Gr Bass CUBE 500 BLK
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Information
Information
Manufacturer Information
Gr Bass
https://www.grbass.com
info@grbass.com
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Safety manager:
IMS Distribution
Email: contact@ims-distribution.com
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Historical Context and Positioning in the Range
The Cube 500 BLK belongs to the GR Bass combo family focused on lightweight and power, designed to deliver precise and modern sound without transport hassle. In a series available in several power ratings (350, 500, 800), this 500 W version aims for an ideal balance between volume headroom, versatility, and portability.
Who This Amp Is For
This combo is tailored for intermediate to advanced bassists seeking a reliable amp for rehearsals, studio, and concerts, with the option to feed a PA system via the DI. Its 1 x 12-inch format suits styles requiring solid low end and clear mix presence: pop, rock, funk, fusion, and jazz. The headphone output and auxiliary input also make it an excellent tool for home practice.
Features and Innovations
The GR Bass Cube 500 BLK offers quick handling with Gain and Master controls, complemented by a precise and musical 4-band EQ. The mids are particularly flexible thanks to 3 frequency positions for both Mid-low and Mid-high, allowing adjustment of the bass's place in the mix depending on the instrument, playing style (fingers, slap, pick), and cabinet. It also includes a Deep Filter to thicken the low spectrum, an effects loop (Send/Return) for pedals, an adjustable DI with Pre/Post switch and GND lift, as well as a mute switch. The fan features a Studio/Live mode to balance silence and cooling.
Sound
The Cube 500 BLK targets lovers of modern and defined tones, with a clear attack and well-controlled low end, typical of current transistor bass amplification. The 12-inch neodymium speaker delivers punch and solid foundation, while the tweeter (adjustable in 3 positions) allows switching from a softer high end to a brighter sound, ideal for slap, harmonics, and highly articulated tones. The extended EQ and Deep Filter enable a range from a wide, clean sound to a denser, "mix-ready" tone, all while maintaining excellent note clarity.
Technical specifications
| Category | Bass combo |
| Technology | Solid state |
| Effects loop | Yes |
| Cabinet impedance (Ω) | 8 Ω |
| Category | Amplifier |
| Speaker diameter | 12" |
| Number of speakers | 1 |
| EQ | 4 channels |
| Headphone output | Yes |
| Color | Black |
| Power output | 500 W |
| Amplifier power | 500 W RMS |
| Woofer | 1 x 12-inch neodymium |
| Tweeter | 1 inch with 3-level adjustment |
| Bass reflex output | rear |
| Impedance | 8 Ohms |
| Frequency response | 38 Hz to 18 kHz |
| Sensitivity | 98 dB |
| Controls | Master volume, Gain, Deep Filter |
| Equalization | 4-band EQ with 3 Mid-low positions and 3 Mid-high positions |
| Inputs | 6.35 mm Jack, 3.5 mm Aux |
| DI output | adjustable |
| Accessory power supply | 9 V DC 300 mA output |
| DI switch | Pre/Post |
| Switch | GND lift |
| External speaker output | Speakon |
| Length | 400 mm |
| Width | 355 mm |
| Height | 430 mm |
| Weight | 13,000 g |
Questions frequently asked
Is the GR Bass Cube 500 BLK suitable for rehearsals and gigs?
With its 500 W and 12-inch neodymium speaker, this combo offers enough volume headroom for rehearsals and gigs. The adjustable DI output allows connection to a PA system.
What connectivity does this GR Bass bass combo offer?
The instrument input is a 6.35 mm jack and there is a 3.5 mm mini-jack auxiliary input. A Send/Return effects loop, adjustable headphone output, and Speakon speaker output complete the connectivity. A 9 V DC 300 mA power supply is also available for accessories.
Can one practice silently with headphones using the Cube 500 BLK?
The adjustable headphone output enables silent practice, with a dedicated mute switch.
How to adjust the sound and mids on this amp?
The 4-band EQ includes three frequency settings for Mid-low and three for Mid-high. The Deep Filter thickens the low end, while the 1-inch tweeter has three level settings. The specified frequency response ranges from 38 Hz to 18 kHz.
Is the combo easy to transport?
Its dimensions of 400 × 355 × 430 mm and weight of 13 kg limit its bulk. The cabinet features a single 12-inch neodymium woofer with a rear bass-reflex port.
