Printer Friendly Forum Posts - Amplifier configuration for 6 1/2 & subs

I am new to this forum and would like your advice.

I have just purchased a Nak CD-700II HU and PA-2004 amplifier and already have a Fosgate Punch 60 DSM amp (30 x 2). I also plan to get 6 1/2 components for the front doors and 6 x 9 subs for the rear of my 2003 Volvo V70 wagon. I do not plan to use any speakers in the rear doors.

Is the best set-up to use the 4 channels of the PA-2004 for the front components ,without the use of the passive crossover, and the rear subs powered by the Fosgate? I don't listen very loud, prefer Jazz and Classical and don't like music coming from the back of me. My thinking is the subs with give ambiance and bottom extension but nothing else. SQ is my biggest priority.

TIA,

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Robert

I'd use two channels of the PA2004 (great amp) for the front components WITH the supplied passive crossovers. Run your small subs from the other two channels of the Nak and sell the Punch on eBay.

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DYohn] wrote:

'd use two channels of the PA2004 (great amp) for the front components WITH the supplied passive crossovers. Run your small subs from the other two channels of the Nak and sell the Punch on eBay.

Ditto advice.

Im thinking that it should sound ok to bridge the 4 channel amp to a 2 ohm stereo load to the components in the front doors. Im not too shure about the 6 x 9 subs in the rear. They may sound ok with the Punch 60 if you can get a well balance in the system.

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99 F-one fitty
Pioneer Premier H/U
Alpine EQ
Kicker 1200 amp
4 Kicker comp 10s
6 kicker SS65.2 components

Thanks for the very quick responses. But something tells me that running the component fronts without the passive crossover will yield better SQ. If this is the case and the Punch 60 is not good enough for the rear subs then I will get a better amp. Or is it generally a bad idea to run components actively using the inboard supplied crossover in the NAK amp in my case.

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Robert

the H/u doeas have a crossover but If I understand correctly , the way your suggesting is to run an upper frquency that is filtered at the head unit and than send it to the front compnents? You will get a sound maybe close to what your looking for but its just my opinion that you should USE the passive crossover and run the signal off the radio full frequency. I believe this will give you a fuller , richer , maybe even a fatter sound. In other words, Run the signal RCAs to the 4 channel amp , bridge the amp 2 channels to the passive crossovers and then to the components. Just my opinion........Its up to you if you want to dump the whole bass thing in the back or not

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99 F-one fitty
Pioneer Premier H/U
Alpine EQ
Kicker 1200 amp
4 Kicker comp 10s
6 kicker SS65.2 components

I would keep the passive crossovers, because the manufacture intended them to be used with the speakers, and it would be a lot harder to make the speakers sound right without them. Don't bridge the four channels of the amp (it would be like running the amp at 2 ohms and that would result in more distortion and worse SQ) just use one set of channels for the fronts and one for the subs. This would result in the best SQ you can achieve with this setup.

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Rusman, I am planning to run the front components fullrange. The sub in the rear is just for added bass fill. The active crossover used would come from the PA-2004 amp.

I should also add that I have a sophisticated portable computer software frequency analyser and the Beringer ECM8000 mic and 110 pre to tune the set-up. I use this equipment when I analyse and tune my different prototype home audio loudspeakers and drivers before they go to market.

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Robert

I think i $hit myself when i read that. ... You are one lucky guy to have the CD-700II and the PA-2004. I have a CD-45z and a PA-1004 and they are great for me. But seriousy sell that fosgate amp, as it does Nak no justice. Use the PA-2004 amp (Fantastic) to run both your components and your 6x9's, and check into Nak's external crossovers at www.nakamichi.com and you'll be fine on how your power is tuned as well as frequency. Check your manual for that head unit. it is the best one made and it has a lot of things you don't know about so read on. It has an insane DA converter (24 bit or something like that) and a built in crossover so you should just be rolling along smoothly.

Good luck with that.

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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.

Once again, thanks for all the replies. I will use the PA-2004 with the front components (Passive crossover) and rear 6 x 9 subs and sell the Fosgate. I used to have the CD-45z in my previous car but sold it with the car.

Do I dare ask what 6 1/2 components should go in front and what rear 6x9 for the back? Again, SQ is my main priority. Any thoughts about www.B-Quiet.com damping sheets. I like the idea of them made in Canada.

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Robert

Nothing wrong with Nak's 6x9's at all. SQ are fantastic in them so i would highly recommend them. A problem presented though is the wattage. The amp gives out 100 W x 4 @ 4 ohms and the 6x9's are only 55 W RMS and 110 WPEAK. There are a lot of good 6x9's out there, and this is one of them; You might want to look for one that will hold more power though.

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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 agree with DYohn's advice. Listen to him - he knows what he's talking about.

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New Project: 2003 Pathfinder

We all know what we are talking about - but we all need help from time to time. Let me know what 6x9 you roll with by the way. - Tony

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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.

As far as components are concerned, only your ears can tell you which ones will be the best choice for you in my opinion. There are several great sets out with different attributes to them. My personal preference is the Diamond Hex series w/ Silk tweeters, but I have listened to Bostons, Focals, MB Quart and others. They all sound fantastic, so your music and ears will have to be the ultimate judge in the decision.

My question for you was upon using 6 x 9's for subs. Is this due to personal preference or size constraints? I know focal makes a 5" subwoofer that has had some great reviews if you needed a small driver to play low. I haven't heard much about 6 x 9's being used in high-end systems, but thats just me.

When it comes to components, stick with Focal's, CDT's, Adire Koda's, Cadence CVL-6K's, or the Nakamichi SP-S6500. Those are all great components.

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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.

All I can offer is this, I have replaced the 6x9 in the rear of the car with co-ax's 5 1/4's going to go with 6 1/2's very soon. I will never never never run 6x9's in the rear of a car again

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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

You'll never see a 6x9 in my car again as well. 6.5'' Components only for me.

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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.