XHA901 Preamp Tone Board Purpose and performance Designed for use with power amplifiers to provide audio amplification and adjustable , mid, and low frequency control Enhances listening experience by offering tone shaping in addition to amplification Uses the original dualcore NE5532 chip for audio processing Power requirement: DC 12 to 24 V Wiring and input notes Wiring caution: Distinguish positive and negative poles when wiring Audio input: 3P audio cable Appearance and specification notes Color: Random; color not specified in the specification Key benefits Simple integration with existing power amplifiers to add amplification and tone control Clear /mid/low frequency adjustment for tailored sound Reliable dualopamp performance with a straightforward DC power supply Practical use scenarios Home stereo upgrade: Connect a source to the XHA901 and route to a power amplifier to achieve better tone control and louder, cleaner output DIY audio projects: Incorporate as a preamplification stage in custom amplifier builds to shape frequency response Small venue or practice setup: Use to balance and amplify signals from microphones or line sources before driving a power amp for clearer sound in limited spaces