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9. Polarity Switch
Changes the polarity of the subwoofer, also referred to as the “phase.” Listen and adjust for maximum bass.
10. Variable Low Pass (Sub frequencies)
When sending a full range signal to the subwoofer, the variable LPF blocks HF signals above indicated frequencies from reaching the
subwoofer.
Note This control only affects the sub in Master mode, if your sub is in Slave mode it will receive this setting from the Master sub).
Tip If your sub sounds “muddy” or “muffled” try turning this control counter clockwise to the 9 o’clock position or lower.
CVA-121
Parametric EQ for Sub Setup (Figure 3)
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The parametric EQ was designed to cut offending frequencies from wall boundary conditions and
or bump frequencies that need more emphasis. For example, when your subs are near a glass
wall or other boundaries that may rattle or shake, or for bands that have a drummer that they may
want to fine-tune the sub to “punch” a specific frequency.
Tip If you are unfamiliar w/ Parametric EQs, do some research about it or leave in the
Bypass position.
1. Gain = Volume / Level:
Turning clockwise increases the overall sound produced.
2. Frequency = the specific frequency being adjusted – the Q parameter works in tandem with
the Q parameter.
Turning clockwise allows for more upper bass and mid range frequencies to be produced.
3. Q = the width of the frequency range being affected.
Turning clockwise narrows the frequency range that is being affected. Turning counter
clockwise widens the frequency range being affected.
4. Bypass / On switch
In the Bypass position, the EQ is not active and the previous controls are null.
Figure 3
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1. Power (AC) Input (w/ Fuse)
Connect here the IEC power cord. Do not use other type of power cord.
2. Power (AC) Output
Intended to run power for one or two additional CVA-28 units. Never
daisy chain more than three CVA-28’s from a single source!
Note This only applies to power cables – not the audio cables.
3. Voltage Switch
Allows system to be used with supply voltages of either 110-120 volts
or 220- 240 volts.
Warning Make sure you have selected the correct voltage based
upon your countries standard voltage before you power up your
speaker.
4. Power On / Off
Switches the system On and Off. Make sure the Level is turned down
and that you have selected the correct signal type in (Mic/DI or Line)
before powering On.
Warning Unexpected High pressure sound levels can occur by
sending a line level signal to the CVA-28 while the unit is set for a
DI input, such as for an acoustic guitar.
CVA-28 (Figure 4)
Figure 4