The spring reverb is the broadband resonance generated by vibrating one or more metal coils held together under tension.
A spring reverb pedal is made up of three main components: one or two drivers, metal coils assembled in a pan and one or two pickups. The combination of pan and springs is called a “tank”.
The main system is that: The transformer transfers the electrical signals into the mechanical motion. This mechanical motion modulates the spring, which then carries a similarly shaped wave across its length and then mechanically moves a magnet on to the other end.
This moving magnet generates the current across a pickup, which then amplified into an output signal. The spring automatically starts to send that wave back and forth along its length.
This very effectively just turns the single impulse of energy into a decaying wave shape. This tail creation of fast echoes is most of the reverb sound. However, the sweeking of the sound itself adds to this effect automatically. The natural inertia of the spring coupled with electrical resistance, which changes the transient response and frequency response. The presence of multiple springs increases the diffusion effect and comb filtering. In addition, this all equates something that still does not sound like the reverb.
The Qualities of the Spring Reverb
The main quality of the spring reverb is the quintessential bouncy quality. This is due to timing between echoes. In order to create each reflection, the wave needs to travel the length of the spring hit. The transducer keeps the waves back the length of the string hit a boundary and once again travels the length of the spring back to the transducer. This is one of the inexpensive methods for generating reverberation.
Springs are low frequency very focused in a very specific and a good way Spring reverbs propagate reverse transverse waves that mean the coils, which are present in the spring, are actually rotating and then causing subsequent coils to rotate and that is effectively what is creating the wave shape.
One of the weird disadvantages of this movement is that low frequencies, which have their longer wavelengths, actually rotate more coils than high frequencies. In other words, in which I can tell you that while the highest of frequencies might only cause single coils to turn at a time lower frequencies may be moving multiple coils simultaneously and continuously.
The common uses of the spring reverbs
Now that we understand how the spring reverb works, lets’ go ahead and talk about some common uses of the spring reverbs.
This is not a reverb but kind of a reverb sound is very surreal or real. A very good sound paints unworldly pictures.
Many guitar amps have spring reverbs built right in. Because of this, the springs are to guitars way ketchup to burgers. We are very culturally used to the sound of the spring reverbs in guitars of the modern day world.