[SabaEV]

I recently installed a custom 8 inch fiberglass woofer taking up the bottom area where the oem stock sub did. It is a Dayton audio HO series 8 inch woofer with a 375w rms amp (skar audio 1200 something) and makes more than enough bass. That plus some eq touchups I did on the midrange really make the sound quite good (coming from an audio systems engineer background). Anyone interested in details message me.

 

[SabaEV]

This is pretty awesome! Any chance you have a diy step by step? How much rewiring did you have to do?

I didn't do the actual install (had a local shop do it) but I can overview the steps.

Step 1. Buy an amp, driver, hi/lo converter, RCA cable, enough 4 gauge wire to power the amp, Materials for the box (fiberglass or wood/mdf), mounting screws + tnuts for driver
Step 2. Remove stock wired amp by cutting the input wires (leave as much cable length to route into Hi/Lo converter that you can (i.e. cut near the wires go into the stocksub enclosure)).
Step 3. Grind down tabs if desired to open up maximum space in well area (helps clean up the accessible volume)
Step 4. make a mold of the bottom section or make a wood box approximating the shape, use all the available width you can to maximize air volume (ideally >0.7 cu ft usable)
Step 5. Mount baffle (the part you see) to the fiberglass shell
Step 6. T-nuts + driver mount -> wire to amp
Step 7. Adjust amp settings and pre-amp settings as desired to ensure plenty of signal coming from the converter.
Step 8. Install remote amp control in front of car so you can turn the bass up/down from the driver position (comes with the amp I linked)
Step 9. Ensure the amp/preamp are wired to trigger on with the car so you don't kill your battery
Step 10. Mount driver (connect driver wire to driver terminals)
Step 11. Secure down amp so that it doesn't slide

I think that is it? I could be missing something

Woofer
Home

Hi/Lo converter
https://www.amazon.com/AudioControl...erter-AccuBASS-Subwoofer/dp/B00IIL0LW0/ref=dp_prsubs_1?pd_rd_i=B00IIL0LW0&psc=1

Amp
https://www.amazon.com/gp/product/B07F1FXPH1/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

 

[SabaEV]

If I was in charge of tuning it and had proper tools to dial in the limiting I could make it much better than it is but there is a serious limit in spl due to the underwhelming woofer and likely underwhelming power. From what I see it appears to be a dual voice coil woofer based on the 4 wires they are using 2x normal woofer amps to drive the sub so probably 40w realistically based on it being a 5 inch...

 

[SabaEV]

For reference the stock sub is a 5 inch driver ported box probably 6-8 L internal volume so it makes sense why they limited it so much, albeit disappointing. With a surround roll this small the woofer can move a max 4-6mm one way, that's similar to a door panel woofer (likely is) just in a box...

 

[SabaEV]

Make sense. Definitely a long project for someone like me. I'll have to do some research and maybe get some quotes.

Do you feel like the change in the woofer was all the system needed to make it as good as we would have expected?

It did about 80% of the improvement. Honestly it covers up the mid/HF sins ok because it can fill in that bottom end of the vocal that is so lacking on the stock system. Still spitty without the EQ I posted to another thread but much better. Can't recommend a sub enough. From what I can tell that location is excellent as far as integration with the system (from the driver position) and doesn't have any noticeable rattles.

 

[SabaEV]

Note I provided everything but the wiring kit (amp, preamp and driver). Mascari Enterprises DBA Soundsations is where I got it done (Santa Clarita, 1 hour north of Los Angeles California)

 

[SabaEV]

What was the 7khz settings for poweramp that you used?

Looks like I removed the 7k filter but it was -1.6 dB q4.

 

[SabaEV]

Good info, thanks for directing me here! Do you know if they used the OEM sub wires to drive the new amp, or did they tap off different speaker lines instead to bypass whatever stock equalization the sub has?

Also I'd love more info about the EQ you're talking about, I'll have to go hunting for that now.

I'm using the oem sub wires routed through a step down so yes I'm sure there is some eq (stock eq still applied) I need to re eq it to clean up that filtering but honestly it sounds fine without updating it besides the 36 hz filter was changed to 28 Hz and gain reduced to 1.5 dB.

 

[SabaEV]

Looks great! How much was it to have the custom fiberglass box built?

Roughly 1000 for the box and install.

 

[SabaEV]

Good info, thanks for directing me here! Do you know if they used the OEM sub wires to drive the new amp, or did they tap off different speaker lines instead to bypass whatever stock equalization the sub has?

Also I'd love more info about the EQ you're talking about, I'll have to go hunting for that now.

Suggested setting tweaks?

Just wondering if anyone has made useful adjustments to the EV6 settings that would be worth sharing? Two things that immediately spring to mind are adjustments to the Meridian sound system spectrum that have improved the sound quality (would be interested to know if there is a consensus); and...

www.kiaevforums.com

I added a 7 khz cut and adjusted the 36 Hz boost as mentioned but this is essentially it.

 

[SabaEV]

Looks a great job, you may want to speak to the company who did SabaEV install and see if they can do the same in a kit form as there would be a massive market for this I am sure.

Shame its in the USA as I am sure many in the UK would be interested also.

Potential issues with a kit form (likely the enclosure shell could be replicated) is they chose to cut off the tabs to make clearance which wouldn't be easy for the average Joe... Likely shipping the enclosure parts wouldn't be too much but you would need an experienced person to wire it up.