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Radcman7

Need Help with a new build

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I'm getting a 10-13 Mazda 3 Hatchback pretty soon now. I'm trying to decide if I want to keep my current system or upgrade it. Just looking for some advice.

Current system

Pioneer AVH-X4700BS headunit

NVX JAD 900.5 5 channel amp 75w x 4 at 4ohm 440w x 1 at 2ohm

Polk audio db 6.5 components and coaxial 

Sundown SD3-10 in underseat truck box.

 

Option one would be swap the shallow sd3-10 for a sundown sa-8 v3 in a ported box, how would it be on 440w at 2ohms. Maybe swap the 6.5" coaxial for 6x8 coaxial for rear door. I'm sure the ported sa-8 would have more bang then the 10 in a sealed box, cheapest option

option two would be upgrade the amp and do the sa-8. I want to keep a 5 channel for easy and less space. I was looking at the hifonics brutus btx 60w x 4 at 4ohm and 750w at 2ohm 1000w at 1ohm, loose power to speakers but gain power in sub stage or the soundstream t5.2500DL 75w x 4 at 4ohm, 500w at 2ohm and 750w at 1ohm. would cost a bit more but is the cost of a new amp worth the gain?

option three upgrade to one of the amps and do the x-8, most costly of the three options. 

Any other options, I want to keep a 5-channel amp and do a single 8" as long as I can do that I'm open to any suggestions. I'm happy with the speakers so don't really find a need to change them. just looking for my best option for low end. Not looking for SPL or SQ just something that's easy to listen to without breaking the bank.

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29 minutes ago, Radcman7 said:

Option one would be swap the shallow sd3-10 for a sundown sa-8 v3 in a ported box, how would it be on 440w at 2ohms. Maybe swap the 6.5" coaxial for 6x8 coaxial for rear door. I'm sure the ported sa-8 would have more bang then the 10 in a sealed box, cheapest option

How do you know the 8 will be louder? you are giving up cone area and keeping the same power so??? Yes ported would be louder but you are losing cone area so it could be a toss up. If you are going to upgrade power and go ported then would definitely make a difference. For the X-8 you would need to double power over the SA to have a noticeable difference. even then it is not like wholly shit difference.

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2 hours ago, THATpurpleKUSH said:

What is your budget for a new sub and enclosure?

I'd like to keep the whole build under $500, which is why I wanted to reuse what I have.

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45 minutes ago, Radcman7 said:

I'd like to keep the whole build under $500, which is why I wanted to reuse what I have.

I would keep the NVX 5ch and move up in cone area. A single 8 isn't going to produce a whole lot, even ported, especially on the limited power of a 5ch. Switching to an efficient 10 or 12 with a well designed ported enclosure will give you some good bang for the buck. You could save a lot of money by building the enclosure yourself too. For under $150 (sub and box materials) you could easily accomplish your goal.


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54 minutes ago, THATpurpleKUSH said:

I would keep the NVX 5ch and move up in cone area. A single 8 isn't going to produce a whole lot, even ported, especially on the limited power of a 5ch. Switching to an efficient 10 or 12 with a well designed ported enclosure will give you some good bang for the buck. You could save a lot of money by building the enclosure yourself too. For under $150 (sub and box materials) you could easily accomplish your goal.

Yea I have no problem building my box. The 8s more or less for space saving. My previous vehicle I was running two sets of Rockford fosgate t2 components, rf power t400.4, two rf power t1000.1 one for each sundown sa-12. All in a scion tc. Not super high end, but I spent a good bit on that setup. Now I'm focusing more or less on a lower budget build just want something decent not really looking to get crazy loud. I think I'll try the sa-8 out and worse case sell it and move up to a 10 or 12.

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If space is your issue then I agee with THATpurpleKush.  Give it a run but a separate class D subwoofer amp will give you more power then the 5 channel amp and with subwoofers, its the box that makes the difference and the size does matter if you want more then a 'thump' in your system. Good to know you have some woodworking skills to churn out a box so that's saving money on your part.  Give it a run for a week and if you are still not happy then upgrade to a larger subwoofer that works well in minimal space.  I can understand downsizing from the T2's to 8 inch is a big difference but its always good to change things after a while and less pressure on your ears as well!:veryhapp:

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8 hours ago, DRBOOM said:

If space is your issue then I agee with THATpurpleKush.  Give it a run but a separate class D subwoofer amp will give you more power then the 5 channel amp and with subwoofers, its the box that makes the difference and the size does matter if you want more then a 'thump' in your system. Good to know you have some woodworking skills to churn out a box so that's saving money on your part.  Give it a run for a week and if you are still not happy then upgrade to a larger subwoofer that works well in minimal space.  I can understand downsizing from the T2's to 8 inch is a big difference but its always good to change things after a while and less pressure on your ears as well!:veryhapp:

Yea, I figured, I'll just run with it. The system in my scion was so heavy on an already heavy vehicle. Not  looking to get into all that again, at least not for a while. Also I saw a post from Jacob at sundown saying underpowering the subs you could do a slightly larger box. Website Recomments .5-.75 cu on rated rms or slightly more, what about slightly less could I do like .8-1cu or keep it at the recommended?

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