Rockford Fosgate RFP4208, RFP4212, RFP4210, RFP4110, RFP4112 Installation & Operation Manual

700RFP4112

This is a Package that consists of

575RFP4112

&

044H1212SX

QLH-1.2512sx/dx

TM

QLT-1.2512sx

Thanks for choosing Q-Logic! - the ONLY subwoofer enclosure with the Q-Ring (patent­pending), a multi-diameter woofer mounting adapter that can extract optimum performance
from any driver you choose! Follow the 4-step instructions CAREFULLY to custom fit your driver
to the enclosure. YOUR INSTALLATION CAN MAKE A HUGE DIFFERENCE IN THE
SOUND QUALITY!

Step 1: Prepare the driver and Q-Ring.

11.36

11.12

11.00

10.75

A. Using one of the supplied rolls, apply the foam tape to the back of
the driver. Use care to apply the foam tape so that all of the mounting
holes are COMPLETELY covered.

B. Place ring face down with tabs sticking up. Apply foam tape to the
back of the mounting ring against the inside edge of the
mounting ring.

Step 2: Adjust the Q-Ring to fit your driver.

A. Place the driver face down on a flat surface. Place the mounting ring
over the driver with the locating tabs pointing up. If the mounting
ring does not rest on the foam tape on the driver you will need to trim
the centering tabs.

B. Using a pair of diagonal cutters or scissors, trim each of the 6
centering tabs. Recheck the fit.

Step 3: Mount the driver.

A. Place the mounting ring in the enclosure and align the arrow on the mounting ring
with the alignment mark on the silver ring.

Use this position for mounting drivers with
conventional hole alignment. (see illustration)

8 HOLE

OFFSET ALIGNMENT

Use this position for mounting drivers with offset
hole alignment. (see illustration)

6 HOLE

OFFSET DRIVERS

CONVENTIONAL
HOLE ALIGNMENT

C. If you know the mounting diameter of your driver, use the trim guide
to determine if you need to trim the mounting ring.

C. When the mounting ring fits against the foam tape on the driver,
the driver is ready to be mounted into the enclosure.

B. IMPORTANT!!! Refer to the driver documentation to determine
whether to use a sealed or ported enclosure. If the manufacturer
recommends a sealed enclosure continue to step C. If the
manufacturer recommends a ported enclosure, refer to the tuning
chart on the back for porting procedures.

C. Connect the speaker leads from the woofers to the terminal cups.
Be sure to wire the positive to red and the negative to black.

D. Align the mounting holes on the driver with the recesses in the
Q-Ring. If necessary, rotate the Q-Ring and the driver to properly
align printing on the dustcap.

E. Using the supplied screws, securely mount the driver in the
enclosure. It is recommended to start all screws and then come
back and retighten screws to prevent the driver basket from being
bent or distorted during mounting.

Step 4: Mount your speakers!

A. Experiment to find the best location for your new subwoofer system. Subwoofers for hatchbacks can
fire either upward, forward or backward for the best sound. Positioning makes a big difference in
sound quality.

Use this position for mounting drivers with offset
hole alignment. (see illustration)

B. FLYING SPEAKERS ARE DANGEROUS!! Permanent mounting is not only the safest installation, but
usually produces the best sound quality too. However, if you decide to mount your speakers so that
they can be easily removed, there are many suitable types of brackets available at most hardware
stores. The key to selecting such hardware is to make sure that the mounting will hold the speaker
securely. Good luck and enjoy your new subwoofer!

