NOTE: When precise array design, subwoofer integration, DSP and delay systems, and
compensation for acoustical conditions all come into play, measurement and correction tools are a must. Meyer’s SIM 3 measurement system, Galileo, LD-3, CP-10 parametric equalizer and the VX-1 program equalizer are highly recommended.
USING M’ELODIE WITH SUBWOOFERS
A M’elodie system will provide full bandwidth frequency range down to 70 Hz. The height of the array (number of cabinets) will determine the total SPL available and how much low frequency energy can be provided, proportional to the upper-frequency spectrum.
If higher SPL is necessary, or the program content requires additional low-frequency energy (e.g., the reinforcement of popular music), then subwoofers should be used to augment your M’elodie loudspeaker array(s).
Meyer Sound subwoofers such as 700-HP, 600-HP, and
650-P can achieve frequency response down to the 30 to 36 Hz range, extending the system response appreciably and increasing the acoustic power of the system in the lowest frequencies. The ideal ratio of M’elodie loudspeakers to subwoofers depends on three factors:
1.Array configuration (number of elements and angles)
2.Placement of the subwoofers — whether they are flown or ground-stacked
3.Frequency content of the signal being reproduced by the system
For most applications, two M’elodie loudspeakers for each ground-stacked subwoofer yields good results in frequency response and headroom. Using higher ratios (for example, three M’elodie cabinets for one subwoofer) should be done carefully since this can have negative consequences, decreasing the headroom in the low frequencies and exposing the drivers in the subwoofers to excessive levels.
NOTE: The limit LEDs indicate when the safe power level is exceeded. If the subwoofers
used in the system begin to limit before reaching the required SPL at low frequencies, consider adding more subwoofers to satisfy the SPL requirements without exposing the drivers to excessive heat and/ or excursion — and eventual damage.
Using the filters in Galileo and LD-3 helps to easily integrate and optimize your M’elodie arrays with subwoofers. The use of high-pass filters may augment array headroom by removing lower frequencies near the unit’s lower operating range, while low-pass filters can remove unwanted mid- low frequencies reproduced by the subwoofers. The use of
these filters reduces the area of overlap and minimizes the interaction and possible cancellations between subsystems.
NOTE: Full-range signals may be applied to Meyer Sound’s self-powered loudspeakers
and subwoofers because they have built-in active crossovers. However, the use of external filters
—like the ones in the Galileo and LD-3 — is optional, and should be handled very carefully to minimize phase shifts that can cause cancellations and deteriorate the impulse response of the system.
Using M’elodie with the 700-HP Subwoofer
A M’elodie array can be deployed in combination with Meyer Sound 700-HP subwoofers in applications where high SPL is necessary, or the program content requires additional low-frequency energy. For these applications, the features of the 700-HP are desirable — ultrahigh power and response down to 30 Hz.
The 700-HP can be ground-stacked under a flown M’elodie array or next to a M’elodie ground-stacked array. In addition, the 700-HP subwoofers can be flown in a straight array next to the M’elodie array using the optional MRK-700 rigging kit and the MTG-700 top grid.
NOTE: When loudspeakers and subwoofers are physically separated by more than 4
feet — or delay must be used between them — a measurement system such as SIM should be used to determine the correct delay and polarity.
Using M’elodie with the 600-HP Subwoofer
A M’elodie array can be deployed in combination with Meyer Sound 600-HP subwoofers in applications where the 600-HP’s compact size and versatile M’elodie-compatible flying capabilities are more desirable than the extended low frequency output and other features of the 700-HP. The
600-HP extends the range of the system down to 36 Hz.
600-HP subwoofers with the optional MRF-600 can be flown on the same array as M’elodie by using the MG- M’elodie multipurpose top grid to fly the 600-HP and the MTF-MICA/M’elodie to transition to the M’elodie array. The 600-HP can also be flown in an array next to M’elodie. In addition, 600-HP subwoofers can be ground-stacked under a flown M’elodie array, next to a M’elodie array, or in the same ground-stacked array via the transition frame.
NOTE: When loudspeakers and subwoofers are physically separated by more than 4
feet — or delay must be used between them — a measurement system such as SIM should be used to determine the correct delay and polarity.
