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
10
10.5
11
11.5
12
12.5
13
13.5
14
Port
Tuning
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
Length Frequency
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
22
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
46
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
These drivers may
not work well with
these enclosures
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: (405) 624-6722. You must receive an RA#
before returning any defective parts.
SHIPPING ADDRESS:
Ai Research
2805 E. 6th
Stillwater, OK
74074-6513
1
2
3
4
5
6
This ruler is calibrated in tenths for your convenience.
8
9
7
QLH/T-1.2512sx/dx PORT TUNING CHART
No trimming
required for
these drivers
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.
13. Return to step 3-C on front page now.
For other cool
Q-Logic products,
Visit our website!
http://qlogic.ws
32901
