Onkyo D3520A
Surviving information on the Onkyo D3520A is thin, but what exists points to a clear identity. It is a horn-loaded mid/high-range driver unit, most often found as a pair, and it is associated with Onkyo's Scepter series loudspeakers. The model number often shows up next to a companion horn designation. Listings read "ONKYO D3520A H2014P" or "ONKYO D-3520A + H-2014P", which suggests the D3520A was the compression driver half of a matched horn assembly.
The strongest thread ties the D3520A to the Onkyo Scepter 500, the company's flagship speaker of its era. Multiple independent reseller listings describe these drivers as pulled from Scepter 500 systems. One Polish source calls them "mid/highrange tweeters" from the Scepter 500 and says they handled reproduction from 5 kHz upward. A Russian listing also says they came from "legendary Onkyo Scepter 500" speakers, but calls the role a midrange driver. The exact crossover point and band assignment stay ambiguous across sources, so treat those specifics with some caution. The Scepter 500 connection itself is consistent and well-attested.
What little technical data exists comes from a single Yahoo Auctions Japan listing. The driver is rated at 8 ohms with a maximum power handling of 100W. A Russian import service page records the original price at ¥24,000 per piece, so this was never a budget component. No frequency response curve, sensitivity rating, dimensions, or weight have surfaced. Production years are not documented.
The D3520A is a driver unit, not a complete loudspeaker. It has no inputs, outputs, or amplification of its own, and it needs a crossover and enclosure (or horn assembly) to work. A Japanese buyback service appraised a pair at ¥0 in August 2019, noting visible scratches, dirt, and signs of age, though a sound output check reportedly confirmed no problems. That zero likely reflects the condition and the small market for bare drivers, not any judgment on the unit's quality.
For collectors, the D3520A's appeal is inseparable from the Scepter 500 legacy. If you find a pair in good shape, you're holding the heart of one of Onkyo's most respected speaker systems — but beyond that, the documentation trail simply runs out.
Known Specs
- Type: Horn-loaded mid/high-range driver unit (sold as pairs)
- Impedance: 8Ω
- Maximum power handling: 100W
- Original price: ¥24,000 per piece
- Associated model: H-2014P horn (listed alongside D3520A)
- Used in: Onkyo Scepter 500 speaker system
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