Fender Mustang LT40S Guitar Amplifier
- 40 watts, stereo output
- Dual 4 inch speakers in a desktop combo
- Digital modeling amp and effects
- USB connection plus headphone out
- Full-color display with onboard presets
- 14.7 pounds, 14.4 inches wide
- 2 year manufacturer warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small modeling combo for practice at home, with presets, a display and a computer app for editing. It is described as a desktop practice amp, not a stage amp.
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ASIN: B0B3ZXMVWMModel: LT40SCategory: Combo Amps
Overview
A bedroom or living room practice corner is where the Mustang LT40S is aimed, with two small full range speakers in a compact metal cabinet. Onboard amp and effects models cover a range of electric guitar tones, and a free desktop app handles preset editing.
Presets and a color display make setup simple for a newer player. The free Fender TONE LT desktop app adds preset editing and storage on a Mac or PC. The small cabinet and modest power point to practice and jamming rather than loud gigs.
Who it's for
Home players working through songs with presets and headphones are the target here. Players who want to share a stage with a band, or who need more than one instrument input, should look at a larger amp.
Pros and cons
- Amp and effects models onboard
- Color display and simple controls
- USB and headphone connections
- Free desktop app for presets
- Described for home practice, not stage use
- Single channel output quantity
- Cabinet size limits low-end volume
Performance notes
Digital modeling recreates amp and effect tones in the signal chain, so one small cabinet can cover many styles through presets. Two small speakers spread the sound in stereo, and headphone out lets practice stay quiet.
Specifications
| Model | LT40S |
|---|---|
| Dimensions & fit | |
| Item Dimensions D x W x H | 8.3 x 14.4 x 8 inches (D x W x H) |
| Speaker Size | 4 inches |
| Weight | 14.7 pounds |
| Capacity & performance | |
| Output Wattage | 40 watts |
| Audio Output Mode | Stereo |
| Power & efficiency | |
| Power Source | Corded electric |
| Construction & materials | |
| Enclosure Material | Metal |
| Compatibility & installation | |
| Compatible Devices | Guitar |
| Warranty & support | |
| Warranty Description | 2 year manufacturer |
| Other details | |
| Amplifier Type | Digital modeling |
| Connector Type | USB |
Closest rivals on specs
Fender Champion II 25 Watt Electric Guitar Combo Amp- Output Wattage 40 vs 25 watts (+60%)
- Speaker Size 4 vs 8 inches (-50%)
Fender Mustang LT25 Guitar Amplifier- Output Wattage 40 vs 25 watts (+60%)
- Speaker Size 4 vs 8 inches (-50%)
Fender Frontman 20G Electric Guitar Amplifier- Output Wattage 40 vs 20 watts (+100%)
- Speaker Size 4 vs 8 inches (-50%)
Frequently asked questions
Is the Fender Mustang LT40S a stage amp?
The listing describes it as a desktop practice amp for beginners and home use, with 40 watts and dual 4 inch speakers, so it is not marketed for gigs.
Can I edit Mustang LT40S presets on a computer?
Yes. The description names the free Fender TONE LT desktop app for Mac or PC to edit, store and manage presets.
Does the LT40S have a headphone output?
Yes, headphone out is listed in the item highlights.