Lectrosonics Block 21wireless mic block coverage
537.6–563.1 MHz25.5 MHz tuning range
TV channels overlapping this block
ch.25ch.26ch.27ch.28ch.29
DTV stations on these RF channels are the primary interference sources for mics in this block.
Nationwide coverage map — Lectrosonics Block 21
Predicted RF congestion at 1.5° grid points across the contiguous US. Green = lower interference, red = heavier congestion from nearby DTV stations. Based on FCC seed data; verify with on-location scan.
Best US markets for this block
| # | Market | Status |
|---|---|---|
| 1 | Baltimore | Recommended |
| 2 | Hartford–New Haven | Recommended |
| 3 | Columbus, OH | Recommended |
| 4 | Milwaukee | Recommended |
| 5 | Cincinnati | Recommended |
| 6 | West Palm Beach–Ft. Pierce | Recommended |
| 7 | Greenville–Spartanburg–Asheville | Recommended |
| 8 | Oklahoma City | Recommended |
| 9 | Harrisburg–York–Lancaster | Recommended |
| 10 | Birmingham | Recommended |
| 11 | Norfolk–Virginia Beach | Recommended |
| 12 | Albuquerque–Santa Fe | Recommended |
| 13 | Louisville | Recommended |
| 14 | Memphis | Recommended |
| 15 | Providence–New Bedford | Recommended |
| 16 | Fresno–Visalia | Recommended |
| 17 | Denver | Recommended |
| 18 | Detroit | Recommended |
| 19 | Sacramento | Recommended |
| 20 | Houston | Recommended |
Most congested markets for this block
| # | Market | Status |
|---|---|---|
| 1 | Kansas City | Avoid |
| 2 | San Francisco Bay Area | Avoid |
| 3 | Chicago | Avoid |
| 4 | New York | Avoid |
| 5 | Raleigh–Durham | Avoid |
| 6 | Portland, OR | Avoid |
| 7 | Phoenix | Avoid |
| 8 | Indianapolis | Avoid |
| 9 | St. Louis | Avoid |
| 10 | Nashville | Avoid |
Compatible Lectrosonics models
DSQDRXDCR822RXDSR4RXDBuTXSRcRXDCHTTXDPRTX
Score your address with Lectrosonics Block 21
Enter your shoot location to see how this block performs at your exact position — RF Scout will highlight which TV channels are active nearby and whether your block is usable.