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Description
Middle Atlantic MRK Series 44RU Open-Frame AV Rack with Back Door - 26in Depth, 22in WidthFrom the industry leading MRK Series, this 44RU Open Frame AV Rack delivers enduring performance on large scale, multi bay installations. Built for rugged environments, it combines a compact footprint with maximum rack capacity, enabling installers to consolidate gear and reduce site clutter. The 22 inch width and 26 inch depth accommodate deep AV processors, matrix switches, power distribution, and media servers, while the open frame design promotes
From the industry-leading MRK Series, this 44RU Open-Frame AV Rack delivers enduring performance on large-scale, multi-bay installations. Built for rugged environments, it combines a compact footprint with maximum rack capacity, enabling installers to consolidate gear and reduce site clutter. The 22-inch width and 26-inch depth accommodate deep AV processors, matrix switches, power distribution, and media servers, while the open-frame design promotes superior airflow for critical equipment. Seismic certification adds peace of mind in regions prone to vibration, and the full-height back door provides secure, accessible wiring, maintenance, and service. Whether you're outfitting a control room, broadcast rack, or large conference venue, MRK Series racks are designed to work as hard as your team does.
- Rugged, space-saving frame: The MRK 44U rack uses heavy-duty construction with precision-welded seams to deliver a sturdy framework that maximizes floor space while supporting substantial equipment loads, racks, and accessories.
- Seismic-certified reliability: Engineered to meet seismic requirements for commercial installations, the MRK Series delivers dependable performance in high-vibration environments, helping protect critical gear during earthquakes or tremors.
- Generous 44U capacity: With 44 rack units, this open-frame enclosure accommodates a wide array of gear—from AV processors and matrix switches to patch panels and power distribution units—reducing the need for multiple enclosures on complex jobs.
- Open-frame design with back access: The open-frame architecture promotes excellent airflow and straightforward equipment installation, while the back-door access enables secure rear wiring and service without removing front panels.
- Flexible mounting and cable management: Adjustable rails, configurable mounting points, and integrated cable management features streamline installation, improve cooling, and simplify future upgrades as your AV system evolves.
Technical Details of Middle Atlantic MRK Series 44RU Open-Frame AV Rack with Back Door - 26in Depth, 22in Width
- Rack capacity: 44U
- External dimensions: Width 22 inches, Depth 26 inches; Height approximately 77 inches (44U at 1.75 inches per RU)
- Construction: Heavy-duty steel framing with durable powder-coated finish
- Front/back access: Open-frame front with full-height back door for secure cable entry and service access
- Seismic certification: Seismic-rated for reliable performance in compliant installations
How to install Middle Atlantic MRK Series 44RU Open-Frame AV Rack
Follow these steps to ensure a proper, safe installation that optimizes airflow and equipment longevity.
- Plan the layout by identifying the equipment weights and thermal needs. Confirm the mounting rails are aligned for a 19-inch equipment footprint and ensure adequate clearance for door operation and cable routing.
- Prepare the location and mount the rack on the floor or within a suitable supporting structure as required by local codes and project specifications.
- Install the vertical mounting rails. Align rails to the top and bottom mounting holes and secure with the provided hardware, ensuring rails are plumb and level to support heavy components.
- Arrange and mount equipment from bottom to top, starting with power distribution and then adding processing units, media players, and I/O modules. Leave sufficient space around heat-generating devices for airflow.
- Route power and signal cables through integrated cable management channels and into the rear access area. Use cable ties and spacers to keep cables organized and avoid obstructing vents.
- Close the back door if applicable and verify that airflow remains unrestricted. Check cable slack, power connections, and boot-up sequences for each device, and test system functionality as a whole.
Frequently asked questions
- Q: What does 44U mean? A: It refers to the rack's capacity, measuring 44 rack units (44 x 1.75 inches) of vertical space for mounting equipment.
- Q: Does this MRK rack come with a back door? A: Yes, this model includes a full-height back door to provide secure access and easy cable management from the rear.
- Q: Is the MRK Series seismic-certified? A: Yes, the MRK Series is designed to meet applicable seismic certification requirements for installed environments.
- Q: What types of equipment can fit in 44U open-frame? A: A wide range of AV components such as processors, amplifiers, patch panels, power distribution units, racks, and small-format media servers can fit, depending on their dimensions and mounting depth.
