hey i making a new sub box this is my 3rd
my old. and soon to be system
3.... 10" Rockford Punch Hx2's
2.... 1000 Watts American Legacy 2 Amplifier's.. model LA690
new kenwood head 47x4.. model KDC-X617
!!i will post pic's wen im don!!
or would you like to see how its comeing a long??
its going to take me 1-to-5 week's but it will look very cool and sound very very LOUD?? im goin to run the sub's 500watts ehc"
"""post pic's of your system's up on here """"
:hail: Tony
:hail: F-body

 

Why buy 3 good subs and then power them with junk amps? That's like buying some Fikse racing wheels and putting mud & snow tires on them. Spend less on subs and more on amplification... that's where your SPL comes from. You'll be lucky to hit 130dB with that setup... very lucky. Those rockfords are power hungry pigs, and they aren't going to get any power from legacy amps.

 

1000 Watts American Legacy ? junk? Cant be....

 

I'll fight ya . one 12" Alpine Type-R DVC, recieving 600+ watts RMS (qoute for 4 ohms mono, running at 2) from an Ample Audio a240x. hits pretty hard.....

 

where can i get an ample amp?

 

i bought mine on ebay actually. its a mint condition refurbished (beautiful inside and out, i'll get pics soon). got it for $180 shipped. a couple sites i have found (trust me, been lookin everywhere for these guys): www.audiomyth.com www.powerhouseaudio.com www.nexxon.com check out www.ampleaudio.com for their page. lots of nice stuff. got some strappable class d's out now too, but i dont need that much power.....yet

 

I have news for all of you. I do custom car audio and have many MANY loud systems out of SMALL and otherwise weak amplifiers. For instance, I built a system in a 94 silverado P/U with Kenwood MP919 deck, and 1 Rockford Fosgate 300watt amp. (X300) It is powering 2 10" HX2 DVC subs, and for those of you who know a lick about audio knows that it can only be wired 4 ohm or 1 ohm with 2 DVCs. Well, I wired it 4 ohm and thats only 150watts DIVIDED by both subs. Well, durring a DB Drag we hosted, the truck hit 134db at only 150 WATTS! So, power isnt always everything. As for my system in my 3rd gen, I have the same deck, Kenwood KDC-MP919, Memphis PR 4x6s, Memphis PR 6x9s, Crossfire 1000D sub amp (wired 2 ohm instead of 1ohm) Crossfire 354ab 4 channel and a Memphis 10" HP DVC competition sub (1). With this setup, I have won awards for Clearity, Loundess and SPL. For those of you wondering, is DBd 143db ad 2 ohm and 11.3volts. I have pics of my setup, but need to find them so i can post them..

 

in the camaro i'm building, have 4 orion HCCA 15's, 2 Orion XTR PRO 2400 putting out 5360w/rms, in a wall! Kenwood, KVT911DVD touch screen and two sets of Vega IT components. Not done yet, but should hit low 160's when it's done..more info on my site..I also own a shop..

 

No... quality is. I'd take that rockford every time over the legacy. If that rockford is capable of 300 watts bridged, then each of your subs was getting a minimum of 150 watts, but part of what makes the rockford amp great is that when driving a reactive load (as opposed to purely resistive) is that the power output actually tends to increase. I wouldn't be surprised if those subs got an honest 200 watts each.

Then there's the legacy. Rated at 1000 watts. Let's for a minute assume that it's a legitimate power rating. Power ratings are measured into purely resistive loads, which are extremely easy to push. Let's say one of those legacy amps managed to produce 1000 peak watts for 1/10 of a second before bursting into flames. That would translate into roughly 500 watts of RMS power. BUT, hook that amp to a reactive load that accuately simulates a speaker, and I'll bet you don't get 1/2 that much power. So now we're down to 250 watts. But wait, there's more. Those crap amps don't run regulated power supplies, so when your voltage dips from the large current draw, the amp is going to turn into a turkey. 250 watts at 14.4 volts, but when it falls to 12 volts, maybe 200 watts finds its way out. But... we don't know what distortion level the max output was rated at. What those bozos don't tell you is that the amp is pushing 50% distortion at those power levels, so if you back it off to get into the linear THD range, you'll find your self down at 150 watts.

Of course, that's all assuming that Legacy publishes accurate numbers, which they don't. You'll be lucky to see 100 RMS watts out of that POS.

 

something tells me that as a kid you were deprived legos and erector sets, and forced to read technical institute textbooks ..

anyways, hes right about that. My EX-friend (thief) had a Jensen amp running a single Pioneer 10" in a band pass. You know the subs that look like they were diamond plated. When his car died, I put the box into my friends Mazda MX-3.
I had a Soundstream reference 160 amp i bridged and got everything in for him. ITS AMAZING!!!! With a hatchback and powerful amp, that single 10" hits like no ones business. A cheap sub with a good amp has unexpected results. I only gave him the Soundstream because i wouldn't allow an install of me to include Jensen amps in the mix.
~Tim

 

i agree entirely with jim. quality, not quantity. and when you see a 1000 watt amp for under $200, not class d on top of that, then there is gonna be some issues. i mention class d because they are inexpensive when it comes to $/watt, but still not THAT cheap. inexpensive amps over rate their specs at high voltages, while the more expensive ones tend to underrate at more typical voltages. if an amp is the size of a wallet and claims 1000 watts, you have to question the build quality. my MTX blue thunder pro 75x2 is larger than my first (and only) pyramid amp claiming 300 watts. the mtx also weighed a bit more. PPI amps (just an example) are huge and quote 100x2 for an amp almost 2 feet long. so i agree, quantity is not everything. (oh, and i'm on your side too jason)

 

It's not even that easy anymore. I dissected a legacy amp a couple years ago. I forget what it was rated at... 500 watts, 750, I dunno. It was about 12" long, 8" wide and maybe 2" tall. Well... after I popped the back panel off I couldn't believe what I saw. Under all that heat sink was a single printed board about 5x5". That's it.

 

yeah Jim! :hail: :rockon:

 

Just for clarification... I wasnt saying that the Legacy is good,when i re-read my post, it sounded sas if i was defending it. i was just saying that just because an amp is rated low, doesnt mean it doesnt make good power, for example, memphis, PG, diamond, buttler, rockford, etc, if you look, they all have VERY conservitave ratings, but at the same time they are rated at 12 and 11volts and usually have a 0.03% THD at their 4 channels. Personally, I like tube driver amps, but they are very expensive and i dont want to wait 30sec or so for my sounds to turn on =). I once disected an amplifer, i wont name any names, (pioneer) The amp was about 1ft by 10in or so in size, well, when i popped it apart, i found one board maybe 6"x6" and 4 lead weights... YES, they actually used weights in the amp at the factory. Bottom line, i feel if you havent heard of the amp, i wouldnt trust it. And even some you HAVE heard of. and if its too good to be true, it is!

 

As an alternative to the Legacy amp you could look at the JBL BP1200.1 Those are some good, tough amps that produce their rated power and more. They cn be picked up ridiculously heap on ebay. I believe $270 last I checked. If you're spending all that for quality subs, might as well spend a little more on the mp so you can drive them properly.