Adafruit HD800 to 3.5mm 0.78 MMCX Adapter 2 in 1 Accessory
Connects Sennheiser HD800-series headphones to 3.5 mm and 0.78 mm MMCX cables using high-purity OFC conductors, supplied as a pair weighing 14.4 g each at 1.46 inches long
- Connects Sennheiser HD800 series to 3.5 mm and 0.78 MMCX cables
- High-purity OFC copper with electroplating preserves signal integrity
- Male-to-female converter enables headphone modding and cable upgrades
- Compact 1.46 inch length and 14.4 gram weight for portable use
- Includes a pair of adapters for left and right channels
HD800 to 3.5mm 0.78 MMCX Adapter
This pair of adapters connects Sennheiser HD800, HD800S, HD820 and D1000 headphones to cables terminated with 3.5mm 0.78 MMCX plugs. Each unit is built with high-purity OFC copper and electroplated contacts for reliable signal transfer. The compact 1.46 inch length and 14.4 gram weight keep the connection unobtrusive during listening sessions.
Audiophiles modifying premium Sennheiser headphones
Owners of the listed Sennheiser models who want to use aftermarket cables with 3.5mm 0.78 MMCX connectors will find this adapter pair a direct fit. Users of other headphone brands or those requiring different termination types should look elsewhere. The adapters serve purely as a mechanical and electrical bridge and do not alter the headphone's native sound signature.
3.5mm 0.78 MMCX female socket specification
The critical specification is the female 3.5mm 0.78 MMCX socket that accepts compatible male cable plugs. This interface determines whether your existing or planned cable will mate securely with the HD800-series headphone side. Verify that your cable terminates in a matching 3.5mm 0.78 MMCX male connector before purchasing.
How it compares
Measured against everything we stock in 2-in-1 Device Accessories, at today’s prices. Recalculated every night.
- Price $51.99
- Cheaper than about 57% of the 7,473 comparable items (median $56.99).
New to this? Buying a laptop with crypto, start to finish — what to check, what it costs to pay, and what is never asked for.
Specifications
No published specifications for this item yet.
Questions about this item
Which Sennheiser headphones accept the HD800 male connector on this adapter?
The HD800 male end fits Sennheiser HD800, HD800S, HD820 and D1000 models.
Can I keep using my existing 0.78 mm 2-pin or 3.5 mm MMCX cables with this adapter?
Yes, the female side provides both a 0.78 mm 2-pin socket and a 3.5 mm MMCX socket for those cables.
How do I confirm the adapter is passing signal correctly after connecting it?
Play audio through the chain; sound should come through both channels without noise or dropouts.
More in 2-in-1 Device Accessories
Similar items
GSM Outdoors 2 in 1 Accessory Fall Green Orange Stripes 11 2024
Microsoft GJ3-00001 Docking Station 2 in 1 Accessory
- Docking Station
- Full-Size
ARENTI 2 in 1 accessory for iPad 11th (A16) 11" 2025 / 10th Gen 10.9" 2022, Sea Marble
Microsoft QC7-00001 Surface Pro 4 Type Cover Black 2 in 1 accessory
- Keyboard Case
- Black





