MEASURE

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Goal: accurate distances. A half-inch error on a tweeter is audible, so measure each one twice. Everything updates live; there is no Calculate button.

System layout ?

Units ?

Sub LP crossover (Hz) ?

LT (Tweeter)

LMR (Midrange)

LMB (Mid-bass)

RT (Tweeter)

RMR (Midrange)

RMB (Mid-bass)

RFL

RFR

SUB

ms per inch:0.07405

2

SET DELAYS

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Goal: enter these delays in your DSP, verify each channel plays where it should, and get a rough centered image before fine tuning.

Move stage: 0.0 in (minus = passenger, plus = driver)

Front of Vehicle

Image target

Driver

0.00 ms

Channel	Delay (ms)	Fine trim	Distance (in)

Pro Tips: Delays and Stage

Stage slider previews image shifts, plus or minus 9 inches in quarter-inch steps. Most cars land within the first few inches.
Seat Snap: Driver = as entered, Passenger = L/R mirrored, Center = L/R averaged.
If any adjustment would need a negative delay, every channel shifts up equally so all numbers stay DSP-legal.

3

CENTER THE IMAGE

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Goal: a mono voice locks dead center on the dash, and it stays centered whether tweeters, mids, or mid-bass are playing. Connect this phone or laptop to your head unit (Bluetooth or USB) so the test signals play through the car.

Pan: Center

Signal:

Volume:

Far Left and Far Right should sit at the A-pillars: not past them, not inside them. Voice band images tightest for centering.

Band Centering

Pick a band, mute everything else in your DSP, play the Center signal, and trim until the image locks at the target. Do tweeters first; they set the reference.

Rainbow Check

Each band's left/right arrival difference, compared to the tweeters. Bands that disagree with the tweeters bend the image across frequency.

Band	L/R delta (ms)	vs Tweeters	Status

Center trim: 0.00 ms (centered)

Nudge:

Center trim nudges the whole stage left or right after the bands agree. If the center is wide or fuzzy rather than off to one side, that's L/R response mismatch: fix with EQ, not delay.

4

BLEND THE SUB

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Goal: bass that sounds like it comes from the front, attached to the kick drum. Play the XO Band signal from Step 3 or a bass-heavy track while you step through the modes below; keep whichever is loudest and fullest through the crossover.

Cycle @ XO (ms)

Half cycle (ms)

Quarter cycle (ms)

Degrees per ms @ XO

Sub phase mode (added on top of the sub's distance delay):

Fine phase: 0° (0.00 ms)

Enter on SUB channel: 0.00 ms

Mid-bass reference (LMB/RMB avg): 0.00 ms

Sub blend details

Thin, hollow bass at the XO means the sub and mid-bass are fighting each other.
+180° sounds the same as flipping sub polarity. If +180° wins, you can flip the sub's polarity switch instead and go back to 0°; whichever is easier in your DSP.
Use Fine phase to sweep between modes in 5° steps.
Double-check by reversing: the wrong setting should make bass at the XO noticeably weaker. If flipping polarity barely changes anything, your XO slopes or levels need attention first.

5

RESULTS

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Goal: get these numbers into the DSP without transcription errors, and keep a copy for next time.

Show as:

Some DSPs (Helix, TwK, and others) take distance instead of time: use inches or cm for those. Your settings auto-save in this browser; the share link carries every setting so a customer can send you exactly what they have.