The Sega Mega-CD Model 1 — sold as the Sega CD in North America — is the front-loading CD-ROM add-on that docks under the Genesis Model 1 via the console's right-side expansion connector. Audio handling is the most interesting bit of its rear panel: two RCA stereo outs for the CD-mixed audio, plus two RCA stereo ins for the optional 'audio mixing cable' that takes the Genesis's front-panel 3.5mm headphone output and feeds it into the CD unit so a single set of speakers can hear both the Genesis and CD chips. Power is a proprietary AC adapter inlet.
Sega’s 1991 front-loading CD-ROM add-on for the Genesis Model 1 — stereo RCA audio out, RCA audio line-in for the Genesis mixing cable, and a side expansion connector.
Device Information
- Manufacturer
- Sega
- Release Year
- 1991
- Model Number
- MK-4102 (US) / HAA-2910 (JP)
- Category
- Gaming Console
Source: manufacturer product page · Last updated: · How we verify port data →
Available Ports
| Connector | Quantity | Power (PD) | Capabilities | Label | Notes |
|---|---|---|---|---|---|
| RCA Stereo Audio | 1 | — | — | AUDIO OUT L/R (rear) | Stereo CD-mixed audio output on a pair of RCA jacks (left + right). Connect to any line-level amp or RCA-input speakers. |
| RCA Stereo Audio | 1 | — | — | AUDIO LINE-IN L/R (rear) | Stereo line-in on a pair of RCA jacks (left + right). Fed by the included Sega audio mixing cable, which plugs into the Genesis Model 1's front 3.5mm headphone jack so the CD unit's outputs mix both Genesis and CD audio. |
Notes & Compatibility
Rear: 2x RCA stereo audio out (L+R, modelled as one RCA Stereo Audio entry), 2x RCA audio line-in (L+R, modelled as one RCA Stereo Audio entry — sourced from the Genesis Model 1 front headphone jack via the included mixing cable), proprietary AC adapter inlet (Sega MK-1602 PSU — not modeled, no user-cable equivalent). Left side: edge expansion connector that mates with the Genesis Model 1’s right-side I/O — not modeled as a user-cable port. No video output of its own; video passes through the Genesis.
Common questions
How many ports does the Sega Mega-CD (Model 1, 1991) have?
The Sega Mega-CD (Model 1, 1991) has 2 ports in total: 2 × RCA Stereo Audio.
Does the Sega Mega-CD (Model 1, 1991) have HDMI?
No. The Sega Mega-CD (Model 1, 1991) has no HDMI port. No video-capable port is recorded for this device.
Does the Sega Mega-CD (Model 1, 1991) have a headphone jack?
No. The Sega Mega-CD (Model 1, 1991) has no 3.5 mm headphone jack. Its audio connections are 2 × RCA Stereo Audio.
