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W8L, W8LC and W8LM inter-driver delays
Standard Martin Audio presets apply small output channel delays to DX1 or DP226
controllers to align the multiple drivers within W8L, W8LC and W8LM cabinets.
These inter-driver delays are not user adjustable. They have a strong influence on a
system's off-axis lobe structure in addition to the usual on axis performance alignment.
Very important note!
Crossover frequency and phase settings should never be adjusted to
compensate for room anomalies.
Controller input equalizers or external equalizers (or, in an ideal world,
room treatment!) should be used for that purpose.
Controller Reference Delays
The multiple driver delays in standard Martin Audio presets are "Lock Linked" to a
particular crossover reference delay channel. In the absence of any main (W8L,
W8LC) delay requirement, the W8L and W8LC reference delays default to zero
because they relate to the LF horn drivers whose acoustical centre is furthest from the
cabinet grille – i.e. the driver that every other driver in the cabinet gets delayed to.
W8LM presets include the WLX sub woofer so they have two (mono) or four (stereo)
unlocked delays. The WLX channel defaults to zero because the WLX has the longest
horn. The W8LM LF/Full-range and HF reference delays default to 3.931mS and
3.829mS respectively to time align the W8LM to the WLX when the grilles are
aligned.
W8L, W8LC & W8LM reference delays and subwoofer delays are left unlocked to
allow users to align main systems and sub woofers if placement causes misalignment.
The "Lock Linking", mentioned above, ensures that all the drivers in a cabinet track
the reference delay and maintains the correct inter-driver alignment.
Standard reference delay channels are shown on the next page...
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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