TC Electronic MD4 HD Native Review: Honest Mastering Test

TL;DR: The TC Electronic MD4 HD Native is one of the best multiband processors I’ve ever used. Its EQ is cleaner and more transparent than the MD3 PowerCore version, its parallel compression beats DynOne in my tests, and the new DXP mode is genuinely useful for bringing detail forward in a mix. The MD3 PowerCore still wins for me on pure transparent compression, but if I didn’t have the PowerCore and DynOne already, the MD4 HD Native would be a no-brainer.

I’ve been using the MD3 PowerCore from TC Electronic for over 10 years now, and it’s still one of the best multiband compressors in my mastering chain. So when TC Electronic released the MD4 HD Native, ported from the legendary System 6000, I had to test it. Not just on its own, but against the tools I already trust: the MD3 Native, the MD3 PowerCore, and DynOne from Leapwing Audio.

If you’d rather watch the full test with audio examples, here’s the video:

What Is the TC Electronic MD4 HD Native?

According to TC Electronic, the MD4 HD Native is a 6-band EQ, a 5-band compressor with soft clipping, and a true peak limiter, all based on the System 6000. The System 6000 is one of the most respected mastering systems on the planet, used by top mastering engineers, post-production studios, and film mixers around the world. So having a native version of those algorithms running inside Pro Tools is, for me, kind of a big deal.

The plugin is split into four main sections: Main, EQ, 5 Band (compressor), and Output. Each one is color coded, which makes it easy to find what you need quickly.

The Main Section

This is where you set the normalizer gain, control left and right channel volumes, and choose your processing mode. You can run the MD4 in Stereo or Mid/Side, which is great when you want to treat the mono and stereo information independently. There’s also a low cut up to 200 Hz and a detector crest mode where you pick between RMS (for content leveling) and Peak (for transient catching).

The Compressor Modes

The MD4 gives you four compression modes, and this is where it gets interesting:

• Normal — standard downward compression
• Parallel — upward compression with linked channels
• Parallel UL — upward compression with unlinked channels
• DXP — lifts low levels without touching the transients

That last one, DXP, is something I hadn’t really seen in other tools, and I’ll talk about it more below because it’s genuinely useful.

The EQ Section

You get six EQ bands: Low 1, Low 2, Mid 1, Mid 2, High 1, and High 2. You can unlink left and right channels (or mid and side) and treat them individually. Each band can be bypassed, and there’s a clean way to access frequency, gain, and filter type all at once if you want quicker editing.

The 5 Band Compressor

One thing to keep in mind: when you set the master threshold to -8 dB, that doesn’t mean every band is at -8 dB. It means the relative offset of all bands shifts together. If band 1 is at -6 and band 2 is at -10, dropping the master threshold by 1 dB drops them to -7 and -11. Same logic applies to ratio, makeup gain, and release. There’s a global control and there’s per-band control. Once you wrap your head around it, it’s actually pretty intuitive.

The Limiter and Soft Clipper

You get a true peak limiter with several profiles (Universal, Loud, Voice, Soft, Dynamic), a soft clipper you can bypass, and a Compare gain that’s super useful for matching loudness when you’re A/B testing. That kind of detail tells you the engineers actually master music themselves.

How I Tested the MD4 HD Native

For this test I used one of my own songs, one I produced and mixed pretty intensively to give it real 3D space and element separation. That matters because I know exactly how this mix should sound. After working on a track for hundreds of hours, you hear immediately when something tightens the stereo image or flattens the depth.

I matched all the plugins to the original unprocessed mix in terms of loudness, then ran four sets of tests: EQ, normal compression, parallel compression, and the limiter.

EQ Test: MD4 vs. MD3 Native vs. MD3 PowerCore

For the first EQ test I set a band at 8 kHz with +3 dB of gain on all three plugins (just for testing purposes, not because you’d ever actually do that on a master). The MD4 EQ sounded clean and opened the mix up nicely. The MD3 Native sounded almost identical, and a null test confirmed that the 8 kHz area cancels between MD4 and MD3 Native. So those two probably share the same EQ engine.

The MD3 PowerCore version, on the other hand, sounded less transparent. Same frequency, same gain, same filter type. They do not null. To my ears the MD4 EQ opened up the top end more cleanly while the PowerCore version slightly closed it down.

I repeated the test with a 10 kHz shelf at +5 dB and got the same result. The MD4 (and MD3 Native) won on EQ transparency. To be fair, after 10+ years of using the MD3 PowerCore, I almost never use its EQ section anyway. That plugin shines in the compression area, which is exactly what we tested next.

So my first conclusion: the EQ in the MD4 HD Native is one of the best I’ve ever heard in a multiband processor, and it’s better than the EQ in the MD3 PowerCore version.

Compression Test: Where It Gets Interesting

This is the part I was really curious about. I bypassed the EQs, set the same ratio, attack, and release on every band, and aimed for at least 1 dB of compression in the low range. What I wanted to find out: which one keeps the 3D space, depth, and element separation of the mix most intact?

