Centro-Force: Precision Sound Upgrade MODs
Currently introducing the HD800S-CF Upgrade.
For "higher than stock" audiofile clarity.
Website now updated weekly.
Details in Technology tab
Current status:
Now selling Mod kits!
Our Current Services
New! MOD KiTs Available!
Also "new In Box" HD800sCF variant
The HD800S Redesigned
Unique and new mod to exceed original design performance!
Engineering
We are a team currently known on as "Maxx134" and "whitigir on various sites, and have combined technologies to create a true "upgrade Mod" for the HD800 variants.
The upgrade consisting of both a New "Acoustic cavity" on the rear, and powerful "multi-element" core on the inside (Click on Technology page for details), working "in tandem" for new performance gains. The highest quality US sourced materials are employed, for lifetime performance.
The result is a "first of its kind" monumental upgrade, differentiating itself from all other "mods" and/or variants.
Update 2026:
We are moving onto next stage and now will be selling kits, with YouTube instructional links upcoming.
Kits require moderate technical competence for installation.
This kit is a true & significant upgrade, more so than anything before it. The technology behind this is in "Technology Tab".
Update May: video links & clarifications. Promotional period extension
Kits available NOW
Promotional period price $200 After this period, it returns to $300
To BUY KIT NOW
Press "Buy Now" button below, for quantity & color selection options:
Upon completion You will recieve emails on confirmation, and also shipping ETA.
Bulk order discounts for kits above 5 are not automatic yet, so large order discounts will be refunded after.
Discounts for bulk installers are:
5+@20%, 10+@35%, 20+@50%
To buy a NIB HD800S-CF Headphone (special order below):
To special order, email or call in and ask for Wayne or Jason @ "The Source AV Design Group" below, specifying that you want to place order for 800sCF headphones.
Promotional period Pricing around $2000 & Final Pricing TBA
Allow 2 weeks lead time for shipping
To Inquire for custom install of your used headphone:
Based according to our limited scheduling ability, for an initial period we will accept installation of the upgrade on your headphone.
Email us (whitigir@yahoo.com) for details on availability & pricing.
Also, for those who rather buy new unit installed, see below:
Click Technology Tab for more info
Contact for further info
Contact
whitigir@yahoo.com
ABOUT US:
The Centro-Force name came from our teamwork design. It evolved from the improved center driving forces that enabled a more evolved extension to the rear. AKa, "Centro Force". So our name has a meaning attached to the foundations of this Mod.
We are Enthusiasts and listening to Music is our hobby, chasing what we love. Seeking a "reference" headphone that can "do it all" to reproduce everything in the Recording, as Natural and real as possible, without lacking bass or Musicality.
In our Opinion, a true "Reference" should be as Realistic & Natural as possible. From all our experiences with so many different headphones, Desktop and Portable alike, we opted for the HD800, for how Natural and Neutral it is, over all others. But the HD800/800S are now considered Ancient. We have always wished for a true successor to the 800/800S. How about an upgrade with the Dynamics of a Utopia, the staging of the 800/800S, and the detailing/resolve rivaling any TOTL IEM, for a start?... And so our quest began, and ACHIEVED!
For many years, others have tried to find ways to improve the 800/800s, but our "upgrade" work has never been accomplished before. Our work is not a "tuning mod", but a real performance upgrade. With our collaboration of being "open minded", with an "outside the box" approach, the ultimate goals of bringing the 800/800s to newer Heights were accomplished.
Finally, we arrived at Something that restores real Sub-Bass/Mid Bass, while keeping mids natural and as close to stock as possible, and finally cleaning up the high frequency issues (phase shifts, ringing & other parasitics which introduced harshness). These past issues, annoyances, and distortions that plagued the 800s were resolved (not masked like past tuning solutions), by controlling the "Upper Spectrum", extending its control all the way to 22Khz.
In the end, we have achieved a more correct Bass, natural mids, and airiness, with detailed highs giving clarity without harshness, like never before... A greater soundstage, resolution, Dynamics, and flawless Impulses Responses. No words can express enough of how fruitful the Centro-Force is from the results of our hard work. The one thing we are so sure of is that, if we enjoy it this much, so will you.