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2020 Ram 4500
Your 2020 Ram 4500 has a factory-integrated screen that runs everything in the dash — a full head-unit swap isn't possible, so the build routes around it using an integration adapter to pull a clean signal for your aftermarket components. From there, you're doing a complete system: upgraded speakers in every door, clean power from an aftermarket amplifier, and a dedicated subwoofer tucked under or behind the rear seat in a custom enclosure built to its specs. Because you're on a premium budget and installing it yourself, there's no reason to stage anything — a full system build done at once is more satisfying and more cost-effective than doing it in phases. The factory system was designed to be adequate; this build is designed to sound like it was built for the way you actually listen.
The upgrade path
4 steps · ordered by impact · with DIY difficultyYour 2020 Ram 4500 has a factory-integrated dash, so a head-unit swap is off the table even on a premium budget — the controls and display are built into the panel. For a full system build with no compromises, a high-quality integration adapter or DSP is the piece that matters, extracting a clean signal from the factory unit so the front stage, rears, amplifier, and subwoofer can all be dialed in around it. On a build this complete, the DSP is what ties the system together and gives you the tuning control to blend every stage precisely. Whether a factory amp is already present is unconfirmed, so confirm it rather than assume. Done yourself, it's a doable step since the adapter interfaces with the factory harness rather than cutting into it.
Why it’s the pick: This is the converter I reach for first on any factory deck that isn’t already amplified. It takes the speaker-level signal off the back of the radio — up to a hot 40V/400W per ch…
Speaker sizes in your 2020 Ram 4500 are unconfirmed — measure the front door openings before ordering: diameter, mounting depth, and whether there's a factory adapter ring in the way. For a full system build at this budget, go with component sets up front: separate woofer and tweeter give you real imaging and clarity that coaxials don't. The fitment shows no rear fill location in this configuration, so the front stage is the entire speaker picture — which makes driver quality even more critical. Choose components with enough sensitivity to run well on their own and scale cleanly when the amp is installed. At a premium budget, this isn't the place to cut corners: a great front stage is the biggest single upgrade a truck audio system can get. The Best Car Speakers by Size guide is organized by size once you have your measurements.
Why it’s the pick: The 5030cx has been my reliable 5.25" component pick for years because it threads the needle: easy to power on a deck but scales cleanly with an amp. Infinity’s edge-driven textil…
Your 2020 Ram 4500 has no trunk and no factory subwoofer, so the sub goes in the cab — under or behind the rear seat in a custom enclosure built to that driver's specifications. Shallow and slim-mount drivers are made for this placement: they deliver real low-end without requiring enclosure depth that would eat into seat travel or cab usability. At a premium budget, a proper subwoofer in a properly tuned custom enclosure is the correct choice — not an all-in-one powered box. The enclosure volume and port tuning (if ported) make a real difference in how the sub integrates with the rest of the system. The Best Slim / Shallow Subwoofers guide covers drivers built for this exact install.
Why it’s the pick: Shallow subs used to be compromises. Not anymore. Hertz re-engineered the MPS for the slim form factor rather than shrinking a standard design, which is why it behaves like a “rea…
For a full system build at a premium budget, an aftermarket amplifier isn't optional — it's the engine of the system. The factory amp status on your 2020 Ram 4500 is unconfirmed, but the answer is the same either way: the new speakers and subwoofer need clean, properly rated power, and the factory system can't deliver it reliably. Plan one channel for each speaker in the build plus a dedicated mono channel for the subwoofer. That can be a single multi-channel amp with enough channels, or a stereo amp for the speakers and a separate monoblock for the sub — both are legitimate depending on the power ratings you're matching. Because the 2020 Ram 4500's head unit is integrated, signal gets to the amp through an integration adapter. Match the amp's RMS output to the speakers' ratings and you'll have clean headroom across the board.
Why it’s the pick: If you’re keeping the factory head unit or a factory-amplified system, the D-Series makes life easy. Active speaker-level inputs and signal summing handle odd factory crossovers,…
2020 Ram 4500 audio — common questions
What is the best subwoofer setup for a 2020 Ram 4500?
No trunk, so bass lives in the cab — a shallow/compact sub fits under or behind the rear seat, or in a truck-specific enclosure.
Can you replace the head unit in a 2020 Ram 4500?
The 2020 Ram 4500 uses a factory-integrated screen, so the move is to keep the screen and integrate a clean signal with the right vehicle-specific adapter — not a head-unit swap.
Everything on CarAudioNow for your 2020 Ram 4500
Fitment is a guide, not a guarantee. Speaker sizes and fit details are based on your selected year, make, model, and audio package and can vary by trim, options, and prior modifications — always confirm before buying.
Your plan is guidance built from your selections (vehicle, goal, budget), not a guarantee of fit, sound, or results, and not a substitute for professional installation advice. Prices are pulled from retailers and may change at checkout.
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