MARKBASS BIG BANG RACK EARS

These large rack ears allow you to mount your Markbass SA 450, SD 800, TSA 500, TA 501, TA 503, 
Studio Pre 500 or R 500 amplifier into one unit of any standard rack case.

 

 
MB58R 121 P
Product code: MBL100110
The MB58R series is a further example of how Markbass is always one step ahead in innovating using state-of-the-art 
technologies. Once again Marco De Virgiliis with his pioneering soul has managed to create this new series of 
products which, with the use of custom components born thanks to years of experience and research Markbass and 
the use of revolutionary materials with an eye to the future and the evironment, has really nailed the tone and 
power versus portability issue.
The MB58R 121P features 1x12" Markbass classic ceramic speaker and a new piezo tweeter. The P series is created 
for those who like classic speakers but don’t want to carry heavy stuff, thanks to the revolutionary material 
used for the cabinet enclosure, the MB58R 121Pweighs only 9.26 kg !

UNMISTAKABLE TONE
Strength for Markbass products has always been an unmistakable tone. This new series has custom components born 
thanks to years of experience and research.

MADE IN ITALY
Not just technology but also GLOCALIZATION and Made in Italy. Glocalization is for Markbass a key word, intended 
as the use and optimization of local resources to be competitive on the global market.

ECO-FRIENDLY
It’s time to think about the future; focus on the product and on the natural environment that surrounds it.

AMAZING POWER TO WEIGHT RATIO
State of the art and technology with an amazing power to weight ratio.The MB58R 121Pfeatures 1x12" classic ceramic 
speaker but thanks to the revolutionary material and technology used for the cabinet enclosure it weighs only 
21.61 lbs / 9.8 kg, and with its 300 watts (RMS) of power handling it’s a great choice for those who like classic 
speakers but don’t want to carry heavy stuff. It can be used as a standalone with a
Markbass head or as extension cabinet for the MB58R MINI CMD 121 Pand MB58R CMD 121 Pcombos.

BEST QUALITY, RIGHT PRICE
The new series of products has an incredible strength point: high quality and innovation at the right price.

MODERN CLASSIC WINNING AESTHETIC
Considered by all as the most beautiful cabinet on the market.



SPEAKER SIZE
1×12” Markbass classic ceramic

TWEETER
new piezo tweeter

CAB POWER HANDLING (AES STANDARD)
300W
RMS

CROSSOVER FREQUENCY
3.5 kHz

FREQUENCY RESPONCE
40Hz to 18KHz

SENSITIVITY DB SPL
99 dB

IMPEDANCE
8 ohms

REFLEX
Rear

DIMENSIONS
39cm (w); 57.8cm (h); 47cm (d)

WEIGHT
9.26 kg

The new CM20B & CM40B from our CM Series are the compact versions of our best selling CM150B bass amplifier, 
developed to satisfy players looking for solid build quality, simple and direct user interface, and superb-sounding 
tones in an affordable, compact, rock-solid package great for playing at home or for smaller venues.

20W Bass Amplifier
The CM20B is CM series with compact size, modern design, and powerful sound. It's designed to meet both beginners 
who are just starting to play and those who want to have a sleek, compact amplifier. It is characterized by its 
versatility to digest a wide range of genres.

8" Speaker
The compact 8” speaker is efficient with plenty of power-handling capacity and can get surprisingly loud, making 
it ideal for practice with other band members in a controlled volume environment. The sound is clear and balanced, 
allowing your playing style and character to come through without coloration.

3 Band Equalizer
The 3-band equalizer features carefully selected frequency bands that are ideal to bring the natural character 
of your bass guitar while providing a wide range of sounds and tonal character.

Mode Button
Mid-frequency cut, combined with low-and- high-frequency boosts that offer a fat pleasing tone, useful for slap 
style playing, low-volume practice.

Aux In & Headphone Out
The Auxiliary input allows you to connect your smartphone or digital music player to the amplifier and play along 
with your favorite music. The headphone jack can be used to practice late at night or in quiet environments, 
making the CM20B a versatile amp that can be used in variety of playing situations.


INPUT VOLTAGE:	Varies Depending on the Region
POWER OUTAGE:	20W R.M.S.
SPEAKER:	8" 4 Ohm
DIMENSIONS:	315mm(W) x 210mm(D) x 305(H)mm
WEIGHT:		6 kg

The new CM20B & CM40B from our CM Series are the compact versions of our best selling CM150B bass amplifier, 
developed to satisfy players looking for solid build quality, simple and direct user interface, and superb-
sounding tones in an affordable, compact, rock-solid package great for playing at home or for smaller venues.

40W Bass Amplifier
The CM40B is CM series with compact size, modern design, and powerful sound. It's designed to meet both beginners 
who are just starting to play and those who want to have a sleek, compact amplifier. It is characterized by its 
versatility to digest a wide range of genres.

10" Speaker
The compact 10” speaker is efficient with plenty of power-handling capacity and can get surprisingly loud, making 
it ideal for practice with other band members in a controlled volume environment. The sound is clear and 
balanced, allowing your playing style and character to come through without coloration.
Two Mid Knobs

Two Mid Knobs
The CM40B features two controls for the all-critical midrange: Low Mid and High Mid. This allows for the player 
to fine-tune the mids to best suit the type of instrument to his/her liking and expand the tonal range of the 
amplifier. In conjunction with the Treble and Bass controls, the two Mid controls will provide a wide range of 
sounds suitable for virtually any playing style and musical genre.


Mode Button
With the mode button, You can select between clean and gain modes. The red LED illuminates when in the Gain 
mode and the Gain knob will control the amount of preamp overdrive/distortion.

Gain Control
Adjusts the incoming signal level from bass, optimizing the preamp signal level for a variety of basses.

Bright Button
Adds presence and shimmer in the upper frequencies.

Aux In & Headphone Out
The Auxiliary input allows you to connect your smartphone or digital music player to the amplifier and play 
along with your favorite music. The headphone jack can be used to practice late at night or in quiet 
environments, making the CM40B a versatile amp that can be used in variety of playing situations.

Preout on Rear Panel
Balanced output to connect to external devices such as PA systems and recording consoles. The level and tone of 
the Preout signal are affected by all preamp controls, including Gain.

INPUT VOLTAGE:	Varies Depending on the Region
POWER OUTAGE:	40W R.M.S.
SPEAKER:	10" 4 Ohm
DIMENSIONS:	375mm(W) x 270mm(D) x 365(H)mm
WEIGHT:		9.7 kg