Dennis Yu

Need some high-performance headphones? Check these out!

Bruce Forbes of Equation Audio sent us 3 sets of his awesome headphones for review.  In his words…

The RP-22Xs were developed after we had perfected the RP-21s as far as that design topology and material integration would allow.  The thing that is selling these headphones is they compete extremely well with many competitive models that are more expensive, yet considered inferior in performance.  Subjective?  Yes!  But the total numbers chosen at blind shoot-outs held around the country don’t lie.  RP’s win over 80% when compared to headphones at or above their published MSRP.  And well over 50% when compared to competitive models costing as much as 40% more.  Granted, there will always be subjective opinions that vary per headphone and are even dependent on the sound source, type of music, etc.  But there is often a pleasant surprise to hear such great reproduction in general from a new brand because there have been no serious alternatives to the major brands, only an increasing number of confusing models designed for arbitrarily designated applications.

The majority are purchased by musicians for tracking during sessions, same for engineers and they are very popular when the tracks go through the final mix and mastering process, particularly on the growing home studio front, where many DIY artists and engineers master their own CDs.  Our number one application for the RP’s is tracking, with growing use in the HiFi market.  The RP-21 is smooth throughout the frequency bandwidth (about 20Hz-22kHz). Although they respond below and above that, the roll-off considerations make listing them useless for most practical applications.  We make fun of the ‘hype’ in the industry by listing a fantasy or some other comical response specification, because many companies list response frequencies below 10Hz, even 5Hz (more a feeling), and above 22kHz, in ranges bats and porpoises have yet to verify.

The public response for us taking the ‘let’s get real’ position has been overwhelmingly positive. Overall, the RP-21s produce low aural and physical fatigue, generating pleasing, relatively accurate reproduction of most sources.  There’s very little ‘hype’ though some have remarked they felt the bass was augmented a bit.  We would agree except during in-house tests with similarly priced and type competitive headphones, the 21s tend to get high marks for bass response sounding closer to a good pair of soffet mounted or larger near-field speakers in a well-treated room.

However, the RP-21s didn’t seem to deliver sufficient ‘ballistic’ responses such as those associated with percussions and bass instruments requested by many extreme users, especially drummers and bass players, so we decided to create a product with those applications in mind.  We started with the RP-21 ear cups and added a higher mass diaphragm, coiled to accept more power, and added a dual element ear pad that has a port or ear opening designed to compliment the acoustics and deliver more low-frequency punch.  This enhanced low-frequency response along with the added power handling capability provides an increase in percussive ballistics and bass signals of all types, without adding the typical sack of mud that some other competitive models reportedly add to the mix.  Bear in mind this added bass and percussive response does not complement mixing multi-track recordings or listening to a well-recorded orchestra.

RP-22X’s are not as flat or smooth as the RP-21, though you can boost the drum (ballistic mixes and bass instrument mixes) and rock on, The X is for extreme.  Remember to carefully elevate the volume to prevent accidental dangerous SPL- you rarely recover from nerve damage, and never return to ‘good-as-new’ when you damage the tympanic membrane (ear drum), so I harp on the be responsible theme, even on the packaging.  Be kind to your ears and your future – use headphones responsibly!

The only time I prefer the 22x’s is when I want more kick and then I EQ or add the highs and mids I want to compensate for, producing quite an energetic and pleasing mix, though this is for limited use, due to prolonged higher SPL applications.

All things considered, the RP-21 and 22X headphones sell at a street price that literally blows away same-priced headphones and seriously challenges many headphones that are priced higher.  That’s our mission and with these two products, we have well achieved our goal.


Dennis’ comment: If you want us to review your stuff, send it to our office address at:

BlitzMetrics LLC
1490 W 121st Ave, Suite 101
Westminster, CO 80234

We don’t guarantee that it will be a positive review, but you will get at least a PR5 link.

Dennis Yu

Dennis Yu is co-author of the #1 best selling book on Amazon in social media, The Definitive Guide to TikTok Ads. He has spent a billion dollars on Facebook ads across his agencies and agencies he advises. Mr. Yu is the "million jobs" guy-- on a mission to create one million jobs via hands-on social media training, partnering with universities and professional organizations. You can find him quoted in major publications and on television such as CNN, the Wall Street Journal, Washington Post, NPR, and LA Times. Clients have included Nike, Red Bull, the Golden State Warriors, Ashley Furniture, Quiznos-- down to local service businesses like real estate agents and dentists. He's spoken at over 750 conferences in 20 countries, having flown over 6 million miles in the last 30 years to train up young adults and business owners. He speaks for free as long as the organization believes in the job-creation mission and covers business class travel. You can find him hiking tall mountains, eating chicken wings, and taking Kaqun oxygen baths-- likely in a city near you.
I'm a member of Blitzmetrics Academy and a friend of Dennis to boot. Not only is Dennis highly intelligent and full of great and creative ideas, he's also incredibly generous with both his knowledge and his time. Success couldn't come to a better guy. Thank you for all that you do for the world, Dennis! 🙏

Michael Pacheco


Thanks 🙏 for being shining light in this industry. Love what your building for works overseas too network for jobs so innovative. Dennis helped me navigate having bad experiences with marketing agencies and doing dollar a day marketing which has helped my personal brand tremendously. Highly recommend.

Eric Skeldon

Founder at Kingdom Broker

Working with Dennis has been a delightful experience. After meeting him in 2015 I got to collaborate with him on countless occasions. His understanding for state-of-the-art marketing, his implementation, and his leadership put him into the top 0.01% of marketers and mentors.

Jan Koch

Ihr kompetenter Partner für innovative KI-Strategien.

I had the pleasure of interviewing Dennis for my podcast in 2021 and since then we have maintained a friendship that grows with each interaction. I have seen Dennis' devotion to his friends and clients firsthand, and our conversations often result in us talking about how we can provide more value to the people around us. He is someone whom I can ask questions on a technical level, and look to on a personal level. If you have any hesitancy about hiring him, get over yourself and do it!

Isaac Mashman

Help scaling personal brands.

Geez, where do I start recommending Dennis? First, he is an absolutely brilliant marketer who understands where marketing is today and where it's going tomorrow. He also has an incredible passion for the International Worker community. The lessons he has taught me from his almost 20 years of experience hiring International Workers have been immense. Most importantly though. Dennis Yu is someone who wants the absolute best for you and is willing to tell you the truth. Dennis sat with me at a point in my business where I was floundering but did not want to admit it. He asked some very straight forward questions to get me to admit my issues, highlighted the issues, and then helped me create a roadmap to success.

Atiba de Souza

International Keynote Speaker | Video Content Superman | Superconnector |

Dennis, which I had the pleasure of working with is one of the most giving, honest and tell you as it is person I ever know. The knowledge this man has is remarkable and he just gives it out freely. He is not pretentious and always entertain anyone big or small in the industry always willing to help. If you ever get a golden opportunity to work with him or mentored by him say YES!. You will notr regret Dennis, which I had the pleasure of working with is one of the most giving, honest and tell you as it is person I ever know. The knowledge this man has is remarkable and he just gives it out freely. He is not pretentious and always entertain anyone big or small in the industry always willing to help. If you ever get a golden opportunity to work with him or mentored by him say YES!. You will not regret

Nixon Lee

The PR Whisperer

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