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'17 Base Sedan 5mt
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If you don't have an upgraded system with an AMP and don't plan on adding one I wouldn't get too carried away, 25w RMS would probably be fine.

You'll want 6x9s for the front and 6.5s for the back, good idea to stick to the same brand and series for both sets so it stays balanced. Highest efficiency you can get is key if you plan on powering them from the stock headunit.

Pretty much anything will be be better than the stock speakers really. They have tiny magnets and a thin plastic frame, and although paper cones can produce good sound if made right, they won't hold up to moisture well if they see it regularly. The base fronts are also undersized for what can actually fit. Even the upgraded speakers arn't great, though they are better than base speakers.

Personally had some old discontinued 3-way Pioneer 6x9s laying around from a previous car and just found some cheap matching 6.5s on ebay. They can handle 100w RMS but I plan on adding an amp in the future.

You will want to copy a couple of the things the stock speakers actually did well, such as sealing the speakers to the doors with foam gasket tape, and foam coupling to the door panel. If you don't plan on doing a full sound treatment which will also help cut down road noise, some simple foam matting behind the speakers is also a very good idea to cut down on reflection interference and distortion.

If you want to avoid cutting wires, drilling holes, and avoiding any clearance issues with the window you will also want to order some adapters, Metra makes the 82-8146 and 82-8148 that will fit the stock holes, though the adapter for the front driver side door will need to be trimmed slightly to clear the bolts for a flush fit, all 3 others fit perfectly. You will also want to get two sets of Metra 72-8104 harness adapters to avoid hacking up the stock wiring, if your speakers have spade connectors they are plug and play.

If you do want to add an AMP you will also want the Metra female 70-1761 and male 71-1761 10+6 harness adapters to avoid hacking up the factory wiring behind the headunit

You can order the Rockford Fostgate upgrade with AMP, wiring harness, and front speakers for an OEM upgrade, but like I said even the upgraded speakers arn't great, plus it still leave the rear stock speakers, and you can make a much better system for the money if you don't mind dealing with a bit of wiring.
 

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ModFather
2019 Subaru Impreza Sport 5 Dr. Manual Shift
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I recently replaced the head unit and added a back up camera to the wife's Outback. I used Crutchfield for everything. I've use them many times in the past and I have to say they are pretty helpful. I've been thinking about upgrading my speakers too, but I mostly listen to podcasts lately :)
 

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Discussion Starter · #4 ·
I recently replaced the head unit and added a back up camera to the wife's Outback. I used Crutchfield for everything. I've use them many times in the past and I have to say they are pretty helpful. I've been thinking about upgrading my speakers too, but I mostly listen to podcasts lately :)
I’ll have to look into Crutchfield, I’ve heard a lot about them.
 

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Discussion Starter · #5 ·
If you don't have an upgraded system with an AMP and don't plan on adding one I wouldn't get too carried away, 25w RMS would probably be fine.

You'll want 6x9s for the front and 6.5s for the back, good idea to stick to the same brand and series for both sets so it stays balanced. Highest efficiency you can get is key if you plan on powering them from the stock headunit.

Pretty much anything will be be better than the stock speakers really. They have tiny magnets and a thin plastic frame, and although paper cones can produce good sound if made right, they won't hold up to moisture well if they see it regularly. The base fronts are also undersized for what can actually fit. Even the upgraded speakers arn't great, though they are better than base speakers.

Personally had some old discontinued 3-way Pioneer 6x9s laying around from a previous car and just found some cheap matching 6.5s on ebay. They can handle 100w RMS but I plan on adding an amp in the future.

You will want to copy a couple of the things the stock speakers actually did well, such as sealing the speakers to the doors with foam gasket tape, and foam coupling to the door panel. If you don't plan on doing a full sound treatment which will also help cut down road noise, some simple foam matting behind the speakers is also a very good idea to cut down on reflection interference and distortion.

