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Darkglass Alpha Omega 900W Bass Amplifier
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Sale price$1,299.99Regular price
$1,499.99
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Pickup available at 2520 W Main St
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Ships from Rapid City, SD. Free on orders over $100.
11,000+ five-star reviews on Reverb
Trusted by players nationwide since 1963.
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This brand new Darkglass head will ship full insured from our Rapid City, SD showroom.
Buy risk free with our 14 day - full refund, less shipping, return policy. Check out our shop policies for more details.
The Alpha-Omega 900 takes the best elements of our most successful distortion preamplifier ever, combined with state of the art features to make a monstrous 900-watt amplifier with earth-shattering tone. While Darkglass' signature Alpha and Omega drive engines add incredible girth and size to the overdriven signal, the studio-grade VCA compressor adds an extra layer of control, and the ultra-quiet 6-band graphic equalizer can help sculpt the tone from aggressive and overdriven to crystal clear clean, whatever your needs may be.
That's not everything though, the MIDI programmability and impulse response cabinet simulation with up to three different storable virtual cabinets make the AO900 not only one of the most complete amplifiers for the touring musician but combined with the auxiliary input and headphone output, the ideal tool for silent practicing.
The Alpha Omega 900 amplifies the best qualities of one of the most powerful and distinct Darkglass products ever made.
Front Panel Features
Input
Use this jack to connect your instrument via a standard mono cable.
Active/Passive
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).
Distortion
Use this push button to turn on or off the Alpha Omega Engine to add natural compression, organic harmonic enhancement, and saturation ranging from mild overdrive to high gain bass rage.
The Alpha?Omega Engine operates before the clean section (you can therefore use the 6-Band Active EQ for additional tone shaping).
Bite
Boosts high mids (2.8kHz) for additional presence and definition.
Growl
Shelving Bass Boost for a fatter tone and increased low end saturation.
Compression
This knob controls the amount of dynamic compression added to the Alpha?Omega Engine. The make up gain is adjusted automatically. The compression can be turned off or assigned using the Darkglass Suite.
Drive
This knob controls the amount of distortion that the Alpha?Omega Engine will deliver. It will change from a soft, warm overdrive to a massive and modern distortion sound.
Level
Use this knob to control Alpha?Omega Engine?s output volume.
Blend
Use this knob to mix between the Clean signal and the Distortion signal (Alpha?Omega Engine).
Mod
Selects or mixes between the two distinct distortion circuits: Alpha is punchy, tight with a lot of definition, whereas Omega is simply brutal and raw.
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 a more aggressive growl.
Bass
+-12dB at 80Hz. Use this knob to change the low-end 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 (10.5l x 2.75h x 10w) / Weight: 2.9Kg (6.39Lbs)
WARNING
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 Alpha Omega 900 can deliver more than 115 dB of power. Exposure to this level of sound can damage your hearing. Use proper hearing protection if you will be exposed.
The Alpha Omega 900 can deliver more than 900 Watts. Be sure that your speaker cabinet is able to deliver that power. You can reduce the output of the amp by selecting the 2 mode on the rear panel (by the SpeakON output jack).
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.
Back Panel Features
Speaker Output
Use this connector to connect the amplifier to your cabinet. This Speakon combo jack allows for either Speakon or speaker cable operation. The outputs are connected in parallel.
WARNING: Do not use an instrument cable with this jack. Using an instrument cable can damage your amplifier.
Min-Load
Press this switch when using a 2 load. You can use this control to lower the output if your 4 cabinet is not able handle more than 500W (you can also get 350W with an 8 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 outputs. 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 response cabinet emulation.
Headphone Volume
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 a proprietary digitally controlled device that allows you to remotely engage and disengage the Alpha Omega Engine.
You can also hold the footswitch to Mute the amplifier. The distortion 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 amp.
AC Power ON/OFF
Use this Switch to release the audio energy from your bass.
AO900
Darkglass Alpha Omega 900W Bass Amplifier
Sale price$1,299.99Regular price
$1,499.99
Customer reviews
11,000+ Five-Star Reviews On Reverb
What players say after the guitar arrives
“This is a beautiful guitar…appreciate the free setup and quick ship! Would purchase from this seller again…THANKS!”
“Thank you too for a wonderful experience and an amazing guitar. I appreciate the quick shipment and great customer service.”
“Very fast shipping, arrived in perfect condition, extremely well set up, no adjustments needed at all! Plays and looks great, exactly as advertised.”
“Fast shipping, and great communication from the seller. Pedal arrived quickly and was packaged really well. Would not hesitate to buy again.”
Very well packed! Would be happy to do business again! Thanks!
“Another masterpiece from Taylor. Great service and communication from Haggerty’s crew. Thanks!!!”
“Beautiful guitar, easy txn! Thank you so much! Looking forward to playing this guitar far into the future.”
“Fast shipping, great pedal. Buy with confidence these guys are great to work with!”
“Great shop! Awesome price, super fast shipping, and great packaging of an awesome new pedal! Thanks!”
Frequently Asked Questions
Do you set up every guitar before it ships?
Yes. Every guitar that leaves our store has been professionally inspected, set up, and signed off by the technician who worked on it. You will find a signed checklist inside the box when your order arrives.
How accurate are your condition descriptions?
We treat condition grading as a contractual promise, not an approximation. When we list something as excellent, that reflects a specific, consistent standard we apply across every instrument. We encourage you to call us before purchasing if you want a detailed in-hand description of any specific guitar.
Can I call and speak to someone about a guitar before I buy?
Yes, and we encourage it. Our team are working musicians, not order-takers. Call us at 605-348-6737 and ask about any instrument in our inventory. We will physically pull it off the wall and describe it to you in detail.
What is your return policy?
We offer a 14-day return policy if you change your mind and the item is returned undamaged. You are responsible for return shipping costs.
Do you offer financing?
Yes. Financing options are available at checkout. Monthly payment options are designed to make high-ticket purchases more accessible without requiring full payment upfront.
How do you ship instruments?
Every instrument ships fully insured from our store in Rapid City, South Dakota. We offer free shipping on all website orders over $100. Guitars are packaged to survive transit, properly cased, braced, and protected.
Are you an authorized dealer?
Yes. We are an authorized dealer for Taylor, Martin, Gibson, Fender, and many other brands. We are currently the number one independent Taylor Guitars dealer in the world, an award we have received two years running for 2024 and 2025. We are also a Top 10 premium dealer for Martin, Gibson, and Fender.
Do you sell on Reverb and Amazon as well as your own site?
Yes. We are one of the top 15 resellers globally on Reverb, where we have accumulated over 11,000 five-star reviews. We are also one of the only independent premium dealers in the world authorized to sell Taylor and Martin on Amazon.
How long have you been in business?
Haggerty's Music has been open since 1963. Our store is located at 515 Mount Rushmore Road, Rapid City, South Dakota.
Do you offer instrument repair?
Yes. Our certified technicians handle everything from routine setups to full restorations across fretted, orchestral, and band instruments. Our team holds certifications from Taylor Guitars, Yamaha, and other leading brands. Learn more HERE.
What brands do you carry?
Our core guitar brands include Taylor, Martin, Gibson, Fender, PRS, Epiphone, Suhr, Eastman, Gretsch, Luxxtone, Novo, Jackson, Charvel, Legator, and Yamaha among others. These are also the most searched brands on our site, so each has a dedicated collection page.
Do you offer music lessons?
Yes. We offer music lessons. You can find out more HERE.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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2520 W Main St, Rapid City, SD 57702.
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