Bridge Mono Question

[Randy]

I have an older model ADJ Proformer Series V1000 amp and I am thinking of useing it to power a single 18" sub rated at 500 W 8 ohms. Runing the amp in the Bridge Mono Mode, specifications give it 420 W RMS at 8 ohms. Do you think this will work ok? At this time I am running through a crossover into a Crown 2000 in stereo out to the 2 subs . I am looking to streem line things a bit. What do you think.

Thanks
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[HeadlineDJ]

It's advisable to use a higher powered amp than your subs to power them, due to overhead and the amount of power the lower freq's take from an amp. Remember most amps are rated at 1Khz, and the subs run much lower than that, thus taking more power.

Is the figure 500W @ 8Ohms RMS or Program power?

If it's RMS then I'd say a 700W or 800W amp would be required to drive it with enough overhead to not clip it, which causes more damage to speaker drivers than actually over powering them.

[HeadlineDJ]

Just to add to the above...

I have two subs each 1000W rms @ 4Ohms.

In order to power these and get the full efficiency fomr them I need to use at least 1500W rms amps on each sub, for my particular subs it's ideally 2Kw rms per channel.


This is because lots of music these days produces frequencies of +6db above the normal program,, if you don't have enough power on tap to re-produce these correctly, then you run the chance of clipping or even sending DC to the drivers.

It also is a matter of do you ever run the sub up to it;s power ratings or do you never run it that high...?

What ever you do with the sub, take the RMS figure and add a good 50% extra onto the Amps output to allow for overhead.

Your speakers and guests will thank you for it.

[Randy]

Thanks, I have one more option to try and that is using just one chanel on my CE 2000 to run 1 sub. This way I do not have to change anything and have the option of 1 or 2 subs as needed.

Thanks [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

[Steve Miller]

Randy,

While the advice from Headline is correct, you do need plenty of power for subs, that is not to say that your 420 watt amp won't suffice in situations where extreem output isn't needed.

In a situation like a wedding or small event bridging your small amp will be more than enough. In larger or more rambuncious crowds where heavy bass is needed then you need to be looking at more power and more subs.

Correct me if I am wrong, but I believe that the CE 2000 isn't going to give you any more power in stereo than the ADJ amp is going to give you bridged. If the speaker is rated at 500 watts continuous or RMS bridging your CE2000 is going to give you the power you want.

[Randy]

Thanks a bunch, you have been very helpfull.
:tup