What do the letters in Shure band names mean?

The letter marks the bottom of the tuning range: G starts at 470 MHz, H at 534, J at 572, K at 606, L at 626 or 632, P at 710 and Q at 470. X is the exception — X52 is the 902–928 MHz ISM band rather than a TV-band range.

Which Shure bands are still legal in the US?

The G, H and Q bands are fully legal because they stay within 470–598 MHz. J bands are usable up to 608 MHz plus the 614–616 MHz sliver, K and L bands only in narrow windows around 606–608, 614–616 and 653–663 MHz, and the P bands at 710–782 MHz are not legal at all.

What is the difference between G53, G54 and G55?

Nothing spectrally — all three cover 470–534 MHz. The two-digit number identifies the product family the band was cut for rather than a different frequency range, so a G53 and a G55 occupy the same spectrum.

Can Shure K53 or L54 gear still be used?

Only in slivers. K53 spans 606–678 MHz, of which just 606–608, 614–616 and 653–663 MHz are legal; L54 spans 632–696 MHz, of which only 653–663 MHz is legal. Everything else in those ranges is 600 MHz service band spectrum sold to mobile carriers.

Gear & blocks

Shure wireless bands: G, H, J, K, L and X explained

RF ScoutUpdated July 26, 20265 min read

Shure names its bands with a letter for the starting frequency and a number for the product family: G bands start at 470 MHz, H at 534, J at 572, K at 606, L at 626 or 632, P at 710, Q at 470 and X is the 902–928 MHz ISM band. The G, H and Q bands sit entirely inside legal US spectrum; J bands run past 608 MHz and lose everything above 616 MHz; K and L bands are legal only in narrow slivers around 606–608, 614–616 and 653–663 MHz; and the P bands at 710–782 MHz have no legal US use at all. The letter tells you the frequency, the number tells you which family the band was cut for.

Shure band names look cryptic until you notice they are just an address. The letter marks where the band starts, the two-digit number marks which product family it was cut for, and a trailing letter marks a sub-band split. Once you can read the label you can tell at a glance whether a used receiver is worth owning in the United States.

Reading the label

G: Starts at 470 MHz. G53, G54, G55, G57 and G50 all run 470–534 MHz; G56, G10 and G7 stop at 530 MHz. Entirely inside legal US spectrum.
H: Starts at 534 MHz. H50 runs 534–598 MHz. The PSM900 H7 is the outlier at 518–578 MHz. Both are fully legal.
J: Starts at 572 MHz. J52A and J50A run 572.175–615.850 MHz; J53 and J54 run 572–636 MHz. All cross 608 MHz, so part of the range is unusable.
K: Starts at 606 MHz. K53 and K54 run 606–678 MHz — almost all of it in reallocated spectrum.
L: Starts at 626 or 632 MHz. L54, L55, L56 and L50 run 632–696 MHz; L8, L9 and L10 run 626–698 MHz. Legal only across 653–663 MHz.
P: Starts at 710 MHz. P10 and P11 run 710–782 MHz, entirely inside the old 700 MHz band cleared in 2010. No legal US use.
X: Not a TV band at all. X52 is 902–928 MHz ISM, unlicensed nationwide but shared with a great deal of other traffic.

Axient Digital, ULX-D, QLX-D and SLX-D bands

Shure UHF bands for transmitters and receivers
Band	Range (MHz)	Legal US portion	Status
G50	470–534	All of it	Fully usable
G53	470–534	All of it	Fully usable
G54	470–534	All of it	Fully usable
G55	470–534	All of it	Fully usable
G56	470–530	All of it	Fully usable
G57	470–534	All of it	Fully usable
H50	534–598	All of it	Fully usable
J50A	572.175–615.850	`572.175–608` plus `614–615.85`	Usable with a notch at ch. 37
J52A	572.175–615.850	`572.175–608` plus `614–615.85`	Usable with a notch at ch. 37
J53	572–636	`572–608` plus `614–616`	Partly illegal — 617+ is carrier spectrum
J54	572–636	`572–608` plus `614–616`	Partly illegal — 617+ is carrier spectrum
K53	606–678	`606–608`, `614–616`, `653–663`	Mostly illegal
K54	606–678	`606–608`, `614–616`, `653–663`	Mostly illegal
L50	632–696	`653–663 MHz` only	Mostly illegal
L54	632–696	`653–663 MHz` only	Mostly illegal
L55	632–696	`653–663 MHz` only	Mostly illegal
L56	632–696	`653–663 MHz` only	Mostly illegal
X52	902–928	All of it	Legal, unprotected — 900 MHz ISM

PSM in-ear bands

IEM transmitters sit on the same spectrum map as everything else, and they are frequently the forgotten half of a coordination. A PSM pack in a band that no longer exists legally is the same problem as a mic in one.

