You said you are running the 3-channel amp right? If memory serves me correctly, you have the predecessor to the 603X...... and I think you were running two channels for fronts and rears in 2-ohm load, and then mono for the sub.. right?

I was originally going to go with the 603X, but now I wonder if the 403A would be good enough. It still seems like a really good amp, even if it is a step below the X series. It's a 3-channel with 2x50 stereo + 1x150 mono in 4-ohm, and 2x100+ 1x200 in 2-ohm. If I'm running the fronts and rears off the stereo channel, then that will automatically make it two ohm, right??
I'm thinking that's MORE than enough power for me. What's your opinion on the setup? How many subs are you running? Are you using rear-fill?

Thanks for input.

 

Thats sounds good in practice... but the rear channel as mono channels go is well.. weak. I have 2x60 1 x180 at 4, so i really have about 1x360 at 2... on one twelve... its gonna be ok, but its not a whole bunch.. and at times will lack punch especially in a trunk. In a hatch it would be great...
Im running ID Cham 5.25's (4 ohm) and for rear midbass im running IDQ6.5 midbass drivers (no tweeters..just midbass) its decent now but definitely needs an eq. im still debating on moving the 6.5's to the kick panels leaving the 5.25's in the door and adding the sub and eq.
Ive posted previously on my opinion on line drivers... while if running off the stock unit my tune has changed... i had to add 2 xtant Balance Line Modules to help filter the engine noise due to lack of signal voltage. Again i may have image build me a DAC and run 20+ volts out of it... depends how serious i want to get.
I will be (still waiting for test model) 1 IDMAX12 (rms 1500 watts) so 360 is a little light but im told will be fine. My experiences about the mono channel are from others cars.
Hope that answers your questions

Darren

 

you mentioned you have your fronts set up at 4-ohm. If you are also running the rears off the same channel, doesn't that automatically make the whole thing 2-ohm?

If that's not the case, then how DOES one make it two ohm? (I'm illiterate with this stuff!!)

I was under the impression that if I go with a three channel amp, and run the fronts and rears off the stereo channels, they'd automatically be in 2-ohm mode. Is this wrong?

 

That is correct, but i could have bought TWO ohm fronts and rears running the amp at 1ohm load, so thats bad for the amp. 4ohm front/rear keeps the xtant within specs.

 

I have 4-ohm Diamonds so I should be fine.

As for the subs... I dunno... I gotta talk to the guys at Diamond and see if two motorsport 10's will perform well off a 200 watt (2-ohm) mono channel. I'm not lookin to shake the earth, so maybe that will be enough. I guess it all depends on the efficiency of the speakers.... hell, I have a JBL Pro dual voice coil 10" in my trunk running off a Clarion amp- 30 watts into each voice coil, and it hits pretty hard..... at least to a level that is satisfying to me. Having said that, I would think that 200 watts into the Diamonds would be plenty.

By the way, tell me what you think of this....... I got into a discussion with a salesman at a local shop about mono-vs-stereo subs..... he said that running two subs off a single mono channel won't sound as good as running them in stereo. He claims that your ears can perceive the bass in stereo, and that a single mono channel can't hit as fast as two stereo channels (for example during especially fast bass drum parts in progressive rock), and so the mono setup might sound "slower" and "muddier" than the stereo setup. What's your take on that? I'm not sure I agree with that or not... I think I would lean towards disagreeing with that... but then again, what do I know?!?!? This came up because he carries Diamond. I was asking him about pricing on Motorsport subs and he asked what kind of amp I was planning on using. I told him Xtant 3-channel. (he doesn't carry Xtant- or anything in 3-channel for that matter) I think maybe he was trying to sell me a 4-channel amp instead of me buying a 3-channel Xtant amp somewhere else. What do you think?

Thanks again!

 

in theory that may sound real... but ive been in some awfully high end car audio systems and none of the "tuned" ears could tell u wether or not the subs were running mono or stereo.
He's yanking your chain.

Daren

 

.... I guess it's one of those things where every once in awhile, someone tells ya something totally contradictary to what ya thought ya knew, and it makes ya stop and question your own convictions.... (hey, call me gullible!)

Hey man, thanks again for the advices... I'm sure I'll be buggin' ya again in the not too distant future! I'm getting close to making a final decision on the amp, and I just want to exhaust every possible solution/ scenerio and make the right amp decision the first time.

cheers

 

mono is basically left channel "XAND-ed" (boolean) with the right channel. stereo bass is more real and more preceiveable in home systems.

bass is not entirely omni-directional. yes, the frequency waves travel in all directions but the human ear can still detect energy levels in which ever direction.<p>2000 A4 1.8TQMS

 

The mono channel is OR-ed because you will hear whatever comes out on either channel.

In an OR situation, so long as one input is active, the output will be active.
In an XOR (Exclusive OR), *only* one input can be active to give an active output.
In an AND situation, *all* of the inputs have to be active in order for the output to be active.
An XAND would suggest that only one (ie exclusive)input would need to be active - and that contradicts the idea of AND.<p>Mark P

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