Gr Bass GR 212 SLIM-4 BLK
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Information
Information
Manufacturer Information
Gr Bass
https://www.grbass.com
info@grbass.com
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IMS Distribution
Email: contact@ims-distribution.com
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Historical Context and Positioning in the Range
The 2x12 format has established itself as a highly appreciated alternative between the compactness of a 1x12 and the authority of a 4x10: it offers a serious foundation in the low spectrum while maintaining a rounder and more "musical" response than some formats heavily focused on attack. With its 900W RMS power and adjustable tweeter, this cabinet clearly fits a modern and versatile approach, designed to complement both powerful heads and contemporary tones requiring definition.
Who This Amplifier Is For
This speaker cabinet is aimed at intermediate to advanced bassists who want a cabinet capable of handling band volume (rehearsals, club gigs, stages) while remaining portable. Its extended frequency response (35-22kHz) and adjustable tweeter make it suitable for styles demanding precision (funk, pop, modern rock, metal, gospel, fusion), but it can also deliver a solid low-end foundation for more vintage sounds by reducing the treble content. In the studio, it is particularly suitable if you are looking for a mic'd capture with body in the lows and clear articulation in the upper spectrum.
Features and Innovations
The architecture of 2 x 12-inch woofers plus 1 adjustable 1-inch tweeter allows shaping presence and attack according to your playing style and instrument. The rear-ported bass reflex design is intended to enhance low-end extension and add depth, which can be very effective on stage when placing the cabinet at a certain distance from the wall, or conversely more generous if you take advantage of the proximity effect. With a 4-ohm impedance, it is designed to draw maximum power from a compatible head, ideal if you're seeking a simple and high-performance setup with a single cabinet.
Sound Signature
This cabinet features a "modern versatile" sound signature: deep bass (down to 35Hz) with a low-midrange capable of driving the band, and midrange articulation that highlights both fingerstyle and pick playing. The two 12-inch speakers provide a very musical balance between warmth and impact, while the adjustable tweeter allows switching from a softer, organic tone to a very defined attack (slap, sharp attacks, harmonics, fresh strings). The 102dB SPL sensitivity promotes excellent efficiency: at equal power, you get an immediate sense of volume and projection, with good note clarity in a busy mix.
Technical specifications
| Category | Bass cabinet |
| Cabinet impedance (Ω) | 4 Ω |
| Speaker diameter | 12" |
| Number of speakers | 2 |
| Color | Black |
| Finishing | Black tolex |
| Power output | 900 W |
| Power | 900W RMS |
| Impedance | 4 ohms |
| 2 woofers | 12 inches |
| 1 tweeter | 1 inch adjustable |
| Frequency response | 35-22kHz |
| Sensitivity | 102dB SPL |
| Type | rear-ported bass reflex |
| Dimensions | 74 x 38 x 35 cm |
| Weight | 19 kg |
| Finish | black |
Questions frequently asked
What amp head should be used with the GR Bass GR 212 SLIM-4 BLK?
Its 4-ohm impedance requires an amp head compatible with a 4-ohm load. This setup is designed to utilize the power of a suitable amp head with a single speaker cabinet.
Is the tweeter on the 2x12 GR Bass cabinet adjustable?
The 1-inch tweeter is adjustable, allowing control over the presence in the high frequencies. A lower setting provides a smoother sound, while a higher level emphasizes attack, slap, and harmonics.
What power rating does this bass cabinet support?
The stated power rating is 900 W RMS.
What are the dimensions and weight of the GR 212 SLIM-4 BLK?
With measurements of 74 x 38 x 35 cm, this cabinet features a compact 2x12 format. It weighs 19 kg and has a black tolex finish.
How should this rear-ported bass reflex cabinet be positioned?
The bass reflex design has a rear port. Placing it away from the wall results in a more open low-end response, while proximity to a surface enhances that frequency range. The frequency response is stated as 35 Hz to 22 kHz.



