An Amplifier Kit Buying Guide

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An Amplifier Kit Buying Guide

To get the best possible enhanced sound on a person’s audio devices, a good amplifier is needed. There are many audio devices available for the individual’s needs without needing the boost provided by an amplifier. However, an amplifier ensures that a single audio input device can function for multiple occasions. For instance, the personal MP3 player can be used to provide sound for an impromptu party if a person uses an amplifier to increase the limit of the volume levels that the music device normally contains.

An individual looking for an amplifier has numerous types from which to choose, but sometimes even that wide variety cannot provide exactly what a person is looking for, especially when looking for non-standard audio control specifications. This is where amplifier kits come in, as they contain unassembled parts and wires that are necessary for a person to build their own amplifiers with custom designs or patterns.

Amplifier kits can be acquired at many electronics shops, both online and offline. Some people buy kits where everything that is needed is pre-packaged, others put together their own kits with specific components. For both types of people, eBay and other mass retail shops online can provide entire kits or just components. Because assembling an audio amplifier at home requires precision, it is recommended that a buyer know the types of choices available for amplifier kits, how to buy them, and a few safety precautions to remember before getting started with assembly.

Things to Keep in Mind When Buying Amplifier Kits

There are many things that can affect the type of amplifier or amplifier kit a person purchases. There are greater chances of success if a buyer does a little research and has at least a basic knowledge of what he or she is buying.


How much a buyer spends on a kit depends on the type of amplifier that is to be built. The larger amplifiers are more expensive, as are those with more components. Many find online selections to be less costly than those found in offline shops, so checking online shops can be worthwhile.


The quality of the sound produced is greatly affected by whatever hardware a person uses. One of the reasons people prefer to buy amplifier kits, rather than the pre-assembled options, is that they want to boost the quality of the parts, therefore, receiving better audio quality. Make sure that the parts or components that are included in a kit are of excellent manufacture.


For those planning to go the do-it-yourself (DIY) route, the need for tools is something that has to be addressed seriously. There are many tools that an amplifier builder needs, but only the basics are needed to build a kit.

Tools Needed

Description and Purpose

Soldering iron

Used to melt solder in joining metals

25- or 30-watt irons should be sufficient; those with greater wattages are not subtle enough for small electronics

Temperature-controlled versions help avoid accidentally ruining delicate electronics


Best to have both Phillips and straight-edge types; different brands of kits may have different types of screws

Try screwdrivers that are four-in-one or three-in-one types for multi-purposeness

Needlenose pliers

Pliers that taper to a point on the usable end

Great for work in tight spaces

Also good for stripping wire and other wire work


Digital or analogue; measures voltage, resistance, and amperes

Good for checking faults in electronics

A good bench is also needed, which is a good investment for any electronics hobbyist or professional. The tools mentioned above are basic, although people who wish to go beyond building from kits need more equipment.

Options for Amplifier Kits

There are many types of amplifier kits, most containing standard parts, though some may require a buyer to look for individual parts elsewhere. The kind of kit that a buyer acquires depends on his need and preference. There are a number of features that the amplifier kit buyer should keep in mind, like audio quality, volume, portability, and whether he or she is planning to upgrade or expand the system in the future.


An amplifier can have one to multiple channels. How many a buyer needs depends on the number of speakers that the individual is planning to hook up to the speaker. One channel is needed per speaker, so if the buyer is building a stereo sound system, at least two channels are needed.


Amplifier power is measured in wattage. In many cases, the total power of the amplifier is the addition of the power in each channel. For instance, an amplifier with a total power of 50 watts and two channels has 25 watts per channel. Look for the power per channel when searching for amplifier power.

Audio Crossover

Crossovers are needed if two-way speakers are planned for the sound system that the buyer is building. Most amplifiers with crossovers built in have a lot of power, but crossovers are not useful when paired with regular speakers, unless the buyer is thinking of an upgrade in the future.


Top-quality sound needs good wiring, but there are so many wires needed to build an amplifier properly. Some installation kits boast complete wiring types for all of a buyer’s amplifier wiring needs, but for basic builds, knowing the necessary wires and acquiring them is enough.

Type of Wire or Cable


Power and ground wires

Provide electricity to the amplifier

The standard size for amplifiers is four-gauge

Make sure that power and ground wires are the same size and not too long

Speaker cable

Used to connect amplifier to subwoofers and speakers

Make sure of the number; two-channel amps have four speaker terminals, four-channels have eight, etc.

RCA cables

Used to carry audio signals between different devices

Needed to provide the input signal to the amplifier

One cable per channel; usually come in pairs

In connection with the power and ground wires, the remote turn on lead wire is also significant because it awakens the amplifier when the device is powered. Larger amplifiers also may have speaker level input cables, which are used instead of RCA cables on many four-channel amplifiers.

Custom Kits

Many kits have standard parts, as mentioned before, but there are also shops, which allow the buyer to dictate which parts and components to include in their amplifier kits. This may be the best option for people who want particular specifications and features for their amplifiers. Most custom kits are often more costly than others, however, and that is something to keep in mind as well.

How to Buy an Amplifier Kit on eBay

The variety of merchandise online is greater than that in offline shops, and that is one of the reasons why eBay, and sites like it, are popular. Navigating eBay is easy; simply navigate to the site, and then type what you are looking for into the search bar. More specific keywords provide you with more relevant results, although you receive fewer items than with non-specific keywords. For instance, you could type “amplifier kit” into the search bar, gaining you all that eBay can provide on the product. Afterwards, it is possible to use the site tools when narrowing down your results by price, location, condition, brand, and more. It is also possible to buy individual parts for your amplifier on eBay, in case the kit you are considering does not have the exact specifications that you need. There are many kinds of amplifier kits, some more complex than others. Just remember to evaluate both the seller and product before committing to a sale. A little bit of background research makes sure that you get the best product available at the most efficient prices.


Amplifier kits are an option for people who want to create their own amplifiers themselves, but who do not have the time to assemble the individual parts on their own, or do not want to worry about the compatibility of components. Companies usually put together amplifier components that are the most compatible with the rest, so it is one less hassle for the individuals who want to build the amplifier of their own. Many amplifier kits are less expensive than pre-assembled units as well, which is a point in its favour. DIY amplifier kits are also useful if a person wants an amplifier that is more calibrated towards a specific function than standard pre-assembled amplifiers; in other words, if they want to customise the amplifier themselves.

Amplifiers can be purchased as both kit builds and pre-assembled forms at electronics shops or online shops. There are many websites that specialise in the sale and assembly of various audio devices, which can be useful to enthusiasts. It is possible to just buy a kit or to have the company assemble one for you. Mass retail sites, like eBay, are also a good place to start, as they have tons of merchandise from a variety of different sellers. Doing some digging into amplifier options makes sure that the items that are purchased are the ones most appropriate for the needs of the buyer.

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