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G10T/G10TII LED States:


Green when in guitar: On
Red flashing when in guitar: Less than 30 minutes battery life left


Green when docked: Fully charged
Green flashing when docked: Charging
Red flashing when docked: Less than 30 minutes battery life left and charging


White solid: On and connected to G10 transmitter OR charging docked G10 transmitter
White flashing: No signal from G10 transmitter
Red flashing: Less than 30 minutes battery life left on a transmitter that is in use and transmitting, and not for a transmitter that is docked/charging. It is possible that the receiver's LED halo will flash red under other conditions, such as if the transmitter is not properly docked.


Q: What is different between the original G10T and the new G10TII transmitters?

A: The most obvious difference may be that the original G10T is black in color, while the new G10TII is dark grey. The new G10TII also incorporates new battery management technology, resulting in up to 7 hours of runtime and 170 hours of standby time, compared with the original G10T on the latest version 1.06 firmware, with up to 6 hours of runtime and 150 hours of standby time. Additionally, the new G10TII is electrically compatible with instruments using active pickups and preamps, without the need for an adapter.


Q: My G10T/G10TII transmitter was fully charged, but my G10S is now at a single red LED and I have not played for very long. What happened?

A: If, after a full charge, the LEDs drop to a single red LED sooner than expected, the transmitter may continue to operate for a number of hours, depending on the condition of the battery. While variation exists between batteries, a red blinking LED will generally indicate 30 minutes or less of play time.



Q. Why is my docked transmitter flashing green when I know it's fully charged?

A. Once a transmitter reaches full charge when docked, the transmitter will begin to discharge at a trickle. Eventually, the transmitter will dip down to a threshold at which it charges again. At that point, the LED may begin to flash, indicating charging. This could be noticeable for a few seconds, or potentially longer, depending on the condition of the battery.


Just as there will be variation from unit to unit with regard to battery performance, you may observe the interval at which that flashing occurs may vary from unit to unit. Transmitters that have been through many cycles or that have problematic batteries could have a diminished performance and might now be much closer to dipping down into that threshold when they trickle upon full charge, which could make that flashing LED state occur more frequently, where it might be more readily observable in those cases.


Q: I inserted the transmitter into the receiver and let it charge for many hours, but the transmitter never fully charged. The transmitter and the receiver is constantly blinking red. Why?
A: In some cases, the transmitter could stand to be updated using the Line 6 Updater program found at www.Line6.com/software.
Please make sure you are using the latest version of Line 6 Updater. Otherwise, there's a chance that the transmitter was not seated completely into the receiver to start the charging process. Once the transmitter is correctly seated in the receiver, the receiver's LED halo will be a solid white, and the transmitter LED will flash green until fully charged, at which point the transmitter LED will be solid green. Please see the images below for examples.


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Here is a video that illustrates LED statuses:


Q: How long does it take to charge the battery?
A: On average, a new transmitter with its battery in a discharged state has given the following results when tested:

  • 15 minutes of charging gives at least 30 minutes of run time
  • 30 minutes of charging gives nearly 1 hours of run time
  • 3 hours of charging (full charge) gives approximately 6 hours of run time for G10T, or 7 hours of run time for G10TII


All rechargeable batteries gradually lose capacity, so eventually the run times will decrease.

Q: Should I leave my fully-charged G10 transmitter in the receiver?
A: The unit is designed for the transmitter to be plugged into the receiver to stay charged. Think of this much like you would a cordless phone. Always keep it docked if you can for good battery life. Not being docked will not damage the battery nor accelerate drainage.

Q: What is the lifespan of the battery?
A: After 300 full charging cycles, expect the battery to gradually lose capacity, the amount of which varies.


Please keep in mind that there are many factors that can affect these numbers, such as temperature, humidity, etc. but not enough to significantly shorten the life span of the battery.


Q: Does the G10T/G10TII transmitter fit all guitars?
A: We have designed the G10 and G10TII transmitters to fit into almost any guitar. However, we anticipate that there will be some rare cases where the transmitter does not fit into a given guitar. If the G10 or G10TII transmitter is inserted into your guitar and the transmitter's actuator pin is not engaged, the transmitter will not turn on, the LED on the transmitter will not light up, and no signal is processed.


We have found that a workaround to this issue is to use a mono-to-mono (TS-TS) Male to Female adaptor or cable. See this article for more details: Relay G10 Guitar Compatibility (Fit/Electronics)


Q: Does the G10/G10TII transmitter work with older Variax guitars?
A: Yes, but the fit is not exact. Please see this article for more details: Relay G10 compatibility with older Variax models


Q: Does the G10 transmitter work with guitars that use active electronics?
A: In some rare cases, the guitar's active electronics are wired with inverse polarity. In this scenario, the original G10TII transmitter's electronics can go into a protection mode that keeps the system from being functional. This is evidenced by no output from the receiver, even though the transmitter's light is on. The new G10TII is designed to be electrically compatible with instruments using active pickups and preamps, without the need for an adapter.


Additionally, certain instruments may present a level of noise when their active circuitry is engaged and the transmitter is connected. We have found that in most cases, a workaround to this issue is to use a mono-to-mono (TS-TS) Male to Female adaptor or cable. See this article for more details: Relay G10 Guitar Compatibility (Fit/Electronics)


Q: Does the G10/G10S system work with instruments other than guitar?
A: We developed and tested G10 and G10Sfor guitar and bass, but in theory, these products will work with any instrument-level source. This is not to say that it will work with any instrument you try it with, based on the above guitar-compatibility answers, but we expect that most will find success, so you are welcome to try.


Q: If you leave the transmitter plugged into a guitar, does it still use up battery life even if it's not being used?
A: After 4 minutes of silence, the transmitter will go into sleep mode, and will come back on when audio is passed through it again.


