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Infinity Reference 1300a

342W Max, Reference Series Class D Monoblock Amplifier

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Infinity Reference 1300a

342W Max, Reference Series Class D Monoblock Amplifier

$129.95

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  • Reference Series Class D Monoblock Amplifier
  • RMS Power Rating:
    • 4 ohms: 200 watts x 1 chan.
    • 2 ohms: 300 watts x 1 chan.
  • Max power output: 342 watts x 1 chan.
  • MOSFET power supply
  • LED power and protection indicators
  • Tuned Bass EQ (0-6 dB bass boost at 50 Hz)
  • IMS inputs allows connection to other Infinity expansion products
  • Gold-plated preamp RCA outputs
  • DC, overheat, over or under voltage, and short circuit amplifier protection
  • Gold-plated RCA level inputs
  • Variable low-pass filter (32-320 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Also found as: REF1300A
  • Frequency response: 11-330 Hz
  • Efficiency: 85 dB
  • Dimensions: 14-3/4"L x 9"W x 2-11/16H
  • 4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • Authorized Internet Dealer
  • 1 year Manufacturer's warranty

Product History:

Infinity 1300a thumbnail
(newest, current model)
Infinity 311A thumbnail
(previous model, replaced by Infinity Reference 1300a)
Infinity 310A thumbnail
(previous model, replaced by Infinity Reference 311a)

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.
200 watts x 1 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 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.
300 watts x 1 channels
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.
Not Stable

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.
Reference (Infinity)
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.

D
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.
1 - Mono
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

342 watts
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.

300 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.
Not Bridgeable
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.
<1%
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)
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.

32 - 320 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.
85 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 - 6 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.
20A x 3 
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.

Yes
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.

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
69%
4 Star
31%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.6
Value
4.8
Features
4.2
Design
4.3
Usability
4.7
Andrew

Milford, ME

Overall
Durability
Value
Features
Design
Usability
good amp for price

February 25, 2010

good overall amp for the price no overheat problems hits hard sounds good

12 of 14 found this helpful

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tyler

Norman, OK

Overall
Durability
Value
Features
Design
Usability
I would recommend....

July 28, 2008

I got this amp not really knowing exactly how it would perform but as soon as i got it home and hooked it up i was amazed. Even though its not an incredibly powerful amp it works great for cars. You can actually tell a difference when adjusting the frequency and bass boost. I would recommend this to anyone who doesn't want so much bass from a sub to wear you cant breath but to people who like a nice and crisp sound from an amp but still will be able to crank it up if they want too.

10 of 12 found this helpful

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Cory

cleveland

Overall
Durability
Value
Features
Design
Usability
great amp

June 12, 2011

I bought this amp a couple years ago and its on of the best built amps. Great quality and built like a tank. I abused the hell outta it and ran 2 12's till it got too hot to touch. Even when I blew one of the capacitors inside it still never quit and its powering my rockford sub in my car with no problem

10 of 13 found this helpful

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Jeremiah

Guam

Overall
Durability
Value
Features
Design
Usability
Good Amp

April 28, 2010

Great amp, especially for rock n roll. Good all around. I would buy another if I needed it.

8 of 9 found this helpful

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Quicko

Allentown, PA

Overall
Durability
Value
Features
Design
Usability
Great Sub for the Price

October 15, 2009

This is a quality amp, and at this price it's hard to beat. I push my subs pretty hard, and after 8 months, I've had no issues.

8 of 9 found this helpful

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Pandaman

Hot Springs, AR

Overall
Durability
Value
Features
Design
Usability
thump, thump

June 4, 2013

I got this amp to replace a smaller in size but higher in power. I've taken a lengthy road trip with this amp and had no problems. There were no over-heating issues and I also love the few adjustment dials instead of the many others have. This amp is the one I was looking for to start with. You will not be disappointed.

8 of 10 found this helpful

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Jeremy

Las Vegas, NV

Overall
Durability
Value
Features
Design
Usability
Great Value

January 18, 2010

I got this amp in a combo special and it performed awesome until it had a fault. But Infinity is such an awesome company they replaced it for free. Great price for a good amp from a very respectable company.

8 of 10 found this helpful

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p-dog

new iberia, La.

Overall
Durability
Value
Features
Design
Usability
You cant beat this deal great amp i love it.

June 6, 2009

plenty of power very clean power looks good too.

