4430 ..how many watt's..??

["Duke" Spinner]

using Crowns calculator...

to get 105 dB @ 15'...

i need 650 watt's ....

i'll bet no one here is running that ....

whatcha got ..???.....

[clmrt]

Linky to calculator?
found....

http://www.crownaudio.com/apps_htm/d...ct-pwr-req.htm


For my 4628's to hit 105db @ 3m with 3db of amp headroom, 90w.

Ha ha.

[Zilch]

whatcha got ..???.....

My hearing, thankfully.

[Most of it, anyway.... ]

[Don Mascali]

I have a cloned 4430s plus additional 18"LF, 2-12"MF and a 2404VHF per side.

They are tri-amped and have 700wpc on the 18s, 700wpc on the 2235s, 350wpc on the 2-12"MFs and 75wpc on the HF/VHF horns.

Power and SPL I've got . Still tweeking after all these years, but it keeps me off the streets.

It is way over kill but too much is never enough.

[edgewound]

The JBL spec sheet for 4430's says 300 wpc pink noise. Taking into cosideration that an under powered amp will more than likely burn up your HF drivers when listening at loud volume levels, due to clipping (distortion), it's better to have an amp that has plenty of headroom above rated power....and most manufacturers including JBL recommend 3-6 dB amp headroom. What does this mean? Every increase of 3dB is equivalent to doubling the power. So...Since the 4430 is rated at 300 watts pink noise you can use an amp that has anywhere from 300 to 1200 watts per channel to drive them. Clean power is the key to great dynamics and transient response....it's not the purpose to fry your ears, although some might... given the opportunity.

I think you'd be way happy with 300-400 watts.

Thanks,

Edgewound

[JBLnsince1959]

I think you'd be way happy with 300-400 watts.

Thanks,

Edgewound

I agree... I used 200 to 400 watts bi-amped to each, and 400 watts when using the internal crossover. It's not the volumn you want to go for ( we all want to keep our hearing), but the headroom.

[JBLnsince1959]

Ok, let me be more clear. When Bi-amping I used 200 watts to the horn and 400 watts to the "bass"

[Zilch]

When biamping (which is nearly always, now), I use amps 75W (per channel) to horns and 150W to bass. 6200 Series amps probably have twice that in built-in headroom. Driving them with consumer level CD players, it's probably not possible to get them to even half their ratings.

That calculator says I'm pushing about 5 watts here.

Mr. Widget's running his vented Sub1500's in stereo on one of my 6260's and says he's never seen the clip light come on. That'd be 300W per channel into 4 Ohms.

I think I once saw the clip lights, showin' off how a pair of B460's could rattle the ceiling with subsonics. This contingent does not subscribe to mega-amp mania....

["Duke" Spinner]

well ...i run 1-5watts w/ my Klipsch speakers w/ 225/ ch.

my L-7's want more juice ..10-30 watts ...have sometimes driven amp to clip, tryin to keep up with the Cornwalls

i just want adaquate headroom ...

[JBLnsince1959]

Just to add some more numbers here.


when I had my MAC 402 hooked up, comfortable listening was around 0.4 to 1 watt

4 watts was ready pushing it for long term listening ( in my room, you're milage may vary). I also had a MAC 75 watt receiver hooked up and it was about the same ( couldn't do the big bass stuff tho)

[JBLGUY]

Well

! use

75 watts for tweeters
75 watts for upper mids
75 watts for lower mids
360 watts for bass
400 watts for subs

So about a 1000 wats per channel

And only use about .5 watts at normal listening level. the lights on the DSC 280 won't even come

[Don Mascali]

And only use about .5 watts at normal listening level. the lights on the DSC 280 won't even come

I agree, even though my system is capable of physical damage to the body I seldom listen above 90-95db avg for any length of time.

It is the headroom that makes the difference.

I have a set of L100t3s in my living room and thought the bass sounded "tubby". When I moved one of my Yamaha P5000 amps (500wpc) up there, those 2214s started making music.

Get more than you think you need, your speakers will thank you for it.

I have a 1990 Corvette that will do 160mph. that doesn't mean I drive that speed often.

[Robh3606]

Hello Duke

You doing HT with the magic 105dB number??? That the THX spec for minimum max SPL on peaks?? Remember you have a pair so subtract 3dB or 1/2 what the calculator is giving you. If you are going HT you also have a center channel which does most of the work. 3-400 watts should be more than enough.

Rob

[Robh3606]

Yeah most are you know one for inside??

http://www.doctorproaudio.com/doctor...n.htm#calc_spl

That's the one I use.

Rob

[Baron030]

Well, as a new member of the 1KW per channel club.

I just want to say thanks for the tracking down that calculator.
Now I know just how dangerous my new system really is.