re doing sub and amps

[shizzzon 461]

yes u can, they need to be gain matched so dont just set the gain in the same position on both amps!question - are those amps 1 or 2 ohm stable?

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both im running the one i have now at 1 ohm which gives me about 1200 watts or so it says

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400W x 1 @ 4O mono

750W x 1 @ 2O mono

1200W x 1 @ 1O mono

Total Harmonic Distortion: 0.03

Frequency Response: 20~250

Power Band Width (Frequency Response): 20~500 Hz

Crossover Frequency: 40~250 Hz - 15~40 dB 40~1K Hz

Damping Factor: 100

Dimensions: 2.5 x 10.5 x 14.5 Inches

Fuse Rating: 30A x 3

Power Voltage Range: 12~16V

High efficiency Class D design(1D/2D/3D)

Output stages utilize high-current MOSFET devices

High speed, audio-grade components in all low-level stages

Active Constant Current Bias Tracking Circuit

Platinum-plated RCA inputs and connectors

Wide range of sensitivity accepts signal from any head unit

24dB/octave Subsonic Crossover

24dB/octave Lowpass Crossover

True Line Output

Auto Bridge feature

Short Circuit Protection

thats the specs on it

[shizzzon 461]

so u need a powerful dual 1 ohm 18.. there's the Fi BTL, AQ HDC3 Aluminum Coil, Nightshade, DC Level4 XL, IA Death Penalty...

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hmm im going to look into those ill be back on here tonight and let u know my choice thanks for helping

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ok let me ask u this if i use both amps like i plan on doing at the one ohm is that gonna give me a total of say 2400 watts on the sub?

Edited September 30, 2009 by bjballar41

[shizzzon 461]

yes it will and all the subs i named off WILL handle the power fine as long as you set the amp's up right and not clip the hell out of them all the time.

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ok just making sure i understand everything right. another question i have is how to i gain match the amps?

[shizzzon 461]

you must have an oscope to properly setup an amp in the first place.

If u do not have one of those, then u can match them via multimeter to make sure they both put out the exact same voltage on the speaker terminals.

Note - do this with a test tone playing.

as an example and a somewhat guesstimate of what u should be lookin for-

35v is what it should be if it was actually seeing a true 1 ohm load during play but it wont so the voltage reading will probably be higher... Not suppose to be but that's just what happens typically with amps.

So.. as an example, instead of aiming for 35v, aim for somethin like 43v even on both amps.

It's gonna get LouD, trust me.

You are not to this stage yet and will have forgotten what i tell u here when u get there. Come back and ask or just PM me when the time comes!

You are gonna need 2 DMMs (digital multimeters) to do this and the amps need to be adjusted together, not individually.

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i watched a video of ***** ***** using an oscope but it was along time ago. so doing all this with the amp sounds hard is it or is it easier than it sounds? ill be sure to keep that in mind about coming back to u cause it will be awhile

[shizzzon 461]

it's not hard, lol. Basically, u just set your head unit up and all that, turn both gains on amps just under half way up... let the tone start playing but have the head unit volume up like half way then have someone else turn the volume up so u know the sub can take it without moving too much then turn it back down, the hu's volume.

Now, you turn it up to it's maximum listening level, blast the tone and immediately start adjusting the gains on both amps til they output the exact same voltage. You must be turning them together as turning just one will effect the other.

Once they are pretty damn close, you are done. I would be aiming for around 43v per amp during playback.

If u just cant do it for some reason, pay the $115 and buy u a Maxxlink and it'll do it for you.

[[email protected] 1]

sweet thats some great info there thanks a ton. im leaning towards the dc level 4xl, fi btl, and ia dp. is there anything i need to know about them?

[shizzzon 461]

yes, they are car audio subs

Whichever u choose, make sure it's dual 1 ohm.

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lol great info lol smartass lol so pretty much anyway i go is a good option is what ur saying lol

[shizzzon 461]

i wont recommend some great subs and some shitty shitty subs... I recommend what i'd run personally.

[jcarter1885 995]

pretty much, theres no right or wrong choice.

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ahhh thats good a good clean honest guy im glad ur like that do u know the price of a dc level4xl or should i call?

[jcarter1885 995]

ahhh thats good a good clean honest guy im glad ur like that do u know the price of a dc level4xl or should i call?

email Rusty at [email protected] or call the shop 1-775-425-5700.

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already on top of it lol thanks

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well it looks like its down to the fi btl, dc lvl4xl, or the ia dp all 18 inch anyone have any comments about them ill be running 2400 watts from two md1d usamps.

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bump on this its gonna be daily so its music only so its gotta sound good i think im leaning towards the ia or fi