Nakamichi stuff, need opinions

I am building a system with mostly Nakamichi equipment. The goals of this system are to have Excellent Sound Quality, with enough bass, but nothing extremely "boomy". Here is what I have so far:

HU = Nak CD700II
Front speakers = Nak SP-S6500
Rear speakers = Nak 6x9 SP-C692
Subwoofer = I can't decide between the Nak SPW120S 12" SQ Subwoofer and the Nak SP-W124S 12" MOBILE SUBWOOFER. WHich one is better? The only difference I can tell is that the SP-W124S has a thicker surround and handles 350W RMS to the SPW120S 200w RMS. Which one will be better for Sound Quality?

Amp to power front and rear speakers = Nak PA2004 4 Ch
Amp to power sub(s) = Nak PA8001 1 Ch 1000 Watt

How does this setup look so far? What sub should I choose for Sound Quality? Should I get 1 or 2 of them. Note that the trunk on an Infiniti Q45 is completely sealed off from the cabin. That may affect bass.

Also, is the amp that I chose to power the sub a good choice for them? It is rated at 800RMS x 1 @ 2 Ohms. I'm thinking that 2 Nak subs(4 ohms each), wired in parallel would be the best way to wire the subs on this amp.







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well, for sq I would either go with 2 10's or 1 12...thats just me personally, as far as the trunk being sealed if you lack bass that much, which with that much power you shouldnt..but try rebuiling your rear window deck to allow arflow into the cab

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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place

Thanks for your reply.

Whick one of the Two subs that I named should I get? What are the differences between them?

Thanks
-Brien


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The 124 is a good sub, but i am plenty pleased with my 2 SPW120's as well. To tell you the truth, the SPW1200D is a better sub then all of them. I had one and i loved it, but later sold it to a customer (everyone has their price). It cranked with great SQ. I'd get one of those or two of the SPW1000D and just get a bigger box.

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

The PA8001 is plenty for the 1 12'' SPW1200D, but if you really want 2 woofers i would recommend getting another PA-2004 and bridging it. Then i'd run the two SP-124's or SPW-120's. in it. They are both good amps. CD700ii is the best head unit ever made in my opinion.

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

So, youare suggesting that I get another PA-2004 Nak amp? That is about the same price as the Nak PA8001 1 Ch 1000 Watt. SO why would I get the 4 channel amp? Is there something to be gained?

So, I think I am going to get 2 SPW120's.

Should I get another PA-2004 4 channel amp, or should I get a PA8001 1 Channel amp?

Thanks for the replys


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PA-2004. It is a four channel amp, but when you bridge it you get two channels, which would be ideal for running 2 subs.

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

I am not to familiar with the new Nak amps, but why or what would be the advantage to him going with a second 4 channel amp as opposed to a larger 1 channel. This doesnt make a whole lotta sense to me but I am sure you have a good reason, I just dont know what yet

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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer

First, in another thread you mention not wanting "excessive" bass that competes too much with the mids and highs.  If this is really the case,

1) You don't need 2 subs.  2) You don't need that much power behind them. 

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New Project: 2003 Pathfinder

I'm thinking that 2 12in Nak subs will work well with the 4 channel Nak 2004 amp.

To keep from getting to boomy, I could adjust the gain, correct? At first, tune the Gain to the maximum possible without distortion, and then turn it down until it seems not to over power the Mids and/or highs. Does that make sence?

Thank you for replies.

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Look at my most recent post in this thread of yours:

https://www.the12volt.com/installbay/forum_posts.asp?tid=44463&PN=2&tpn=2

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New Project: 2003 Pathfinder

I guess it would (as referring to the gain) but Ravenderat, the advantage of using the PA2004 over the PA8001 is that the PA8001 is a monoblock, and you'd be runnin two sets of wires from the output block on the amp to the subs, and when your running that, that could increase impedance and distortion. (That is of course unless you wire sub to sub) I highly recommend the 2004 as it is very efficient when bridged and will give you the power you need guaranteed at 2 channels bridged. Clean, nonstop, pure power with unmistakably fantastic SQ. Nakamichi just cannot impress me anymore with their products!!!

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

uthinkuknoaudio wrote:

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Ravenderat, the advantage of using the PA2004 over the PA8001 is that the PA8001 is a monoblock, and you'd be runnin two sets of wires from the output block on the amp to the subs, and when your running that, that could increase impedance and distortion. (That is of course unless you wire sub to sub) I highly recommend the 2004 as it is very efficient when bridged and will give you the power you need guaranteed at 2 channels bridged.

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First, the efficiency thing.  I think this is the wrong word to use here.  Do you mean, "produces more power when bridged?"  Or what?  Because a class AB amplifier, like the 4 channel, is almost always LESS efficient than the class D amplifier.

Second, the increase impedance and distortion thing.  I think you have it rather backwards.  Decreasing impedance usually increases amplifier distortion.  "An amplifier depends on a high enough impedance to prevent too much current flow through the output transistors."  See Bridgeable Amplifiers at www.bcae1.com.  When you've got more current flowing through the output transistors, like you do when you bridge, distortion generally increases. 

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New Project: 2003 Pathfinder

lol, i worded it wrong, but that is what i meant. When you run them at a lower impedance distortion increases. The 2004 produces more power and cleaner power when bridged than you will get out of the 8001. The 8001 is a great amp, but I would really go with the PA2004 over it. Thanks for that krf01 !

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

Ok, but wait .. the lower 2-ohm impedance is going to have the same effect as bridging the PA2004.  Distortion will also increase on the 2004.  The 8001 is probably more efficient because it is class D.  The power, 400 to each sub, will be the same. 

So, now I'm back to Ravendart's question:  why is a 4-channel amplifier better here?

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New Project: 2003 Pathfinder

I've had better sounding systems come out with the 2004 being used bridged then i have the 8001. I am telling you that by ear. It sounds better. I highly recommend the PA2004, enough said.

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

Thank you guys for the info. I have decided to go with the PA2004.

If for nothing else, it's the simple versatility of it. I mean, if I needed to power four more speakers for some reason, I could drop the sub and use the amp for the additional speakers.

ANyway, I have heard Nak amps before, and it seems that even at their lowest ohm load, they still have barely any distortion whatsoever.

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