Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated .

Average Price: $819

High-end/Boutique

$200

$801+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 1 merchant for "GRBass One 800 Amplifier". Prices shown reflect NEW condition. Tracking began Apr 19, 2026.

* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Elevate your bass game with the GRBass One 800 Amplifier, a powerhouse that packs 800 watts of pure, unadulterated sound into a compact, road-ready design. This amplifier head is engineered for the discerning bassist who demands both performance and versatility in their gear. At its core, the One 800 offers a robust EQ section with controls for Gain, Low, Mid Low, Mid High, High, and Master Volume, allowing you to sculpt your sound with precision.

What sets the One 800 apart is its selectable frequency bands for both mid low and mid high ranges, enabling you to tailor your tone to any musical setting. The amplifier also features Deep and Bright Boost switches for extra tonal richness, along with a Pure Sound switch that bypasses the EQ for a clean, direct signal. Whether you're on stage or in the studio, the switchable LED/Fan Mode and built-in mute switch ensure seamless operation.

Connectivity is a breeze with front inputs for your instrument, auxiliary devices, and headphones, while the rear connectors include an FX loop and an XLR DI-Out for direct recording. Additional features like the ground lift and DI pre/post switch make this amp a reliable choice for any professional setup. Crafted in Italy, the GRBass One 800 is your ticket to a powerful and customizable bass experience.

Key Features:

  • Power: 800 W RMS
  • Impedance: 4 Ohm
  • Comprehensive EQ controls: Gain, Low, Mid Low, Mid High, High, Master Volume
  • Selectable mid frequencies: Mid Low (185, 375, 800 Hz), Mid High (600, 1200, 1800 Hz)
  • Deep and Bright Boost switches
  • Pure Sound switch (EQ Bypass)
  • Switchable LED/Fan Mode
  • Mute switch
  • Ground lift, DI pre/post switch
  • Effects loop: Serial
  • Front connectors: Input, aux in, headphones out
  • Rear connectors: FX Loop (Send, Return), XLR DI-Out
  • Made in Italy

Product specs

Available since April 2020
Power 800 W
Equalizer 4-Band
Compressor No
Limiter No
Effects Processor No
External effect loops Yes
Speaker Connector Jack, Speakon
Headphone Output Yes
DI Output Yes
Tuner Out No
Rack mount No

FAQs

What is the power output of the GRBass One 800 Amplifier?

The GRBass One 800 Amplifier delivers 800 watts of power, making it suitable for medium to large venues and ensuring a robust sound for live performances.

Does the GRBass One 800 Amplifier include a built-in compressor or limiter?

No, the GRBass One 800 Amplifier does not include a built-in compressor or limiter, allowing users to choose external effects to tailor their sound.

What type of connectivity does the GRBass One 800 Amplifier offer for speakers?

The GRBass One 800 Amplifier provides both Jack and Speakon connectors for versatile speaker connectivity options.

Is the GRBass One 800 Amplifier suitable for use with headphones?

Yes, the GRBass One 800 Amplifier includes a headphone output, making it convenient for silent practice sessions.

Can I use external effects with the GRBass One 800 Amplifier?

Yes, the GRBass One 800 Amplifier features an external effects loop, allowing you to integrate your preferred effects pedals into your setup.

Premier Guitar

Premier Guitar

Review Demo - GR Bass Amplification One800

Video thumbnail for Review Demo - GR Bass Amplification One800 by Premier Guitar

Review Demo - GR Bass Amplification One800

Premier Guitar

Premier Guitar

Video thumbnail for GRBASS ONE 800 head review by GR Bass

GRBASS ONE 800 head review

GR Bass

GR Bass

Video thumbnail for GR Bass One800 - Sound Demo (no talking) by Bass Bonedo

GR Bass One800 - Sound Demo (no talking)

Bass Bonedo

Bass Bonedo

Video thumbnail for FERNANDO MOLINARI - GRBASS ONE 800 by Fernando Molinari

FERNANDO MOLINARI - GRBASS ONE 800

Fernando Molinari

Fernando Molinari

Video thumbnail for GR Bass AT 212 Slim (700W) vs AT 212 Slim+ (900W), driven by GR Bass ONE 800 amplifier by John Fox Bass

