Hama Car Antenna for DAB/DAB +, AM/FM Flexible Car Roof Antenna for Digital Radio Reception, Band III L Band SMB (F) Connector, electronically amplified, Active, 12 V Car Antenna – Black

Replaced the factory active aerial on my Mk3 (NC) MX-5 with one of these when I was upgrading the stereo for a DAB/CarPlay/Android Auto unit from Pioneer (SPH-DA77DAB). It fits well with no modifications required to the car.There's 3 wires, 1 for each of the radio signals (FM and DAB) and then a red power lead. I wired the red power lead to the "remote signal" blue/white wire of the stereo wiring harness. This ensures the aerial gets the power it needs. It immediately found more DAB stations than I'd ever seen before.This is way better than those stick on windscreen aerials but you get what you pay for.

Bought this to replace a DAB window antenna and standard roof mounted radio antenna. I had to use a conical hole cutter in my drill to achieve the larger diameter hole for this aerial - but that wasn't a problem, my old roof mount had dropped to bits anyway so once I had access to the underside, I simply chopped the old aerial cables, cut a larger hole, checked the new aerial fitted then used the old cables to pull the new ones through the roof lining, down the window pillar and through inside the dash - that last bit proved impossible so the cable now runs between the screen and dash in a, convenient, recess. A pity there's about 12" of cable showing but it's that or pull the whole dash out!Upon completion, turning the ignition on to test the reception, the radio scanned frequencies and hit on xmas radio - xmas hits 24/7 between November and December - I didn't get that one before. Other scanned stations included "gaydio" - and they played some really great tunes, all the great disco hits - taking me back to my late teens when I used to frequent local discos...ahh, great memories.It actually hit on quite a few 'new' radio stations which my window mounted aerial didn't 'see' - but I always expected a far better reception with an amplified roof mount.

... the installation instructions are rubbish! The antenna comes with three down leads pre-installed: one each for the DAB signal, FM signal and power supply. These are of adequate length to reach the dash from either front or rear roof positions. The base of the antenna mount has a 20mm square cross section and exactly matched the hole in the roof of my car (Citroen / Peugeot) made for the antenna it was replacing. There is also a rubber adapter to allow it to be fitted to a round hole. The securing nut has a washer with spikes to make a good earth connection and a rubber 'O' ring to seal the underside. None of this is explained in the instructions which do little more than identify the down leads.

Superb reception - top-class aerial!More involved fitting than a stick-on or mag-mount, but worth the effort. In reply to the confusion regarding hole size in other reviews (instructions not very comprehensive), I hope my experience may help:1) loosen headlining above rear of roof and down one side (above the doors) to allow access behind;2) measure inside and outside to fit (typically an inch or so forward of the rear/hatchback interior light);3) drill a 19mm hole and fit the topmost rubber washer (the one with the square hole in the middle) into the hole with a bit of silicone sealant;4) pass the cables through the hole and thread the rubber O-ring and the nut onto them. Push the aerial into the square-holed washer, then fit the O-ring and nut to the inside of the roof & tighten;5) thread the cables behind the headlining and down the front (windscreen) pillar, then behind the dash, to the radio. Easier if you tape the 3 wires together every 6" or so;6) connect the 2 aerial cables to the radio and the red wire to a switched positive (e.g. the auto-antenna wire from the radio, or splice it into the switched positive which connects to the radio).Disclaimer: I have no idea what I am doing, so under no circumstances should you follow my advice!

I got this to replace the stick on type after having a new windscreen fitted and the old one not sticking back on properly. With the old one the signal was patchy in places but i put it down to the areas i was driving....turns out i was wrong. This gets amazingly better performance than the old, far more channels and no dead spots yet. Its great!I have not even got around to connecting up the 12v, so its only running on DAB and AM/FM aerial - yet its still FAR better than the previous stick on type.Easily fitted to my pioneer head unit on my Ford Transit connect.It is plug and play BUT on my connect i had to increase the aerial hole size from 10mm to 20mm - Yes 20mm is needed so that the full body of the aerial housing sits tightly on the body work. (dont be put off by having to drill a bigger hole, just use a Step Drill that goes to at least 20mm (around £15)).