The Marshall MG10CD is a popular 10-watt solid-state practice amplifier produced around 2004–2008. It is a 2-channel combo designed for home practice and features a 1x6.5" speaker. 

This was used 2 times for recording into Logic Pro and worked fine. In other words it just works.This is near mint condition. A fantastic sounding amp. I nick-named it my little British Titan on the first day in the home studio. IMHO: it's an awesome find because it sounds good and it's light weight and portable. The power cord is just over 5 feet long. Unique Contour knob allows you to dial out pick attack noise - Just hear the notes you play. Yay ! You can plug in a CD player or Mp3 player and play along. Has headphone/ line out too.

What does the manufacturer say: Marshall's proprietary FDD (Frequency Dependent Damping) circuitry that accurately mimics the interaction of an all-valve amp's power stage with loudspeaker(s) it is driving. As a result, the MG amps respond and 'feel' more like valve amplifiers than others in the price range.

Key Specs & Features (circa 2005):

• Model: Marshall MG10CD (MG Series)
• Type: Solid-State Combo
• Output Power: 10 Watts RMS
• Channels: 2 (Clean and Overdrive)
• Speaker: 1 x 6.5" Custom Marshall Speaker
• Controls: Clean Volume, Overdrive Gain, Overdrive Volume, Contour Tone Control
• Inputs: 1 x 1/4" Guitar Input, 1 x CD/MP3 Input (3.5mm)
• Outputs: 1 x Emulated Headphone/Line Out
• Manufactured: Korea 

Key Features:

• Contour Control: A global tone control that adjusts the mids for either a classic or modern sound.
• Emulated Output: Allows for silent, recorded, or headphones-based practice with a "speaker-simulated" sound.
• Compact Design: Designed for portability and bedroom practice. 

Note: While some listings show "40W," this typically refers to the input power/power consumption of the unit rather than the output wattage