The cheapest AND quietest way is to mount PC fan onto the chassis of hot component(I believe amp). You will need to ID available DIN for fan and measure the voltage between terminals in order find proper fan. Than it's only mechanics to mount the PC fan or couple onto the chassis.
Plan B: If you have wife or GF, you can get pheasant feather fan and give it to her while listening:-)
Plan B: If you have wife or GF, you can get pheasant feather fan and give it to her while listening:-)