Day 4: Time Alignment Implementation

Distance measurements (tape measure from each driver to driver's right ear):

• Right tweeter: 28 inches
• Left tweeter: 45 inches
• Right midbass: 34 inches
• Left midbass: 52 inches
• Subwoofer: 78 inches

Delay calculation (using subwoofer as reference — furthest driver, 0 ms delay):

Delay formula: Distance difference (inches) / 13,500 inches per second = delay in seconds

• Right tweeter: (78 - 28) / 13,500 = 3.70 ms
• Left tweeter: (78 - 45) / 13,500 = 2.44 ms
• Right midbass: (78 - 34) / 13,500 = 3.26 ms
• Left midbass: (78 - 52) / 13,500 = 1.93 ms
• Subwoofer: 0 ms

Applied in DSP: - Output 1 (R tweeter): +3.70 ms delay - Output 2 (L tweeter): +2.44 ms delay - Output 3 (R midbass): +3.26 ms delay - Output 4 (L midbass): +1.93 ms delay - Output 5 (Sub): 0 ms

Verification measurement:

Impulse response now shows all drivers arriving within 0.3 ms — excellent.

Frequency response: 90 Hz dip reduced from -6 dB to -2 dB (less cancellation due to improved phase alignment).