If you're running an Enova DGX 6400 frame and audio is starting to feel like the weak link in your system, the DGX6400-ASB Audio Switching Board Kit is probably already on your radar. The question isn't whether it's a capable board — it is. The question is whether your specific installation will actually use what it brings to the table.

At $16,150 new (or $12,920 B-Stock), this isn't a casual add-on. Here's how we think through whether the upgrade is justified.

View the AMX DGX6400-ASB Audio Switching Board Kit For Enova DGX 6400 Product Page

What the DGX6400-ASB Actually Adds

The kit ships as two input boards and two output boards — sold and used as matched pairs. That's worth noting up front: you're not buying a single card you slot in where needed. Both sides go in together, and the audio path runs end-to-end through the pair.

The three capabilities that matter most for real installs:

• Audio breakaway — routes audio independently from video. A source's audio can follow a different path than its video signal, or be held at a destination while the video switches elsewhere.
• 10-band parametric EQ on every output — per-output tone shaping, not a global setting. Each output can be tuned to the specific speakers, room acoustics, or downstream processing it's feeding.
• Downmixing — reduces multi-channel audio (surround or multi-track) to a stereo or mono mix for destinations that can't handle the full channel count.
• Test tone generator — built-in signal generation for verifying audio connections during commissioning and troubleshooting without needing external gear.

Configuration runs through the Enova DGX Web Configuration interface, so if your team is already managing the frame through that dashboard, the learning curve is minimal.

When Audio Breakaway Is the Deciding Factor

The core use case for this board is any installation where audio and video don't always need to travel together. That's more common than it sounds.

Consider a large conference center where a presenter's laptop video goes to the main display, but their audio needs to hit a different zone — or stay locked to the confidence monitor feed while the main screen switches to a video playback source. Without breakaway, you're either routing both signals together and living with the limitations, or you're building a parallel audio infrastructure outside the matrix. Neither is clean.

Other scenarios where breakaway earns its keep:

• Multi-room facilities where background audio zones need to operate independently of presentation video
• Broadcast or production environments where program audio and intercom feeds share the same matrix
• Hospitality installs with multiple AV zones that need different audio content on the same video feed
• Houses of worship running separate audio to the mix position, overflow rooms, and recording outputs simultaneously

If your current DGX 6400 deployment doesn't involve any of these scenarios — if every source's audio just follows its video to a single destination — then breakaway isn't solving a problem you have.

The 10-Band Parametric EQ: More Useful Than It Looks on Paper

A per-output parametric EQ built into the matrix is genuinely useful in installations where you're feeding dissimilar speaker systems from the same frame. The room your boardroom display lives in sounds different from the lobby, the overflow room, and the outdoor patio — and if you're pushing audio to all four from the same Enova frame, you'd otherwise need external DSP at each destination or one global compromise setting.

Having 10 bands per output means you can tune each destination independently, once, through the web interface, and it stays there. For an integrator commissioning a complex system, that's a real time save during setup and a real reliability improvement over the lifetime of the install.

That said: if you're already running dedicated DSP processors at each zone — and many serious installs do — the onboard EQ is redundant. You're not paying for something you can't use, exactly, but you're not paying for something you will use either.

Downmixing: A Quiet but Practical Feature

Downmixing tends to be the feature integrators overlook until a client complains that their stereo zone isn't getting audio from a multi-channel source. The DGX6400-ASB handles that mix reduction inside the matrix rather than pushing it downstream. For installs pulling content from Blu-ray players, media servers, or video conferencing codecs that output multi-channel audio, this matters.

The Catch: This Board Is Purpose-Built for the DGX 6400

The DGX6400-ASB is not a standalone product and does not retrofit into other Enova frames. It exists specifically to expand audio capability within a DGX 6400 chassis. If your frame is a DGX800 or DGX1600, this kit doesn't apply — and if you're evaluating a new system build rather than an upgrade to an existing DGX 6400 deployment, the conversation is different (you'd be speccing the full system, not just the audio boards).

It's also worth being clear that the input and output boards must be deployed as a matched pair. You can't add only the input boards to gain breakaway on the input side without the corresponding output boards.

New vs. B-Stock on a Board Kit Like This

The B-Stock price on the DGX6400-ASB is $12,920 — that's $3,230 under new MAP. For a board kit going into a rack that no one is looking at, the cosmetic condition is essentially irrelevant. What matters is functionality, and B-Stock on pro AV hardware like this typically means a cosmetic mark on packaging or a prior return that checked out fine on inspection.

If you're buying for a client installation rather than a resale or demo unit, B-Stock is worth a serious look. The savings are real and the use case doesn't require mint-condition retail packaging.

Our Take

The DGX6400-ASB is the right upgrade if your Enova DGX 6400 install has any of these in play: audio and video routing that needs to operate independently, multiple destinations with different acoustic profiles, or multi-channel source content going to stereo zones. For installs where audio just follows video to a single output, the board adds capability you'll never use.

If you're unsure which camp your install falls into, the test tone generator alone won't justify the purchase — but if commissioning time and per-room EQ flexibility matter to your workflow, the onboard toolset starts to look a lot more practical against the price.

View the AMX DGX6400-ASB Audio Switching Board Kit For Enova DGX 6400 Product Page

Frequently Asked Questions

Does the DGX6400-ASB work with Enova frames other than the DGX 6400?

No. The DGX6400-ASB is designed specifically for the Enova DGX 6400 chassis. It is not compatible with other Enova DGX frames such as the DGX800 or DGX1600.

Do I need to install both the input and output boards, or can I add just one side?

Both must be installed together. The kit includes two input boards and two output boards, and they are designed to be used as a matched pair. Installing only one side is not a supported configuration.

If I already have external DSP processors at each zone, does the onboard 10-band EQ add anything?

Functionally, the per-output EQ and your external DSP would overlap. If every destination already has a dedicated DSP processor handling tone shaping, the onboard EQ on the DGX6400-ASB becomes redundant for that use case. The breakaway and downmixing capabilities would still apply regardless.

Is B-Stock a reasonable option for a board kit going into a client installation?

For a rack-mounted board kit where appearance isn't a factor, B-Stock is worth considering. The $3,230 savings versus new MAP is significant, and B-Stock on pro AV hardware typically reflects a cosmetic issue rather than a functional one. Review the listing notes for what's flagged on the specific unit before purchasing.