Unrivaled 900-Watt Class-D Power Meets Studio-Grade Tonal Control
The Darkglass Electronics Microtubes 900 V2 pushes modern bass amplification into absolute versatility. Delivering a massive 900 Watts RMS of clean Class-D power, this compact amplifier head is built for touring professionals and modern studio players who demand uncompromising low-end punch, high headroom, and articulate gain shaping in a lightweight chassis.
Equipped with dual analog Microtubes engine circuits—the aggressive, punchy Microtubes B3K and the warm, vintage-voiced Vintage Microtubes (VMT)—the M900 V2 switches seamlessly from glass-like, high-headroom clean tone to crushing high-gain overdrive. An updated 6-band graphic EQ gives you pinpoint frequency control, while the built-in studio-grade VCA compressor ensures consistent dynamics whether you play light fingerstyle, heavy pick attack, or aggressive slap.
Why We Love It at The Guitar Sanctuary
At The Guitar Sanctuary, the Microtubes 900 V2 is one of our absolute top recommendations for bass players looking for a single amplifier to handle everything from direct-to-FOH silent tracking to full stadium stages. The inclusion of custom Impulse Response (IR) cabinet simulations, MIDI program switching, and extreme low-impedance operation down to 2 Ohms makes it an indispensable tool for the modern bassist who refuses to compromise on tone or flexibility.
Key Features & Performance Attributes
- Dual Microtubes Engine Drive Circuits: Toggle between the ultra-modern B3K distortion and the vintage-warm VMT voicing for endless overdrive textures.
- 6-Band Graphic EQ: Precise frequency control across crucial bass ranges (+/- 12 dB at 50 Hz, 250 Hz, 500 Hz, 1.5 kHz, 3 kHz, and 3 kHz shelving).
- Studio-Grade VCA Compressor: Intelligent, studio-quality dynamic control with automatic gain compensation.
- Digital Impulse Response (IR) Cabinet Simulation: Store up to three custom cabinet IRs on the unit for authentic direct recording and FOH output without a speaker cab.
- Flexible Impedance & Silent Practice: Supports 2-Ohm, 4-Ohm, and 8-Ohm speaker loads, plus a dedicated headphone output for silent practicing.
- Full MIDI Integration: Trigger channel switching, overdrive engagement, and mute states via external MIDI controllers.
Technical Specifications
- Power Output: 900 Watts RMS @ 4 Ohms / 2 Ohms (450W @ 8 Ohms)
- Amplifier Power Section: Lightweight Class D
- Preamp Section: Analog with digital IR cabinet simulation engine
- Drive Circuits: Microtubes B3K and Vintage Microtubes (VMT)
- EQ: Active 6-Band Graphic Equalizer
- Inputs: 1 x 14" Instrument Jack (with active/passive pad switch), Auxiliary Input (1/8" stereo)
- Outputs: Neutrik Speakon-1/4" Combo Output, Balanced XLR DI Out (Post-EQ/IR), Balanced XLR DI Out (Pre-EQ/Direct), 1/4" Headphone Out
- Connectivity & Control: MIDI In, USB (for Darkglass Suite IR management), Footswitch Jack
- Dimensions: 10.5" W x 10.0" D x 2.7" H (26.7 cm x 25.4 cm x 7.0 cm)
- Weight: 6.39 lbs (2.9 kg)
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).
Microtubes: Use this push button to turn on or off the Microtubes Engine to add natural compression, organic harmonic enhancement, and saturation ranging from mild overdrive to high gain bass rage.
The Microtubes Engine operates before the clean section (you can therefore use the 6 Band Active EQ for additional tone shaping in addition to the Tone knob described below).
Compression: This knob controls the amount of dynamic compression added to the Microtubes Engine. The make up gain is adjusted automatically. The compression can be turn off or assigned using the Darkglass Suite.
Drive: This knob controls the amount of distortion that the Microtubes Engine will deliver. It will change from a soft warm overdrive to a massive modern distortion sound.
