Hey all!

Have my Quadra 950 currently setup on the "using" desk and stuck a CD in to listen to.. but no audio! I see there is a header between the RAM slots for audio in, but as far as I can tell it doesn't look like the standard cd audio port. I took out the cable from my 6100 and that was not the same. Tried another one from a umax clone, that didn't fit. What kind of cable is it?

>> eric said:

Hey all! Have my Quadra 950 currently setup on the "using" desk and stuck a CD in to listen to.. but no audio! I see there is a header between the RAM slots for audio in, but as far as I can tell it doesn't look like the standard cd audio port. I took out the cable from my 6100 and that was not the same. Tried another one from a umax clone, that didn't fit. What kind of cable is it? Click to expand...

I'll have to look in mine later, I looked in the apple service guides I have as well as the manual and found nothing that would give the part number for the CD carrier, I imagine that connector is for the tape drive (if not my apologies have to check later).

Wait a minute found some information, a standard cable should work but you have to select it to ID 5. Here's a snippet of the apple service guide from 1994.

Mine is a 4 wires cable.
Audio is working fine with it, whatever the SCSI ID. The ID 5 in the apple service guide is just a suggestion,
with pictures

@Borgmac Do you have a photo of the other end of the cable? Thats the one that doesnt look "standard" to me.

Does it look like any of these?

https://www.walmart.com/ip/IEC-L71317-Universal-Cable-for-CD-ROM-Audio/193445417

I'm not sure, it looks odd to me. And good to know there are so many types. Here's the best picture I could get

There's one for $1.90 on Buyee link here.

>> eric said:

@Borgmac Do you have a photo of the other end of the cable? Thats the one that doesnt look "standard" to me. Click to expand...

Both ends are the same and the cable is exactly the one on Buyee that jajan547 suggested.

>> Borgmac said:

Both ends are the same and the cable is exactly the one on Buyee that jajan547 suggested. Click to expand...

This buyee cable is the same one as I took out of my 6100 - and it doesnt fit. If you look at the photo of my board it has a notch and two openings, both key'd.

Just to make sure, you did removed the 2 jumpers from the connector you showed right?

It does look like you still have the jumpers attached.

Yes, @eric. Jumpers still there. I wonder why? Must be a function to determine setting for audio connection?

>> alxlab said:

Just to make sure, you did removed the 2 jumpers from the connector you showed right? Click to expand...

Well, who would have thought there would be jumpers on an audio connector? Then yes it's the same as my 6100's cable/buyee link.

Thanks for the help!

For what it's worth that header is a Molex 6410 series KK 254 which should work with the female version with friction ramp in case someone wants to build their own or look for an inexpensive cable.

That makes sense. I didn't recognize those parts as jumpers.

They're probably a bodge to prevent oscillations or other interference without an input.

Wonder if these KF2510 will work
https://www.aliexpress.com/item/1005002897922435.html

Just bought some to test. Will find out in a month.

>> eric said:

Well, who would have thought there would be jumpers on an audio connector? Then yes it's the same as my 6100's cable/buyee link. Thanks for the help! Click to expand...

Looks like this jumper was there from Apple. CD-ROM was actually an update. Attached copy of the Apple Service Source

Yes the connector between the RAM slots is for CD audio input. With no cable, there should be two jumpers installed grounding the input to reduce noise.

Remove the jumpers and any 1x4 pin connector with 1mm spacing should fit it. It's the same metal pins and electrical layout as any other CD audio connector, with left and right audio on the outside and the center two pins being ground. Any CD audio cable should work, but they look funky in this older style Molex connector.