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Hifonics HFi100.2 (HFi 100.2)

400W RMS, 2-Channel HFi Series Amplifier

Discontinued
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Hifonics HFi100.2 (HFi 100.2)

400W RMS, 2-Channel HFi Series Amplifier

$82.95

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Clean Power and Continuously Affordable.

The Hifonics HFi100.2 informs you of its main objective in the name, Hi-Fi audio. High end sound processing is its main focus, however it continues to bring value to the table by providing high power output in an pleasantly small chassis. The illuminating retro Hifonics logo brings an old-school look back into their new series.

This two channel amplifier combines quality signal processing, with bulk power. At 4 Ohms, an impressive 100W RMS outputs to two channels, and at 2 Ohms, a full 200W RMS is output. This means clean, high power for two door speakers. You can also bridge the channels together, to provide 400W RMS at 4 Ohms to one channel.

This incredible power output is combined with the HFi series of amplifiers integrated high-dissipation heat-sink design, and built-in system diagnostics. Affordability does not have to sacrifice value or sound quality – making the HFi100.2 multi-channels the perfect choice.

  • HFi Series 2-Channel Class A/B Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 100 watts x 2 chan.
    • 2 ohms: 200 watts x 2 chan.
    • Bridged, 4 ohms: 400 watts x 1 chan.
  • Pulse Width Modulated (PWM) MOSFET power supply
  • LED power (blue) and protect (red) indicators
  • Variable Bass Boost (0 to +12 dB bass boost at 45 Hz)
  • Blue illuminated Hifonics badge
  • Soft start sound function
  • 2/1 channel operation
  • Preamp RCA outputs to daisy chain multiple amps
  • 4-Way System Protection circuitry (thermal, overload, DC, and speaker short protection)
  • Tri-mode speaker operation
  • Heavy duty aluminum alloy vented heatsink for maximum heat dissipation
  • Silver nickel-plated RCA level inputs
  • Silver nickel-plated screw terminals
  • Input sensitivity:
    • Variable level: 200mV-6V
  • Variable high-pass filter (60-12,000 Hz, 12 dB/octave)
  • Variable low-pass filter (30-250 Hz, 12 dB/octave)
  • Damping factor: >180
  • Frequency response: 30-12,000 Hz
  • Dimensions: 9-15/16"L x 8-13/16"W x 2-7/16"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

100 watts x 2 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

200 watts x 2 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

400 watts x 1 channels

Power Specifications - Subwoofer Channel

RMS Power @ 4 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
RMS Power @ 2 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
RMS Power @ 1 ohm
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 1 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.

Power Specifications - Full Range Channels

Peak Power @ 4 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 2 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 1 ohm
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Bridged Peak/Max Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the Peak/Max power created once an amplifier is bridged.

Power Specifications - Subwoofer Channel

Peak Power @ 4 ohm
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 2 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Peak Power @ 1 ohm
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
2
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

400 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.05%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
1 pair
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

60 - 12,000 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

30 - 250 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
90 dB
Channel Separation
Also referred to as crosstalk. The amount of interference on one stereo channel caused by the leaking of the other stereo channel. The higher the rating in decibels (dB), the better the Channel Separation.
80 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 12 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
15A x 2 
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

No
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
63%
4 Star
25%
3 Star
6%
2 Star
0%
1 Star
6%

Average Attribution Rating

Durability
4.4
Value
4.6
Features
4.1
Design
4.3
Usability
4.4
Kent

Tampa, FL

Overall
Durability
Value
Features
Design
Usability
Good Bang for the buck But...

September 27, 2011

Got this amp as part of a package deal. The amp itself is great bang for the buck but unfortunately it is not powerful enough for the sub that came with my package. Its like its almost enough but not quite. I would recommend 6 or 4 gauge wire. The 8 gauge wire that came with the package deal I got is just not thick enough. This amp does draw some current but if your electrical system is up to par this amp can really deliver. Keep in mind that bridged it is 400 watt RMS but it is also 400 Watt Peak so if you have a higher peak sub i would say get a different amp. IMO This would be great for a 10" or 12" without high power requirements.

9 of 10 found this helpful

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Drew

Cameron Park, CA

Overall
Durability
Value
Features
Design
Usability
Great Amp

February 25, 2012

I hooked this amp to an FLI audio 10 in a spec ported box and it hits hella HARD!!! Would recommend this amp to anyone.

8 of 10 found this helpful

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Carl

Fort Stewart, GA

Overall
Durability
Value
Features
Design
Usability
My amp

November 24, 2011

I bought this amp for my wife's car about six months ago and it hasn't let me down yet. It push all the power her 12" sub needs and sets the whole system off. I recommend this amp to anyone.

8 of 10 found this helpful

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rockstar143

Pembroke Pines, FL

Overall
Durability
Value
Features
Design
Usability
Great AMP!

October 4, 2011

Ignore my previous review, it was intended for the subs I recently purchased, not this amp I bought for a customer's car previously.

Amp was amazing, lots of power and perfectly matched up with the sub that came with the combo... hit VERY hard and never overheated. No complaints... been a long time Maxxsonics customer and will continue to be.

8 of 10 found this helpful

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Uncle Benny

Lady's Island, SC

Overall
Durability
Value
Features
Design
Usability
Very Satisfied

September 23, 2011

Ive never owned Hifonics before. I was restoring two projects at once, my 68 SS Camaro and a 72 C-10 Truck. After months of blogs, research and money going out faster than coming in, I looked away from the other Highly advertized brands and looked into the Hifonics brand who is made along with MB quarts, & Crunch for the power, warranty and price I couldn't be more excited with my decision. I've only had them installed a few months but man do they push and I haven't had any problems what so ever. Thanks Sonic Electronix for carring Hifonics products.