QLH/T-1.2512sx/dx PORT TUNING CHART

VAS

CU.FT. 1 1.5 2 2.5 3 3.5 4 4.5 5 5 .5 6 6.5 7 7.5 8 8.5 9 9.5 1 0 10.5 11 11.5 12 12.5 13 13.5 1 4

LITERS 28.3 42.5 56.6 70.8 85.0 99.1 113.3 127.4 141.6 155.8 156.3 156.8 157.3 157.8 158.3 158.8 159.3 159.8 160.3 160.8 161.3 161.8 162.3 162.8 163.3 163.8 164 .3

19 11.8 11.4 11.1 10.7 12.1 37
20 11.9 11.5 11.1 10.7 10.3 10.0 9.7 9.4 11.3 38
21 11.9 11.4 10.9 10.5 10.1 9.8 9.4 9.1 8.8 8.5 8.3 10.6 39

FS 2 2 11.6 11.1 10.6 10.1 9.7 9.3 9.0 8.7 8.3 8.1 7.8 7.5 7.3 10.0 40

23 11.6 11.0 10.4 9.9 9.5 9.0 8.7 8.3 8.0 7.7 7.4 7.1 6.9 6.7 6.4 9.3 41
24 11.8 11.1 10.4 9.8 9.3 8.9 8.5 8.1 7.7 7.4 7.1 6.8 6.6 6.3 6.1 5.9 5.7 8.8 42

25 11.4 10.6 10.0 9.4 8.9 8.4 8.0 7.6 7.2 6.9 6.6 6.3 6.1 5.8 5.6 5.4 5.2 5.0 8.2 43
26 11.2 10.3 9.6 9.0 8.5 8.0 7.5 7.2 6.8 6.5 6.2 5.9 5.6 5.4 5.2 5.0 4.8 4.6 4.4 7.7 44
27 11.1 10.2 9.4 8.7 8.2 7.6 7.2 6.8 6.4 6.1 5.8 5.5 5.3 5.0 4.8 4.6 4.4 4.2 4.1 3.9 7.3 45
28 11.1 10.1 9.2 8.5 7.9 7.4 6.9 6.5 6.1 5.8 5.5 5.2 4.9 4.7 4.5 4.3 4.1 3.9 3.7 3.6 3.4 6.8 4 6
29 11.3 10.2 9.2 8.4 7.8 7.2 6.7 6.3 5.9 5.5 5.2 4.9 4.7 4.4 4.2 4.0 3.8 3.6 3.5 3.3 3.2 3.0 6.4 47
30 11.7 10.4 9.3 8.4 7.7 7.1 6.5 6.1 5.7 5.3 5.0 4.7 4.4 4.2 3.9 3.7 3.5 3.4 3.2 3.0 2.9 2.8 2.6 6.1 48
31 10.8 9.5 8.5 7.7 7.0 6.5 6.0 5.5 5.1 4.8 4.5 4.2 4.0 3.7 3.5 3.3 3.1 3.0 2.8 2.7 2.5 5.7 49
32 11.6 10.0 8.8 7.8 7.1 6.4 5.9 5.4 5.0 4.6 4.3 4.0 3.8 3.5 3.3 3.1 2.9 2.8 2.6 2.5 5.4 50
33 10.7 9.2 8.1 7.2 6.5 5.9 5.4 4.9 4.5 4.2 3.9 3.6 3.4 3.2 3.0 2.8 2.6 5.1 51
34 11.9 9.9 8.5 7.5 6.6 5.9 5.4 4.9 4.5 4.1 3.8 3.5 3.3 3.0 2.8 2.6 2.5 4.8 52
35 11.1 9.2 7.9 6.9 6.1 5.5 4.9 4.5 4.1 3.7 3.4 3.2 2.9 2.7 2.5 4.5 53
36 10.3 8.6 7.3 6.4 5.6 5.0 4.5 4.1 3.7 3.4 3.1 2.8 2.6 4.2 54
37 9.6 8.0 6.8 5.9 5.2 4.6 4.1 3.7 3.3 3.0 2.8 2.5 4.0 55
38 11.3 9.0 7.4 6.3 5.4 4.8 4.2 3.8 3.4 3.0 2.7 2.5 3.7 56
39 10.6 8.4 6.9 5.8 5.0 4.4 3.9 3.4 3.1 2.7 2.5 3.5 57
40 10.0 7.8 6.4 5.4 4.6 4.0 3.5 3.1 2.8 2.5 3.3 58
41 9.3 7.3 6.0 5.0 4.3 3.7 3.2 2.8 2.5 3.1 59