If you want to avoid cutting wires, drilling holes, and avoiding any clearance issues with the window you will also want to order some adapters, Metra makes the 82-8146 and 82-8148 that will fit the stock holes, though the adapter for the front driver side door will need to be trimmed slightly to clear the bolts for a flush fit, all 3 others fit perfectly. You will also want to get two sets of Metra 72-8104 harness adapters to avoid hacking up the stock wiring, if your speakers have spade connectors they are plug and play.

If you do want to add an AMP you will also want the Metra female 70-1761 and male 71-1761 10+6 harness adapters to avoid hacking up the factory wiring behind the headunit

You can order the Rockford Fostgate upgrade with AMP, wiring harness, and front speakers for an OEM upgrade, but like I said even the upgraded speakers arn't great, plus it still leave the rear stock speakers, and you can make a much better system for the money if you don't mind dealing with a bit of wiring.
thank you for the response! 🙏🏽
 

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Looking to replace my stock speakers with better ones. What would y'all recommend? :)
Hi, better late than never I guess...
Here's my take on the impreza shitty sound system:

I went for Rockford Fosgate Prime serie (6X9 front, 6.5 rear). I kept my stock tweeters.
To drive all of that better than from the HU alone, I added a compact amp 4X45W RMS (Alpine 445U) and used the 15A available from the original radio circuit (I could have used the 20A from the OEM Audio Upgrade harness preinstalled in the car but didn't out of laziness... instructions are available on the web for H630SFL001 showing the blue 2 connectors attached to the 6+10 pins connectors for speakers signals).

Since I already had a pioneer amp laying around and a 10 inch sub, I'll add that to the mix eventually.

Parts needed for the project:
Doors speakers:
RF R169X2 + Metra 82-8146 + Metra 72-8104 (110$ CAN, crutchfield)
RF R165X3 + Metra 82-8148 + Metra 72-8104 (100$ CAN, crutchfield)

Wiring and amp (in order from the back of the radio):
Metra 71-1761 (11$ CAN, local store)
20 feets of gained 9 wires, only needed 12 (20$ CAN, amazon)
Alpine 445u (270$ CAN, crutchfield)
Metra 70-1761 (6$ CAN, local store)

I read very instructive posts form Cdicorpo and Robzz that made me understand what I was about to do but I'm no expert. Changing the speakers alone made no significant change to the sound quality. When I finally installed the alpine amp under my passenger seat (to retain gain controls, low pass filter access and speaker signal on hand), boy did it change the game. There is a little white noise comming from the HU but aside from that, clearer sound and more powerful.

Side notes:
-There is a module not present in CDICORPO post on top of my radio that needed to be removed to have access to the wire harness.
- Attached is a picture of the ground location for the alpine amp under the passenger seat, the HU side of my T-Harness (solder/heat shrink) and the comparison of the speakers.
 

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@FrancisQC
I know its been a few months since you posted this, which is great information, but where did you run the 9 conductor wires from the back of the head unit to under the passenger seat, and how are the mids-lows after amplifying the system with the stock head unit?
 

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@FrancisQC
I know its been a few months since you posted this, which is great information, but where did you run the 9 conductor wires from the back of the head unit to under the passenger seat, and how are the mids-lows after amplifying the system with the stock head unit?
Hi,
I ran the wires according to the H630SFL001 instructions found online (look out this post: Rockford Fosgate Audio Upgrade ) . You need to remove the glove box and remove some trims, but nothing very complicated.

Regarding sound quality, I really enjoy the sound as it is.My brother has the Harman Kardon package on his car (2018 Sport-teck) and I prefer my setup. I had a sub laying around and installed it but it was too much. I found it unnecessary. RF 6X9 are really great and sound eq is left at bass 0 to +2. I rather keep my trunk available so I removed the sub.

Remember that the HU is a piece of shit. It is glitchy. Radio can take a few seconds to respond at time. I had a trip where AM/FM had no sound but media played just fine. After stopping the car for a minute, back to normal (HU keeps 12+ for more than 30 secs after car stops). I doubted my installation for a while but later realised that people with stock system had the same problem. A lot of information online regarding the HU...

If you have anymore question, I'll do my best to answer it.
 
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