Guitar Amp Head Australia

What is a Guitar Amplifier Head?

A guitar amp head, often simply referred to as an "amp head," is a component of an electric guitar amplifier that contains the preamp and power amp sections of the amplifier circuitry. Unlike a combo amplifier, which houses both the amplifier and speakers in a single unit, the amp head is a standalone unit that requires an external speaker cabinet to produce sound.

Here's a breakdown of its main components:

1. Preamp: The preamp section is responsible for shaping the tone of the guitar signal. It typically includes various controls such as gain, volume, equalisation (bass, mid, treble), and sometimes additional features like reverb, effects loops, and channel switching options.

2. Power Amp: The power amp section takes the preamp's signal and amplifies it to a level that can drive a speaker cabinet, like combo amps in this regards, but of course a head needs a cab of some sort. Either way, the power amp increases the signal's power to produce the necessary volume and tone.

3. Inputs and Outputs: Amp heads have various inputs and outputs. The main input is where the guitar is plugged in. The speaker output connects to the external speaker cabinet, allowing the amplified signal to be heard. Additionally, there may be effects loops, footswitch inputs, and other connectivity options depending on the specific model.

To use an amp head, guitarists typically connect their electric guitar to the input of the amp head and then connect the amp head to an external speaker cabinet using appropriate speaker cables. The speaker cabinet then produces the sound that the amp head has amplified based on the settings chosen on the preamp section.

Guitar amp heads are favoured by many guitarists, especially tube head options for professionals and those who need more headroom in their setup. They allow for easy customisation of the speaker cabinet choice and the ability to mix and match different amp heads with various speaker setups for different tonal characteristics and volume requirements. Additionally, using separate amp heads and speaker cabinets often results in a more powerful and versatile setup compared to combo amplifiers.

How does a Guitar Amp Head work?

A guitar amp head works by taking the weak electrical signal from an electric guitar, processing it, and then amplifying it to a level that can drive a speaker cabinet to produce audible sound. Here's a step-by-step explanation of how it works:

1. Input: The process starts when you plug your electric guitar into the input jack of the amp head. The guitar produces a very weak electrical signal from its pickups, which carries the audio information.

2. Preamp Section: The signal from the guitar first enters the preamp section of the amp head. The preamp is responsible for shaping the tone of the guitar signal and adding various effects. Inside the preamp, the signal goes through several stages of amplification and is adjusted using controls such as gain, volume, bass, mid, treble, and other tone-shaping knobs.

   • Gain: Controls the amount of input signal amplification. Higher gain settings lead to distortion or overdrive, adding a more saturated sound and drive on the power amplifier.
   • Volume: Sets the output level of the preamp section for a huge range of tones and volumes.
   • Equalisation: Allows you to adjust the bass, midrange, and treble frequencies to tailor the sound to your preference.
     
     

3. Effects (Optional): If the amp head has built-in effects, such as reverb, delay, chorus, or others, the signal may pass through these effects before proceeding to the power amp section.

4. Power Amp Section: After the signal is shaped by the preamp and processed through any effects, it enters the power amp section. The power amp's primary function is to take the preamp's signal and amplify it to a level that can drive a speaker cabinet.

   • Power Tubes: The power amp section typically uses vacuum tubes (valves) or solid-state components (transistors) to amplify the signal. If the amp head uses tubes, the power tubes are responsible for the main amplification stage. Tubes can add warmth and a natural compression to the sound, contributing to the classic "tube amp" tone.
   • Transformer: The power amp output is sent through a transformer that matches the impedance of the amplifier to that of the speaker cabinet.
     
     

5. Output to Speaker Cabinet: The amplified signal, now at a higher power level, is sent from the power amp to the speaker output of the amp head. The speaker output is connected to an external speaker cabinet via a speaker cable to most cabinet combination. 

6. Speaker Cabinet: The speaker cabinet contains one or more speakers designed to handle the amplified signal's power. When the amplified signal reaches the speakers, they vibrate to create sound waves, which are then projected into the air, producing the audible sound you hear.

The combination of the preamp, power amp, and speaker cabinet working together defines the overall tone, volume, and characteristics of the guitar sound produced by the amp head. Guitarists can achieve a wide range of tones by adjusting the controls on the preamp and combining different amp heads with various speaker cabinets.

Which artists use a Guitar Amp Head?

Many artists across various genres use guitar amp heads as a crucial part of their live performances and studio recordings. The choice of amp heads can significantly influence an artist's unique tone and sound. Here are some well-known artists from different genres who are known for using guitar amp heads:

1. Jimi Hendrix: An iconic figure in rock music, Hendrix was known for using a variety of Marshall amplifier heads, including the Marshall Super Lead and the Marshall JTM45 which is one of the recipes for both British amp tones and that sort after American tone.

2. Eddie Van Halen: The late Eddie Van Halen, one of the greatest guitarists in rock history, used a modified Marshall Super Lead amp head to create his signature "brown sound."

