want at about 4 on the volume. If you have a good volume control on the mic, you can use the volume to control the gain on the mic. I often set the amp volume to about 5 or 6 and adjust the volume on the mic to just below feedback level. This works with nearly all of my small amps.
If you can't find your sound in that amp, I'll be glad to take it off your hands!
Last Edited by on Mar 23, 2012 4:00 PM
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Greg Heumann
1547 posts
Mar 23, 2012
7:01 PM
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It has already been said - but I will re-emphasisze - your problem is using a low impedance mic set up for balanced wiring with a high impedance cable set up for unbalanced wiring.
Just because you can connect stuff together doesn't mean it is correct - and this is the prime (and very common) example. Believe it or not, the impedance mismatch is the LESSER of the two things wrong at play here. The big problem is that your microphone expects a balanced cable (with TWO wires inside the shield.) The mic puts its signal out on pins 2 and 3, neither of which is connected to ground (which is the cable's shield.) The signal "floats" so that its zero point is not necessarily = to "true 0" that your ground is. The cable you are using, however, is unbalanced (with ONE wire inside the shield.) It connects to EITHER pin 2 or Pin 3 but not both, and uses the cable shield for the signal return path. That means you're getting half of the mic's actual output. That in turn isn't driving your amp's preamp hard enough.
Get that mic properly wired to the amp (low-Z, balanced cable - i.e., XLR at both ends, together with an impedance matching transformer) - and then decide if you need to do anything else.
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/Greg
Last Edited by on Mar 23, 2012 7:06 PM
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nacoran
5440 posts
Mar 23, 2012
9:13 PM
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Greg, for us less technically inclined, how do you tell them apart. (Some days my light switch confuses me!)
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Nate
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Greg Heumann
1549 posts
Mar 23, 2012
10:13 PM
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You can't tell whether a mic is high or low by looking. You CAN tell if a high impedance mic is wired pin 2 hot or pin 3 hot by pulling the connector out - a wire will only be connected to one pin or the other. This is NOT true of dual impedance mics like the Shure 545 - however you can still figure it all out with a little investigation.
ANY mic with a crystal or ceramic element is high impedance for sure.
The vast majority of microphones with XLR connectors, especially anything whose production began in the last 20 years - are low impedance mics.
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/Greg
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Destin
11 posts
Mar 24, 2012
10:58 AM
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Wow thanks everybody, Greg now that I have my amp I will be contacting you soon to buy my mic, I'm just still debating on which one to get, I really like Adam's tone so I looked up the specs on the shure pe5h but it had a crazy boost on it nothing like I have ever seen on any other mics, so I think I'm gonna just order the 57 from you, still trying to make up my mind though.
Last Edited by on Mar 24, 2012 10:59 AM
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