2-Channel Bass Amp Head
2-Channel Bass Preamp
Professional Recording Bass Preamp
2-Channel Direct Box
USB Power Port
GR Bass DUAL800 2-Channel Bass Amp - Specifications
1/4″ Jacks: Channel 1 & 2, instrument inputs
1/8″ Jack: audio source input
Channel Mode switch: assigns preamp channel function; Ch. 1 / Mix Mode / Ch. 2
Gain (Ch1, Ch2): sets instrument and DI volume level
Deep button (Ch1, Ch2):  boost  +5 dB @ 50 Hz
Bass knob (Ch1, Ch2):  boost or cut  ± 13 dB max @ 50 Hz
Mid-Low switch (Ch1, Ch2): assigns the frequency of the Mid- Low knob
185 Hz, Q = 1.2, switch pos 1
375 Hz, Q = 1.2, switch pos 2
800 Hz, Q = 1.2, switch pos 3
Mid-Low knob (Ch1, Ch2):Â Â boosts or cuts the assigned Mid-Low frequency
± 12 max dB (peaking control)
Mid-High knob (Ch1, Ch2): Â boosts or cuts the assigned Mid-High frequency
± 12 max dB (peaking control)
Mid-High switch (Ch1, Ch2):Â assigns the frequency of the Mid- Low knob
600 Hz, Q = 1.2, switch pos 1
1.2k Hz, Q = 1.2, switch pos 2
1.8k Hz, Q = 1.2, switch pos 3
High knob (Ch1, Ch2): boost or cut  ± 13 dB max @ 7.6k Hz
Bright button (Ch1, Ch2):Â boost +6 dB @ 9.6k Hz
Pure Switch:: EQ/Preamp bypass, Channel 1
Line Output 1: level control for Channel 1 XLR DI
Line Output 2: level control for Channel 2 XLR DI
Overdrive:Â Drive level, Distortion Mode, Blend, HiPass Filter controls. Channel 2 only.
Master Volume (Ch1, Ch2): speaker output level
Speaker Button:Â mutes speaker output
Headphone 1/8″ Jack: connect earbuds or headphones
LED/Fan Mode Switch: Â assigns LED panel function Tuner / VU Meter, and Fan Mode (Studio/Live)
Speaker Output: 2x Speakon 1/4″ Combo
Ground Lift Button:Â lifts XLR output ground
Pre/Post Button:Â assigns EQ or EQ-bypass to the DI output
Channel 1 XLR DI Output:Â for PA or DAW recording interface
Channel 2 XLR DI Output:Â for PA or DAW recording interface
FX Loop: 1/4″ Send and Return jacks. Effects loop on Channel 1.
USB Power Port: 300mA power supply for your smartphone / USB device
9VDC Power Port:Â 300mA Effect Pedal Power Supply
Power:Â 800W RMS 4 ohm, 400W RMS 8 ohm, single channel
AC Input: 115-230v (auto selectable)
Dimensions: 12.25″ x 10.25″ x 3.5″
Weight: 6.5 lbs.
Warranty: 5 years
*Exceptions may apply
Colin Baxter –
I have been playing bass longer that I care to remember. In that time I have owned literally just about every bass amp out there. Some very good ones and some not so good, so I know what I’m talking about. I have had this GR Bass Dual 800 for just over two weeks now and have put it through its paces. Without a doubt I can truly say this is the best bass amp I have ever owned to date. When they say Pure Tone, they are not kidding. If you just want to hear the true sound of your bass without colorization, this is the amp for you. If you like to tweak the EQ, then it is all there and then some. It has a great built in tuner that can even handle a six string. With an aux in, two separate channels (mixable) and many other great features, I’ll be using this amp for everything. It’s got it all, heck you can even charge your phone and Dave is a great guy to help you out with your purchase or any other bass related questions.