I have been running this box with 2 kicker comp 4 ohms and a kicker cxa 400.1 for almost 3 years now. The construction is great and sound is good too BUT... I constantly messed with the amp adjustments trying to get the best sound. I could get it to sound really good but to get the volume I wanted would give me alot of resonate bass but to get out some of the resonance I lost punch and volume. I contemplated different speakers and or poly fill but decided It sounded good enough.
Then 2 days ago I cruised though this site again and read some reviews and read Ross M. review. He and or she was spot on and I always noticed when I rolled all my windows down my system sounded so much better so I figured they were on to something. I put in a passive radiator I order today 9/24/25 and damn that made all the difference.. I have always gone after market on all my vehicles and this system sounds perfect for me now.... punch increased the lows are pronounced and the resonance is gone.
Take there and my advice... this box is great and worth it but if your in a santa cruz get one sub and a passive radiator and its great!! I can tell you the volume and clarity as well as definition and punch are leaps and bounds above when I had 2 subs running.
What you had a was a case of the worng subs, and not enough power. The kicker comp 10's call for a larger enclosure and lot more power than 400w. When you switched to a single sub and passive radiator you were now putting more power to that single sub, and the passive radiator made it 3db more efficient.
The recommended set up for this sub box is a pair of Sundown LCS 500w 10s and a Sundown 1250d which is a 1400w rms amp. Power is king!
The box looks and fits great under the seat ! The sound and bass is more then expected when ordering ! The finish of the box is very nice ! Would definitely suggest buying this product !
Great Fit for a 2025 Santa Cruz
Paired up wonderfully with some Memphis Speakers.
Sounds amazing
Added a little custom LEDs
Very well made box with high end MDF. Cutout size was accurate at 9.15 needed to be trimmed with a jigsaw and some sandpaper. This is very common as cutout diameters vary. Bedliner coating high end as well. Perfectly sealed which can be an issue with cheaper boxes. Fit under seat was perfectly hidden. I would highly highly suggest using a single 10 inch sub and a passive radiator,
I got mine from partsexpress $110 Dayton 10 inch passive radiator. I started with two Sundown SD-4’s which are phenomenal with added polyfil in box to help a tad bit with the low end. The subs each getting .5 cubes is okay but the low end suffers especially in the Santa Cruz which is a low end bass trap….roll your windows down and you gain about 6 decibels especially around 30-35 hz. The passive radiator fills in that lower end that sealed boxes can’t do in the Santa Cruz, put the foxbox with dual Sundown SD4’s in my Sequoia and no issues it has to do with cabin size etc. The passive radiator acts like a port and exaggerates the low end filling that gap. It gets just as loud as two subs but cheaper and less amp power. The other option which I built is a ported box dual 8’s tuned to 32hz. I have a Fosgste Power t-400 bridged class a/b giving the sub around 500-600 watts. It sounds phenomenal and I experiment relentlessly with amps and subs and boxes. Get this a box it’s great and get a passive radiator you can tune it by adding heavy washers that come with it. More washers and weight lowers the tuning…I have 3 of the 6 I think tuned around 30hz. Too many washers it missed the punch and to few missed the low end. Great box Fox!
Would someone from Fox plz contact me before I speak poorly of my sub box. Thank you.
Our phone number and hours of operation are listed on our website. Give us a call.
Update: It's been 3 weeks and still no call from you. Do you have a question?