- Q: Is air flow optimized in MRK open-frame racks? A: The open-frame design promotes airflow, and the 26" depth helps maintain clearances for cooling along the rear and front planes.
Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.3 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 4
Too Dry.
Format: Hardcover
This was a required textbook for my class in college. I think it was too dry.
The book titled Deep Learning: From Curiosity To Mastery is much more approachable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
★★★★★ 5
Comprehensive! The Bible of Deep Learning!
This book has by far surpassed my expectations! I have purchased many machine learning and deep neural network books in the past, but nothing has ever come close to this book! First of all, it is written by the fathers of Deep Learning, and is therefore an authority. Secondly, the book is broken into three parts: 1. A math overview and refresher. 2. Deep Learning applications and 3. Research in Deep Learning. I can't help but go through this book from front to back. It is a smooth read, and every sentence written is meaningful. These guys know their stuff! And after you read this book, YOU WILL ALSO know your stuff!
If you feel daunted by the price, just remember, you get what you pay for! I'd say they could easily charge about $300+ for this book, but they are doing everyone a very kind favor by ONLY charging this reasonable amount. You get A LOT of bang for your buck with this purchase. I hesitated at first about buying this book because of the price, but I am soooooo happy that I did! Worth every penny! Look no further, get this book and start your Deep Learning journey!!
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Reviewed in the United States on July 14, 2017
★★★★★ 1
A rushed, poorly written guide of how the "experts" can't really explain what Deep Learning is
Format: Hardcover
This book, in every sense of the word, is rushed. I think the authors wanted to establish themselves as leaders of this young-ish field, but does so by sacrificing quality. It also shows that Deep Learning theory has been there for a long time, known by another name called Neural Networks. The interesting algorithms are of MLP, Back Propagation and the classical neural networks. The optimization methods such as Adam are the ones that are new and interesting, and the only ones worthy of in this book. So, essentially, what you get from this book is use A for X, B for Y and C for Z type of dry, un-intuitive, badly written waste of paper.
As for the structure of the book, it's like an example of how not to structure a book. It has some linear algebra, probability at the start (not good enough, and confuses more people and wastes paper). Goes on to prove other algorithms such as PCA (yeah, ok!). Then, talks about how this architecture works for this and that architecture.
So, yeah, if you really want to try out deep learning, don't buy this book. Set up Tensorflow/pytorch/ other library, run the tutorials, find an architecture for the problem you are interested in and start tweaking that. You will have far more fun and would have saved your money.
The praise that this book gets is beyond me. Did Musk even read this book? I doubt it.
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Reviewed in the United States on May 15, 2018
★★★★★ 5
The classic textbook on Deep Learning
Format: Hardcover
Deep Learning is the promising direction towards general purpose effective artificial intelligence.
There is an explosion of fruitful research in recent years and a lot of applications pursued mainly from technology giants as Google, Amazon, etc. and outstanding research institutions.
The book "Deep Learning " by Ian Goodfellow, Yoshua Bengio, Aaron Gourville, is an excellent piece of work.
They manage to present rather difficult things in an understandable manner. The theoretical presentation is outstanding typical of "classic" books. Also, the book stays close to the practical applicability of all the methods and discusses applications extensively.
There are a lot of other useful books on deep learning that follow a more practical approach by focusing on a particular deep learning software package, but this one book is certainly much more essential since it provides the required theoretical background in order to be able to do serious work on deep learning.
I consider the book as "must have" for anyone that works on deep learning either in an academic or in an industrial environment.
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Reviewed in the United States on August 25, 2018
★★★★★ 5
100% Recommend
Format: Paperback
Invincible Compendium One completely lived up to the hype. From the very first chapter, I was hooked by the story, the action, and the character development. What starts off feeling like a classic superhero story quickly becomes something much deeper, darker, and way more emotional than expected.
The artwork is incredible and the fight scenes are intense without feeling repetitive. Every character feels important and layered, especially Mark and Omni-Man. The pacing is excellent for such a massive collection, and it’s hard to put down once you start reading.
If you’re a fan of superhero comics but want something with real stakes, shocking twists, and strong storytelling, this is absolutely worth reading. Easily one of the best graphic novels I’ve picked up in a long time.
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Reviewed in the United States on May 23, 2026
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