Microtubes Combo 500 Manual

Input: Use this jack to connect your instrument via a standard ¼” mono cable.
Headphone Output: Connect your Headphones and enjoy the analog cabinet emulation.
Passive/Active: 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).
Compression: Controls the amount of dynamic compression. The make up gain is adjusted automatically.
Drive: Controls the amount of distortion that the Microtubes Engine will deliver. Press to select the drive mode: OFF / Vintage Microtubes (Blue) / Microtubes B3K (Red).
Blend: Use this knob to mix between the Clean signal and the Distortion signal.
Level: Controls Microtubes Engine’s output volume.
Bass: ±12 dB @ Low shelf
Low Mids: ±12 dB @ 500 Hz / 1 kHz. Press to select the frequency (LED is ON for 1 kHz)
Hi Mids: ±12 dB @ 1.5 kHz / 3 kHz. Press to select the frequency (LED is ON for 3 kHz)
Treble: ±12 dB @ High shelf
Master: Use this knob to control the overall volume of the combo. Press for Mute.

AC Power ON/OFF: 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!
Tweeter: Turn the tweeter ON/OFF.
Pre/Post: Select between the unprocessed for the DI XLR output 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.
Return: Use this input to receive the signal from your outboard gear.
Send: Use this output to send the signal to your outboard gear.
Footswitch: Use to connect the Darkglass Super Intelligent Footswitch or Intelligent Footswitch using a ¼” mono instrument cable. The Darkglass MIDI footswitch can also be used as Super Intelligent Footswitch.
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. Tvhe minimum power rating must be 250 W. WARNING: Do not use an instrument cable with the external speaker connector. Using an instrument cable can damage your amplifier.

• This device can emit extremely loud sounds that might result in temporary or permanent hearing loss. Please proceed with caution when setting and adjusting the volume.
• Please ensure that the voltage selector on the back of the unit is set to the correct mains voltage before powering up Microtubes 500 Combo.
• The speaker output has a minimum load of 8 Ω. Never use an instrument cable with the speaker output.
• No user-serviceable parts inside the amplifier. Do not open the amp.
• Never use the amp at a high moisture environment or near liquids.
• The Microtubes 500 Combo can deliver ear-shattering sound pressure levels. Exposure to this level of sound can damage your hearing. Use proper hearing protection.
• The Microtubes 500 Combo can deliver more than 500 watts. Be sure that your speaker cabinet is able to deliver that power.
• Do not cover the vent holes. The fan and vent holes are part of the cooling system of the amp.
• Covering the vent holes can damage the power amp by overheating it.
• Don’t use an instrument cable as speaker cable. An instrument cable is not designed to deliver the type of power signals sent from the amplifier to the speaker.

The Microtubes 500 Combo comes with a 2-year limited warranty covering manufacturing defects. If you experience any issues with your amplifier, please contact support@darkglass.com to obtain a Return Authorization Number or to find out about the nearest authorized repair center.

In the interest of continuous improvement, specifications are subject to change without notice. If you have any questions, please don’t hesitate to contact us at www.darkglass.com The manufacturer claims that the above product fulfils the requirements as set by EN55013, EN55020, EN60555-2, EN60555-3, RoHS, WEEE.

This equipment has been tested and found to comply with the limits for a Class B Digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in residential installations.

This equipment has been tested and found to comply with the limits for a Class B Digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in residential installations.

This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. There is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Darkglass Electronics Oy
Elimäenkatu 20, 00510
Helsinki, Finland

Darkglass®, Microtubes® and B3K®, are registered trademarks of Darkglass Electronics Oy.

Engineered in Helsinki, Finland.
www.darkglass.com