Velodyne EQ-Max Series, User Manual

Page: 15 / 28

WWW.VELODYNE.COM EQ-Max Series User’s Manual - 9
Rear Panel Connections — Detailed Explanation
Your new subwoofer is equipped with both speaker-level and line-level inputs. Use the RCA/Phono type “INPUT”
jacks when connecting your subwoofer to a pre-amp, signal processor, or line-level crossover. The “SPEAKER
LEVEL INPUT” jacks connect directly to the speaker outputs of an integrated amplifier or receiver. Your amplifier
section will notice no additional loading effects when you use these inputs because of their high impedance.
Note: Do not use both the RCA/Phono “INPUT” connections and “SPEAKER LEVEL INPUT” connections
simultaneously.
CROSSOVERS
Low-Pass Crossover
Both sets of inputs sum the left and right channels together and the resulting signal is passed through an
adjustable low-pass crossover before being amplified. The crossover control allows you to adjust the upper
limit of the subwoofer’s frequency response from 40 to 120 Hz. The subwoofer’s response will begin rolling off
above the frequency you set this control to.
You should set the crossover frequency to obtain a smooth and seamless transition from the subwoofer to the
main speakers in your system. If your main speakers are smaller units with limited low frequency output, you
may wish to choose a higher frequency (such as 100-120 Hz) than you would with larger speakers which have
greater low frequency output. With larger speakers, you might start with this control set lower, such as 70 Hz.
Subwoofer Direct
Subwoofer Direct is a setting on the low-pass crossover knob and will allow frequencies up to 135 Hz into the
subwoofer. See below for a more detailed explanation of this feature.
Receiver/Processor Subwoofer Outputs
your Velodyne subwoofer is designed to operate using the full range audio signal for input when using our
built-in crossover. Many home theater processors/receivers (Dolby Digital™, DTS™, THX™) have a “subwoofer
out” jack (sometimes labeled “lFe”) that is internally filtered, settable at the receiver/processor, and designed
to be used with a powered subwoofer. In some installations, it may be beneficial to use boTH the Velodyne
crossover and the receiver/processor crossover, resulting in a steeper ultimate crossover slope. In some rare
cases, combining both an external crossover and the one internal to the subwoofer may result in low output and
increased noise. In these installations you may need to bypass the crossover in either the processor or your eq-
Max subwoofer, or simply setting one crossover to a higher frequency (such as 120 Hz) will restore maximum
performance.
(Refer to Figure 4 Line-Level Subwoofer Connection Diagram and Figure 5 Speaker-Level Subwoofer Connection
Diagram, pages 10 and 11 for connection diagrams.)