MD4 HD Native: Genuinely impressive. It tightens the stereo image and the depth of the mix just a little, and you lose a small amount of element separation, but overall it’s clean.

MD3 Native: This is where I heard what I hear in most native compressors. After processing, a noticeable amount of 3D space, depth, separation, and transparency is gone.

MD3 PowerCore: Exactly what I expected after a decade of use. Almost untouched 3D space, the stereo image stays in place, the separation between elements stays intact, and you can compress more than 1 dB in the lows without losing the freedom of the mix. This is why I still reach for it after 10 years.

Comparing MD4 directly against the MD3 PowerCore, the mix breathes a bit more under the PowerCore. There’s a small amount of separation lost in the MD4 version. But here’s the thing: the MD4 compressor is really good. The difference is small, and in a blind test I think most people would have a hard time picking them apart.

Parallel Compression: MD4 vs. DynOne

For the past two years, DynOne from Leapwing Audio has been my go-to plugin for parallel compression in mastering. I bought it after reading about it from a mastering engineer I respect, and it turned out the external processor he was comparing it to was the System 6000 from TC Electronic. So when I found out the MD4 HD Native has a Parallel mode, I had to compare them directly.

I matched the settings as closely as possible: same RMS detection, same 2.5:1 ratio, similar attack and release values, same crossovers. And honestly, I didn’t expect to hear a big difference.

I was wrong. The MD4 parallel compression sounded better to me. It kept the transparency and clarity of the mix while injecting something I can only describe as awesomeness. It’s the same feeling I had the first time I tested DynOne two years ago, which tells me native plugin technology keeps moving forward, and that’s a good thing.

I also tested both plugins in normal downward compression mode. Same result: the MD4 preserved the sound of the mix more cleanly, while DynOne pushed the mix in a direction I didn’t really want. I genuinely hope DynOne gets an update soon, because it’s still a good plugin, but right now the MD4 has the edge.

The DXP Mode: Something Different

DXP is a compression mode that lifts low-level details without touching the transients. I hadn’t really encountered this in any other tool I’ve tested.

When I A/B’d the unprocessed mix against the DXP version, the mix felt more present and detailed. At one point I actually thought I’d left the EQ on, but no, it was just DXP doing its thing. There’s also a “Steer” option that lets you shape exactly how the mode affects the material.

I’d use this on softer material and on electronic productions where you want more detail to come forward without squashing dynamics. Cool feature.

Limiter Test and True Peaks

I set the limiter threshold to -1 dB, soft clip to -6 dB, and matched the loudness as much as possible. The MD4 limiter is genuinely decent — better than a lot of limiters out there. But the MD3 PowerCore still gives the mix a bit more freedom, more 3D space, more depth and separation. The difference is small, though.

For true peaks at -1 dB threshold targeting around -10 LUFS (which is hot), here’s what I measured:

• MD3 PowerCore: true peaks reached +1 dBFS
• MD4 HD Native: true peaks reached +0.5 dBFS
• MD3 Native (true peak mode on): true peaks reached +0.3 dBFS

If you’re aiming for -14 LUFS, you’re probably fine, but always keep an eye on a true peak analyzer. Personally, I never use the limiter on the MD3 PowerCore. I use the Brickwall Limiter from that bundle, which is still one of the most transparent limiters I’ve ever worked with.

So Should You Get the MD4 HD Native?

Here’s my honest take after all this testing.

If you don’t already own the MD3 PowerCore and DynOne, the MD4 HD Native is a no-brainer. You get one of the best EQs I’ve ever heard in a multiband processor, parallel compression that beats DynOne, the unique DXP mode, and a normal compression mode that’s so close to the MD3 PowerCore that most people couldn’t tell them apart in a blind test.

If you already have the MD3 PowerCore and DynOne, the MD4 still adds value because of the EQ, the DXP mode, and the parallel compression. For me personally, the MD3 PowerCore still wins on transparent downward compression, but the gap is small.

At this point in my audio production journey, the MD4 HD Native is one of the best multiband processors I’ve ever used. If you’re shopping for a multiband compressor and a great EQ in one tool, this one is genuinely worth the investment.

Related Articles

• Mastering Services — If you’d rather have me master your track on the gear I tested here, here’s how that works.
• One Song Mastering Breakdown — Watch me master a real song from start to finish, including how I use multiband processing.
• Mixing & Mastering Cheat Sheet — A free download to improve your mixes and masters in under 10 minutes.

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About the Author

Adrian Milea is a Mixing & Mastering Engineer, Music Producer, and Educator with over 25 years of experience. With releases on Armada Music and features in DJ Mag, Adrian has spent decades testing gear, building mastering chains, and helping producers around the world get their music to a professional level. He runs adrianmilea.com where he shares tutorials, gear tests, and courses for serious music producers.

Until next time, Stay Cool and Make Great Music! -Adrian