Sounds Great! Works Great! Very Impressive!
Got a Line 6 Relay G10 yesterday. It is quite impressive! Very easy to use, compact, and sounds terrific! It is small, charges quickly, provides decent range, and seems well constructed.
I used it last night with several guitars for 5 hours without a problem. The sound and signal quality were crystal clear. I found no audible difference compared to using an instrument cable. It provided a rock solid 50' line-of-sight range. I did not try the balanced XLR jack.
Before buying, I was concerned that the Transmitter, protruding from the side jack of my Les Paul, would interfere with resting the guitar upright leaned back against a couch or placed in any of my guitar stands. Fortunately, this all worked fine! Only when seated on the couch, playing the Les Paul, did I need to be cautiously aware of the Transmitter. Even then it was not as much of a protrusion problem as I had initially thought. When plugged into the Sheraton-II Pro (top jack) the Transmitter visibly towers above the guitar, but is out of the way while playing. For both of the above fitments, it still seems that a 90° angled plug G10 version or adapter would be ideal. I also got a 3rd party angled 1/4" TS Female to Male adapter, however, it lacks the Relay G10's convenient collar switch that prevents pops, clicks, hum, etc. from being transmitted when unplugged from the guitar. Perhaps, Line 6 may introduce a 90° G10 version or a switch equipped adapter. On my Strat, the G10 fits nicely in the cradled jack plate. As I do not have the vibrato bar installed, there is no issue with the G10 impeding free positioning of the vibrato bar (as some reports depict).
The Transmitter's sensor switch automatically disconnects the signal when the unit is unplugged from the guitar. The signal resumes promptly when reinserted. Best clear signal channel selection is done when the Transmitter is plugged into the base. The Transmitter's LCD and base's illuminated halo indicates the respective status for charging, standby, channel lock, and low power.
The Transmitter comes partially charged so, charging to a full charge took less than an hour. When inserted into the Receiver/Charging Base, the Transmitter's LED blinks green indicating there is more than 30 minutes of performance in the Transmitter. When the LED reaches steady green the Transmitter is fully charged.
The Transmitter is rated for 8 hours of use and 200 hours standby. After 5 hours of use, I put the Transmitter back into the Receiver/Charging Base and it was back to solid green in less than an hour.
I did discover one quirk with the firmware! The Transmitter conveniently goes into power saving standby mode after 4 minutes of inactivity (no audio) while plugged into an instrument. However, the firmware has no similar intelligence when the Transmitter is plugged into the base and then the power to the base is shut off!? When plugged into the energized base unit, the Transmitter will always begin recharging. Even after reaching a full charge, the Transmitter remains on (steady green LED) when the base's power is turned off! This will drain the transmitter's battery (presumably after 8 hours). Until Line 6 updates the firmware, when you kill the base unit's power, you'll need to remove the Transmitter from the base. You may then reinsert the Transmitter back into the base. This seems to activate the Transmitter's 4 minute timeout shutdown (or stanby mode?), as 4 minutes later, the Transmitter's solid green LED goes dark. Line 6's very brief Pilot Guide, does not mention leaving, nor reinserting the Transmitter in the base unit with the power off. Fortunately, the doc does mention the USB jack on the base unit also serves for firmware updating. Let's see how promptly Line 6 resolves this.
The base unit comfortably sits atop my amp, and must be powered by a USB source (5v, 1Amp). The included charger block comes with easily interchangeable plug plates to accomodate various worlwide territories. Alternatively, any smaller (physically) sized USB power supply (of rated output) or a USB battery pack will suffice. I plan to use a USB battery pack to power the Relay G10 outdoors this weekend when I also use my battery powered Yamaha THR10C. I did find that the base's USB jack seemed a bit feeble. It did not exude the same rugged durable feel when connecting the USB cable as any of the other jacks on the product. Sitting atop my amp it is not too exposed, however, on a pedal board or if unplugged and replugged frequently this could be a point of failure. Time will tell.