Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Vox Pathfinder 10w Bass Combo Amp
Product description: From the diamond grille cloth and basket-weave vinyl wrap to the vintage chicken-head knobs, the Vox Pathfinder Bass 10 shows off its Vox pedigree. In spite of its compact design, the Pathfinder Bass 10 boasts 10 watts of power pushing a pair of 5" Vox Bulldog speaker for a powerful bass sound. In addition to the Bass and Treble controls, the Bright switch adds an edgy boost to the upper harmonics. Turning up the Drive control provide a modern, warm bass distortion that adds character and vitality to the tone. A headphone/line output jack is also provided for silent practice, and for direct recording.
Product feature: Two 5" Vox Bulldog speakers, 10 watts of power, Drive control for adding distortion, Bright switch for edgy tone, Headphone jack
Product price: $26.24
Product brand: Vox
Target attributes: Number of Channels
Answer: attribute: number of channels
value: None
source: None