Help me decide how to upgrade my 6 speaker 8.4A system - Page 10 - 2014+ Jeep Cherokee Forums
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post #91 of 99 (permalink) Old 02-10-2015, 09:47 PM Thread Starter
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Ah, good, with a low Qts like that and the Fs of 53 Hz it will be a shallow roll-off for those 6x9 subs which will play in very nicely with the cabin gain I was talking about before. The bass that you hear, feel, and measure will be far lower than 85 Hz. Let me know how it sounds, and definitely take another sweep with the Omnimic when those come in!

The minidsps are really flexible and used a lot in DIY home theater. That would also work

2014 TH born on 2/2014: 3.2L, C&C, Leather, 8.4A w/ Nav, Lifetime Powertrain
RRO Super Sliders, 245/70 General Grabber AT2
Alpine/JL 6-Speaker Solution | 3.2L Oil Filter Comparison
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post #92 of 99 (permalink) Old 02-10-2015, 09:52 PM
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Great, good to know. It's a very shallow roll off. The graph shows just that.

I should get them by the beginning of next week. I'll update then.

Back to swooning over the minidsp.
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post #93 of 99 (permalink) Old 03-02-2015, 01:37 AM
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Definitely going to take some cutting.
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post #94 of 99 (permalink) Old 03-03-2015, 12:46 AM Thread Starter
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****, ya those have some heft! That's a CDT CL-69, right?

2014 TH born on 2/2014: 3.2L, C&C, Leather, 8.4A w/ Nav, Lifetime Powertrain
RRO Super Sliders, 245/70 General Grabber AT2
Alpine/JL 6-Speaker Solution | 3.2L Oil Filter Comparison
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post #95 of 99 (permalink) Old 03-03-2015, 12:27 PM
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CL-69SUB CF

I think there are different versions of it with and without the phase plug.

There's an outside chance I can use a 3/4"spacer. I checked briefly when they got here and it looks like it might work and still clear the door card. If not, I'm not against chopping off the brace.

In the meantime, I just took delivery of two MiniDSP 2x4. Could not help myself! I'm going to play with them inside first, then I'll decide if want to try them in the car.
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Last edited by tulse; 03-03-2015 at 12:29 PM.
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post #96 of 99 (permalink) Old 11-28-2016, 03:38 PM
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adapter needed for amp to headunit?

I am trying to figure out what sort of adapter I need to connect my 5 channel amp to the stock head unit (6.4)- Did you custom wire it or is there an adapter that works? (provides RCAs)
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post #97 of 99 (permalink) Old 12-06-2016, 01:19 PM
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Quote:
Originally Posted by Malice101 View Post
@Wolfz23 1000x better is in the ear of the beholder. At one point or another you are just throwing good money after bad in search of the elusive "sound stage" and proper "imaging". It's all good fun but in the end it's a project never finished and a bank account drained. That's just my own burned out opinion of course. I'm happy to listen to the engine in my car these days and just tool along the highway on occasion.
I have a similar amp, the Clarion XC1300 (I think that's the model #). It was beyond a night and day difference in both how loud the speakers can go, power to the speakers and the sound quality. I got the amp new for $180 and had a local shop that I always go to for this kind of thing install it BEHIND the uconnect5 head unit... that's how small it is.

My entire system in my Cherokee is JL for the most part except my front speakers which I will likely change out for a pair of 6x9 JL speakers as well as the tweeters...
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post #98 of 99 (permalink) Old 12-06-2016, 02:14 PM
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Quote:
Originally Posted by rbogdanyi View Post
I am trying to figure out what sort of adapter I need to connect my 5 channel amp to the stock head unit (6.4)- Did you custom wire it or is there an adapter that works? (provides RCAs)
http://www.crutchfield.com/p_161LC7I...k.html?tp=2001
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post #99 of 99 (permalink) Old 04-21-2017, 12:12 AM Thread Starter
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Talking 6-speaker upgrade using the Fusseli method

Here's a summary of what I did for anyone wanting to do the same thing. Note that I have:
  • Uconnect 8.4A (not sure if there are power or filtering differences vs. 6-speaker on other versions)
  • Alpine Type-R SPR-69, I trust the Type-R brand and like the slim fit and low weight of the polymer frame and neo magnet. (For the KL, slim speakers is important.)
  • JL Audio C2-350x, the nicest 3.5" 2-way I could find
  • Speaker adapters to plug directly into the vehicle wiring
  • Cheap sound deadening (i.e. dynamat, I used 3M) added to the doors, and thin foam sealer/gasket for the speaker flanges

GOAL
  • Greatly upgrade sound quality, or clarity and bass, of the stock 6-speaker sound system on a KL
  • Use factory speaker locations for a stealth/stock appearance
  • Implement a 3-way speaker system for the front using a midbass in the doors, and shift the primary sound stage to the dash. Transition (crossover point between the dash and doors) to the midbass no higher than about 200 Hz for best blending.

Option A (I presently run this)
  • Minimal added equipment; no amps, etc.
  • Passive crossovers
  • Modify a 6x9 coaxial to act as simply a 6x9 midbass
  • Convert the dash 3.5" from fill-speakers to the primary front soundstage
  • Natural roll-off of the tiny 3.5" woofer completes the simple crossover to the midbass

1) Rear doors: easy, drop in the new 6x9 of choice
2) Dash
- Wire in the speaker wire harness in opposite polarity for the 3.5". This is counter intuitive, but it will sound better since we are adding an odd-order crossover slope to the woofer in the door. If you don't believe me, try it both ways and decide yourself.
- Drop in the new 3.5" coaxial or full-range speaker of choice
3) Front doors
- Remove/disable the tweeter on the 6x9 if using a coaxial (not needed for a midbass 6" or 6x9 speaker)
- Solder and wire in a series inductor (1.0 mH for the 4 ohm SPR-69) on the 6x9 to achieve a 1st-order lowpass filter at about 200 Hz

This this setup, I like this on the EQ:
Bass +5
Mid +2
Treble -1

Frequency response measurement that I took after installation is shown below. It's good to below 30 Hz, which is amazing without a sub.

Option B (I haven't done this yet)
  • Drop-in new speakers
  • Figure out how to separate the dash and front door speaker wiring, to run the dash/front/rear pairs as 6 channels instead of 4
  • Use a 6-channel, or similar, amp with active crossover slopes
  • Leave the 6x9 speakers intact, with no mods, and use active filters to turn them into midbass and achieve the same as Option A
  • HPF the dash at 200 Hz, and LPF the front (or both) doors at 200 Hz
  • Advantage of this is the option of doing more EQ to flatten and contour the bass response. See how peaky/boomy it is in my measurement without any, this is the nature of an in-car sound environment.
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2014 TH born on 2/2014: 3.2L, C&C, Leather, 8.4A w/ Nav, Lifetime Powertrain
RRO Super Sliders, 245/70 General Grabber AT2
Alpine/JL 6-Speaker Solution | 3.2L Oil Filter Comparison
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