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Spider® IV 15 and Spider IV 30 deliver best-selling rock star tones. Feast your ears on industry-leading Line 6 amp and FX modelling, dialed-in tones and presets, and much more.
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Smart FX.

Smart FX knobs put award-winning Line 6 effects at your fingertips. Easy to use, Smart FX let you spend less time tweaking and more time playing. Easily add or remove any amount of lush reverb, exceptional echo, tangy mods, and more. The knobs are located on the amp's front panel, so you can make all your adjustments on the fly.
Spider IV 15 features 6 Smart FX. Spider IV 30 features 7 Smart FX, including a dedicated Reverb.
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Tap tempo.

Sync up your effects like a pro with on-board Tap Tempo. With two pushes of the Tap Tempo button, all of your time-based effects will fall in line with military precision. The peaks of your Tremolo will match the feedback of your Sweep Echo, and so on.