Jensen QX-85 Manual

QX-85
160 Watt Powered Subwoofer
Congratulations on investing in one of JENSEN's finest Subwoofer
Systems. You will find this information valuable for the long term
enjoyment of your QX-85.
Your JENSEN QX-85
is an integrated Active Subwoofer System with a single
10" Heavy Duty Sub driver powered by an on-board 160 Watt RMS amplifier. You may string
additional QX-85 subwoofers to your QX-85 if so desired by connecting to the "Line Output"
section of your QX-85's amplifier (see Line Output section below).
Room Placement.
Best positioning for your QX-85 is appx. 10-20cm from a wall
or better still, across a corner. This will enable the rear port to "breath" efficiently and provide
maximum "acoustic coupling" into your room i.e. more Bass. With different room positioning,
Bass response can vary as Subwoofer frequencies are mainly non-directional.
Subwoofer amplifier features.
Light on front panel is Blue when active and
Red when on standby (standby mode, like on a TV draws next to no power) Switch the QX-85
amplifier switch to "AUTO" and this can be left on indefinitely as the QX-85 automatically
activates when it senses as incoming signal. Front panel LED will then turn Blue. After signal
has been removed between 15 and 40 minutes, amplifier will revert to Standby mode and LED
will change to Red.
Level Control Knob
is your volume knob. This adjusts the output of your QX-85 to
balance and harmonize with output from your Front / Center etc. etc. speakers. DO NOT set
this on maximum. Be careful not too advance this control too far as overload may occur causing
damage to your QX-85 speaker (see below setting recommendations).
Frequency Control Knob.
This control adjusts how low (in frequency) you wish your
QX-85 to operate at. In other words, 70 Hz is a lower and deeper frequency than 90Hz, so if
you set at 70Hz you will be amplifying all music information 70Hz and below this frequency
and filtering out everything above which is the ideal intention of a Powered Subwoofer. Take
care not to advance this control too far as overloading may occur (see below recommendations).
Phase Control Switch
is only used if several speaker boxes are in the one room (i.e.
Center Speaker, Surrounds etc.). This Phase switch can be set to ensure the QX-85 woofer is
"in phase" with all other woofers operating together in the same room so that Bass cancellation
does not occur. Once your entire speaker system is completely set-up, flick this switch from
"NOR" to "REV" and leave on setting that provides the most Bass. This will be the best setting
and be correctly "in phase". Leave switch on "NOR" if no audible increase is detected.