Following is the current tariff on loudspeakers.
Assuming you buy the 67000 model
Basic Custom Duty: 15% - 10050
Social Welfare Surcharge 10% of Custom Duty - 1005
Total: 78055
Additional 18% IGST: 14050.
Total cost after all import charges: 92105
Duty + taxes portion - 25105
In percentage: 37.4%
However, often I have read that hand carried electronics escapes duty