Tone: This knob controls the high harmonic content of the Microtubes Engine via a variable low pass filter: crank it up for additional attack and definition or dim it down for a smoother sound, especially handy if already running bright clean EQ setting or cabinets with tweeters.
Level: Use this knob to control Microtubes Engine’s output volume.
Blend: Use this knob to mix between the Clean signal and the Distortion signal (Microtubes Engine).
B3K/VMT: This push-button switch selects between two overdrive voicings: B3K mode will deliver an aggressive, percussive sound while the VMT will bring up the mids for a warmer, more neutral character.
Gain: Use this knob to change the volume of the signal before the Active 6 Band EQ. You can set it low for ensuring the cleanest operation possible or set it higher for more aggressive growl.
Bass: +-12dB at 80Hz. Use this knob to change the low content of the signal.
Mids: +-12dB at 250, 500,1.5K and 3Khz. This graphic eq control the mid content of the signal.
Treble: +-12dB at 5kHz. Use this knob to change the high content of the signal.
Master: Use this knob to control the overall volume of the amplifier.
Mute: Use this push button to mute the amplifier.
DIMENSIONS: 26.7cm l x 7cm h 25.5 w (10.5”l x 2.75”h x 10”w) / Weight: 2.9Kg (6.39Lbs)
Min-Load: Press this switch when using a 2Ω load. You can use this control to lower the output if your 4Ω cabinet is not able handle more than 500W (you can also get 350W with an 8Ω cabinet in this configuration).
Send: Use this output to send the signal to effects pedals.
Return: Use this input to receive the signal from effects pedals. Master volume control is after this input.
Ground Lift: Use this control to lift the ground of the DI XLR output. If you are experiencing ground noise in your DI signal try changing the setting of this control.
Pre DI Output: Use this output to send a balanced copy of your input signal to recording equipment, mixer etc. The output is latency compensated to match with the Post DI Output.
Post DI Output: The signal for this output is taken after the distortion, EQ and effects loop, and processed through the cabinet simulation engine. The output is latency compensated with the Pre DI Output, and not affected by the master volume.
USB: The USB connector allows you to use the Darkglass Suite to load different cabinet impulses or change different parameters on your amp (midi, compressor, etc)
Headphone Output: Connect your Headphones and enjoy the impulse based cabinet emulation.
Headphone Volume: This knob controls the volume of the headphone output.
Aux In: Use this connector to provide to the Headphone output music from your laptop, cellphone, mp3 player, etc.
Cabinet Select: Switches between 3 different cabinet impulses and bypass this section for a rawer sound. Hold this button enter MIDI Learn mode to choose the MIDI channel.
MIDI: The midi input allows you to change channels, toggle the mute and compressor, and select the cabinet simulation slot with any standard MIDI device. Both Program Change and Control Change commands can be used.
Footswitch: The Intelligent Footswitch is proprietary digitally controlled device that allows you to remotely engage and disengage the Microtubes Engine. You can also hold the footswitch to Mute the amplifier. The VMT/B3K push button will remain operational with the Intelligent Footswitch plugged in. · You can use a regular mono instrument cable to connect the amplifier to the footswitch. · You must remove the cable from the footswitch jack in the rear panel if you want to control the amp from the front panel.
AC Socket: Use this connector to feed electric power to the amplifier. 100 - 230 VAC, 50Hz-60.
AC Power ON/OFF: Use this Switch to release the audio energy from your bass.
We are open Tuesday-Saturday from 10am until 6pm CDT.
Any order placed before 3pm CDT Tuesday through Saturday is processed for shipment the same day. Orders placed Sunday-Monday will be processed for shipment the following Tuesday.
For Free Shipping items, Effects pedals and small goods items are generally shipped via USPS Priority Mail, and Guitars and Amplifiers are generally shipped via UPS Ground.
Due to our central location in the middle of the US, most orders will be delivered within 1-3 days delivery time.
Other shipping methods are available (at an additional cost), including next day air.
Please call us directly at (972)540-6420 if you have any questions regarding shipping for your order.
