This is the Crews Maniac Sound GB-V1 power attenuator. It's a popular model that allows you to control the volume while maintaining the original drive feel of your amplifier. It's very convenient for improving your home practice and recording environment, and it also supports silent practice with its headphone output. ⸻ 【Product Condition】 ・Operation confirmed, works without any problems ・No crackling or noise ・Minor scratches and signs of use on the exterior (see photos) ・Fine scratches on the rubber feet on the bottom and the top surface ・Overall in good condition for a used item ⸻ 【Specifications】 ・Compatibility: 8Ω / 16Ω ・Power Handling: 150W ・Terminals: - from AMP (amplifier input) - to SPEAKER (speaker output) - LINE OUT ・Headphone output equipped ・Line level adjustment knob ・Equipped with a fan for effective heat management ⸻ 【Included Items】 ・Main unit only ⸻ We will carefully pack and ship it promptly. This is a popular GB-V1 series, so please consider it!