Shure PSM1000 and PSM900 bands
Band	Family	Range (MHz)	Legal US portion	Status
G10	PSM1000	470–530	All of it	Fully usable
Q10	PSM1000	470–542	All of it	Fully usable
L8	PSM1000	626–698	`653–663 MHz` only	Mostly illegal
L9	PSM1000	626–698	`653–663 MHz` only	Mostly illegal
L10	PSM1000	626–698	`653–663 MHz` only	Mostly illegal
P10	PSM1000	710–782	None	Illegal in the US
P11	PSM1000	710–782	None	Illegal in the US
G7	PSM900	470–530	All of it	Fully usable
H7	PSM900	518–578	All of it	Fully usable
J7	PSM900	554–626	`554–608` plus `614–616`	Partly illegal above 617

What the wide bands buy you

The 64 MHz bands — G53, H50, J53 and their siblings — cover roughly two and a half times what a 25.5 MHz block does. That matters most when the same package has to work in more than one city, because a wide band lets you slide the whole plot away from an occupied TV channel instead of renting different gear. The catch is that a wide band crossing 608 MHz is not as wide as it looks: J53 advertises 572–636 MHz and delivers 36 MHz of legal tuning plus a 2 MHz sliver.

Shure was also first to market with a WMAS product, the Axient Digital PSM announced in October 2024, using the wideband device class the FCC authorized in FCC 24-22. That is a different way of dividing the same spectrum rather than new spectrum — WMAS explained covers what it changes and what it does not.

Buying and renting

G and H bands are the safe purchase. 470–598 MHz is legal in every US market, and the only question left is local TV occupancy.
J bands are a good deal if you price them for their legal half. 572–608 MHz is genuinely useful spectrum; the range printed on the box is not what you get.
K, L and P bands should be treated as export or parts stock. 47 CFR §74.851(j) bars manufacture and sale of gear tuned to the 600 MHz service band and guard bands, with a narrow carve-out for 653–657 MHz.
X52 at `902–928 MHz` is a genuinely different tool. Legal nationwide with no license, no interference protection, and a lot of neighbours — see working above 700 MHz.

Whatever letter is on the label, the operative question at call time is which TV channels inside that range are occupied at the address. Start with scanning and walk testing, and if you are running a full bag see coordinating frequencies in a multichannel bag.

Enter an address and see how much room your Shure bands actually have there.

Check a band against a location

Common questions

What do the letters in Shure band names mean?: The letter marks the bottom of the tuning range: G starts at 470 MHz, H at 534, J at 572, K at 606, L at 626 or 632, P at 710 and Q at 470. X is the exception — X52 is the 902–928 MHz ISM band rather than a TV-band range.
Which Shure bands are still legal in the US?: The G, H and Q bands are fully legal because they stay within 470–598 MHz. J bands are usable up to 608 MHz plus the 614–616 MHz sliver, K and L bands only in narrow windows around 606–608, 614–616 and 653–663 MHz, and the P bands at 710–782 MHz are not legal at all.
What is the difference between G53, G54 and G55?: Nothing spectrally — all three cover 470–534 MHz. The two-digit number identifies the product family the band was cut for rather than a different frequency range, so a G53 and a G55 occupy the same spectrum.
Can Shure K53 or L54 gear still be used?: Only in slivers. K53 spans 606–678 MHz, of which just 606–608, 614–616 and 653–663 MHz are legal; L54 spans 632–696 MHz, of which only 653–663 MHz is legal. Everything else in those ranges is 600 MHz service band spectrum sold to mobile carriers.

Sources

Related notes

Field Notes are general reference, not legal advice or a substitute for the rule text. Spectrum rules change; verify anything you are relying on against the current source before you transmit. See the methodology and disclaimer.