Description
The GRBass AT Cube 350 is a featherweight powerhouse designed for bassists who crave portability without compromising tone. It’s part of GRBass’s Aerotech line, known for using carbon fiber to dramatically reduce weight—this combo comes in at just around 7 kg, making it one of the lightest 1×12” bass combos on the market.
Here’s a quick rundown of what it offers:
350W RMS at 4 ohms (AES standard)
1×12” speaker delivering punchy lows and articulate mids
Integrated tuner, headphone out, aux in, and DI out for versatility
Ultra-light carbon fiber cabinet for easy transport
Designed and built in Italy, with a focus on clarity and transparency in tone
It’s especially well-suited for smaller gigs, rehearsals, or players who need a grab-and-go solution without sacrificing professional-grade sound. The GR tone is often described as clean, punchy, and uncoloured—ideal for players who want their instrument’s voice to shine through.
Specifications
Power
Power Head – Power Cabinet:
350W RMS (AES Standard) – 350W 4ohm RMS (AES Standard)
Weight
AT Cube 350: 7,2 Kg – 15.9 lbs
Dimension
W40 x D35,5 x H45,5 cm
W15,75 x D13,98 x H17,91 inch
Speaker
1 x 12” Custom Jensen/Sica Woofer
Tweeter
Horn Driver 1″
ON/OFF and 3 positions switch
Frequency response
38 Hz to 18 kHz
Rear panel
– Input 230-115v (auto selectable)
– 9 Volt 300mA
– Send/Return
– Pre/Post DI
– GND lift
– DI Output
– Speakon
Fan (Studio/Live mode)
Front panel
– Tuner / Vu-Meter
– Input
– Aux In
– Gain
– Deep filter
– Low
– mid Low
– mid High
– High
– Bright filter
– 3 freq mid Low
– 3 freq mid High
– Pure Sound
– Volume DI (antibump)
– Headphone master
– Headphone output
– Master
– Mute
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