I want to know the answer to the following question:
When was the business booming for do it yourself sound fanatics?
All the background I'm provided with is that "The business grew quickly and interest spread in high fidelity sound and the do-it-yourself market for pickups, turntables, amplifier kits, loudspeaker enclosure plans, and AM/FM radio tuners.". Is that enough to answer the question?
Answer: no