Car audio experts - some help with install please

[McLovin]

I’ve never been a huge car audio guy, but I’ve always wired up my basic radios.
I’ve never used a separate amp, though.
I’m installing the Blaupunkt Bremen SQR 46 DAB, along with a small Alpine KTP 445U amp.
My car also has a powered antenna that goes up and down when the radio is turned on.
I think I have the powering circuit correct, but can any experts confirm?

Here’s the Alpine amp instructions




And here’s how I think it should be wired. (The numbers correspond to the numbers on the Alpine amp instructions).
Note that my head unit only has one blue output trigger wire (it’s marked “power antenna”).
I plan on attaching both trigger wires for the powered sub and the Alpine amp to that wire, as shown on the diagram below



Seem ok?
(One other question, couldn’t I have the blue antenna trigger wire wired directly to the antenna, Alpine amp and powered sub? All three of those trigger wires attached to the head unit antenna trigger wire)

[McLovin]

This is the powered sub, if it helps

[onZedge]

Typical car audio color code has the yellow wire going directly to the battery through a fuse. The blue/white is what turns the amp, and powered sub, on and off.

[908/930]

Not an expert but have done many.

From amp, Yellow to batt ( Make sure you fuse it for the size of wire at batt) make sure this is heavy enough for your powered sub also.

What you have there looks right for the trigger lines. Strange how that amp has the trigger on the opposite side to ground and +12v

Yes you can normally attach all the trigger wires direct to the deck, or you could use the relay in the AMP to turn on both the sub and the PWR antenna.

[McLovin]

My uncertainty comes from #7 and #11 coming out of the Alpine amp.

It’s odd because they are both identical blue/white. And they have the exact same name on the diagram. But they seem to have VERY different functions.(One is 12v in and the other is 12v out).

[908/930]

Yes, on that amp one blue white is used to turn it on and the other output is to turn other amps on using a relay inside the amp, useful if you are running a bunch of amps, that way you cant overload the relay in the head unit.

Don't run the yellow (#9, +12v) power into the amp from switched source if you need to run a +12v wire for your sub. Run a 10GA wire from batt and fuse at 25A at battery to power both.

Best to attach ground for the amps near to where the radio is getting its ground from, you don't absolutely need to but if you end up with a slight buzz or hum that is likely its cause, basically a difference in ground voltage.

[RANDY P]

What everyone else says- Yellow straight to battery, and use fuses within 6 inches of the terminal, separate power leads for both, separate fuses on positive. Loom them together with split loom so it looks like one wire. Nice thing is the load isn't so bad so you can get away with a 10GA wire on each amp.

Nothing fancy for the fuses, simple 10GA ATO waterproof fuse holders found on amazon.

For 2 amps and a power antenna, I'd put a 5 prong relay on the amp turn on myself, but part from the yellow straight to battery, should work fine.

[McLovin]

You agree my diagram in Post 5 is a correct way?