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Cooler Master MasterBox Q300L Micro ATX Tower w/ Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated for Airflow, MCB-Q300L-KANN-S00

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  • I/O panel can be adjusted in 6 different locations and the Case can be positioned: vertical or horizontal
  • Edge-to-Edge Acrylic Transparent Side Panel offers a full view inside
  • Body depth height: can support normal size ATX power supply
  • Front Magnetic Design Dust Filter with open perforated front, top and bottom for high air performance
  • Extra space behind the motherboard tray for hidden cable management

  • Overview
  • Specs
  • Warranty & Returns
  • Reviews
Cooler Master

Choose Your Style

The MasterBox Q300L is your straightforward option in the MasterBox Q-series from Cooler Master, a series that might be small in size but excels in functionality, modularity, and thermal performance.

Cooler Master

System Flexibility

The I/O panel can be adjusted to six different locations—on both side of the body you can install the I/O panel at the front, top or bottom.

Cooler Master

Magnetic Dust Filters

Patterned magnetic filters create a unique look for your chassis while keeping your system's internals free from excess dust.

Cooler Master

Small Form Factor, ATX PSU Support

Despite the Micro-ATX form factor and the body depth/height of only 370 x 370mm, the MasterBox Q300L can accommodate a normal ATX PSU.

Cooler Master

Edge-to-Edge Acrylic Side Panel

Show off your build through the full size transparent side panel.

Cooler Master

Thermal Performance

The open design of the perforated front, top, and bottom guarantees excellent thermal performance.

Cooler Master

Routing Space

A space 28mm-wide behind the motherboard tray offers open space for hidden cable management.

Compare

  Cooler Master Cooler Master
  Q300L Q300P
Product Number MCB-Q300L-KANN-S00 MCB-Q300P-KANN-S02
Available Color Black Black
Materials Steel, Plastic Steel, Plastic
Dimensions, L x W x H 387 x 230 x 378mm 450 x 230 x 450mm
Motherboard Suport Micro-ATX, Mini-ITX Micro-ATX, Mini-ITX
Expansion Slots 4 4
Drive Bays 5.25" 0 0
3.5" HDD 1 1
2.5" SSD 2 2
I/O Port USB 3.0 x 2, Audio In/Out USB 3.0 x 2, Audio In/Out
Pre-Installed Fan(s) Front n/a 120mm RGB LED x2
Rear 120mm x1 120mm non-LED x1
Fan Support Front 120 / 140mm x2 120 / 140mm x2
Top 120mm x2 120mm x2
Rear 120mm x1 120mm x1
Bottom 120mm x1 120mm x1
RGB Controller Included Included
Radiator Support Front 120mm x1 / 240mm x1 120mm x1 / 240mm x1
Rear 120mm x1 120mm x1
Clearances CPU Cooler 157mm 157mm
PSU 160mm 160mm
GPU 360mm 360mm
 
Cable Routing Behind MB Tray 28mm 28mm
Dust Filters Bottom Bottom
Power Supply Support Bottom Mount, ATX PS2 Bottom Mount, ATX PS2
 
 
EAN Code 4719512065488 4719512065518
UPC Code 884102038006 884102038037
Net Weight 3.7 kg 5.2 kg
Gross Weight 4.7 kg 6.4 kg
Carton Dimensions, L x W x H 435 x 276 x 461mm 510 x 277 x 527mm

Learn more about the Cooler Master MCB-Q300L-KANN-S00

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Excellent case... 9/25/2020 5:54:54 AM

Pros: Very light. Easy to work with. Plenty of space for cable management, even with my hard drive mounted back there. Tinted side panel.

Cons: Tinted side panel is acrylic so be careful.

Overall Review: I would definitely recommend this case to anyone looking for a small case with good looks and plenty of space for cable management.

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Anonymous
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Meh 9/24/2020 9:09:21 AM

Overall Review: Its has alright cable management spots. My main 2 issues is that installing new fans is a nightmare and the psu cover is not removable. There are better cases at this price but not a bad budget case overall

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Anonymous
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Micro case 9/23/2020 6:56:52 AM

Pros: Looks great and fits everything perfect, able to run a full size atx 500w rx570gpu and a 2 fan water cooler. Comes with more hardware then needed as well. Good case for the price

Cons: Wish they would have had somthing to out line the fan mounts, little hard to see with the rest of the vent holes

Overall Review: 9/10 case for me

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Ownership: 1 week to 1 month
Verified Owner
4/ 5
Use the right product for the right job 9/21/2020 7:47:16 AM

Pros: Plenty of room for a basic PC build.

Cons: Airflow is lacking, but adequate for a regular ole desktop PC. Adding a GPU would just be asking for thermal problems with how this case is designed. It would become a hotbox pretty quickly.

Overall Review: I would never use this case as a platform for a gaming PC, its just not designed as such. I used this case for a basic desktop computer build for my Dad, and it works great for that. I'll add some pics.

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Anonymous
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Accidentally clicked 4 instead of 5 9/18/2020 10:02:04 AM

Pros: Can't beat the quality for price
2 free decent fans
Great airflow and thermals added 1 exhaust fan but before temps were still good now they're great

Cons: No rubber around cable holes
Fans wont connect to 4 pin rgb have to use controller unless your board has 3 pin argb

Overall Review: Highly recommend

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Anonymous
Ownership: 1 week to 1 month
Verified Owner
1/ 5
Don’t buy! 9/17/2020 8:16:15 PM

Pros: Easy cable management
Compact
Customizable

Cons: Terrible airflow even with decent fans
Front panel does not work
Acrylic scratches easily

Overall Review: Not worth it at all. I should’ve listened to other reviews but the price point got me. I would recommend the dlm21 instead for a couple more dollars. Way better than this junk.

Did you find this review helpful?
Anonymous
Ownership: 1 week to 1 month
Verified Owner
3/ 5
Its good and bad 9/15/2020 10:16:33 AM

Pros: Well to be fair the case is good comes with Dan and great airflow all around

Cons: To compact very weird to set up motherboard inside and it was just awkward io shield needs to fit better but overall 3/5

Overall Review: It was alright

Did you find this review helpful?
Anonymous
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Overall a great budget case 9/11/2020 11:09:29 PM

Overall Review: It’s a good case for the price, I recommend it.

The magnetic dust covers on the top and front will slide when grabbing or moving the case, not a big deal but they do slide around.

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    Ships from United States.
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