OUR CORE SERVICES
Before
After
UPGRADES
Get true audiophile transparency with better parts and crossover modifications. We do the work that other upgrade companies will not do.
REPAIR
Meticulous restoration and repair for passive speakers of all ages. From dried surrounds and damaged drivers to crossover failures and cabinet issues, we bring your speakers back to reliable, musical life.
RE-DESIGN
Targeted technical adjustments to refine voicing, tonal balance, imaging, and soundstage. We upgrade drivers, optimize placement and time alignment, and redesign crossovers to improve phasing and driver interaction.
Speakers we have worked on
Acoustic Research, ADS, Advent, Altec Lansing, B&W, Bag End, Bose, Cerwin Vega, Definitive Technology, Dynaudio, Electro‑Voice, Infinity, JBL, KEF, Klipsch, Magnepan, MartinLogan, Mirage, Mission, Paradigm, Peavey, Polk Audio, Snell, Tannoy, Vandersteen, Wharfedale, and many more.
Why Upgrade Your System?
Speakers are the heart and soul of your system.
No other component changes your sound as much as your speakers.
Inside every upgrade: precision-matched components for better sound.
Technical Excellence
Engineer and Design
We utilize advanced acoustic modeling and material science to optimize every component of your speaker system for maximum fidelity.
HI-FI MODIFICATIONS
Our team specializes in cost-effective upgrades that transform consumer-grade systems into audiophile-level performers without breaking the bank.
RESTORATION & REPAIR
We restore and upgrade vintage, current, and professional speakers to keep their original vibe while adding refinement, preserving technical integrity, and improving sonic clarity.
Real Results from Real People
Tim is a lifesaver. He expertly restored my worn 1970s speakers by salvaging the original drivers and upgrading the crossovers. They now sound incredibly clear with powerful bass. For honest and high-quality audio work, he is hands down the best in the business.
Bill F. – St. Louis
“My B&W Matrix 800s were missing their tweeters and crossovers. Just last year I found Tim, and he matched a great set of Morel tweeters and replicated the original crossovers with improvements for the tweeter and phasing. I couldn’t be happier.”
Mike M. – Las Vegas, NV
“I brought Tim my 55-year-old Pioneer CS-63DX speakers. He replaced all the capacitors with modern, long-lasting ones. I was surprised how affordable it was, and they definitely sound better than ever!”
Dave H. – St. Peters, MO
“Tim built me a custom audiophile speaker with high-sensitivity pro parts in 1986, and I loved them for years. When my 500-watt amplifier failed, it took the speakers with it. Now almost exactly 40 years later I brought Tim my cabinets back and he built another custom 15-inch, 3-way pure audiophile speaker. I can’t believe I own speakers of this quality.”
Tony B. – St. Louis
“My parents have a beautiful pair of JBL L100T speakers and I wanted them upgraded. Tim replaced the foam and did some updates—WOW, these things sound great!”
Rabia H. – Los Angeles, CA
"I've had the fortune of Tim teaching me high end through my audio journey. Whether a 2a3, EL34, 6550, Pass Labs, Technics Digital and many speakers, including his own 3-way MTM that mated so well with my CJ Premier 11a that I regret losing them. I can still hear the top end floating in the air to what seemed like forever. He has a passion. Rest assured you can trust him. He'll help you get the sound you never thought possible and always at a great price."
Ed S. – Tampa, FL
Get in Touch
info@speakerupgrades.com
Location
St. Charles, Missouri · 636-443-5233