3. Eric Clapton: Clapton is famous for using Fender amps, particularly the Fender Twin Reverb, to achieve his renowned bluesy tone and classic British-style tones.

4. Angus Young (AC/DC): Angus Young, the lead guitarist of AC/DC, is known for his aggressive sound created by using Marshall amp heads, like the Marshall Super Lead Plexi. What sometimes doesn't get talked about, is Angus's clean tones, have a listen to their early albums!

5. John Mayer: John Mayer is associated with Two-Rock amplifier heads, which offer a versatile and dynamic tone for his blues and pop-rock style.

6. Dimebag Darrell (Pantera): The late Dimebag Darrell used Randall amplifiers to achieve his heavy and powerful metal tone.

7. Carlos Santana: Santana has been known to use Mesa/Boogie amp heads to achieve his distinct Latin-infused blues rock tone.

8. Keith Urban: The country music star Keith Urban has been seen using a variety of amp heads, including models from Fender and Matchless, to achieve his versatile country and rock sounds.

9. The Edge (U2): The Edge is known for his use of Vox AC30 amp heads, which provide a jangly and chimey tone that complements U2's sound.

10. Slash (Guns N' Roses): Slash used Marshall amp heads, such as the Marshall JCM800, to create the iconic hard rock tones heard in Guns N' Roses' music.

These are just a few examples, and there are countless other artists who have their preferred amp heads based on their musical style and tone preferences. The choice of amp head is a personal one for each guitarist and plays a significant role in defining their unique sound.

What types of Guitar Amp Heads are there?

Guitar amp heads come in various types, each offering distinct features, tones, and applications. Here are some of the most common types of guitar amp heads:

1. Tube Amp Heads (Valve Amp Heads): These amp heads use vacuum tubes (valves) for their preamp and power amp sections. Tube amp heads are well-known for their warm, rich, and dynamic tone. They often produce natural compression when pushed, creating a pleasing "breakup" when overdriven. They are popular among many genres, including rock, blues, jazz, and more.

2. Solid-State Amp Heads: These amp heads use solid-state electronics (transistors) for both the preamp and power amp sections. They tend to be more reliable and lightweight than tube amp heads. Solid-state amps can offer a cleaner and more precise sound, making them suitable for genres like jazz, pop, and some metal styles.

3. Digital Amp Heads (Modelling Amp Heads): Digital amp heads use digital signal processing (DSP) technology to emulate the sounds of various classic and modern amplifiers, as well as effects. They offer a wide range of amp models and effects in a single unit, making them versatile and practical for players who want diverse sounds without carrying multiple amps.

4. Hybrid Amp Heads: Hybrid amp heads combine tube and solid-state technologies. Often, they use tubes in the preamp section for added warmth and utilise solid-state components for the power amp section. These amps aim to offer a compromise between the characteristics of tube and solid-state amplifiers.

5. Multi-Channel Amp Heads: Many amp heads come with multiple channels that allow guitarists to switch between different preamp voicing or gain levels easily. For example, a two-channel amp might have a clean channel and a overdrive/distortion channel, while some amp heads may have even more channels with different tonal options.

6. High-Gain (Metal) Amp Heads: These amp heads are designed to deliver heavy distortion and high-gain tones, making them popular among metal and hard rock guitarists. They often feature multiple gain stages and additional controls for sculpting aggressive sounds.

7. Boutique Amp Heads: Boutique amp heads are handcrafted, high-quality amplifiers made by smaller manufacturers. These amps are often built with premium components, attention to detail, and unique designs. They cater to players who seek a more personalised and exclusive tone.

8. Practice Amp Heads: These amp heads are usually low-wattage and designed for practice and small gigs. They may have headphone outputs, built-in effects, and compact designs for portability.

Each type of amp head has its strengths and characteristics, appealing to different playing styles, genres, and preferences. Ultimately, the best amp head for a guitarist depends on their musical needs, tone preferences, and how they intend to use the amplifier in various settings.

What’s the best Guitar Amp Head to buy in Australia?

The "best" guitar amp head for you will depend on your specific needs, playing style, budget, and personal preferences. However, some popular and highly regarded amp heads that you can buy from Coleman's Music Store Melbourne CBD, or anywhere in Australia online include:

1. BOSS: While BOSS is renowned for its guitar effects pedals, they also produce the "Waza Amp Head" series, which has been well-received for its versatility and high-quality tone.

2. MARSHALL: Marshall is a legendary name in the world of guitar amplifiers. Some popular choices include the "Marshall JVM410H," "Marshall DSL100H," and "Marshall Origin 50H."

3. ORANGE: Orange amplifiers are known for their unique appearance and distinctive sound. In Australia, you can find models like the "Orange Rockerverb 100 MKIII" and "Orange Dual Dark 100."

4. VOX: Vox is known for its classic British tones. Some popular models include the "VOX AC30CH," "VOX AC15CH," and "VOX MV50 Series."

Keep in mind that the availability and popularity of specific models may change over time, so it's best to check with us on (03) 9799 5400 if you've any questions, we’re always happy to help you find the right amp head that suits your needs.

