"Do you know anything about them? "
-> There are two main Taiwanese manufacturer in the headlamp business, namely TYC and DJ Auto. I bought DJ Auto headlamps. I got these from brick and mortar Volvo parts store in my town. So they must have checked for quality beforehand. Beside its having different cover style for the main H4 bulb (compared to OE) the headlamp doesn't have any other issue. Sorry can't comment about TYC.


"There's also a removable ball socket for the main UP/DOWN reflector that seems to limit the ability to raise the main reflector. What's with that?"
--> Some 940 models have headlamp aim switch at dashboard. The socket is for attachment of small motor for headlamp aiming. When the car is fully loaded at the back, the driver could aim the headlamp slightly low to compensate for slight tilting up at car's front. If your 940 doesn't have headlamp aiming device you shouldn't be meddling with this. My guess is that you had unscrewed the "ball" thing out its "socket" and now you couldn't adjust the aim using the knob.

I have meddled with this too! Ha!

All you have to do is to put the "ball" back into its "socket". Extend (make it longer) the "ball" thing while its out of headlamp. Then try to install it (push it) into its "socket" while holding the main reflector steady (hold steady via the main bulb opening). Until you feel a click or feel that the "ball" has gone into the "socket". (Try this a few times, some lubrication might be helpful on the "ball" ie. grease)

Then screw/secure the whole thing back onto the headlamp enclosure. Now your main reflector should be tilted down (headlamp aims down, you could see this thru headlamp's main glass). This due to the "ball" thing is installed "longer". Use the knob to correct the aim back to UP.

Amarin.