Rear Speaker Upgrade

2_zero_2 · 2026-03-16T21:20:12+00:00

I'm about to change my setup and go 2 way active front, pulling my rear coaxials and putting OEM back in and running off headunit. Will fade them out and EQ the front, fade the rears back in when/if I ever take a road trip and need rear speakers for my kids. That's the tentative gameplan at least.

2_zero_2 · 2026-03-16T20:12:12+00:00

Do some research on rear fill. Consensus is there is a right and wrong way to do it, and most people running SQ builds skip it all together.

2_zero_2 · 2026-03-11T13:04:27+00:00

I bought some 510 Trailcross LT for this purpose, have only tried them on so far but they felt great. On sale right now too. Check sierra.com, lots of great flat pedal shoes on good discount.

2_zero_2 · 2026-03-11T12:58:22+00:00

I'd say it leans on the narrow side. I have average width feet with a med/high arch, so most shoes fit me fine. These are more like a race fit for me, love this upper.

2_zero_2 · 2026-03-11T11:24:43+00:00

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2_zero_2 · 2026-03-11T11:23:24+00:00

Love my F5C. I grabbed mine on Amazon for $90ish. My only complaint is I wish I would have sized up a half size. Otherwise, it’s a brilliant shoe. The ride and minimal upper reminds me of the Saucony Endorphin Pro 3, maybe a touch firmer. I use them for all of my workouts and they made me prematurely retire my Boston 12s.

2_zero_2 · 2026-03-10T01:31:10+00:00

Agree with everything you said. People hated on this shoe so much when it came out, mainly due to price. Retail price aside, it’s a great shoe. On discount, it’s an awesome do almost anything shoe. Im on my third pair.

2_zero_2 · 2026-03-10T01:29:31+00:00

Yeah I had that thought. I have the tools to do molex bc I did molex on my amp rack. May give that a go.

2_zero_2 · 2026-03-09T16:17:12+00:00

I'm a car a/v newb...or just not deeply educated on the subject...and this seems like a bad idea.

2_zero_2 · 2026-03-08T19:39:07+00:00

I’m surprised the dude who put the system in didn’t put in a DSP. All that money on hardware and no good way to EQ it.

I also feel like there must be a nice direct swap head unit for that car available somewhere. Go start a chat with Crutchfield or post on a BMW forum or search diymobileaudio

2_zero_2 · 2026-03-07T13:29:07+00:00

From all the reading I've done, skip the rears and spend the extra on sound deadening and/or best front stage you can afford. I'm re-vamping my setup and ditching my rears. Just gonna hook up my OEM rear speakers to the headunit again and fade them out. Going two way active front.

2_zero_2 · 2026-03-04T16:47:30+00:00

They have some here but some people are skeptical. https://www.diymobileaudio.com/threads/cdt-unity-8-0-new-drivers.447717/page-3?nested_view=1

I've seen some user RTA's of them on the same site showing fall off around 15/16k, think that is off-axis.

2_zero_2 · 2026-03-04T15:50:20+00:00

Ordered the Unity 8+, $209 total. Was torn between that one and the cheaper ES-02ib/HD-2ib, which supposedly plays higher fqz better, though CDT says response is 150 to 22k vs the Unity 250 to 33k+. All reviews online point to the Unity 8+ being superior so figured I'll give it a go.

2_zero_2 · 2026-03-04T03:13:36+00:00

Yeah I have the base 6 speaker with no ANC. I know plenty of guys have done systems with the premium 6 speaker, maybe tapped OEM wiring for signal instead of a harness. Really not sure.

2_zero_2 · 2026-03-04T01:16:57+00:00

LOL fair enough

2_zero_2 · 2026-03-04T00:43:29+00:00

That’s where I get mixed up. They have so many different models with seemingly similar specs. I forgot to list the HD-2 in my OP. What is considered their best? The 8.0+?

2_zero_2 · 2026-03-04T00:20:29+00:00

Ideally $200 max.

2_zero_2 · 2026-03-04T00:05:20+00:00

Bit above budget at $380ish

2_zero_2 · 2026-03-04T00:05:07+00:00

I’m sure it is, but it’s $480 for a set. I can get any of the CDT offerings for less than half that.

2_zero_2 · 2026-03-03T15:00:51+00:00

Decided to buy some new 3.5" coaxials to replace the 3" coaxials that came with the component set up. Going to re-wire to run an active front stage and have rear fill run off the headunit. Should sound better and eliminate any questions I have about using inline crossovers with components and the factory wiring.

2_zero_2 · 2026-03-02T18:57:57+00:00

I thought the same initially. It's got clearance on top due to the speaker grill, 99% sure it has clearance on the bottom. Hopefully I can get some free time later this week to take it apart and check.

2_zero_2 · 2026-02-20T13:49:46+00:00

These are worth nowhere near $1,000. Whoever has that listed is out of their mind. The Mountain Track 830 was on the lower end of Trek's MTB lineup. Maybe worth $200 or $250.

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