Kappa 102.7W - Subwoofer INFINITY - Free user manual and instructions

Product Type	Subwoofer
Brand	Infinity
Model	Kappa 102.7W
Driver Size	10 inches (25.4 cm)
Impedance	2.7 ohms
Power Handling (RMS)	350 watts
Power Handling (Peak)	1400 watts
Frequency Response	23 Hz – 200 Hz
Sensitivity	92 dB (2.83V/1m)
Mounting Depth	5.2 inches (132 mm)
Mounting Hole Diameter	9.1 inches (231 mm)
Recommended Enclosure Volume (Sealed)	0.6 – 0.9 cu ft (17 – 25 L)
Recommended Enclosure Volume (Ported)	1.2 – 1.5 cu ft (34 – 42 L)
Voice Coil	Dual 2.7 ohms
Cone Material	Glass-fiber reinforced paper cone
Surround Material	High-roll polyurethane
Grille Included	Yes (mesh)
Dimensions (Diameter x Depth)	10.5 x 5.9 inches (267 x 150 mm)
Weight	6.8 lbs (3.1 kg)
Recommended Amplifier Power	200 – 600 watts RMS
Usage	Car audio subwoofer for deep bass
Maintenance	Clean with dry cloth; avoid moisture and direct sunlight
Safety	Consult qualified installer; ensure proper enclosure and wiring
Spare Parts / Repairability	Contact Infinity support or authorized service centers

Frequently Asked Questions - Kappa 102.7W INFINITY

What is the impedance of the Infinity Kappa 102.7W subwoofer?

The subwoofer has a dual voice coil configuration with 2.7 ohms per coil. It can be wired for 1.35 ohms (parallel) or 5.4 ohms (series).

What is the recommended enclosure size for this subwoofer?

For a sealed enclosure, 0.6–0.9 cu ft (17–25 L). For a ported enclosure, 1.2–1.5 cu ft (34–42 L) with a 4-inch port.

How much power can the Kappa 102.7W handle?

RMS power handling is 350 watts, peak power handling is 1400 watts. A recommended amplifier power range is 200–600 watts RMS.

What is the mounting depth and cutout diameter?

Mounting depth is 5.2 inches (132 mm). The required mounting hole diameter is 9.1 inches (231 mm).

Can I use this subwoofer in a home theater system?

While designed for car audio, it can be used in home theater with a suitable enclosure and amplifier. However, it is optimized for vehicle acoustics.

How do I clean and maintain the subwoofer?

Gently clean the cone and surround with a soft, dry cloth. Avoid liquid cleaners, moisture, and prolonged exposure to direct sunlight to prevent damage.

What is the frequency response of this subwoofer?

The frequency response is 23 Hz to 200 Hz, providing deep, accurate bass.

Is a grille included with the subwoofer?

Yes, a black mesh grille is included to protect the cone.

What type of enclosure is best for this subwoofer?

Both sealed and ported enclosures work well. Sealed gives tight, accurate bass; ported offers higher output for louder bass.

Where can I find spare parts or repair service?

Contact Infinity customer support or an authorized service center. Do not attempt repairs yourself to avoid warranty void.

USER MANUAL Kappa 102.7W INFINITY

KAPPA SUB OM 1/24/06 11:32 AM Page 1

102.7w, 104.7w,
122.7w, 124.7w

Infinity®

kappa series

INSTALLATIONWARNINGSANDTIPS

THANK YOU for choosing an Infinity Kappa Series subwoofer. Kappa Series subwoofers are designed to suit a broad range of mobile audio applications and can be used in a wide variety of enclosure types to produce extended, powerful bass in a limited amount of vehicle space. To ensure maximum subwoofer performance, we strongly recommend that installation be left to a qualified professional. Although these instructions explain how to install a Kappa Series subwoofer in a general sense, they do not show box-construction details and exact installation methods for your particular vehicle. If you do not feel you have the necessary experience, do not attempt the installation yourself, but instead ask your authorized Infinity car audio dealer about professional installation options.

Remember to keep your sales receipt with this manual in a safe place so both are available for future reference.

LOUD MUSIC AND HEARING

Playing loud music in an automobile can hinder your ability to hear traffic, as well as permanently damage your hearing. The maximum volume levels achievable with Infinity speakers, combined with high power amplification, may exceed safe levels for extended listening. We recommend using low volume levels when driving. Infinity accepts no liability for hearing loss, bodily injury, or property damage as a result of use or misuse of this product.

CHOOSINGANENCLOSURE

Kappa Series subwoofers are designed to perform best in moderately sized sealed enclosures, vented enclosures and prefabricated bandpass enclosures. Infinite-baffle mounting is possible, but mechanical power handling will be reduced because there will be no volume of air to stiffen the woofer's suspension and prevent overexcursion. If you choose infinite-baffle mounting, consider the RMS and Peak power handling ratings to be half of what is printed in the specifications chart in this manual.

