Velodyne EQ-Max Series - Manual (Page 8)

Inputs
your new subwoofer is equipped with speaker-level and line-level inputs. Use the lINe leVel jacks when connecting your subwoofer to a
pre-amp, signal processor (such as lFe out or sub out), line-level crossover, or receiver with pre-amp level outputs. When using the line level
jacks, some receivers may not provide enough signal to have the unit’s auto-on feature operate properly. Additionally, this lack of signal may
also cause the subwoofer to produce less output than it is capable of.
To alleviate this condition, we recommend the following steps:
1) If using line level jacks, boTH THe leFT AND RIGHT INPUT SHoUlD AlWAyS be USeD – never use just the left or just the right
input. If using line level connections from a preamp or signal processor, use both left and Right inputs from your preprocessor or
preamp and connect them to the left and Right inputs on your subwoofer. (See figure 4 on page 11.)
2) If using a receiver with lFe out, be sure the lFe channel is sending adequate signal to the subwoofer. The subwoofer’s default volume
setting is 30 on a 1-80 scale (roughly 1/3 volume). Adjust the lFe channel on your receiver or processor to achieve the desired bass
output. See your receiver or processor’s owner’s manual for more information. (See figure 5 on page 12.)
Volume Control
This control allows you to balance the output from the subwoofer to the main speakers in your system. This control should be set to achieve
similar output levels from both the main speakers and subwoofer when listening to music. The default volume setting is 30 on a 1-80 scale.
Warning:
Some manufacturers preset their receivers with the Sub-out channel signal at a minimum level. It is very important to verify that your receiver
Sub-out channel is set to the same output level as your front right and left channels. Refer to your receiver manual for the individual channel
level adjustment procedure. If your receiver Sub-out channel is set too low, the subwoofer may appear to have a weak output, it may sound
noisy or distorted, and the Auto on/off feature may not operate properly.
Low-pass Crossover - 40 to 135 Hz
All inputs sum the left and right channels together, with the resulting signal passing 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 135 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 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. The default crossover setting is 80 Hz. With larger speakers, you may want to set this even lower, for example 70 Hz.
Phase Adjustment - 0°/90°/180°/270°
This control allows you to change the phase of the subwoofer’s output signal to correct for any possible mismatch and resulting cancellation
between the subwoofer and your main speakers/amplifier. To adjust, simply listen to the system with music playing, then depress the various
phase switches on the remote control and listen for a change in mid-bass frequency output. The correct position will have a greater amount
of overall bass energy at all frequencies. If the settings sound similar, we recommend the “0” position. See the remote control section for
more information.
Auto Turn on Function
The subwoofer will turn itself on automatically when an audio signal is present. If no signal is present for approximately eight minutes, the unit
will switch to standby mode (blank leD). While in standby mode, your subwoofer will draw very minimal power. your sub is shipped in the
“Always on” position. In order to activate the circuit, change the switch to “Stand-by”.
Warning:
If the Sub-out channel signal level from your receiver is too weak, this feature will not operate properly and shut the subwoofer off while you
are listening to it. To correct this, see the VolUMe CoNTRol section above.
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EQ-Max User’s Manual
INSTALLATION