EQ and Filter Controls

How high-pass, low-pass, and EQ controls affect SPL, excursion, port velocity, and max output.

Direct answer

EQ and filter controls modify the simulated drive signal before results are calculated, so they can change response and physical limits at the same time.

What it measures

• High-pass, low-pass, and parametric EQ impact on supported graphs.
• Changes to SPL, excursion, port velocity, and Max SPL where the graph supports EQ-aware output.
• Filter choices that shape the operating bandwidth.

Why it matters

• A high-pass filter can protect excursion below tuning.
• Boost can improve apparent response while consuming headroom quickly.
• Filter assumptions must match the real DSP or crossover plan.

How to read it in 00 Simulator

• After adding boost, inspect excursion and headroom rather than only SPL.
• After adding a high-pass filter, confirm the protected region and the remaining usable bandwidth.
• Use the same filter assumptions when comparing candidate alignments.

What good, warning, and bad usually look like

Good

Filters achieve the target response while improving or preserving physical margin.

Warning

EQ creates the desired shape but sharply reduces headroom.

Bad

The design depends on filters that the real system will not implement.

Common false conclusions

• EQ boost is not free output.
• A high-pass filter does not fix thermal limits above the cutoff.
• Filter changes should not be evaluated on SPL alone.

App behavior notes

• SPL, transfer function magnitude, excursion, port velocity, and Max SPL are marked as EQ-supporting graph surfaces in the app configuration.
• The EQ editor itself renders through the SPL graph surface.