Summary Rumble LT25 incorporates what we've learned over decades of producing the best-sounding bass amps on the planet. It's ideal for any bassist who wants a great-sounding, easy-to-use amp with a super-simple user interface. A collection of 50 presets covers a wide range of music - a "greatest hits" of electric bass tones. The versatile signal chain with high-quality onboard amp and effects models produces amazing tones, making it an ideal practice amp for home or office. Features 25-watt combo amplifier Single 8" bass speaker Ported wooden cabinet 1.8" color display Stereo headphone output for silent practice Compatible with Fender Tone Desktop App How do I update the Firmware on the Rumble LT25 amplifier?