Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: BOSS Audio RGF1600 Rage 1600-Watt Full Range, Class A/B 2 to 8 Ohm Stable 4 Channel Amplifier with Remote Subwoofer Level Control
Product description: Experience the power of the Boss Audio Rage RGF1600 Class A/B Full Range 4-Channel Amplifier. This 2-Ohm stable Amplifier features 1600 Watts Max Power with a MOSFET power supply for efficient power and great sound. Customize the sound with Variable Low Pass Crossover, Fixed High Pass Crossover and Bass Boost. Boost the Bass with the Remote Subwoofer Control. Bridge channels for more power and flexibility. The Rage Series of Amplifiers hits a home run offering great cosmetics, including blue illuminated end panel light strips, and outstanding performance at excellent price points that cover all size and power applications. Take your entertainment experience up a notch with the Boss Audio RGF1600.
Product feature: 1600 W MAX Power, 4 Channel 300 W X 4 RMS @ 2 ohm 150 W X 4 RMS @ 4 ohm 600 W X 2 RMS Bridged @ 4 ohm, Full Range, Class A/B, MOSFET Power Supply, High and Low Level Inputs, Fixed High Pass Crossover, Variable Low Pass Crossover, Variable Bass Boost, Remote Subwoofer Control, Blue Illuminated End Panel Strips, 6 Year Platinum Dealer Warranty, Remote Subwoofer Control with Cable, 2 High Level Input Plugs, Owner's Manual, Warranty Card, Class A/B Full Range 4-Channel, MOSFET Power Supply, 1600 Watts @2-Ohms Max Power, 300 Watts x 4 RMS @2-Ohms, High and Low Level Inputs, Fixed High Pass Crossover, Variable Low Pass Crossover, Bass Boost, Remote Subwoofer Control, Bridgeable
Product brand: BOSS Audio Systems
Target attributes: Class
Answer: attribute: class
value: class a/b
source: product feature
attribute: class
value: class a/b
source: product title
attribute: class
value: class a/b
source: product description