8 of 10 found this helpful

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Michael

San Clemente, CA

Overall
Durability
Value
Features
Design
Usability
pretty good

May 14, 2009

Running dual ohm with a 12" pioneer champion series. Only overheated once on a pretty intense bass line. Solid..cant go wrong with it other than that,.

8 of 10 found this helpful

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Justin

San Diego, CA

Overall
Durability
Value
Features
Design
Usability
Reliable Power and Good Looks!

March 7, 2013

I bought this amp in October of 2012 to power my first sound system, a 12 inch Kicker Comp (4 ohm) in a ported box. Although this basic sub is only rated at 150 watts rms I figured I could safely push 200 watts to it since Kicker is known to underate their products. And for almost 6 months, it has worked flawlessly, the amplifier barely even gets warm. The blue LED light strips glow really bright when its powered up and they make the trunk look cool at night. The only thing that I find strange that no one else has pointed out is this: I'm pretty sure this amp puts out way more than the 200-300 watts rms thats listed. The fuse rating on it for example, is 60 amps! This was something that my friend who works at car audio shop pointed out to me. Most 200 watt amps have 25 or 30 amp fuses...a 60 amp rating is usually only necessary and used on bigger 500 or 600 watt amps. It certainly seems true, because I only have the gain turned up not even half way and it maxes out my 12 in. Comp and thats at 4 ohms. I'm thinking of upgrading to a Kicker CVR in a bit, and at least I won't have to upgrade my amp, because I know this thing will push it no problem. Bottom line: This is a tough, powerful, reliable, and really cool looking amp for a pretty damn good price. Just be aware that it is a bit more powerful than the ratings suggest, so if you're using a weak sub, make sure you turn the gain down so you don't blow it. :)

5 of 7 found this helpful

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DaPabler

Grand Rapids, MI

Overall
Durability
Value
Features
Design
Usability
This Amp is B/A

May 14, 2009

This amp is exactly what I was hpoing for! I have had it for 6 months, and I have not had one problem....except now I dont want to leave my car. I have the matching reference series sub from Infinity for this amp, and it is untouchable for a mono amp. I have the 12" sub inside a sealed box and it just pumps! I listen to metal and the response time on a triple drum is amazing. I recommend if you are going for sound, and not just bump.

6 of 9 found this helpful

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Gene

Monee, IL

Overall
Durability
Value
Features
Design
Usability
great amp at a great price

March 8, 2010

Bought this for the wife's RX-8. Lots of power and has been running strong for over a year. Sonic Electronix FTW!

4 of 6 found this helpful

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Taylor

Tacoma, WA

Overall
Durability
Value
Features
Design
Usability
Cheap and powerful

October 3, 2013

This with a Kappa 12 out does my 2 type 12's with a hifonics colossus. Very impressed.

3 of 5 found this helpful

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Browse 1 question and 1 answer
Hide answersShow all answers | Sort by
I purchased a Class D amplifier that pushes out the following:
?4 ohms: 200 watts x 1 chan.
?2 ohms: 300 watts x 1 chan.
I recently purchased 2) 600 Watts (RMS) @ 4 Ohm subwoofers. Each is hooked up directly to the their own speaker terminals on amp. Does this mean they're setup in parallel? And based on my amp specs, how much power will they receive? Is it 200 watts divided by 2 @4 Ohms or does it become 300 watts divided by 2 @2 Ohms for each channel? I know the amp is pretty under powered for these speakers so any (modestly priced) replacement recommendations would be appreciated.
EricR on Jun 1, 2015
Best Answer: Hello Eric,

I assume you are referring to the Infinity 1300a. If so, there is no need to specify the specs, as they are right in front me of. Moreover, the outputs are NOT channels, but that's just irrelevant semantics.

To your point, the subwoofers - assuming your details are correct - are wired in parallel to a 2ohm load, each driver is getting a rated 150w RMS Each. This means you are dramatically underpowering your drivers - again, assuming your details are correct. (it is best to provide model numbers, not descriptions, so that there is a uniform stream of information.)

As far as recommendations go, we suggest giving our sales team a call. Our definition of "modestly priced" may be far off of yours, and to better assist you it is better to speak with a rep .
Reply · Report · Rick MStaff on Jun 1, 2015
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Product Summary

Manufacturer

Model Number

1300a

UPC

050667035006

Weight

12.00lbs

Internal SKU

1300a

Internal Product ID

9710

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: Infinity Reference 1300a

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