GRBass One 800
In stock
One 800
The GRBass ONE 800 is a killer of an amp for bassists who demand massive tone without lugging massive gear. Compact, powerful, and designed with GR Bass’s signature PURE SOUND philosophy, these amps deliver uncolored, transparent tone that lets your bass truly sing.
With a 4-band EQ and six selectable mid frequencies, the ONE series gives you next-level control to shape your sound. Need more growl? Dial in the mids. Craving deep low-end thump or crystalline highs? The deep and bright filters let you punch up the warmth or add razor-sharp definition. It’s all about dialing in your vibe, your way.
Whether you’re locking in the groove at a gig, laying down tracks in the studio, or just jamming out, the GR ONE series hits that sweet spot between portability and power. Feather-light but built like a tank, these amps bring tone and punch for days without breaking your back
The GRBass ONE 800 offers a super tool box for modern bass players, packed with features that make it a true gig and studio companion. With the “PURE” switch, you can bypass the filters and equalizer to deliver an entirely flat sound—perfect for pairing with an external EQ or seamlessly switching between different instruments during a performance.
Its standout feature? The 24-LED V Meter, which doesn’t just provide precise level monitoring across six modes—it also functions as a highly accurate tuner. Whether you’re in “Mute” mode or playing normally, this tuner is always ready to keep you in tune, no matter the situation.
For added convenience, the Aux-In allows you to plug in an external sound source, like a tablet or smartphone, for play-alongs or practice sessions. Plus, the separate volume-controlled headphone output doubles as a personal monitoring system, letting you dial in your own mix without disturbing others.
Finally, the GR ONE’s D.I., widely regarded as one of the finest in the industry, ensures pristine sound for both live and studio setups. Whether you’re laying down tracks or playing to a packed venue, this amp ensures your tone stays crystal clear and professional.
Specs
Power and Ohm
- Maximum Power Output
- 1200W
- Preamp
- Two 12AX7 tubes
- Minimum Load Impedance
- 2.67Ω
Input
- INPUT JACK
- Input jack for your bass
- AUX-IN
- A 3.5mm jack auxiliary input to connect an external audio device.
Controls
- GAIN CONTROL KNOB
- Sets the input signal amount of the pre-amp
- D.I
- Setting the output to the FOH
- HEADPHONES OUTPUT
- 3.5mm plug for headphones
- OPERATION LED
- Blue = Normal operation. Red = High level of the input signal (clip)
- VU-METER - Chromatic tuner
- 24 LEDs that can be used as VU-METER and/or chromatic tuner. The 6 central LEDs marked with the letters B, E, A, D, G, C are the reference LEDs when using the chromatic tuner. These marked LEDs identify the reference note. When the corresponding note is tuned, the LED changes from red light to blue light. The more red LEDs light up, the more the note is out of tune.
Eq
- Bass
- Increases or reduces the bass frequencies of the signal.
- Mid Low
- Increases or reduces the mid-low frequencies of the signal
- Mid High
- Increases or reduces mid-high frequencies of the signal
- High
- Increases or reduces the high frequencies of the signal
Toggle switches
- Deep
- Gives a more deep sound.
- Bright
- Gives a more bright sound.
- MID-LOW SWITCH
- Use this switch to change the frequency of the mid-low band from 185 Hz, 375 Hz, and 800 Hz.
- PURE SWITCH
- Allows bypassing all the equalization filters of the preamplifier. The pure-mode activation is signaled by the LED on the top of the button.
- MID-HIGH SWITCH
- Use this switch to change the frequency of the mid-high band from 600 Hz, 1200 Hz, and 1800 Hz.
- PRE-POST DI BUTTON
- Allows you to choose the type of signal to be sent to the DI output DI: PRE EQ or POST EQ.
- GND LIFT BUTTON
- Isolates the DI output from the ground wire.
- LED Fan
- Controls the LED's
- Mute
- Mutes the amp
Outputs
- AC POWER SOCKET (230V - 115V)
- IEC plug for power supply connection. The power supply self-recognition feature allows power to the GR-ONE with a voltage of 230V or 115V.
- POWER ON/OFF SWITCH
- Switch on and off the amplifier.
- 9V DC OUT
- 9V DC output to connect external equipment. The polarity is center negative. 300mA.
- D.I out
- The DI output is equipped with an anti-bump system, which allows you to turn on and off GR-ONE even with the mixer line still on, without causing the annoying and noisy bump.
- Aux In
- 3.5mm input for external playback device such as an MP3 player.
- Foot Sw
- For the footswitch
- Return
- 6.35mm jack plug to connect an external effect’s output.
- Send
- 6.35mm jack plug to connect an external effect’s input.
- Speaker Outputs
- It is possible to use a 6.35 mm jack. We recommend using a 2-pole Speakon connector. Never use a 6.35 jack guitar cable to connect your amplifier to your speakers.
Mechanics
- Dimension
- W26,5 x D22 x H5,5 cm
- Weight
- 2,35Kg