SEGMENT INFORMATION (Summary of Segment Information) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Net sales	$ 12,624,170	$ 12,265,069
Cost of goods sold	7,850,572	8,079,622
Selling, general and administrative expenses	6,510,721	6,057,606
Net loss	(874,831)	(950,911)
Cash and cash equivalents	2,807,797	2,837,081
Short term investments	12,879,882	12,104,459
Long term investments	4,000,774	4,994,327
Inventories	4,885,067	4,473,680
Total segment assets	37,184,609	37,199,479
Headphones and Related Accessories [Member]
Segment Reporting Information [Line Items]
Net sales	12,624,170	12,265,069
Cost of goods sold	$ 7,850,572	$ 8,079,622
Gross profit margin	37.80%	34.10%
New product certification and compliance testing	$ 226,719	$ 22,036
Legal and professional fees	999,359	940,090
Deferred compensation expense	133,330	96,004
Other selling general and administrative expenses	5,151,313	4,999,476
Selling, general and administrative expenses	6,510,721	6,057,606
Net loss	(874,831)	(950,911)
Cash and cash equivalents	2,807,797	2,837,081
Short term investments	12,879,882	12,104,459
Long term investments	4,000,774	4,994,327
Inventories	4,885,067	4,473,680
Total segment assets	$ 37,184,609	$ 37,199,479