Amplifier questions

[Largo]

So, doing some research, i've decided I want to get 2 ascendant audio assasin 10's. But now I need an amp, and I have no clue about amps, I just know I want to be able to push these amps well, at 4 ohms. Manufacturer says recommended power is 200watts, so I would want a 400/2 amp that runs at 4 ohms... anyone have any advice on amps?

[TJElite]

So, doing some research, i've decided I want to get 2 ascendant audio assasin 10's. But now I need an amp, and I have no clue about amps, I just know I want to be able to push these amps well, at 4 ohms. Manufacturer says recommended power is 200watts, so I would want a 400/2 amp that runs at 4 ohms... anyone have any advice on amps?

I'm not sure what you mean by 400/2...I'm assuming you mean an amp that has can deliver 400 watts into two channels. Also called 200x2. That would work, but is not ideal, imo.

I'd go for a mono Class D subwoofer amp that is stable to 2 ohms (two 4 ohm subs in parallel). Amongst other benefits, Class D will be lots more efficient. I'd also probably look for something that is more like 500+ watts at that level, since I prefer to provide more than the RMS power to the subs. You're actually less likely to blow them this way. Ideally, you'd pick up a 1 ohm stable, 1000 watt amp...that would give you the 500 watts at 2 ohms you need now, and give you room to add two more subs down the road. The Crossfire VR1000D meets these requirements, as do many other amps, I'm sure. This month's Car Audio and Electronics is the annual directory issue, and lists specs for most of the major brand amps. You might want to pick one up somewhere.

Toby

[Largo]

I'm looking more for a 2 channel stereo amp. so I would prefer not to get a mono block

[TJElite]

I'm looking more for a 2 channel stereo amp. so I would prefer not to get a mono block

Why do you want a stereo amp for subs? There is no benefit that I can think of, and you'll spend more, for less power, and lower efficiency.

Toby

[VolvoBoiClw]

agreed, go mono, bridge it, better sound..

[93ex]

For subs, monoblock. Save the hassle.

[mbanks21]

agreed, go mono, bridge it, better sound..


Ill give you a second to edit that....








Okay, did you suggest to bridge a mono amp? :oops:

[mbanks21]

Oh, and I suggest a JL 500/1

[Notladstyle]

bridge it, better sound..


:-o :-o I so didnt catch that

maybe you meant bridge the subs together :D

[P057]

Maybe he thinks with a 2 channel he can power a sub on each channel and avoid having to use two amps for each sub? i dunno thats the only kind of (il)logical reasoning i can think of for why he'd want to do that..

[mbanks21]

One mono amp can run multiple subs. Mono D amps are more efficient and are designed to run subwoofers. Are the subs dual 4 ohm?

[Miles]

get a mono amp. stop being gay.

[TBSpyder]

get a mono amp. stop being gay.


:werd:

[Largo]

haha, yeah, and that would be the reason to get a dual channel. I don't listen to pop music, more rock, so the bass can hit on either channel depending on the recording company basically. I would prefer to use a stereo sub vs 2 mono blocks. But again, I don't know much about amps so maybe this is the wrong way of thinking

[93ex]

Maybe he thinks with a 2 channel he can power a sub on each channel and avoid having to use two amps for each sub? i dunno thats the only kind of (il)logical reasoning i can think of for why he'd want to do that..

or he wants to someday power other speakers with them.. he could power some real good components. Just sayin.

[P057]

or he wants to someday power other speakers with them.. he could power some real good components. Just sayin.

mm nope he just confirmed what i thought he was thinking. :P

[93ex]

haha, yeah, and that would be the reason to get a dual channel. I don't listen to pop music, more rock, so the bass can hit on either channel depending on the recording company basically. I would prefer to use a stereo sub vs 2 mono blocks. But again, I don't know much about amps so maybe this is the wrong way of thinking

well.........

As sound frequency gets lower it becomes more omnidirectional.

for rock music - kick drum and bass guitar.

So that gives down to ~31 hz or so, and figuring proper crossover, you wont really notice a different. Once it gets to the threshhold, your midbass/midrange should pick up.

Besides all that, unless you design a box to sperate your subs by a wide margin, you wont be able to tell a difference from the inches between your subs.

[93ex]

mm nope he just confirmed what i thought he was thinking. :P

:mad:

[Largo]

well.........

As sound frequency gets lower it becomes more omnidirectional.

for rock music - kick drum and bass guitar.

So that gives down to ~31 hz or so, and figuring proper crossover, you wont really notice a different. Once it gets to the threshhold, your midbass/midrange should pick up.

Besides all that, unless you design a box to sperate your subs by a wide margin, you wont be able to tell a difference from the inches between your subs.

Well, see, I was just listening to some music and messing with the left and right channels, and one channel would have the highs and one would have the low stuff, so that is why I wanted a stereo sub, because sometimes it would be the left channel sometimes the right.

[Notladstyle]

Well, see, I was just listening to some music and messing with the left and right channels, and one channel would have the highs and one would have the low stuff, so that is why I wanted a stereo sub, because sometimes it would be the left channel sometimes the right.

monoblock amps output both signals to the sub. doesnt matter which side its on it will still come out.

[P057]

Not only that but bass is generally an all around sound. meaning that its a little tougher to distinguish where it is coming from when you listen to music (at the appropriate levels) so it wouldnt make too much of a difference.

If you arent convinced by our information that we're giving you, you can basically get the same general information from a reputable source --

http://www.crutchfieldadvisor.com/learningcenter/car/amplifiers_faq.html#19

It says what we're telling you.

get the monoblock ;)

[TJElite]

Well, see, I was just listening to some music and messing with the left and right channels, and one channel would have the highs and one would have the low stuff, so that is why I wanted a stereo sub, because sometimes it would be the left channel sometimes the right.

Unless the music was specifically re-mixed this way, like for 5.1 or something, this is most likely some other phenomina, since that's just not how it works. Live or Studio music is recorded with stereo microphones, and sometimes 'spot' mikes placed to either side of the stage. Low frequencies, whether from an actual instrument, or from your speakers are largely omnidirectional...either to your ears, or to the microphones. While this is a topic for another thread, it has to do with the amplitude and wavelength...both of which tend to be very large at low frequencies.

I'd suspect that what you are hearing has more to do with speaker placement. Take typical door speaker installations, for example. From the drivers seat, the drivers door speaker is nearly 90 degrees off axis. The higher the frequency, the more directional the sound, and the less it will be heard off axis. The passenger side, however, is almost perfectly on axis, so the higher frequencies will seem much louder. At the same time, the passenger speaker is farther away, which affects lower frequencies more, so they will seem softer.

There's actually quite a bit more to this...maybe I just found my next Tech topic...

Toby

[custom240sx]

..........................................good luck..........

[Largo]

I see, well, mono block it is then. I just didn't know what a mono block amp did I guess. Thanks guys

[VolvoBoiClw]

so didnt say that...embarassed....:(

:(

i cant use drunk as a excuse, dont know what i was thinking