42 8.8 6.8 5.6 4.6 3.9 3.4 2.9 2.6 2.9 60
43 11.5 8.2 6.4 5.2 4.3 3.6 3.1 2.7 2.7 61
44 10.9 7.7 6.0 4.8 4.0 3.3 2.8 2.5 62
45 10.3 7.3 5.6 4.5 3.7 3.1 2.6
46 9.7 6.8 5.2 4.2 3.4 2.8
47 9.2 6.4 4.9 3.9 3.1 2.6
48 8.7 6.1 4.6 3.6 2.9
49 8.2 5.7 4.3 3.3 2.7
50 7.8 5.4 4.0 3.1 2.5

No trimming

required for

these drivers

These drivers may

not work well with

these enclosures

Port Tuning

Length Frequency

This ruler is calibrated in tenths for your convenience.

1

2

3

Step 3-B:

1. Round the VAS value for your woofer up to the higher of the closest values on the chart.

2. Look up the intersection of Fs and VAS for the woofer you wish to use. This number is the port
length in inches.

3. Many driver configurations will NOT REQUIRE PORTS. Please refer to your specific driver's
recommendations.

4. Using the port length from above, refer to the Port Tuning Frequency Chart to determine the
roll-off point of your system. IF THIS FREQUENCY IS GREATER THAN Fs, THE DRIVER MAY
PERFORM BETTER IN A SEALED ENCLOSURE! If satisfactory, proceed to step 5. If not, you
may want to consider a different driver, or leaving the enclosure sealed ( unported).

Consult your dealer if you are unsure about your particular application.

5. Cut all of the ports for your enclosure to the length on the chart.

6. These Q-Logic enclosures have a port plug installed from inside the enclosure.

7. When porting these enclosures you will need to remove this plastic port plug. (Do not cut the
carpet until step 10)

8. From inside the enclosure, unscrew the four screws holding the port plug in.

9. From the outside of the enclosure firmly press the plug in until it releases.

10. After the port plug and plug gasket are removed, "X" cut the carpet over the hole.
( NOTE: Do not cut the carpet out! )

11. The "X" cut in the carpet will allow the carpet to extend into the port hole and work like a
gasket for the port.

12. Push the "X" cut carpet down into the port hole. Slide your cut and tuned port into
the port hole.

ONE YEAR LIMITED WARRANTY

Ai Research warrants to the original retail purchaser, this
product to be free from defective workmanship and material
when used under normal conditions in accordance with the
product's printed instructions for a period of one (1) year from
date of purchase. Ai Research agrees to remedy any such
defect or to furnish a new part in exchange for the defective one
at no charge for parts or labor.

This warranty is limited to Ai Research products and specifically
excludes consequential damage to other associated equipment
which may result for any reason from use with this product. In
no event shall Ai Research be liable for incidental or
consequential damages or have any liability with respect to
defects other than the obligations set forth above. Some states
do not allow limitations on how long an implied warranty lasts,
and/or the exclusion or limitation of incidental or consequential
damages, so the above limitations or exclusions may not apply
to you. This warranty gives you specific rights and you may
also have other rights which vary from state to state.

This warranty does not cover the following:

• Damages caused by water, neglect, abuse, misuse,

• Improper installation or operation.

• Damages caused by acts of God or nature.

• Damages occurring during shipment of the product to
Ai Research for repairs.

• Any product which is modified without consent of Ai
Research.

If you need warranty service, take the following steps:

1.Save your sales receipt for warranty registration and service.

2.Contact the dealer from whom you bought Q-Logic. They will
give you instructions for warranty service.

3.If no dealer is available, call Ai Research for further

Instructions: [phone]. You must receive an RA#
before returning any defective parts.

4

5

6

7

8

13. Return to step 3-C on front page now.

For other cool

Q-Logic products,

Visit our website!

http://qlogic.ws

SHIPPING ADDRESS:
Ai Research
2805 E. 6th
Stillwater, OK
74074-6513

9

32901