input on these 8" subs

[bp4131017 10+ year member]

http://cgi.ebay.com/ebaymotors/2-New-650-Watt-8-Sub-Acoustic-Audio-BASS8-Subwoofer-NR_W0QQcmdZViewItemQQcategoryZ38647QQihZ001QQitemZ110032082553QQrdZ1

I'm looking to get some decent sound quality for relatively cheap, I'm going to build my own box once i get some subs, but what kind of sound quality would these really offer me?

Also, what kind of amplifier would i get just to run these two subs? would i need a two channel? and would it have to be at 4ohm or 1 ohm? or what?

I'm a newb, and a lot of things come really easily to me, but car audio is still somewhat of a foreign language to me.

Thanks in advance for help

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[bdawson72 5,000+ posts]

u wouldnt need a 2 channel.....but i dont quite trust the subs

 

[Phreaker 10+ year member]

No,you want a MONO amp a.k.a. Class D amp.

Mono means one as in one terminal which has a + speaker input terminal and a - speaker input terminal.

Mono/Class D amps are much more efficient then Class A/B or 2 channel amplifiers.

Figure about 50% to 60% efficiency from a Class A/B and 75% to 95% efficiency from a good Class D amplifier.

Mono comes in handy especially when the amp is stable down to 1 ohm.

You have SVC (Single Voice Coil) and DVC (Dual Voice Coil) subwoofers and in some cases the rare QVC (Quad Voice Coil) subwoofer.

Almost all SVC car audio subwoofers are 4 ohms but there are some that are 8 ohms and I beleive there are some 2 ohm SVC subs too.

DVC subwoofers 99% of the time will be either 4 ohm DVC (Two 4 ohm voice coils per sub) or 2 ohm DVC.

Having DVC subs allows you more wiring options from wiring multiple subs to eaxtracting the most power you can from your mono/Class D amplifier.But you must be carefull,if your sub will present an ohm load lowr then the amp can handle or is stable at then you run risk of damage to the amp and the sub(s).

As far as those subs go...LMFAO....No way man those **** hairy ape balls never even heard of them and they are rated 8 ohms and 325w RMS and probably would blow if given a real 325w RMS each.

What are your goals for your application...to be loud and beat the street or to sound good or a mixture of both.

Are you an SPL person or a SQ/SQL person? *EDIT* *I SEE YOU SAID YOU WANT DECENT SQ*

How much are you wanting to spend total on your cars stereo?Working with the Factory HU or an Aftermarket HU?

Seeing as you sound Like a complete car audio newbie (which you have actually stated) I'll be a big help and help to get you started of in the right direction....I've only been into and understood the basics of car audio now for about a year or two.

When I first started out 2.5 Years ago with two Visoik 10"s in a Dual 10" Bandpass box and a Profile CA600M Mono/Class D amp and some crappy HU I did'nt know shit....really I didn't.

I read up on crutchfield how to set the gains but didn't pay much attention to it and set by ear and ended up using bass boost up and gain up and HU volume clipping maxed out and bass control on HU all the way up treble all the way up fader more toward the rear stage then the front stage.........you can guess what happened next.

Then I decided ok lets get two 10" Sonly Xplod's and put them in the bandpass box on the Profile CA600M and a new HU,a Sony CDX-M630.

Bass centered,treble up a bit,fader centered,balance centered,subwoofer volume/level up all the way volue up as far as it could go untill it sounded like absolute ***......again you can guess what happened....

Then I decided to look around on the web and came across this forum and many others like it,some a good place to learn other a crying shame.

I asked questions and more questions and got answers from those that are actually saying someting and didn't listen to those who blow hot air out their mouths.

I then came across this place http://www.bcae1.com and well that covers more car audio basics then you'd like to probably learn about but that place is packed chaulk full of infomation.

Check it out,read some of the basics and learn and gain knowledge....

Good Luck on your trip through the car audio world.

 

[skeptikal Premium Member]

dude really to tell you teh truth, dont pay to have those things shipped to you. They may not be the best sounding woofers in the world, but even if they are i dont think it will give you enough output to hear it thru your trunk lol

 

[~Magick_Man~ 10+ year member]

dude really to tell you teh truth, dont pay to have those things shipped to you. They may not be the best sounding woofers in the world, but even if they are i dont think it will give you enough output to hear it thru your trunk lol

my thoughts exactly.

and shipping is $40 which is way too high for 2 little 8's

~Magick_Man~

 

[dennisthamenace 10+ year member]

go with ascendant audio assasin 8's.

 

[bp4131017 10+ year member]

well i'm selling my car right now, so i'm speaking about all of this for the new car, whi ch i'll be getting a new head unit for. THe main key for the head unit is to have it be ipod ready, but specs wise, what would i be looking for in the head unit?

It's going to be a hatchback, so i'll be setting it up facing the glass on a slightly upwards angle.

I listen to some rap, but it's not new rap, its like older dr dre and whatnot, and the bass doesn't have to be thumping/overpowering. I listen to mostly all classic rock and am just going for sound quality.

My budget is trying to be as low as possible, with still getting good sound quality, because otherwise it's just a waste of money.

 

[loud-n-low 10+ year member]

aa asassin 8's

 

[bp4131017 10+ year member]

Are the assassins mainly for sound quality? and are you going to find anything quality much cheaper?

 

[loud-n-low 10+ year member]

good sq, also good output, I havent found anything that price that performs as well

 

[ultimate157 5,000+ posts]

good sq, also good output, I havent found anything that price that performs as well

$50 for an 8 that sounds great and outputs well too. I think my next system is 4 of those little guys.

 

[Mugen 10+ year member]

I got my 2 AA 8"s for $128 shipped, ordered them Wednesday night. Man, I can't wait for it all to get in //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I don't know your price range on amps, but I ordered a BXi 1206D for $254 shipped. Could've bought it off ebay for like $10 less, but I'd rather just get it from an actual store, never was a fan of ebay.

From what I was told, these things are about some of the best 8"s you're going to get, especially for the price.

 

[pwuthedon 10+ year member]

go with audioque 8's. a lil more money, but worth it

 

[Phreaker 10+ year member]

go with ascendant audio assasin 8's.

X2 Best bang for your buck on 8"s and yes theyy are SQ oriented but have good output aswell.My G/F has two 10" AA Assassins in a 2ft^3 sealed box I built for her and we need more amplifier for them....210w RMS from my old Profile CA600M (probably more like 150) to each 10" Assassin ain't enough.

Get 4 of them and either seal them for total SQ (box size will help with output) and Flat response or port them at about 30-32Hz.