- Popular Brands
Open Box
Open Box Markbass CMB 121 Black Line 1x12 150W Bass Combo Amplifier Level 2 197881396046
Videos (1)
View All
Markbass CMB 121 Black Line Combo Bass Amplifier | Demo and Overview with Allee Fütterer

Description
The Markbass CMB 121 Black Line 1x12 150W bass combo amplifier provides the perfect sound for students and beginners to hone their skills, with enough power for gigs. Markbass delivers their signature rich low end in an intuitive package, so you can focus on technique and expression. With the CMB 121, you get great tone that responds dynamically to your playing, helping build confidence and passion.
Start With Great Tone to Develop Your Talent
When first learning bass, it's crucial to have an amp that sounds and feels inspiring to play. The CMB 121 combo delivers the famous Markbass tone in an affordable package, with 150 watts of power to hear every nuance. It satisfies the need for a dynamic, quality sound that keeps you engaged through long practice sessions. You'll get the most out of daily rehearsals with an amp that brings out the best in your developing style.
Practice Anywhere With Headphone and AUX Inputs
The CMB 121 Black Line allows you to practice bass even when you can't play out loud. Just plug your headphones into the dedicated output and you'll get Markbass tone straight to your ears. The AUX input lets you mix in audio from phones, tablets or music players. You can play along with your favorite songs or drum loops without disturbing others—perfect for practice on the go or late at night. It's easier than ever to put in the time and get better.
Intuitive Controls Dial in Your Sound
Shape your tone with the simple, musical controls on the CMB 121 combo. It features a classic 4-band EQ, plus two Mid frequency knobs for detailed tweaks. Scoop out mids or add some edge with the "Scooped" switch or hit the "Boost" for more growl and saturation. Whether you want a smooth, warm sound or an aggressive slap tone, it's easy to find your signature sound.
Gig-Ready Features Let You Plug and Play
Don't let the entry-level price fool you—the CMB 121 Black Line has pro features to handle real gigs. The 150W provide ample volume for rehearsals and shows. Just plug the balanced XLR line out to send your tone to the PA system for more projection. There's also an effects loop to integrate pedals and racks seamlessly into your signal chain. The CMB 121 gives you the tools to sound like a pro when you're ready to perform.



Features
- 150W combo with 12" woofer and tweeter for full-range sound
- 4-band EQ with scooped mids and boost switch for tone shaping
- Headphone out and AUX in for silent practice with media playback
- Balanced XLR out and effects send/return for gigging and pedal integration
Specs
- Speaker: 1x12"
- Output power: 150W
- EQ: 4-band
- Controls: Gain, Master Volume, Scooped and Boost switches
- AUX in: Y
- Headphone out: Y
- Balanced line out: Y
- Send-return: Y
- Dimensions (WxHxD): 17.32" x 17.32" x 14.17"
- Weight: 35.27 lb.
Reviews
4.74
23 Reviews
96%
of respondents would recommend this to a friend
Most Liked Positive Review
Good mid level combo bass amp
I was looking for an amp that is very good for practice, at least usable for small club gigs, won't dominate the living room, and isn't crazy expensive. . Great little amp! makes a bass sound like a bass. 1 ding - the fabric speaker cover doesn't protect the speaker well, and it makes a floppy noise. I would have paid $20 more for a metal grille. (Markbass are you listening?)
Most Liked Negative Review
Awesome low volume tone
I love this amp. It has that low end that Mark Bass is known for. Beautiful tones BUT i took it to an outdoor gig the other day and cranked it. Gain at 8-9, master volume at 8-9. It started clipping and making an awful tone when i plucked too hard. No more gigs with this.
- Home Studio15
- Performances13
- Outdoor Events / Games9
- Amateur Recording5
- Professional Recording3
- Limited Functions1
- Mildly heavy, but thankfully there's a drummer.1
- There is no cons1
- Tone doesn't hold at high volumes1
- No cons.1
- Experienced14
- Novice7
- Professional Musician1
- Excellent Sound20
- Easy To Use19
- Good Power Output19
- Warm / Comfy14
- Portable13
Reviewed by 23 customers
This amp is top tier. Was debating between 3 amps.
submitted9 days ago
byBuck
fromPortland oregon
This amp is worth every penny. Was in debate between a fender rumble 100 and a amped. THIS WON BY A MILE. I feel like I can actually hear the soul of my bass with this amp. Modern yet sophisticated tone. 10/10
Very nice sound
submitted10 days ago
byDoug
fromShelbyville Ky.
Submitted as part of a sweepstakes
Great punch for us guys on a budget wanting a Mark Bass
I would buy this item again. I am very impressed.
submitted2 months ago
byJesus
fromGreen Bay, WI
Submitted as part of a sweepstakes
Clear sound. Very powerful regardless being small and portable.
Great first upgrade
Verified Buyer
submitted5 months ago
byJohn
fromVirginia Beach, VA
Submitted as part of a sweepstakes
I upgraded to this from a rumble 15 that came with a beginner bass kit and it sounds so much better, it's easier to dial in the sound, and there's a lot less noise coming out of it. The size is a little much in an apartment but I make do and have it sitting out of the way enough.
Yes would buy again if I had to.
Verified Buyer
submitted6 months ago
byHector
fromGainesville Florida
Submitted as part of a sweepstakes
Use at home practicing have to say the sound is great.
This amplifier combo rocks
submitted6 months ago
byHector
fromGainesville Florida
At home solo bass player
Q&A
Have a question about this product? Our expert Gear Advisers have the answers.
submitteda year ago
asked byJesse
fromDonna, TX
Does the Gig-Ready Features Like Just plug in the balanced XLR line out to send your tone to the PA system for more projection, mean that you don't need a Direct Box? Or do you still need one to connect to a board?
Yes, it does.submitteda year ago
asked byAdam
fromFlorida
Does Markbass offer a cover for this?
Unfortunately, no.submitteda year ago
asked byLex
fromSan Francisco, CA
Is the XLR line out pre or post EQ?
It's post EQ.submitteda year ago
asked byRock Bottoms
fromFontana Ca
could this amp be used with a keyboard for live performance?
Yes, it can.submitteda year ago
asked byKevin
fromOKC, Oklahoma
Can you run this into/with a 2x10 cabinet
No, there is no ext. speaker capability.submitteda year ago
asked byCat
fromHuntsville, Texas
Can you add another speaker cabinet to this amp, maybe later on?
No, you can't. There is no ext. spkr. output.