GR Bass AT 212 Slim (700W) vs AT 212 Slim+ (900W), driven by GR Bass ONE 800 amplifier

John Fox Bass

John Fox Bass

Reviews

PROS

  • Offers noise-free activation and sensitive, quiet potentiometers

  • Provides fantastic sound calibration, both indoors and outdoors

  • Features a game-changing Pure Sound switch for enhanced audio control

  • Has thump, punch, and clarity that stands out in its class

  • Includes versatile options like adjustable headphone and DI outputs

  • Compact size with a powerful performance-to-weight ratio

  • Auto-selectable voltage input for international use

  • Phenomenal sound heft and distinct character compared to competitors

CONS

  • Control panel design is cramped, making adjustments difficult

  • Micro-switches for frequency adjustments feel flimsy and hard to use

  • Overly bright LED lights can be distracting

  • Instruction manual lacks comprehensive documentation for all features

  • Some users find the extensive features overwhelming and hard to manage

  • Packaging quality is subpar for the product's weight and value

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about GRBass One 800 Amplifier.

Comparisons

  • GR Bass Pure 800 is noted for clean, transparent tone, unlike Markbass, GK, and Warwick heads which add color through their preamps.

    Source
  • One user found the GR Bass One mini head with a GR Bass 1x15 cab to sound better than various SVT setups, weighing only 22 lbs in total.

    Source
  • The GRBass One 800 is favored over the EBS Reidmar for preserving sound integrity without distortion.

    Source

Features and functionality

  • GR Bass amps are noted for their built-in DI, which is heavily utilized by users who previously owned MarkBass equipment.

    Source
  • The GRBass One 800 is noted for its small, lightweight design, making it easy to transport without sacrificing on power.

    Source

User experience

  • Users find GR Bass cabinets lightweight, offering portability benefits despite less desirable sound quality compared to their amps.

    Source
  • Owners report that the GR Bass One 800 pairs impressively with Broughton SV-Pre pedals for a sound that rivals classic SVT rigs, without the weight.

    Source
  • Owners appreciate the amp's "honest" sound, indicating minimal coloration, which appeals to those who prefer a transparent tone.

    Source

Use cases and applications

  • A GR Bass setup is praised for its portability and tone, being favored by users who need to emulate the SVT sound in a lightweight format.

    Source
  • The GRBass One 800's power is valued by progressive rock musicians who require dynamic range and loudness for live performances.

    Source

Build quality

  • Some users find the bright lights on the GRBass One 800 visually unappealing but mention its fan is quieter compared to Hartke models.

    Source

Critic Reviews

GR Bass ONE800 and GR 212 Review - Premier Guitar

premierguitar.com

The GRBass One 800 Amplifier delivers a powerful punch in a compact package, offering excellent tone and a plethora of features that cater to modern bassists. Its user-friendly design includes thorough EQ options and handy extras like an onboard tuner and power supply for pedals. However, the dazzling array of LED lights can be distractingly bright, and while the amplifier excels in clarity and volume, it may lack the warmth that some players seek. Overall, this amp stands out for its performance and versatility, making it a compelling choice for both live gigs and studio work.

positive

5.0 out of 5

Based on 1 Review and 1 Rating

5 star
4 star
3 star
2 star
1 star
robertharper

Light in weight, heavy on sound!

Bassist Robert Harper uses the ONE 800 Amp Head POWER 800 W RMS 4 ohm, 700W RMS 8 ohm

DIMENSIONS : 31 x 19 x 5 cm

Weight: 2,85 Kg

COLOURS black, white, custom colour

FRONT PANEL - Tuner / Vu-Meter - Input - Aux In - Gain - Deep filter - Low - mid Low - mid High - High - Bright filter - 3 freq for mid Low - 3 freq for mid High - Pure Sound - Volume DI (antibump) - Headphone master - Headphone output - Master Ch1 - Master Ch2 - Mute

REAR PANEL - Input 230-115v (auto selectable) - 9 Volt 300mA - Send/Return - Pre/Post DI - GND lift - DI Output - Speakon Ch1 - Speakon Ch2 - Fan (Studio/Live mode)

Roles:
Genres:

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

More GRBass Bass Amplifier Heads

Artist usage

Community setups

Similar