UPQ-1P OPERATING INSTRUCTIONS
21
In addition, when using third-party digital signal processors
to filter source signals, it is highly recommended that the fil-
ter be configured to emulate the low-cut filter used by Meyer
Sound’s LD-1A and LD-2.
*If the digital signal processor does not have variable Q for
high-pass filters, the filter should be set to “Butterworth”
(Q ≅ .7).
If loudspeakers will be driven directly from a digital signal
processor, make sure the signal is sufficient to drive the total
load impedance of the connected loudspeakers (see “Loop
Connector” on page 15).
TIP: To address the collective concerns of sys-
tem design verification, subwoofer integration,
digital signal processors, delay systems, and acousti-
cal conditions, a measurement system like Meyer
Sound’s SIM 3 is strongly recommended.
LD-1A and LD-2 Low-Cut Filter Parameters
Type Order Pole Frequency Q
High Pass
2
nd
(–12dB/oct)
162 Hz 0.82*
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