You should choose an enclosure type based on the amount of cargo space you can devote to an enclosure, the amount of power you will use to drive your subwoofer(s), and your listening habits.

SEALED ENCLOSURES

The air trapped inside a sealed enclosure is compressed when the woofer moves rearward and is rarefied when the woofer moves forward. In both cases, the air inside and outside the box will seek equilibrium by pushing and pulling on the woofer; the result is a stiffer suspension when compared to the woofer alone. This means that the woofer's cone is harder to move at low frequencies, a condition which both protects the woofer from overexcursion and uses more power than other designs for the same acoustic output. A sealed enclosure and your Kappa Series subwoofer will provide the flattest overall response and the widest bandwidth in the car at the expense of overall efficiency. Kappa woofers in sealed enclosures provide usable response below 20Hz inside a vehicle. The sealed enclosure design indicated on the Enclosure Design Sheet which accompanies this manual represents the best compromise between low-frequency extension and flat response.

An optimum sealed enclosure for Kappa Series subwoofers is always smaller than an optimum enclosure of another type. We recommend sealed enclosures for enthusiasts who prefer accurate music reproduction and flat frequency response, for those who have only a small space to devote to a subwoofer enclosure or for those who have plenty of amplifier power devoted to driving the subwoofer.

Sealed-enclosure construction is straightforward and forgiving of errors in volume calculation, but air leaks should be avoided. Use medium-density fiberboard (MDF), glue and screws to construct the enclosure, and seal all joints with silicone caulk.

VENTED ENCLOSURES

A vented enclosure acts like a sealed enclosure at frequencies above the tuned [resonance] frequency. At resonance, which is defined by the vent, the woofer is nearly stationary while the air inside the vent vibrates; the vent produces the majority of sound. This condition provides greater mechanical power handling at and above resonance, but reduced mechanical power handling below resonance. Since the woofer doesn't move much at resonance, airflow across the voice coil is minimized and thermal power handling is reduced slightly at resonance. Vented enclosures provide better efficiency in the 40Hz – 60Hz range, at the expense of sound output in the lowest octave (below 40Hz). We recommend the use of a subsonic filter with vented enclosures.

An optimum vented enclosure for a Kappa Series subwoofer is larger than an optimum sealed enclosure. We recommend Infinity Kappa Series woofers in vented enclosures for enthusiasts who prefer accentuated bass response, for those who have plenty of cargo space to devote to a subwoofer enclosure and for those who will use a less powerful amplifier to drive their subwoofers.

Vented-enclosure construction is more difficult than the construction of a sealed enclosure. The enclosure volume and port dimensions have a specific relationship with the characteristics of the subweaver, so the volume and port dimensions indicated on the included Enclosure Design Sheet must be followed precisely to ensure optimum performance. As with sealed enclosures, use medium-density fiberboard (MDF), glue and screws to construct the enclosure, and seal all joints with silicone caulk.

BANDPASS ENCLOSURES

Bandpass enclosures can provide the most output from any amplifier and woofer combination over a limited band of frequencies, but that additional output comes at the expense of sonic accuracy. If the highest sound-pressure level (ISPL) is your ONLY design goal, choose a bandpass enclosure.

The bandpass enclosure found on the included Enclosure Design Sheet is a combination of a sealed enclosure and a vented enclosure. The sealed enclosure stiffens the suspension of the woofer, just as it does in a simple sealed enclosure, and the vented enclosure into which the woofer outputs sound provides an acoustic low-pass filter which attenuates high frequencies in the woofer's output. That attenuation of high frequencies can make it very difficult to hear amplifier and speaker distortion; consequently, you may not be able to determine when the subwoofer is in danger of being damaged.

An optimum bandpass enclosure is often larger than an optimum vented enclosure. We recommend bandpass enclosures only for enthusiasts who want high SPL without regard for sonic accuracy. If high SPL is your goal AND you care about great-sounding bass, choose a vented enclosure instead.

CHOOSING AN ENCLOSURE (CONT.)

Bandpass-enclosure construction is more difficult than vented box construction and, as with vented enclosures, the design parameters for the vented section must be followed carefully. Small errors in calculating the volume of and building the sealed section won't drastically alter the result. Fortunately, there are many prefabricated bandpass enclosures that are designed to extract the most output possible from nearly any woofer. We recommend these if you must have a bandpass enclosure. If you choose to build your own bandpass enclosure, use MDF, glue and screws to construct the enclosure, and be sure to seal all joints with silicone caulk.

YOUR CAR AND BASS REPRODUCTION

Depending on the size of your vehicle's interior listening space, reproduced bass frequencies below about 70Hz are boosted by nearly 12dB per octave as frequency decreases. This is because the interior of the car is a lossy sealed enclosure and the pressure increase is proportionate to the woofer's excursion, which increases with decreasing input frequency.