Q: I have a guitar with active pick-ups. Can I leave the transmitter plugged in without the guitar battery dying?
A: The experience should not be any different than leaving a guitar cable plugged into the guitar, meaning the G10T or G10TII will shut off in four minutes if it doesn't detect a signal. We suggest turning your guitar down to 0 when not in use, as some guitars, even those without active pick-ups, can produce enough hum or noise to trick the transmitter into staying turned on. Note that with certain guitars that have active electronics, leaving a cable plugged in might drain the guitar's battery, so the same may happen with a G10T or G10TII left in the guitar.


Q: What is the maximum input / output level for the Relay G10 and G10S?

A: The G10T/G10TII transmitter's maximum input level is 6.5 Vpp (= 9.5 dBu). The outputs on the receivers are at unity, so they are the same.


Q: What is the dynamic range for the Relay G10 and G10S?

A: Both products feature a dynamic range of greater than 110 dBA when used with either the G10T or G10TII transmitter.


Q: What is the frequency response for the Relay G10 and G10S?

A: Both products have a response of 10 Hz - 20 kHz when used with either the G10T or G10TII transmitter.


Q: What is the amount of latency for the Relay G10 and G10S?

A: Both products have approximately 2.8 milliseconds of latency from input to output, when used with either the G10T or G10TII transmitter.


Q: What is the input impedance for the G10T/G10TII?

A: Greater than 1 MΩ for both transmitters.


Q: What are the specs on the provided Relay G10 and G10S power supplies?
A: For Relay G10: 5V 1.0A output, input of 100-240v. The Relay G10S includes the DC-1g, which is a 9V DC 0.5A output, input of 100-240v.


Q: Will phantom power harm the G10 or G10S receiver?
A: No, the receivers will not be harmed by phantom power.


Q: At what temperatures can I charge my G10T/G10TII transmitter?

A: The recommended charging temperature range of the G10T and G10TII transmitters is specified as 50° F to 86° F (10° C to 30° C).


Q: At what temperatures can I operate my G10T/G10TII transmitter?

A: The recommended operating temperature range of the G10T and G10TII transmitters is specified as 32° F to 122° F (0° C to 50° C).


Q: What are the specs on the provided Relay G10 Series power supply?
A: 5V 1.0A output, input of 100-240v


Q: Will phantom power harm the G10 receiver?
A: No, the G10 receiver will not be harmed by phantom power.


Q: Where can I purchase a Relay G10 Series Wireless System or replacement/extra Relay G10 transmitters (G10T)?
A: You can order them from any authorized dealer.


Q: What type of cable do I need between my guitar & G10T/G10TII transmitter?
A: None; it plugs directly into your guitar.


Q: Can I use both the 1/4" output and the XLR output at the same time?
A: Yes, they can both be used simultaneously.


Q: What Cable Tone length is the G10/G10S set to?
A: G10's Cable Tone is set to 10 feet on the 1/4" output only. The XLR output is full frequency range. These settings are not configurable. For the G10S, Cable Tone is switchable between Off (full frequency), 10 feet, and 30 feet.


Q: What is the range of the G10/G10S?
A: The G10 is 50 feet, line of sight, as local conditions allow. The G10S is 130 feet.


Line of sight: As with our other wireless gear, be sure to have a visible line of sight with the receiver. To get the best performance out of the G10 or G10S, do not obstruct the receiver with other gear or electronics.


Q: How does G10/G10S/G10T/G10TII interact with other wireless devices?
A: If you are using G10/G10S/G10T/G10TII in a setup with other 2.4 GHz wireless devices, please make sure to switch on all other wireless devices first, allow them to initialize and set channels, then dock the G10T or G10TII transmitter into the receiver for at least 15 seconds so the system can select a free channel.


When using several G10 or G10S systems, please start by docking the first transmitter in the receiver, wait 15 seconds, undock it and plug it into your instrument. Please make sure that it is on (green LED on the transmitter). Repeat this process with the subsequent units.


Many Line 6 wireless devices can be set to different RF modes. All Line 6 wireless units in a setup need to utilize the same RF mode to avoid problems. Your G10/G10S/G10T/G10TII unit is always set to RF2, so make sure that any other Line 6 wireless devices in your setup are set to RF 2 mode.


G70/75 units use RF3, which can coexist with RF2 for G10/G10S/G10T/G10TII , so long as you avoid using the same channel between them. Here's an article that shows how to switch RF modes:




Q: Is the Relay G10/G10S transmitter (G10T/G10TII) compatible with the X2 receiver (or vice versa)?
A: Both systems run in completely different frequency ranges so they are not compatible with each other. However, X2 and Relay units can be used on the same stage (along with any other analog wireless systems) with no problems.


Q: Does USB 3.0 create interference in the 2.4GHz frequency range?
A : USB 3.0 computer cables and peripherals, including hard drives, are known to emit radio frequency interference throughout the 2.4GHz band, which results in reduced range and/or performance for any 2.4GHz device in its proximity (including wireless keyboard or mouse, WiFi, etc.). We recommend placing any digital wireless receivers at least two meters away from the USB 3.0 device and its cabling.


Below is a link to a study by Intel regarding this interference.


Q: How do I register my Relay G10/G10S/G10T/G10TII System?
A: You can register on your account:


Gear Registration


Dimensions - G10
Receiver: H 3.5"; W 4"; L 4"
Transmitter: 2" long after inserted into instrument
Total boxed weight: 3 lbs.


Dimensions - G10S
Receiver: H 2"; W 3.5"; L 5"
Transmitter: 2" long after inserted into instrument
Total boxed weight: 4 lbs.


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