The GRBass AT Cube 800 (SL) is a professional bass combo amplifier featuring a 12-inch speaker configuration and 800W RMS power output. This compact yet powerful amplifier combines exceptional portability with distinctive GR sound quality, making it suitable for various performance situations. With dimensions of 40 cm width, 35 cm depth, and 43 cm height, and weighing only 8.2 kg, this amplifier offers remarkable transportability without compromising on audio performance.

The amplifier incorporates a 500W RMS cabinet power rating and utilizes a custom 12-inch Jensen/Sica woofer with horn driver and tweeter, delivering a frequency response range from 38Hz to 18 kHz. The front panel provides comprehensive control options including input gain, four-band EQ with low, mid low, mid high, and high frequency adjustments, deep filter, bright filter, and three-position frequency selectors for mid low and mid high ranges.

Additional features include a built-in tuner with VU meter, auxiliary input, Pure Sound function, and dedicated headphone output with anti-bump volume control. The rear panel offers extensive connectivity options including send/return jacks, pre/post DI selection, DI output with ground lift, Speakon connector, and automatic voltage selection between 230V and 115V.

The bass reflex design on the rear panel enhances low-frequency response, while the 99 dB SPL sensitivity ensures efficient power utilization. The 8 ohm speaker impedance allows for easy expansion with additional cabinets to fully utilize the 800W power capability. The amplifier includes a cooling fan with Studio/Live mode selection and master volume control with mute function. This bass combo amplifier represents a practical solution for musicians seeking reliable performance, durable construction, and professional-grade features in a lightweight, portable package.