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frsbaum · 11-27-2013, 08:25 AM

Hey pseudo, I actually just did my install this past weekend with the Alpine 6.5s and the SPS-410. It was a lot of work, but same amount of effort that doing any speaker swap would be. Here is what I learned.

1. The 6.5s fit no problem in the door. I made a new bracket out of MDF and put down dynamat between the metal body and the MDF bracket. Use the Alpine bracket as a template. I used the Metra adapter for the doors as the OEMs connect from the top/outside and the Alpines connect from the backside (inside the door). Just route the Metra extension through the hole that the OEM harness comes out of (I think I routed between the window slide rail and the inner door panel. Check you don't get interference with the power window before you put the door panel back on). I cut out that super cheap plastic weather "liner" and covered the holes with more Dynamat.

2. I put the 410s in the back. They won't fit in the factory brackets without some serious modification, so I again made a new bracket out of MDF (add a second layer for thickness to the top bolt holes for proper offset). I re-used the OEM wire couplers after cutting them off the speakers and soldered to the new wiring for the speakers. Slot the holes in the bracket so that you can line it up with the speaker grill. Remember to buy longer screws and washers ($2). Add Dynamat again to whatever you see. I drove the car to work one day without the rear speakers installed and there was a noticeable "something missing" feeling.

3. The 410s DO NOT fit in the front. There isn't enough depth before you hit the HVAC vents. The Tweeters from the the SPR will pop right in to the OEM grill (put some foam or felt around the edge still like you would any speaker). Since I removed the front 3.5s, I used the glue strips to attached the Crossovers onto the HVAC vents. For wiring, I cut off the OEM coupler and just soldered in the new connections to go to the Crossover. You can trim the extra wire first and when you are done wrap the wiring in felt or cushion tape to prevent rattles.

Everything sounds way better than the stock. I can hear an actual sound stage now and the music isn't muddled. I have the Alpine in-line amp ready to go, thinking I will hang (using dense foam and zip ties) from the IP hanger beam behind the radio OR screw it into the glove box (will fit still with the OM). Then of course bypass the factory amp in the trunk and remove for 1 lb of weight down. I already have the Alpine CDE-HD149BT installed. I'll do some tuning and possibly more sound deadening when I get the amp installed.

11-27-2013, 08:25 AM	#16
frsbaum Junior Member Join Date: Nov 2013 Drives: 13 FR-S Asphalt Location: USA Posts: 4 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hey pseudo, I actually just did my install this past weekend with the Alpine 6.5s and the SPS-410. It was a lot of work, but same amount of effort that doing any speaker swap would be. Here is what I learned. 1. The 6.5s fit no problem in the door. I made a new bracket out of MDF and put down dynamat between the metal body and the MDF bracket. Use the Alpine bracket as a template. I used the Metra adapter for the doors as the OEMs connect from the top/outside and the Alpines connect from the backside (inside the door). Just route the Metra extension through the hole that the OEM harness comes out of (I think I routed between the window slide rail and the inner door panel. Check you don't get interference with the power window before you put the door panel back on). I cut out that super cheap plastic weather "liner" and covered the holes with more Dynamat. 2. I put the 410s in the back. They won't fit in the factory brackets without some serious modification, so I again made a new bracket out of MDF (add a second layer for thickness to the top bolt holes for proper offset). I re-used the OEM wire couplers after cutting them off the speakers and soldered to the new wiring for the speakers. Slot the holes in the bracket so that you can line it up with the speaker grill. Remember to buy longer screws and washers ($2). Add Dynamat again to whatever you see. I drove the car to work one day without the rear speakers installed and there was a noticeable "something missing" feeling. 3. The 410s DO NOT fit in the front. There isn't enough depth before you hit the HVAC vents. The Tweeters from the the SPR will pop right in to the OEM grill (put some foam or felt around the edge still like you would any speaker). Since I removed the front 3.5s, I used the glue strips to attached the Crossovers onto the HVAC vents. For wiring, I cut off the OEM coupler and just soldered in the new connections to go to the Crossover. You can trim the extra wire first and when you are done wrap the wiring in felt or cushion tape to prevent rattles. Everything sounds way better than the stock. I can hear an actual sound stage now and the music isn't muddled. I have the Alpine in-line amp ready to go, thinking I will hang (using dense foam and zip ties) from the IP hanger beam behind the radio OR screw it into the glove box (will fit still with the OM). Then of course bypass the factory amp in the trunk and remove for 1 lb of weight down. I already have the Alpine CDE-HD149BT installed. I'll do some tuning and possibly more sound deadening when I get the amp installed.