Fat Bass Tone
AT CUBE 350-24
350W RMS AMPLIFIER WITH 350W 4-OHM 1X12 CABINET
CARBON FIBER CONSTRUCTION — JUST 17.64 LBS
BUILT-IN TUNER, HEADPHONE OUTPUT & AUX INPUT
FOUR-BAND EQ, BALANCED DI & EFFECTS LOOP
EXPERT TECHNICAL SUPPORT
IN STOCK MEANS IN STOCK
The GR Bass AT CUBE 350 delivers the clarity and responsiveness of GR Bass amplification in an exceptionally lightweight carbon fiber combo. With a 350W RMS amplifier, custom 12-inch Jensen/Sica speaker, and adjustable horn tweeter, it offers a complete bass rig weighing just 17.64 pounds. For players who value portability, clean sound, and practical features, the AT CUBE 350 is an excellent choice for rehearsals, smaller gigs, studio sessions, and everyday practice.
Despite its compact dimensions, the AT CUBE 350 offers the controls you'd expect from a full-featured bass amplifier. Four-band EQ, selectable midrange frequencies, Deep and Bright filters, an onboard tuner, balanced DI, effects loop, headphone output, and auxiliary input make it easy to move between practice, recording, and performance without changing your core setup.
The GR Bass AeroTech concept combines lightweight carbon fiber cabinet construction with the company's Pure Sound amplification approach. The AT CUBE 350 brings that philosophy into a compact 1x12 combo designed to provide a natural representation of your instrument with convenient controls and connectivity.
Gain & Master: Independent input gain and overall output volume controls.
Four-Band EQ: Low, Mid Low, Mid High, and High controls, with three selectable frequency settings for each midrange band.
Deep & Bright Filters: Add low-frequency weight or extra high-frequency presence when needed.
Pure Sound: Provides a more direct tonal response with minimal EQ coloration.
Onboard Tuner / VU Meter: Convenient tuning and input-level indication.
Headphone Output & Aux Input: Support private practice and playing along with external audio.
DI Output: Balanced output with pre/post selection, ground lift, and dedicated DI volume.
Effects Loop: Send and return connections for external processors.
Amplifier Output: 350W RMS at 4 Ohms
Internal Cabinet: 4 Ohms
The included 4-ohm cabinet matches the amplifier's rated load, allowing the combo to operate at its specified 350W RMS output rating.
Important: Because the internal speaker system is already rated at 4 ohms, do not assume an additional passive extension cabinet can be connected safely while the internal cabinet remains connected. Confirm the manufacturer's permitted load and connection arrangement first.
Woofer: 1 x 12" Custom Jensen/Sica
Cabinet Power Handling: 350W RMS (AES)
Tweeter: 1" Horn Driver
Tweeter Control: On/off and three-position adjustment
Bass Reflex: Rear Ported
Frequency Response: 38 Hz–18 kHz
Sensitivity: 98 dB SPL
Manufacturer: GR Bass
Model: AT CUBE 350-24
Type: Carbon Fiber Bass Combo Amplifier
Amplifier Output: 350W RMS at 4 Ohms
Speaker Cabinet: 1x12", 350W RMS, 4 Ohms
Weight: 8 kg / 17.64 lbs
Dimensions (W x D x H): 15.75" x 13.98" x 17.91"
Input Voltage: 115V / 230V, automatic selection
Front Panel: Tuner/VU Meter, Gain, Deep, Four-Band EQ, Bright, Midrange Frequency Selectors, Pure Sound, DI Level, Headphone Level, Master, Mute
Rear Panel: DI Output, Pre/Post DI, Ground Lift, Effects Send/Return, Speakon Speaker Output, 9V 300mA Output, Fan Studio/Live Mode