RCA Stereo Amplifier re Q5 User Guide

re-Q recommends that you have your device installed  
by an authorized re-Q dealer, preferably MECP certified.  
Installation  
1. Disconnect the negative battery terminal from your vehicle’s battery.  
V O L U M E S E N S I N G B A S S R E S T O R AT I O N D E V I C E  
2. Tap into the factory speaker and subwoofer (if applicable) wires. Connect signal in onto the re-Q5 harness. (Fig. 1)  
NOTE: Phase is extremely important when summing! If reversed you will cause a cancellation in your system.  
a. After connecting the factory speaker leads to the input of the re-Q5 , disconnect all speakers that will be  
re-Q5, the 5-channel volume sensing bass restoration device, is designed to restore bass when  
adding aftermarket amplifiers to a factory audio system. Most OEM systems “roll off” the bass to avoid  
damaging the speakers at higher volume levels. While this is acceptable when using stock speakers, it’s  
not desired when adding amplifiers as it limits the low frequency output of your system. Some try to  
fix this problem by maxing out the gains of an amplifier for added bass response at higher volumes,  
but when the volume is turned down,  
powered by the aftermarket amplifier(s).  
White/Red - Left Front (-)  
Left Front Mid  
White - Left Front (+)  
White/Black - Left Front (-)  
Fig. 1  
Left Front Tweeter  
White - Left Front (+)  
3
5
7
9
there is too much bass for the midrange  
and highs.  
Brown/Black - Left Front (-)  
2
4
6
8
Sub  
Brown - Left Front (+)  
re-Q5 solves these problems by sensing  
the input from the head unit to add more  
bass at high volume levels, and balances  
the bass response at lower volume levels.  
You get the bass you want with added  
performance while keeping your factory  
radio and your steering wheel controls.  
NOTE: When using the summing feature of the re-Q5, be sure to connect the midrange and tweeter to the same  
colored pairs of wires. For example, use one grey and grey with black stripe for the front right tweeter and the  
other grey and grey with black stripe for the front right midrange.  
GAIN  
NOTE: When not using midrange and tweeter summing, use the white speaker wire pair with the red stripe for  
front left channel input.  
10  
11  
1
NOTE: For best performance disconnect the factory sub when adding aftermarket amps and subs.  
b. If an entire channel of the speaker inputs is not being used, twist the positive and negative wires of that input  
together and insulate the connection. This is not necessary for the unused summing inputs, only if the entire LF,  
RF, RR, LF, or Sub input channels are not used at all.  
3. The re-Q5 features three turn on settings for maximum installation flexibility. Deciding on which remote setting to use  
depends on w hich type of signal is created by your head unit, and whether your factory audio system creates any  
audible noise or pops when turning on or off. The three settings are as follows:  
16 14  
15  
12  
13  
re-Q5 Features  
a. Remote Mode - Attach red wire to a switched 12V source that is on when the car’s head unit is on. Set the Input  
Select switch to the Remote position, and the re-Q5 will turn on/off only when voltage is applied/removed from  
this wire.  
1. Input Module Connector  
2. Power Output Indicator  
3. Left Front Gain  
7. Left Rear Gain  
8. Right Rear Gain  
9. Sub Gain  
10. Low RCA Level Outputs  
11. Bass Enhance Switch  
12. LP Crossover  
13. Sub Sonic Crossover  
14. AC Turn on Sensitivity  
15. AC Signal Present Indicator  
16. Input Select Switch  
b. High Level Mode using Smart Engage™ - Requires that DC voltage be present on the speaker input wires to allow  
the re-Q5 to turn on and off. Not all vehicles have DC voltage on the speaker wires. To test for DC voltage, attach  
the (+) end of a volt meter to one speaker lead and the (–) to chassis ground of the vehicle. If there is 6V or more  
of DC voltage at the speaker lead when the head unit is on, the re-Q5 will be able to sense the signal from the  
head unit and turn on. Set the Input Select Switch to High Level and the re-Q5 will turn on/off with the head unit.  
4. Front Sub Level Control  
5. Right Front Gain  
6. Rear Sub Level Control  
c. AC Mode using Smart Engage™ - This setting is intended for vehicles  
that do not have DC voltage on the speaker leads. This setting requires  
adjusting the sensitivity of the re-Q5 to turn on when music signal is  
present on the speaker input wires. Set the Input Select Switch to AC and  
the re-Q5 should turn on with signal from the head unit. The re-Q5 is shipped  
with the sensitivity set to the maximum level. To ensure the sensitivity is not set  
too high for the application, confirm the re-Q5 turns off with the head unit. Note there is  
approximately a 15 second delay for the re-Q5 to turn off after the head unit is turned off.  
The delay is to prevent the unit from shutting off when there are pauses in the music or when  
changing tracks or CDs. If the re-Q5 does not turn off after 15 seconds, adjust the Turn On Sensitivity  
knob counter-clockwise in small increments until the re-Q5 turns off after the 15 second delay. (Fig.2)  
Input Module Wiring  
Blue - Remote Out  
Green/Black - Left Rear (–)  
Green - Left Rear (+)  
Green/Black - Left Rear (–)  
Green - Left Rear (+)  
White/Red - Left Front (–) w/ Smart Engage  
White - Left Front (+) w/ Smart Engage  
White/Black - Left Front (–)  
White - Left Front (+)  
Brown - Sub (+)  
Brown/Black - Sub (–)  
Purple/Black - Right Rear (–)  
Purple - Right Rear (+)  
Purple/Black - Right Rear (–)  
Purple - Right Rear (+)  
Fig. 2  
NOTE: When using High Level (DC) or AC signal sensing, the white input wire pair with the red stripe must be  
used to accurately sense the voltage from the head unit.  
NOTE: All three turn on settings will trigger the blue 12V remote output wire on the re-Q5 harness.  
4. Using the provided fuse, connect the Yellow (12VDC Constant) power wire from the the re-Q5 to the power source  
by tapping off your amplifier’s power wire or by running a separate wire directly to a fused constant 12V source.  
5. Connect the black (Chassis Ground) wire from the re-Q5 to the chassis of the vehicle. Remove the paint at the  
ground location to connect directly to the bare metal of the chassis. When the re-Q5 is grounded at the same  
location as the amplifier, it functions as a ground loop isolator (Fig. 3).  
Grey/Black - Right Front (–)  
Grey - Right Front (+)  
fuse  
Yellow - 12VDC (Constant)  
NEG  
POS  
Grey/Black - Right Front (–)  
Grey - Right Front (+)  
Red - Remote In 12V Switched  
BATTERY  
Red - Remote In  
Black - Chassis Ground  
Yellow - 12VDC (Constant)  
Fig. 3  
Black - Chassis Ground  
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