The advantage of a double conversion receiver over a single conversion receiver is that it:

Single conversion receivers often face a design compromise. A low intermediate frequency (IF) provides excellent selectivity (separating adjacent signals) but poor image rejection. Conversely, a high IF provides excellent image rejection but poor selectivity. A double conversion receiver solves this dilemma by using two IF stages. The first conversion uses a high IF to effectively push the 'image frequency' far away from the desired signal, making it easy for the front-end filters to reject it. The second conversion brings the signal down to a low IF, allowing for sharp, high-quality filtering and selectivity. Options suggesting better sensitivity or louder audio are incorrect. Sensitivity is primarily determined by the front-end RF amplifier and overall noise figure, while audio volume is controlled by the AF amplifier stages, neither of which dictate the need for double conversion.