How to Buy an Amplifier Kit on eBay

Like if this guide is helpful
How to Buy an Amplifier Kit on eBay

Amplifiers are devices used to increase a signal power by utilizing an external source of energy. They are handy tools for music lovers and musicians of all kinds. There are diverse types of amplifiers and amplifier kits that are classified based on their frequency range, application, and the devices that are used. In essence, amplifiers are used to increase a signal's power without changing the signal at all. Some recent amplifiers, however, have a set amount of noise and distortion, which is added invariably to the signal.

In selecting an amplifier kit, there are often two things that buyers worry about. The first thing is power; this is where some buyers get confused because they assume that too much amplifier power damages their speakers, but it is a lack of power that poses the bigger problem. The fact is that a sound level that is too high saturates and generates interference signals, which may destroy the tweeter and speakers.

The second thing that some buyers worry about is getting the right cables. Buyers should ensure that they choose an appropriate cross-section cable that corresponds to the distance among the speakers, amplifier, and the speaker's power supply. Buyers should learn about the different types of amplifiers, the components of an amplifier kit, and how to select the right one to suit their needs. They should also become familiar with various terminologies and sub-categories of amplifiers before seeking out a new amp or amp kit on eBay.

Types of Amplifiers

There are basically two types of amplifiers, which include preamplifiers and integrated amplifiers. Integrated amplifiers simply refer to the ones that combine the power amp and preamp into one device. However, many people prefer to separate the vibrating radiations of a power amp from the delicate, low level signals of the preamp. Therefore, many amplifiers were sold in more than one case, and sometimes each channel would have its own monoblock, which is a power amp.

Amplifiers can be further broken down into two technological categories: valve or tube amplifiers and transistor amplifiers. Tube or valve amplifier kits are often chosen when the buyer is more inclined to play acoustic music rather than just playing their music loudly. Transistor amplifiers are best for playing loud music.

Buyers should always try to get the most power when purchasing amplifiers because there can never be too much. In fact, buyers can use a 10 watt tube amplifier to run a high-sensitivity speaker, but it would take a 200 W amp to get the best results from the speakers. Therefore, buyers stand a better chance of realising the full potential of their speakers if they have a high-powered amplifier.

Hi-Fi Amplifiers

Hi-fi amplifiers are the most popular, but their main purpose is simply to turn the tiny signal from an iPod, CD player, radio tuner, and all other music sources into a larger, powerful signal that is able to manage a loud speaker. The aim of the amplifier is to accomplish its task without really distorting the signal, but it also allows the users to have control over the amount of boost power that is added to the original signal.

The boost control is done using the volume button or knob, but integrated amplifiers sometimes include additional controls for the treble, balance, and the base. This enables users to effectively adjust the final output sound to suit their preferences.

Recommended Amplifier Power

While there can never be too much power, buyers who are on a budget may not be able to afford amps with extremely high power levels, but they would still want an efficient amp. For buyers who need an amplifier to elevate their at-home listening pleasure, they can choose an amplifier with a power of 20 -50 watts, which should be enough and not too costly. The speakers also play a part in creating the sound experience and should be anything over 85 decibels per watt.

Amplifier Selection Chart

Some buyers still get confused when selecting a new amplifier kit, even after having previously owned one. To fully understand which amp to choose, buyers should first comprehend their variation in timing, imaging and transparency, and dynamics.




Ability to precisely illustrate the decay and attack of each played note


Ability to depict variation levels between notes; dynamically strong amps have more energy


How 3D or solid a voice or instrument sounds when played; two speakers are standard to reconstruct the soundstage of the initial sound recording; amps with strong imaging proficiency can create an extended sonic space


Refers to the transparency of detail, which is the physical difference between amps; forward sounding amplifiers can sometimes highlight details but diminishes the general music consistency

In learning the underlying differences between amplifiers, buyers are better able to select an amplifier kit that can provide them with the best sounding audio. This can be applied to the selection of various kits including integrated and stereo amplifier kits.

Bi-wiring vs. Bi-amping

Buyers should also know the difference between the above terminologies before buying a new amp or a new kit. Bi-wiring refers to the running of separate cables to the bass terminals and the treble on a speaker. This often improves the quality of the sound as long as the installer uses similar cables for each one. Bi-amping refers to utilizing two stereo amplifiers to run one set of speakers, where one amp runs the treble and the other amp operates the bass section.

Amplifier Kits

Valve or tube amplifier kits are generally sold with a set group of components. These items result in a fully functional audio amplifier when all the components are adjoined, and some kits require the buyer to solder the components themselves.

Some amplifier kits may not include the heat sink, but they all contain the basic components, which are resistors, capacitors, and a circuit board. The aim is always to get a low noise circuit board that does not pop when the system goes on and off and precision +/-1 metal film resistors. Buyers should check these specifications before making a kit selection.

Stereo amplifiers are generally put together beforehand, and sellers often quote the maximum supply capability in their listings. Buyers should also opt for amplifiers that are completely thermally and short circuit protected. Some stereo amplifiers are equipped with the headphone output, the volume control, and an on and off switch. It is always best to select an option with most of the items already included.

How to Buy an Amplifier Kit on eBay

It may seem a little difficult to buy an amplifier kit online if you have no idea what you are looking for. However, you can use the information above to help you select a good amplifier kit to meet your needs with confidence. You can easily find one on eBay as the site makes purchasing easy. You can perform a general search for amplifier kits on the eBay home page and then browse through the results and continue refining the search until you are able to find something suitable.

However, if you are already certain of the exact type of amplifier that you need, you can select the specific filter type, such as integrated amplifiers, Pre-Amps, headphones, and power amplifiers. Additionally, the result list can be further narrowed down to include specific brands, audio inputs, audio outputs, and the number of channels. These filters should make the kit selection process a lot less daunting.

Once the results are narrowed down, you can now work out your budget and consider the possibility of buying a used amplifier kit if you have a small budget. Start this process by inputting a price range and look at the remaining options. When you find the one that fulfil your needs, contact the seller to get more information on what the kit includes and the shipment process.


Amplifiers are so diverse that even an experienced user may have a problem finding the right kit. A lot of buyers choose to purchase their amplifier kits on eBay because of the wide variety, the ability to perform searches, and various filtering options. This is ideal because buyers have so many things to consider before selecting any one amplifier kit. They have to first consider the various amplifier types and technologies before further scrutinizing several deciding factors and features.

Buyers have to also understand the power struggle and then compare that with their budget to avoid damaging their beloved speakers. At this point, they need to consider the different types of amplifier kits and evaluate their expertise in putting it together because some kits needs to be soldered manually. Additionally, they should also compare the various components of each kit to ensure that it includes all or most of the equipment that improves their listening experience. Even if a buyer is new to eBay, finding the right amplifier kit is not such a daunting task once all aforementioned factors are considered.

Have something to share, create your own guide... Write a guide
Explore more guides