transam_089

i searched and couldn't find anything

so my question is are the infinity amps a reputable company???
cuz im gonna b buying a 4chan. amp for my CDT speakers and a mono sub for my 2 10" rockford fosgate P3's

95bat

iTrader: (1)

They shouldn't give you any trouble.

ultraz

iTrader: (4)

i wouldnt reccomend them. Their older Infinity kappa amps they used to make over 5 years ago were good. The new ones are oversized and the quality is not the best. Some nice amps that I would reccomend would be eclipse, alpine, or even RF if ur on a budget. I have used many kicker amps in my setups and they sound great, but they are rather large.

95bat

iTrader: (1)

^^ Those are all good, expensive amps.

transam_089

well heres the links to the 2 that i was lookin at. Don't how old they are...maybe 5 years old like u said ultraz????
the 4 channel
http://cgi.ebay.com/ws/eBayISAPI.dll...4972&rd=1&rd=1

mono
http://cgi.ebay.com/ws/eBayISAPI.dll...0515&rd=1&rd=1

letsrun97z

iTrader: (7)

the 7541 is what i have powering my perfects and its a greatamp

BrentHamm

iTrader: (15)

I have both of them and a 1211. I like them all.

They are kinda big..especially the 1211 but am happy with them.

ultraz

iTrader: (4)

those are the newer ones. Theyve been out for like 2 years or so. The old ones had green acrylic, not blue. THe new ones are REFERENCE series, the old ones were KAPPA. Take a look at some nice RF amps, u can get them rather cheap. Whatever you do, dont buy jensen or audiobahn.

The Guz

iTrader: (8)

I have their 6 channel amp and it has been good so far.


Mike

transam_089

yea i was lookin at alpine, rockford fosgate, and the infinitys and so far the infinity are givin me the most power for less money then the alpines and RF's so i might just buy them due to the 3 posts backing up their quality

...unless someone has anything bad to say bout them???

thx guys

BrentHamm

iTrader: (15)

Where are you going to mount them?

I think i might try in the spare tire area.

ultraz

iTrader: (4)

Well if ur looking at Wattage, you should prolly look at Signal to noise ratio. IT can tell you how efficient it is. Wattage is important, but an amp with gobs of wattage output is still no good with a low Signal to noise ratio.

KEE AUDIO

iTrader: (65)

Rockford amps are always underrated anyway. They are alot louder that what they advertise.

95bat

iTrader: (1)

Some of the best amps out there have low signal to noise ratios. The SNR doesn't tell you how efficient an amp is... the efficiency rating tells you how efficient it is You will also be able to tell how efficient it is if the amp advertises its current consumption at rated output, too.

Perfect example is the Zed Audio Minilith. It has an 89db SNR, but a Hifonics BXi 1206D has a 95db SNR. The AUdiobahn A8000V advertises a 100db SNR even. The Minilith, however, absolutely destroys these amps in every way possible.

The Zed Audio Gladius has a 98db SNR and was recently reviews as one of the top 5 SQ amps ever tested by Car Audio and Electronics magazine.

SNR isn't everything

transam_089

yea walking-dead ive been tryin to find a 4 chan. RF amp thats givin me about 75 RMS x 4 but i havent found any
and for my subs the mono RF subs arent givin me what i want...im lookin for 400-550 RMS x 1 on the subs
anyone got any links or suggestions thatd b great

i was looking at this brand called Earthquake and it was showin some insane wattage so i dunno if thats trustworth or just a shitty brand

and thx for explaining the SNR 95bat

todddchi

iTrader: (3)

Memphis baby belle:

75x4 @ 2 ohms
400x1 @ 1 ohm

Can be found used for ~150-250 every now and then. Very compact and efficient.

I don't know what you have on your sub right now but realize there isn't a big difference between 300rms and 450rms. It's not linear. Often times the time is better spent on enclosure tuning.

transam_089

my speakers and subs r 4 ohms...can i run them as 2 ohms and 1 ohms???

whats enclosure tuning??

todddchi

iTrader: (3)

The memphis will do 55x4 into a 4ohm load. The subs are more of a problem because with 2 4ohm subs you can only get to 2 ohm load... so only 200 rms which isn't enough.

So I would look into a memphis 4 channel (same 55x4) and a memphis 500 class D (mono sub amp does 500rms at 2 ohms). Those auction up all the time. Or maybe just whatever 4 channel you want with the Memphis for the subs. The 500 watt class D amps pop up all the time and match your needs perfectly. I have one for grabs if you can't find something on ebay.

For enclosure tuning, I mean simply checking that your box matches your subs. You want max volume output, it should be ported. And that requires proper tuning as well.

Lookup your subs, RF should have recommended enclosures for them. If you just put them in a box without thinking about how well they matched, that could be a lot of your problem.

A single 10" in a properly matched and tuned ported enclosure can sound better with 150 watts than two 10" subs with 400 watts in the wrong enclosure.

transam_089

k thx buddy