Done.
Results: Sounds Incredible. Full range of sound. Incredibly clear (compared to stock). Bass guitars sound incredible.
Issues: Heat can build up in the Frunk. - would love to receive ideas on mitigation strategy.
Total Build Cost: around a 1,000 bucks. This doesn't include the SMD tool which I will keep for other audio project now that I am on a path to becoming an audiophile. Nor does it include various test speakers purchases which I will redeploy on other projects or just sell off.
Final Config:
Kept the stock Front Tweeters
- I installed 600Hz bass blockers to clean up the sound. -
Crutchfield Bass Blockers
Kept the stock Front Mids
- Installed 2 (1 per speaker)
Rockford-Fosgate-PM100X1 and used these setting:
- Set the pass filter 100Hz (available settings are 60,80,100Hz)
- Set the ohms to 4 (available settings are 2 or 4 ohms). I measured all stock speakers to be around 3.6 ohms.
Changed out the rear speakers to these
Kicker 10PS5250 5-1/4" 2-way motorcycle speakers (2-ohm).
- Speakers are bigger and required modification of the rear mounts. I ordered a set from Ebay from a wrecked 2019 RTL. I did not want to modify our originals. Bonus – they came with additional stock speakers so I guess I have spares.
- These speaker are controlled by an amp in the frunk.
Amp for rear speakers -
Rockford Fosgate PM300X2
- Converted rear speaker outs to rca and ran wires from back of bike to front.
- In the same fabric-taped homemade harness, I ran the speaker outs from the amp to the rear speakers.
- I tapped into the power wire of the USB port in the rear trunk for remote power wire for the amp. When the ignition is on, the USB charger has power. I use this wire to tell the amp to turn on since it is directly connected to the battery.
Amp-powered subwoofer added to the Frunk -
Sound Ordnance B-8PTD
- Midway through the fabric-taped wire harness, I split off from the remote amp wire to a switch in the middle of the rocker switch panel. I inserted back into wire harness headed to the front. This wire controls the amp on the subwoofer. Now I can turn it on or off at will, but on only when ignition is on.
- I also added a remote dial in the center storage compartment and injected that wire into the harness going to the frunk.
NOTES
- The big amp on the rear speakers is tuned way down. It is probably pushing 50 Watt RMS max to each of the 2 rear speakers – even though the amp is rated for 150 watts per channel. The overkill on the amp is to get the expanded tunning controls that don’t come on a smaller amp.
- The stock speaker-outs from the radio are so low that both the big amp to the rear speakers and the powered subwoofer required the connection be wired to the rca low-level inputs instead of the high-level inputs. This should tell you something.
- I used a D'Amore SMD DD-1+ to determine where distortion starts in the radio. Conveniently, you can set the volume on the radio at 12 o’clock on the main volume screen/home volume screen. I don’t know what position that is on the sub-menu volume screen but it equates to like 1:30 or 2 or something. My wife is instructed not to go higher.
- Tuning the big amp for the amp built into the subwoofer are both tuned way down. the gain is nominal and the bass boost on both is set to 0. My goal was loud and clear, not loud as hell and shake the bike. The result has exceeded my expectations.
Other parts list:
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https://www.crutchfield.com/p_136XDCLR2S/JL-Audio-XD-CLRAIC2-SW.html
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https://www.crutchfield.com/p_142EXTAPEB/Scosche-EXTAPE.html
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https://www.crutchfield.com/p_142R12/EFX-Marine-RCA-Patch-Cables-12-foot.html
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https://www.crutchfield.com/p_142R15/EFX-Marine-RCA-Patch-Cables-1-5-foot.html?tp=1694
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https://www.crutchfield.com/p_142PA8BX/EFX-PA8BX-Wiring-Kit.html
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https://www.crutchfield.com/p_007CK10/Crutchfield-CK10.html
I'll gather up some pictures and create a fresh post with this content at a later date. Cheers!