Heads
In the context of electric guitar amplifiers and preamps, the term "heads" typically refers to the amplifier component of a guitar amplifier stack. A guitar amplifier stack consists of two main parts: the amplifier head and the speaker cabinet. Here's what you need to know about amplifier heads:
Function: The amplifier head is responsible for amplifying the electrical signal generated by the guitar's pickups. It's where the preamp and power amp sections are housed.
Preamp: The preamp section of the amplifier head shapes the tone of the guitar signal. It typically includes controls for adjusting gain, equalization (e.g., bass, mid, treble), and various tone-shaping options.Musicians can use these controls to fine-tune their sound.
Power Amp: The power amp section amplifies the preamp's signal to a level that can drive the speakers. It determines the overall volume and headroom (the ability to handle high volumes without distortion) of the amplifier.
Compatibility: Amplifier heads are often designed to work with specific speaker cabinets, and they need to be matched in terms of impedance to ensure proper operation and sound quality.
Variety: There's a wide variety of amplifier heads available, ranging from small, low-wattage practice amps to high-powered, professional-grade heads used on stage. Different amplifier heads have different tonal characteristics and features, making them suitable for various musical styles.
Brands and Models: Many well-known manufacturers produce amplifier heads, such as Fender, Marshall, Vox, Mesa/Boogie, and many others. Each brand may have its unique design and tonal signature.
Effects Loop: Some amplifier heads feature an effects loop, which allows you to insert external effects, such as reverb, delay, or modulation, into the signal chain.
Footswitch Compatibility: Amplifier heads are often designed to work with footswitches, enabling the guitarist to control various functions, like channel switching or effects, without bending down to adjust settings on the amp.
Tube vs. Solid-State: Amplifier heads can use different types of amplification technology, such as tubes (valves) or solid-state. Tube amps are known for their warm and natural sound, while solid-state amps offer reliability and durability.
Pricing: Amplifier heads come in a range of price points, from budget-friendly options suitable for beginners to high-end models used by professional musicians.
It's important to note that when using an amplifier head, you'll also need a suitable speaker cabinet to complete your guitar amplifier setup. The combination of a compatible head and cabinet plays a significant role in shaping the overall tone and sound projection of an electric guitar.