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Mini CMD121PIV

Mark Bass MINI CMD 121P IV Bass Guitar Amplifier 12Inch 500w Amp Combo

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Product Information

Our flagship combo Mini CMD 121P has changed the bass amp market forever. Never have bassists been able to get such great tone and volume from such a light and portable amp. This new version with Little Mark IV Combo head features the new bi-band limiter, a MUTE switch and the 3-way switch that includes the options of Flat, Scooped or FSW. As for previous version it can be easily upgraded to a powerful 2x12" 500W rig with the addition of a New York 121 cabinet.


After years from its initial release in the 2005, this combo continues to lead the pack when it comes to big sound from a small package. The sound that comes from this amp simply does not match what you see when you look at such a small cube.

Our updated 4 band EQ section features very effective controls allowing you to easily find the sound you want, boosting or cutting up to 16dB for each of the 4 bands to cover all the tonal nuances needed in any genre of music. Additionally the Old School filter cuts your high frequencies and gives a round and smooth tone. The 3 way rotary-switch allows you to choose between a super-balanced flat tone, a scooped preset that drops the mids while boosting the lows and highs - giving a superb slap sound, or lastly the 'FSW' option to control both mute and the Scooped EQ on demand by connecting an optional dual footswitch.

Our new bi-band limiter responds faster and more dynamically to your playing than traditional limiters do and lets your high end "breathe" for a more natural sound. It makes our amp heads the best choice for anyone who enjoys a quick, punchy attack at high volumes.

If you add the New York 121 to the Mini CMD 121P combo, you’ll have a 500W 2x12” stack able to fill a large venue with headroom to spare.

Even when stacked on a New York 121 cabinet (which has the same dimensions), this combo creates a footprint on stage of only 15” x 14”. You'll never have a problem fitting this rig on even the smallest of stages!



  • INPUT Impedance: 1 Mohm, Max. Voltage: 9 Vpp
  • RETURN Impedance: 22 Kohm, Max. Voltage: 10 Vpp


  • GAIN: -46 dB to +23 dB Range
  • LINE OUT Level Control on Front Panel
  • PRE/POST EQ (for Line Out) Switch on Rear Panel
  • GROUND LIFT Switch on Rear Panel


  • LOW: Center Frequency 68 Hz; Level: ±16 dB
  • MID LOW: Center Frequency 360 Hz; Level: ±16 dB
  • MID HIGH: Center Frequency 800 Hz; Level: ±16 dB
  • HIGH: Center Frequency 10 kHz; Level: ±16 dB
  • OLD SCHOOL: Max Cut Range: 250 Hz – 20 kHz
  • 3 WAY SWITCH: Flat/Scooped-Mid/FSW


  • SEND EFFECTS: Unbalanced, Max. Voltage 20 Vpp
  • TUNER OUT: Unbalanced, Max. Voltage 2 Vpp
  • LINE OUT Balanced XLR, Max. Voltage 20 Vpp
  • SPEAKER OUT: Speakon/1/4” Combo, 1/4”*



Output Power

  • 500W RMS @ 4 ohm, 300W RMS @ 8 ohm

Power Requirement

  • 100V; 120V; 230V; 240V 50/60Hz (Voltage is Factory Preset According to Region of Sale)


  • 1×12″


  • Piezo

Bass Reflex

  • Rear


  • 8 ohms

Speaker Power Handling

  • 400W RMS (AES Standard)

Frequency Response

  • 45 Hz to 18 kHz

Crossover Frequency

  • 3.5 kHz


  • 99 dB SPL

Dimensions and Weight

  • WEIGHT: 25.79 lbs / 11.7 Kg
  • WIDTH: 14.96 in. / 38 cm
  • HEIGHT: 16.73 in. / 42.5 cm
  • DEPTH: 14.17 in. / 36 cm


1 Year Warranty

Shipping & Delivery

All orders over $100 will be automatically eligible for FREE Shipping Australia Wide, if you order is under $100 there will be a flat rate of $10.

Belfield Music is well known for its top online customer service. We treat all online customers with the same excellent service we give to our in store customer. We will ensure that you receive all the support you need while your goods are in transit and ensure the goods arrive promptly. All of our shipments have tracking numbers available and we cover every single unit by our own shipping insurance.     

Online orders are normally processed within 1-3 business days. Once processed, your order should take between 1-8 business days to arrive depending on your location. Please note that your order may take up to 10 business days to arrive from the day you place your order. 

If it transpires that the product is out of stock due to a stock discrepancy and/or there will be a delay in shipment, we will contact you within 2 business days of placing your order and give you the option of waiting or cancelling your order. The products we advertise online should show if they are in stock or not. We do our best to keep the website stock count up to date, but there may be an occasional error.

If you wish to utilize an Express Delivery Service to receive your item, please contact us for a shipping quote before you place your order at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.           

Deliver is made during the hours from 8:00am till 5:30pm Monday to Friday. As such, please ensure you nominate an address which is capable of receiving goods during 8am and 5.30pm.  Given the restrictions on PO Box deliveries we cannot deliver larger sized items to a PO Box.

If for any reason our selected carriers don't service your area we will contact you before processing your order if this applys to you.

Returns Policy

If you wish to return an item which is not damaged or faulty in any way and you have simply changed your mind or made the wrong decision, you must let us know within 7 days of receiving the item.  We will not agree to refund an item because you simply changed your mind or made the wrong decision if we have not been advised of your intention within 7 days of receiving your item. Once we have provided a return authority, it is the buyer’s responsibility to return the item, at their own costs within 30 days from original purchase. If the item is returned with any damage or alteration to its original packaging, we will refund the item subject to applying a minimum 15% restocking fee.  We will not refund the costs of the initial shipping charges.

It is in Belfield Music best interests to keep our customers happy with their purchases. If you are not happy with your purchase, please talk to us first. We will always attempt to resolve any problems you may have as best we can. To contact us please email us at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.