Alero_1986

I am interested in upgrading my audio again this year. My system consists of

Alpine CDA-9886 HU

Alpine MRP-F450
-Infinity Reference 6.5" Components up front
-Infinity Reference 6x9's in the back

Alpine MRP-M650
-2 10" Alpine type S 4 ohm svc in a sealed box
(subs are wired at 2 ohm)

I stuck with the type S subs because I got a really good deal on them at the time. I feel it's time to revamp my box, subs and perhaps amp. I don't want a huge investment but I have some older equipment that i am going to sell to offset some of the cost.

I've been thinking about going Type R. perhaps two tens, or one twelve. I am wondering if I should trade up and look at an MRP-M1000, or if there are any drawbacks to seeking a second MRP-M650 to power the second sub. I know that they are discontinued, but I see classifieds for these all the time

However; There is no pass through on the MRP-M650, and I am wondering if there is any concern as far as balance goes.

I listen to a lot of different music, but have preference to a system that is optimized for metal, and a drummer tuned ear. I would like cleaner punchier bass. I was never able to find the right balance with my current set-up. Any opinions would be great..

Also.. slightly off topic. My CDA-9886 has experienced feedback lately. When I start my car with the e-brake on, the lights and whatnot do not come on and there is no feedback. However, when I release the e-brake and my lights come on there is a low whining noise. I have checked and upgraded all of my grounds. Any idea?

DaVibe

iTrader: (9)

You already mentioned that you were willing to part with the subs. If you keep them and run a second amp, one to each sub, I think you're going to have that longing for the "what if" on the Type R's. Personally I'd get 2 10" Type R's off 1k as you've mentioned and go from there. Won't be too much on the Oldsmobile (if that's what it's in).

You can run the same amp twice but then you're going to need to build yourself a box with 2 hook-ups, 1 to each subwoofer. I'd have to look up the power but just becareful because the electrical pull might have been high on just the 1 amp to begin with (again, I dunno).

As for your E-Brake / lights on feedback issue. Yeah, there's something wrong there, your wires are touching or are not properly grounded or need a better ground or ... I-don't-know, I'm not the guy for that stuff.
But there's definitely an issue if you have whining through the system.

See what people say in this thread. Type R's are nice but it's a lot of bass, for sure.

Alero_1986

Yeah. I am definitely replacing the subs as step one.

I am having trouble defining the sounds that I am going for. But I want the low end punch without sounding too distorted. I'm looking for a set-up that is fairly versatile. I found that when switching between metal, hop-hop and electronic that my ears would constantly have me re-tuning the amp. I know that there is no clear way around this to support a broad range of music. But I would like to edge a little closer to it.
Perhaps I should stray from the sealed enclosure?

audio1der

A properly built ported box will get you more volume while still sounding punchy and clean, but that properly built box may take a couple tries to achieve.
It sounds to me as though you like the sound of your sealed box, but just want more bass? The Type Rs on the MRP-100 should get you that.
If you wanted to switch to ported if you needed more bass after that, there is always that option with the type Rs.

Alero_1986

I am still debating; is there a preference to one M1000? I was seriously considering the option of seeking a second M650. I need to settle on the amplifier before I can purchase the subs. I was thinking 2 ohm voice coils if I run the M1000, or 4 ohm for two M650's. I could also run the 2 ohm DVC at 4 ohm from each M650 but only see 400 watts.

Also, do the red/white sub out rca's from the CDA-9886 output a stereo signal?

Alero_1986

I picked up 2-12" DVC 4 ohm Type R's at a really good price. I did not realize how burly these things are.

This is not the ideal model for my set-up, but it was purchased solely based on price. Now to achieve 2 ohm I have limited myself to either one subwoofer or two amps.

My first consideration is to run just the single 12" in a slot ported box. I'm considering gross volume around 2 cu ft. I want a solid low end punch that sounds good with rock music but also comes alive for electronic and a little bit of hip-hop. What tuning frequency should I be shooting for? 28Hz? 33Hz?

I also bought a MRP-M1000 used, sold in "working order". However, this did not become the case. The M1000 powers up, but there is no output. I have discovered one faulty switching transistor (D600K), but am still verifying other components. This transistor seems to be a B#$@* to come by. If anyone has any information on locating this part, or has cross referenced another part from Digikey, etc.. this help would be much appreciated. I contacted an alpine supplier, and it can be ordered at a price of $11+$10 shipping + $ shipping cost to my address. I would be very upset to pay this price only to have it blow again, or discover other faulty components. Are there any good electronics suppliers in the GTA??

I have a 4'X8' sheet of 3/4" MDF waiting to be cut in the shop. I have considered gathering enough supplies to put together both a sealed and a ported enclosure for these subs, just to settle once and for all where my preference lies. Can anyone critique my option of slot port vs. round port for my application?

My current goal is to prefab my MRP-M1000 and my MRP-F450 into a seat mounted rack. I will then temporarily replace the M1000 with my M650 until I can properly repair the M1000. I will run a single 12" Type R off of these amps for the time being. Now, my options....

What are the potentials for running the M1000 to one Type R and the M650 to the other? Can I adjust my crossovers/tuning frequencies and enclose each sub individually to accent difference low frequencies, or is this impossible to do? Would the 2-Type S 10" running on the M650 be an option alongside a single Type-R, or is this too hard to tune?

I know there are a lot of questions in here. If there is any particular area that you fancy yourself an expert on, any insight would be very much appreciated. Thanks!