"the alpine 1" dash component review"

JBL Sub Wiring

Getting into the speaker replacement here. There are 4 wires going into the Sub. It's a Dual Voice Coil Sub I get that.. But I'm adding an OEM integration processor, So of the 4 wires coming from the amp, what can I send to the processor? Just one + and - or both +'s?
 
Getting into the speaker replacement here. There are 4 wires going into the Sub. It's a Dual Voice Coil Sub I get that.. But I'm adding an OEM integration processor, So of the 4 wires coming from the amp, what can I send to the processor? Just one + and - or both +'s?

Hi wolftg, (sorry for the delayed reply; I just saw this!)

I'm not quite sure if I'm visualizing your stock (JBL?) subwoofer set-up correctly; pictures would be an immense clarification tool. With a dual voice-coil driver they still 'usually' only need two wires (POS and NEG) to feed the sub using jumpers; In a parallel wiring configuration your positive lead from the amp's output connects to both (+) V.C. terminals, and the negative lead from the amp connects to both (-) V.C. terminals.

And in a Series wiring configuration, your positive lead from the amp connects to the positive term of one V.C. (V.C.1), and the negative lead connects to the negative term on the other V.C. (V.C.2) and then a jumper is connected between to the two Un-used positive and negative terminals on the sub's terminal block to complete the circuit. That's why I began by saying "Pictures would be an immense help with clarity!" Anyway...

the DSP (Processor) would be connected upstream, between the headunit and the amplifier; not after the amp or you'd be hitting the processor's input (opt-amp) stage with that high output signal designed to drive the subwoofer ONLY! If I'm wrong about your particular wiring set-up, please post a few photos so that we can see just how the system is wired; I really don't enjoy guessing, Rgds!
 
Hey Team,

There are quite a few new members on our forum doing audio work in their 4Runners... thought this thread may be helpful to them! 'Best',

rig
 
Hey Team,

There are quite a few new members on our forum doing audio work in their 4Runners... thought this thread may be helpful to them! 'Best',

rig

I was inspired by your posts. Thanks!

I have been very unhappy with the sound quality of the stereo in 4ruuner since the debut of the 5th gen, especially from the ears of a more than 30 years audiophile. So I have not even bothered to turn it on most of the times. Not any more!

I do not like the kicker tweeter, my theory is that how good can it be for a Subaru upgrade.
I do not like the idea of replacing the oem tweeter with the co-axial, does not make sense.
I like your idea but go one step further. I replace the oem tweeters with Alpine type-R spr-10tw tweeters for the following reasons
1. type-R is supposed to be better than type-S
2. higher power rating
3. better cross-over
4. adjustable gain, 0, 2, 4 and 6 dB.

The results are phenomenal in the following aspects
1. the treble is crystal clear, airy but not harsh due the the silk dome
2. the mid is liquid and transparent, the oem 6x9 and the head unit are not that bad, it was plagued by the poor oem cross-over and garbage dash speakers.
3. the bass is punchy and layered with much better resolution, not muddy any more.
4. the overall performance is on par with or even better than the Mark Levinson unit in the Lexus

very happy with the upgrade, thanks again!
 
Last edited:
"...I was inspired by your posts. Thanks!...

I like your idea but go one step further. I replace the oem tweeters with Alpine type-R spr-10tw tweeters for the following reasons
1. type-R is supposed to be better than type-S
2. higher power rating
3. better cross-over
4. adjustable gain, 0, 2, 4 and 6 dB.

The results are phenomenal...

very happy with the upgrade, thanks again!"

Hi jsun,

I'm so glad that you found a driver brand that you're satisfied with; and thanks for your post! The Alpine SPS-110TW works great for my needs as well. Because I have no plans to go "aftermarket" with the HU being only 20W RMS, I was able to use the "S series" for the dash!

The SPS-110TW's are rated at 100W true RMS and have a wide frequency range (IIRC) of, 1500 to 18,000 hz (3.5 octave range) and the X-over of 12 dB's per octave slope! And like you said, they never sound harsh or brassy at any time! Thanks for you comments, 'Best to you',

rig
 
Just installed these today in my 2015 Limited with JBL. Really nice sound, thanks for al the research and time spent on this thread!




2015 T4R Limited 4WD Mag Grey w/ Redwood Interior
 

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