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[Felix Truong]

I was looking at the JTR site and it says now thru Apr 1st, the JTR Growlers are $799 and can handle 2,000 watts RMS?  So does that mean I can run 4,000 watts program into one cab and not blow them up?  Seems a bit... off to me?

Anyone with input on this?

[Art Welter]

Felix Truong wrote on Wed, 10 March 2010 05:28

I was looking at the JTR site and it says now thru Apr 1st, the JTR Growlers are $799 and can handle 2,000 watts RMS?  So does that mean I can run 4,000 watts program into one cab and not blow them up?  Seems a bit... off to me? Anyone with input on this?

Felix,

You have misread the specs.

The Growler specifications don’t include the RMS rating of the speaker, they mention the maximum recommended amp for the Growler is up to 2000 watts RMS, which is 33 dB more than one watt.
They also say "peak power is double but not recommended."
That is a rather ambiguous statement, Jeff probably means a 4Kwatt peak may leave a hole where the cone was, depending on frequency and duration.

The speaker's voice coil  probably handles around 500 watts RMS, capable of 6 dB peaks (2000 watts).

I’m sure Jeff Permian (Mr. Growler) would be glad to answer specific questions.



Art Welter

[Phil Lewandowski]

Hey Felix,


Art is correct, Jeff recommends an amp capable of about 2000 watts into 8 ohms for the new driver.

The last time I talked to Jeff P. he was leading on that the new driver would have an "RMS" rating about somewhere between 1400-1600 watts.  (As the old driver was rated for 800 RMS and he recommended about 1000 watts)


A Crown IT8000 or QSC PL380 seems like they could do a good job powering them.

Take Care!
Phil

[Felix Truong]

Interesting.  

In terms of output, the growlers used to trail the UCS1's by a tiny bit according to the maryland shootout.  I wonder how they are now with the new drivers..

[Art Welter]

Oops, to late to edit the misspelling of Jeff Permanian's name.

[Jeff Permanian]

Art Welter wrote on Wed, 10 March 2010 14:43

Felix, The speaker's voice coil  probably handles around 500 watts RMS, capable of 6 dB peaks (2000 watts). Art Welter

Even the previous model was more capable than that

The new driver has 23mm of xmax (eachway, 46mm total linear) and nearly 3" peak to peak mechanical travel.

[Jeff Permanian]

Phil Lewandowski wrote on Wed, 10 March 2010 15:51

A Crown IT8000 or QSC PL380 seems like they could do a good job powering them. Take Care! Phil

There are a lot of amplifiers capable of 4000 watts into 4 ohms bridged on the market which will work out great to power a pair of the new Growlers.

[Art Welter]

Jeff Permanian wrote on Fri, 12 March 2010 10:59

Art Welter wrote on Wed, 10 March 2010 14:43 Felix, The speaker's voice coil  probably handles around 500 watts RMS, capable of 6 dB peaks (2000 watts). Art Welter Even the previous model was more capable than that The new driver has 23mm of xmax (eachway, 46mm total linear) and nearly 3" peak to peak mechanical travel.

Jeff,

How many watts of say a 60 Hz sine wave is the new speaker capable of ?

Do you have any comparative graphs of the previous model compared to the new?

How does the power compression compare with the previous model?

Art Welter

[Jeff Permanian]

126.5 volt (2000w at 8ohm), logarithmic, sine wave sweep with 3db of compression.

Frequency response is unchanged.

New Growlers handles double the power of the previous.

The Triple 8X handles 69.28 volt (1200w at 4 ohm), logarithmic, sine wave sweep with 3db of compression.

JTR builds speakers for real world use NOT just pretty 1w/1m measurements and thermo capacity.

Where does a vented speaker's low end come from?

The ports. The Triples cabinetry is extremely complex because of its huge slot ports (equal to 6x 3" ports) and that amount of port area is absolutely necessary. I laugh when I see everyone little tiny ports because I know they will start compressing with only a couple hundred watts. Same principles apply to throat area and xmax. The louder, the more cone movement, the more xmax required.

[Evan Kirkendall]

So, you have to feed them more power to get the same results as before? Or is there anymore extra output gained here?

Looking at your specs, seems as if you gain maybe a dB...

Why is everyone playing the "our drivers can handle more power, but no increased performance" game? I like the "if you give our speakers 1200 watts, you get more SPL then you'll ever need!" game...


Evan