7 of 8 found this helpful

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orlando

Asheville N.C

Overall
Durability
Value
Features
Design
Usability
great buy for the money would buy again

October 19, 2010

This Amp hits hard and for the money you cant go wrong, I would buy again

7 of 9 found this helpful

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jebiz

hoquiam , wa

Overall
Durability
Value
Features
Design
Usability
this amp rocks

February 2, 2012

I bought this amp to push my girls type r 12 and man it does its job so far very impressed for the money its well worth it! (:

6 of 8 found this helpful

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Raymond

Canada

Overall
Durability
Value
Features
Design
Usability
Hifonics HFI100.2

October 29, 2011

So i ordered this amp a while back but my car broke and i got rid of it and have yet to install it. It's a very light amp and has very small power supply inside and cheap looking circuitry, looks like it will get hot quick which takes away from SQ but i bet it will work ok i doubt it pushes the power it claims.

6 of 8 found this helpful

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Castro

salinas, Ca

Overall
Durability
Value
Features
Design
Usability
Great amp. Great price.

April 2, 2011

I have this powerful little thing running two 11KS693 kicker speakers. It has them hitting hard and loud. Clear powerful quality sound for an unbeatable price.

6 of 8 found this helpful

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Travis

Newhall, CA

Overall
Durability
Value
Features
Design
Usability
Great amp, Beasting my MTX TR55 to its full potential

February 14, 2011

I love this amp I paired it up with a single MTX TR55 12in single voice coil at 4 ohms and it pounds, all I did was bridge my channels to get the power I need.

Pros
- It never over heats
- Has cool lights
- Sounds good

Cons
- None

6 of 8 found this helpful

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Andrew

Geagua, Ohio

Overall
Durability
Value
Features
Design
Usability
Hifonics HFi100.2 (HFi 100.2)

August 25, 2010

I got this amp about a week ago, and I absolutely love it. I have a 12" kenwood KFC-W3012 bridged: 400 watts rms @ 4 ohms and it sounds amazing. I can turn my stereo all the way up and you get nothing but crisp clear bass. Also, the logo when it is illuminated blue looks really cool at night. Overall, its a really good amp for the price!!
Pros: It has a lot of features, like the ability to switch from mono to stereo, from high and low filters or both, etc. Would highly recommend to anybody! Cons: hard to mount because of the design

5 of 6 found this helpful

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James

Greenfield, IN

Overall
Durability
Value
Features
Design
Usability
Awesome Product

February 20, 2010

I do not have this model. I have the one right before this one of the same amp, but this thing really is a good amp. I have it bridged at 4Ohms pushing one 15. I have the amp turned all the way up with the bass boost a quarter of the way up and this thing sounds really clear. I have had it hooked up for about 5 months now and am very impressed at this amp. It does get warm but has never shut off on me. Longest I have played it is about 2 hours straight with my radio as loud as it goes without sending a lot of distortion and the amp did not shut off....

6 of 8 found this helpful

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chris

Lake Elmo, MN

Overall
Durability
Value
Features
Design
Usability
Good performing amp

January 6, 2012

I'm running two pairs of 6.5" speakers, a set of MB Quart components up front and a set of Cerwin Vega coaxial speakers in back of my 98 Honda Odyssey. Clarity and power are outstanding when using the integrated high pass filter. No issues what so ever and I tend to play it loud. No instability and the amp never runs even warm. I wouldn't hesitate to buy this wonderfully priced and performing amplifier again.

5 of 7 found this helpful

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dave

colorado, co

Overall
Durability
Value
Features
Design
Usability
Messed UP!

August 30, 2011

I bought this and it turns out the amp won't put out anything to the right side of the audio! We tested it by switching the feed and only the left output works! The in and out lines are messed up too.

5 of 7 found this helpful

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dawg

WA Ohio

Overall
Durability
Value
Features
Design
Usability
awesome

February 15, 2011

I run an Infinity 12 at 2 ohms pushing around 200 watts with 2 6x9 EFX on this amp. and it hits hard. a lot of noise for a little power and reasonable price. Perfect for the balanced 9 speaker system.

4 of 5 found this helpful

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FiAudio18"BTL

Murfreesboro, TN

Overall
Durability
Value
Features
Design
Usability
Bang for buck

December 22, 2010

I bought this to power my Rockford fosgate t1652 and it powers them perfect. Never had any problems with it and does the power it says. Hifonics sells products that do what they say unlike other companies. Their product are affordable and are perfect for budget builds!

5 of 7 found this helpful

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Browse 1 question and 2 answers
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is this a good amp for two 6x9 and two 6 1/2 door speakers?
A shopper on Mar 2, 2015
Best Answer: Hello,

4 Speakers will be FAR better off with a 4 Channel amplifier. This is not to say that this 2 Channel Won't work, but without knowing what speakers you are referring to [A model number is Always a good idea to include] no one can confirm if the setup will work well.
Reply · Report · Customer SStaff on Mar 3, 2015
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

HFi100.2

UPC

806576216711

Weight

6.50lbs

Internal SKU

hfi1002

Internal Product ID

22698

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Hifonics HFi100.2 (HFi 100.2)