Buy the RE20 if you move, lean or gesture while you talk, or if guests use the microphone — its Variable-D design keeps your tone nearly constant as your distance changes. Buy the SM7B if you sit at a fixed distance, because proximity effect then becomes a tool and the voicing switches give you more control.
What Variable-D actually does
Every directional microphone exhibits proximity effect: get closer and the low frequencies rise. On a cardioid that is dramatic — the difference between four inches and twelve inches is a completely different voice. Variable-D uses multiple rear-entry ports tuned to different frequencies so that the low-frequency rise is largely canceled, which Electro-Voice describes as being virtually free of bass-boosting proximity effect at close range.
The consequence is practical, not tonal: your voice sounds the same when you lean in to read a note and when you sit back to think. If you have ever fought a take because your level and tone drifted with your posture, that is what you are buying.
Choose the RE20 if
- You move while you talk. Almost everyone does more than they think, and it shows up as inconsistent low end across a long recording.
- You share the microphone with guests whose technique you cannot direct.
- You record standing, or from a floor stand where your distance is less controlled than at a desk.
- You want the integral blast filter rather than clamping a pop filter onto your arm.
Choose the SM7B if
- You sit still at a fixed distance, in which case proximity effect is a deliberate tool for adding weight to a light voice.
- You want the presence boost switch. The RE20 has a bass tilt-down but no presence control, and the SM7B's is genuinely useful on a dull voice.
- You want the flatter, more neutral starting point that most people find more immediately flattering.
- Price matters. The RE20 costs more while being the less immediately impressive microphone on most voices.
Gain requirements: close, with a small edge to the RE20
The RE20's 1.5 mV/Pa works out at roughly -56 dBV, against the SM7B's -59.0 dBV/Pa. That is about 3 dB in the RE20's favor, which is real but does not change the category: both are low-output broadcast dynamics that want a preamp with headroom. If your interface is under 58 dB, plan for a booster with either.
Total cost of ownership
- RE20: more expensive microphone, no pop filter needed, same booster question, and a heavy body that wants a solid mount.
- SM7B: cheaper microphone, windscreen supplied, same booster question, and the voicing switches that may save you a plug-in.
Both microphones in detail
Electro-Voice RE20
Top pickElectro-Voice · Movers, leaners and anyone who cannot hold mic distance
Worth the premium if you move while you talk, gesture, or share a mic with someone whose technique you cannot control. If you sit still at a fixed distance, the SM7B's proximity effect is a feature you will use, not a problem you need engineered away.
Why it is here
- Variable-D means the tone barely changes as you drift closer to or further from the grille
- Integral blast filter handles close talking without a separate pop screen
- The bass tilt-down switch is a genuinely useful second voicing, not a gimmick
What it costs you
- Costs more than an SM7B while sounding less immediately flattering on most voices
- Same low-output problem as every broadcast dynamic
- Large and beige, which some people mind
Shure SM7B
Shure · The default upgrade, if your preamp can feed it
Buy it if your interface supplies 60 dB or more of clean gain, or if you are budgeting for a booster alongside it. Buy something else if your only interface is a Scarlett Solo and you are not prepared to add hardware.
Why it is here
- Rejects room and computer-fan noise better than any condenser at any price
- Two voicing switches let one mic cover a thin voice and a boomy one
- Internal shockmount and a yoke that actually holds position on a boom arm
What it costs you
- At -59.0 dBV/Pa it is one of the quietest mics sold, so it demands a loud preamp
- Total cost is the mic plus, very often, a booster
- Heavy enough that a cheap desk arm will droop under it
If neither: the third option
If the appeal of the RE20 was the built-in filter and the forgiving handling at a lower price, the Rode PodMic has an internal pop filter and an internal shockmount for far less — it just does not have Variable-D. The whole field is in best dynamic microphones for vocals.