Get My Options
Get My Options
PROFESSIONAL INSTALLATION · PREMIUM PRODUCTS · TRUSTED SINCE 2000
Mon–Wed 9–6Thu–Fri 9–5Sat–Sun Closed
OEM+ System Overhaul · Belleville · Metro East & St. Louis

Looks Stock.
Sounds Anything But.

OEM+ is a complete overhaul of your factory system that keeps the cabin looking untouched. Better speakers in the factory locations, clean amplification, and a DSP that ties it all together and tunes it to your vehicle. The subwoofer is your call: keep it completely hidden, or build out your whole trunk. Either way, your factory radio and controls stay exactly as they are.

Get My Options Call 618-222-2234
Looks FactoryNothing visible changes
Engineer on StaffWe solve the hard integrations
DSP-TunedBalanced for your cabin
Since 200027 years of clean installs
What Is OEM+

A Complete Factory Sound System Upgrade

Better sound does not mean tearing out your dash. OEM+ keeps your factory screen, controls, and warranty, and rebuilds everything behind them. We replace the weak factory speakers in their original locations, add clean amplification and a subwoofer, and integrate it all with a DSP so the system performs far beyond stock while looking exactly like it left the showroom. It is the upgrade you feel every drive and no one else can see.

What Goes Into It

The Complete OEM+ Build

Speakers

Better Speakers, Factory Locations

We replace the thin factory speakers with quality components that drop into the original openings, so your doors and panels stay completely stock.

Power & Bass

Amplification & a Subwoofer

Clean power and a subwoofer add the depth your factory system never had. Keep it completely hidden, or build out your whole trunk. Your call.

Tuning

DSP Integration & Tuning

A DSP corrects the factory signal and tunes every speaker to your exact cabin, so the system is balanced and accurate, not just loud.

Integration Done Right

Why Modern Vehicles Need a DSP

Modern vehicles are not built to be upgraded. The factory tunes the system around its own speakers, baking equalization, crossovers, and time correction into the signal before it ever reaches them. Swap in better speakers without addressing that, and you are fighting the vehicle instead of improving it.

A digital signal processor, or DSP, is how we fix that. It takes the altered factory signal, corrects it back to a clean and accurate starting point, then lets us tune every speaker on its own. Crossovers, equalization, and time alignment are dialed in for your exact vehicle and where you sit, so the sound reaches you the way it was meant to.

This is what lets premium sound hide behind a completely stock dash and still perform like a properly engineered system. A DSP is the difference between louder and better. Proper integration takes the right tool, and the DSP is it.

Per-Speaker Crossovers

Each speaker plays only the range it handles best, so nothing is strained and nothing is muddy.

Precise Equalization

We flatten the factory curve and rebuild it correctly, so the system sounds balanced instead of boomy or harsh.

Time Alignment

Sound from every speaker reaches your seat together, putting the stage in front of you instead of down in the doors.

Why Drivers Choose OEM+

All the Sound,
None of the Giveaways

  • Every upgrade hidden in the factory locations, so the cabin looks untouched.
  • Your factory radio, screen, steering controls, and backup camera all keep working.
  • Quality speakers, clean amplification, and a subwoofer matched to your vehicle.
  • A DSP corrects the factory signal and tunes the system to your exact cabin.
  • Electrical engineers on staff for the integrations other shops cannot do.
  • The same local Belleville shop, doing clean installs since 2000.
Get My Options
What Our Customers Say
★★★★★4.7 / 5· 130 Google reviews
Common Questions

OEM+ FAQ

Will it look like anything was changed?

No. Every component goes into the factory locations and the original panels go right back on. From the driver's seat it looks exactly like stock.

Do I keep my factory radio and screen?

Usually yes. OEM+ is built around your factory radio, screen, and controls. If you want a new screen we can add one, but it is not required.

Does OEM+ include a subwoofer?

Typically yes. A subwoofer is one of the biggest improvements. We can keep it completely hidden so nothing changes back there, or build out your whole trunk as a showpiece. Your call.

What does a DSP do?

It corrects the processed factory signal and tunes every speaker to your cabin, which is what makes the upgrade sound balanced and accurate instead of just loud.

Will it void my warranty or break my backup camera?

No. We integrate around your factory electronics, so your warranty, cameras, and controls all keep working.

What does an OEM+ system cost?

It depends on your vehicle and how far you take it. We scope and quote it after we understand your goals. Done right it is an investment, and a full OEM+ build can run more than a visible custom system.

Want Factory Looks With Real Sound?

Tell us your vehicle and what you listen to, and we will scope your OEM+ build.