When considering an amp head, make sure to test it out if possible, listen to sound demos, and read reviews to get an idea of how it sounds and performs. Additionally, consider factors like power rating, number of channels, built-in features, and whether it complements your playing style and the music you'll be performing.

What kinds of settings do Guitar Amp Heads have?

Guitar amp heads come with various settings and controls that allow guitarists to shape their tone and customise their sound. The specific settings can vary depending on the model and brand of the amp head, but here are some common settings and controls you might find on a guitar amp head:

1. Gain (or Drive): Controls the amount of signal amplification at the preamp stage. Increasing the gain adds distortion or overdrive to the sound, while lower gain settings provide a cleaner tone. Some head might even have two gain channels or a clean and a gain channel.

2. Volume (or Master Volume): Sets the overall output level of the amp head. It determines how loud the amp will be.

3. Equalisation (EQ): Typically consists of Bass, Mid, and Treble knobs. Allows you to adjust the balance of low, midrange, and high frequencies to shape your desired tone.

4. Presence (or High-Mid): Adjusts the high-frequency presence or high-midrange frequencies to add brightness or smoothness to the tone.

5. Reverb: Controls the amount of reverb effect added to the signal, creating a sense of space and depth in the sound. Digital reverb these days is amazing, and much more reliable than the older spring reverb technology.

6. Effects Loop: Many amp heads have an effects loop that allows you to insert external effects (like delay, chorus, etc.) between the preamp and power amp stages.

7. Channel Switching: If the amp head has multiple channels, you can switch between different preamp voicing or gain levels for different sounds.

8. Power Attenuation (or Power Soak): Some amp heads have built-in power attenuation, allowing you to lower the output power, which can help achieve saturated tones at lower volumes.

9. Impedance Selector: Allows you to match the amp's output impedance with the speaker cabinet's impedance for optimal performance.

10. Standby Switch: A standby switch allows you to turn off the output while keeping the amp powered on, which can help protect the tubes and prolong their lifespan.

11. Presence or Resonance Control: Adjusts the low-frequency response and resonance of the amp.

12. Tone Shift: Some amps have a "Tone Shift" or "Mid-Shift" button that changes the overall midrange character of the amp.

13. Bright Switch: A "Bright" switch boosts the high frequencies, adding more sparkle to the sound.

14. Power Tubes Biasing: Some tube amp heads may have a bias adjustment for their power tubes, allowing you to fine-tune the amp's tone and response.

These are just some common settings and features you might find on a guitar amp head. Different amp heads will have different combinations of controls, and each one contributes to the overall tone and versatility of the amplifier. Experimenting with these settings is essential to finding the sound that suits your playing style and preferences.

Are Guitar Amp Heads good value?

Whether guitar amp heads are considered good value depends on various factors, including the specific model, brand, features, build quality, and your individual needs and preferences. Here are some points to consider when evaluating the value of a guitar amp head:

1. Sound Quality: One of the most critical aspects of an amp head is its sound quality. A good amp head should provide the tone you desire, whether it's clean, crunchy, or heavily distorted. If the amp head delivers the sound you're looking for and complements your playing style, it can be considered a good value.

2. Brand Reputation: Some brands are well-known for producing high-quality and reliable amp heads. A reputable brand may offer better build quality, customer support, and resale value.

3. Features and Versatility: The value of an amp head can also be influenced by its features and versatility. Amp heads with multiple channels, built-in effects, or a wide range of tone-shaping controls may offer more flexibility for different playing styles.

4. Build Quality and Durability: A well-built and robust amp head is likely to have a longer lifespan and require fewer repairs or maintenance, making it a better long-term investment.

5. Power and Wattage: The wattage of an amp head affects its volume and headroom. Consider the power rating based on your performance needs, whether it's for bedroom practice, studio recording, or gigging.

6. Price Point: Price is a significant factor when assessing the value of an amp head. You should compare the features, sound quality, and build of the amp head with its price to determine if it offers good value within your budget.

7. Compatibility with Speaker Cabinets: Ensure that the amp head is compatible with the speaker cabinets you plan to use, as this can impact the overall sound and performance.

8. Resale Value: While not the primary consideration, a well-regarded amp head from a reputable brand may retain its value better in the used market if you decide to sell it later.

It's essential to research and read reviews from other guitarists, try out different models in music stores, and consider your own playing needs before making a decision. Ultimately, a guitar amp head that meets your requirements, delivers the tone you love, and fits within your budget can be considered a good value for you personally.

Buy Guitar Amp Heads from Coleman’s Music Store in Melbourne CBD or online in Sydney, Brisbane, Hobart, Canberra, Adelaide or anywhere else in Australia!

When you're looking for a Guitar Amp Head, even on a tight budget, simply buy online today or get in touch with the friendly Coleman's Music team and our stores in Melbourne CBD, with fast online Guitar Amp Head shipping all over Australia, or give us a call on (03) 9799 5400 with any questions, we’re always happy to help!