Amp mic placement for recording: what do you do?

Kosh Naranek

New member
I've been experimenting with using two mics to record a guitar cab. One dynamic mic like a Sennheiser e609 or Shure SM57 to close mic the speaker, and a small diaphragm condenser a couple of feet back. I really like the sound that the condenser adds. It's more natural. More like what you hear standing in the room in front of the amp. No one puts their ear right up to the speaker, where the dynamic mics are placed.

When combining the two tracks, I get phase cancellation problems. Sometimes it's passable, other times it cancels out so much that I can only use one of the tracks.

Do any of you do this often and have a system that works real well? I'm trying to save some time experimenting with a million different mic placements before I find a few that sound great.

Another thing I've tried that has worked real well is mic'ing the amp with two dynamic mics that have different responses. My Stedman N90 studio dynamic mic has a flatter response and smoother top end, but beefier mids. The SM57 has a presence peak so the top end sparkles, but the mids sound thin. Using both, I get a bigger guitar tone that has sizzle on top, chunk in the mids, and sounds much fuller than just using an SM57 alone. I've used this approach with an amp head connected to two speaker cabs - one open back, one closed back, one with an 80's Celestion Classic Lead speaker, the other with a pair of Vintage 30's, so each mic is capturing a slightly different tone. Again, when the two are blended, the guitar sounds bigger than it would with one mic picking up one speaker.

Anyone have any tips for distance mic'ing with the condenser mic?
 
Re: Amp mic placement for recording: what do you do?

When combining the two tracks, I get phase cancellation problems. Sometimes it's passable, other times it cancels out so much that I can only use one of the tracks.

What happens if you reverse the phase of one of the mic inputs?




Cheers..................................wahwah
 
Re: Amp mic placement for recording: what do you do?

What happens if you reverse the phase of one of the mic inputs?
It's still out of phase. Usually it sounds worse. The signals are between 0 and 180 deg out of phase so reversing one by 180 still makes it out of phase.

One thing I haven't tried is eyeballing the waveforms in Cubase SX and sliding one track forward or back so the waveforms line up with the other. Gotta try that tonight if I get time to.

For many years I recorded direct cuz I lived in apartments and a condo. One reason I got a house last summer was to have more room for the studio and to be able to mic cranked amps. I'm still finding out how to get the best results.
 
Re: Amp mic placement for recording: what do you do?

I really like the way a condenser sounds when it's about 6-8 feet away, and around 6 feet high...if you have an angled 4x12, this is about where you would hear the top speakers on a sizable stage, so it's really nice to blend in with the close sound.

I use either an AKG C-3000 or an Octava MK-319, which are the only large ones I have. Sometimes I use two condensers...one of the others in the back, and an Octava MK-012-01 to close mic the speaker.
 
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Re: Amp mic placement for recording: what do you do?

I really like the way a condenser sounds when it's about 6-8 feet away, and around 6 feet high...
Thanks. I was putting the condenser probably half that far away. I'll try further back and higher up (off axis).
 
Re: Amp mic placement for recording: what do you do?

It's to approximate where your ears would be in a live situation on decent size stage.
 
Re: Amp mic placement for recording: what do you do?

I looked at the two guitar tracks for the guitar part in one song I recorded a couple of weeks ago, with a close mic and the second track distance mic'ed with a condenser. It was impossible to really line those waveforms up. They look totally different. And that's not surprising listening to them. The dynamic mic I was using was a Stedman N90 which picks up a lot of thump and the chunk in the low mids but has a smooth high end. The condenser was picking up all the sizzle at the top. I put them back where they were.

I've got another part I wanna track tonight. I'll try the condenser + dynamic close mic, with the condenser about 6 ft back.

What you say makes sense, guitfiddle. We set the tone controls on the amp so it sounds good when we're standing up, playing maybe 5-15 feet in front of the amp. To capture that tone, the condenser needs to be somewhere in that area.
 
Re: Amp mic placement for recording: what do you do?

that's right, and if you let the SM57 do it's mid-range mojo like it always does, you can then EQ the condenser's frequencies to "fit around" what the 57 is giving you.
 
Re: Amp mic placement for recording: what do you do?

Nothing fancy for me, just put my Shure SM-57 about 9" to 10" back from the speaker, off center at an angle. Works like a charm.
 
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