That phenomenon, known as the vehicle's transfer function or cabin gain, plays an important role in shaping the frequency response of the woofer in the car, and is displayed graphically alongside the out-of-car response on the included Enclosure Design Sheet for your Kappa subwoofer.

You may notice that the amount of bass increases when you open any of the windows or the trunk of the car, and decreases when you close any of those openings. This is not a function of your enclosure; rather, the opening of the window or trunk turns the lossy sealed enclosure in which you listen (the car's interior) into a vented enclosure. The air in the open window or trunk vibrates, just as the air trapped inside an enclosure's vent vibrates. That vibration increases the system's output at the resonance frequency, defined by the volume of air in the listening area and the dimensions of the vent (open window or trunk). For many cars, that frequency is roughly 40Hz.

CONNECTIONS

Kappa Series subwoofers include an impedance selection switch, which will allow you to choose between 1 and 4 ohms for 102.7w and 122.7w, and between 2 and 8 ohms for 104.7w and 124.7w. If you are using multiple woofers connected in either series or parallel in a single system, be sure that the impedance selection switch is in the same position for all woofers in the system. That will ensure that each woofer is driven with the same amount of power.

Figure 1. Impedance selector switch 102.7w 104.7w

POWER CONSIDERATIONS

To design a subwoofer system that maximizes available amplifier power, keep the following rules in mind:

The formula for total system impedance for woofers connected in parallel is:

|=1/(1/w1+1/w2+1/w_3)

And the formula for total system impedance for woofers connected in series is:

|=w_1+w_2+w_3

(w= impedance of any individual woofer)

For several woofers connected in series-parallel, use both formulae to determine the final system impedance.

The following table can serve as a reference for often-used combinations:

woofer number final

impedance of connection impedance

[ohms)	woofers scheme		[ohms)
1	2	parallel	0.5
1	3	parallel	0.33
1	4	series-parallel	1
1	2	series	2
1	3	series	3
1	4	series	4
2	2	parallel	1
2	3	parallel	0.66
2	4	series-parallel	2
2	2	series	4
2	3	series	6
2	4	series	8
4	2	parallel	2
4	3	parallel	1.33
4	4	parallel	1
4	4	series-parallel	4
4	2	series	8
8	2	parallel	4
8	3	parallel	2.66
8	4	parallel	2

The following illustrations show parallel and series connections of Kappa woofers.

Figure 2. Parallel connection

Figure 3. Series connection

Figure 4. Four woofers connected in series-parallel

kappa series

SPECIFICATIONS

102.7w

Type: 10" Subwoofer,

dual-voice coil

Nominal Impedance: 1 ohm or 4 ohms

Power Handling: 350W RMS, 1400W Peak

Sensitivity (2.83V, 1m): 89dB

Frequency Response: 20Hz - 250Hz

Mounting Depth: 4-3/4" [121mm]

Cutout Diameter: 9-1/8" (232mm)

104.7w

Type: 10" Subwoofer,

dual-voice coil

Nominal Impedance: 2 or 8 ohms

Power Handling: 350W RMS, 1400W Peak

Sensitivity (2.83V, 1m): 87dB

Frequency Response: 20Hz - 250Hz

Mounting Depth: 4-3/4" (121mm)

Cutout Diameter: 9-1/8" (232mm)

122.7w

Type: 12" Subwoofer.

dual-voice coil

Nominal Impedance: 1 ohm or 4 ohms

Power Handling: 350W RMS, 1400W Peak

Sensitivity (2.83V, 1m): 92dB

Frequency Response: 18Hz – 250Hz

Mounting Depth: 5" (127mm)

Cutout Diameter: 11-1/8" (283mm)

124.7w

Type: 12" Subwoofer,

dual-voice coil

Nominal Impedance: 2 or 8 ohms

Power Handling: 350W RMS, 1400W Peak

Sensitivity (2.83V, 1m): 90dB

Frequency Response: 18Hz - 250Hz

Mounting Depth: 5" (127mm)

Cutout Diameter: 11-1/8" (283mm)

A valid serial number is required for warranty coverage.

This product is designed for mobile applications and is not intended for connection to the mains.

Features, specifications and appearance are subject to change without notice.

Infinity, Harman International and Kappa are trademarks of Harman International Industries, Incorporated,

registered in the United States and/or other countries.

Infinity Systems, 250 Crossways Park Drive, Woodbury, NY 11797 USA

516.674.4463 • FAX [phone] • www.infinitysystems.com

© 2006 Harman International Industries, Incorporated. All rights reserved. • Part No. KAPSUBOM1/06

H A Harman International* Company

Declaration of Conformity

We, Harman Consumer Group International

2, route de Tours

declare in own responsibility that the products

described in this owner's manual are in compliance

with technical standards:

EN 61000-6-3:2001

EN 61000-6-1:2001

Klaus Lebherz

Harman Consumer Group International