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Darkglass Electronics Microtubes 500 1x12" Combo Bass Amplifier


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Top Panel Features


Use this jack to connect your instrument via a standard ¼” mono cable.

Headphone Output

Connect your Headphones and enjoy the analog cabinet emulation.


Use this push-button switch to change from passive to active mode. If your bass is active it can have a hotter signal making the amp to distort early (feel free to use if such additional distortion is desired).


Controls the amount of dynamic compression. The make up gain is adjusted automatically.


Controls the amount of distortion that the Microtubes Engine will deliver. Press to select the drive mode: OFF/Vintage Microtubes /Microtubes B3K.


Use this knob to mix between the Clean signal and the Distortion signal.


Controls Microtubes Engine’s output volume.


±12 dB @ Low shelf

Low Mids

±12 dB @ 500 Hz/1 kHz

Press to select the frequency

Hi Mids

±12dB @ 1.5 kHz / 3 kHz

Press to select the frequency


±12dB @ High shelf


Use this knob to control the overall volume of the combo. Press for Mute.

Back Panel Features


Power ON the combo beast.

AC Socket

Use this connector to feed electric power to the amplifier. 100 – 230 VAC, 50-60Hz. Set the voltage selector switch to the correct position before turning on the amplifier!


Turn the tweeter ON/OFF.


Select between the unprocessed clean DI and the processed signal.

DI Output

Use this connector to send your signal to the console, mic preamp, interface, etc.

Ground Lift

Use this control to lift the ground of the XLR output. If you are experiencing ground noise in your DI signal, try changing this control.

Aux In

Connect this to the headphone output of your laptop, cellphone, MP3 player, etc. The Aux In signal is fed only to the headphone output.


Use this input to receive the signal from your outboard gear.


Use this output to send the signal to your outboard gear.


Use to connect the Darkglass Super Intelligent Footswitch, Intelligent Footswitch or MIDI Footswitch using a 1/4″ mono instrument cable.

External Speaker

Use this connector to connect the amplifier to an external speaker cabinet. The SpeakON Combo jack allows for SpeakON or ¼” speaker cable operation. The minimum load impedance is 8 Ω. The minimum power rating must be 250 W.

WARNING: Do not use an instrument cable with this jack. Using an instrument cable can damage your amplifier.

Technicals details


Custom Design Eminence® Speaker


Eminence® Tweeter

Power Rating RMS

500 Watts


Width: 43.0 cm / 16.9″
Height: 49.3 cm / 19.4″
Depth: 43.2 cm / 17″
Weight: 14.5 kg / 32 lb

200 Gateway Dr.,
Bel Air, MD 21014
410.879.1079Located behind Best Buy
Next to the Bel Air Post Office
‍Monday thru Friday 10am to 9pm
Saturday 10am to 6pm
Closed Sundays and Major Holidays
Repair Shop: M – F 10:30am to 5:30pm