![]() ![]() Modelling amps try to emulate this effect sometimes, when using crunchy or overdriven tones for example. In the case of an analogue valve (or tube) pre-amp section, such analogue break up or distortion can often be pleasing and desirable to the human ear as it adds additional harmonic elements to the signal and does not clip in the same way that a transistor or digital amp would (which often sounds harsh by comparison and can introduce digital artefacts to the sound). passive v active pickups, etc.) or, for tonal effect to deliberately overdrive the pre-amp section and cause it to “break up” or distort. The pre-amp gain (or input gain) of your amp determines how much your initial signal is amplified by and can normally be adjusted to either accommodate different levels of output of different guitars (e.g. It is the pre-amp section of your amp that your amp’s tone controls (typically bass, mids and treble) apply to and where you can begin to shape your sound. The pre-amp – where the relatively weak instrument-level signal from your guitar or bass is amplified to a level that the power amp section can then amplify further, enough to drive a speaker (or speakers).The tonal colouration imparted to your audio signal by guitar and bass amps occurs in three main areas: This is possible and you may find this gives better results when connecting to the front end of a guitar or bass amp by using the physical amp’s pre-amp tones instead of those provided by the virtual amp in the Spark. Of course, you may wish to use your Spark purely for the pedal sounds that it can provide and turn the amp and cab emulation off completely within your patch / preset. Whilst it will work, this “double-stacking” of tonal colouration can lead to muddy-sounding or sub-optimal tone to your signal and is not the recommended way of amplifying the Spark’s signal. the “Marshall sound” or the “Vox sound”). For this reason, it is not ideal to then connect any of the Sparks to regular guitar amps which impart their own amp and speaker cabinet tonal characteristics to your signal chain (this is what gives certain amps and speaker cabinets their signature sounds that they are known for – e.g. This modelling closely replicates the EQ curves and frequency responses of the real-life gear it is trying to emulate. BackgroundĪll of the presets available on the Spark range of amps include both amp and speaker/cab modelling accompanied by various types of effects. Do your own research and understand your own equipment. This post is a guide only and neither the author nor the Admins of this groupaccept any responsibility for any damage caused to your equipment by following the information contained within it. Audio signals are essentially electrical voltages and these too vary widely at various stages of the signal chain and dependent on the nature and specifications of your equipment. To help you decide on the best connection options for your specific use case given the type of Spark that you own and the external audio equipment that you plan to use.Īudio equipment is hugely varied and contains many different types of connectors and cables. With the release of the Mini and the GO, both of which feature switchable line level outputs from their headphone sockets, Positive Grid have now made this even easier and more straightforward to do. When using the Spark in this way, it is often beneficial to be able to connect the device to external amplification equipment to increase the available volume and allow it to be heard above people and other instruments. Whilst the Spark range of amps from Positive Grid are primarily designed with home practice use in mind, many people have found that there is considerable utility to be had when using these devices in larger settings such as at parties/gatherings and in live performances. Read more about Darren at the end of this article.
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