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Discussion Starter #1
I'm being told that the K2s I own will not play much lower than 20HZ? Can they be modified to play lower frequencies?

what other amps play lower than the K2s and why is that? I dont see any OEMs specs showing their products go below 20HZ.
 

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Crown specs are guaranteed MINIMUMS.

Unlike other companies who inflate their specs and claim lots of things that may or may not be achievable, Crown takes the opposite approach and states specs that the units are guaranteed to exceed - even after 3 years of constant and continuous professional (commercial) use at full power.

And they state the frequency response for the K2 as :

±0.25 dB from 20 Hz to 20 kHz.Frequency Response: ±0.25 dB from 20 Hz to 20 kHz.
The frequency response is band limited with an 8 Hz double-integrated 3rd-order Butterworth high-pass filter and a 30 kHz 7th-order Gaussian low-pass filter.




I am curious as to who the source of the claims are that you cite, and upon what they base their opinion.

I am aware of MANY installations where K1s and K2s are used to drive subwoofers, including units that extend well below 20 Hz, including Danley subs that feature real extension below 20 Hz with absolutely no problems.

Just be aware, there may be slightly greater variance than the MAXIMUM .25 dB allowed over the remainder of the stated passband. Realizing, of course, that you are constrained to listening to material above 8 Hz, which I can easily see could be quite a limitation. :D

If continuous performance below 8 Hz or above 30 kHz is required, you might want to examine another amp. And if you can find another that exceeds the performance capabilities of the K series, short of the Macrotechs or iSeries, (especially if it is passively cooled!) please let us know.
 

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Discussion Starter #3
Actualy it was a couple of users here on another thread I have going that suggested using Behringer amps instead because they said they play lower in frequency, and my K2s are bandwidth limited for driving true sub harmonic frequencies.

I have seen really poor quality from Behringer amps with poor support from Behringer as well with getting spare parts. I'd hate to get rid of my excellent quality Crowns for Behringer amps that are junk.

Thanks for the input.

Regards,
Bill
 

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Behringer versus a Crown K series amp???

:D

Thank you! You literally made my morning!

...and if you decide to dump those 'lousy' K2s, Please PM me!
 

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[/URL] Uploaded with ImageShack.us[/IMG]

I made this ~a year ago, it is a calibrated sweep of a crown k2 amplifier; If memory serves me correctly, there is a high pass filter at 8hz and a lowpass at 32khz (it is in the k2 documentation on their website)...
it is ~1.7 db down at 8 hz, so it will definitely work well at 10 :)

it is 10 db down at 4.88 hz :)

Edit/addition:
lab gruppens go to 1.5 hz (their filter is at 1.5 hz)
http://www.avsforum.com/avs-vb/showthread.php?p=17429557#post17429557
 

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Elite Shackster
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I'm being told that the K2s I own will not play much lower than 20HZ? Can they be modified to play lower frequencies?

what other amps play lower than the K2s and why is that? I dont see any OEMs specs showing their products go below 20HZ.
Just to be clear, I only stipulated you double check :T I know someone who ran a crown amp that wouldnt play below 20hz well, but I dont know if it was a K2 or not. Looking at the responses, I'm gonna guess not lol.
 

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Discussion Starter #7
Guys,

This is all GREAT news to me. I'm really into keeping my 2 Ks as I know they are amazing amps. I've even run them on my mains as 2 channel amps and they even sound good in that application, and yes, ZERO fan noise cause no fans! :bigsmile:
 

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Actualy it was a couple of users here on another thread I have going that suggested using Behringer amps instead because they said they play lower in frequency, and my K2s are bandwidth limited for driving true sub harmonic frequencies.

I have seen really poor quality from Behringer amps with poor support from Behringer as well with getting spare parts. I'd hate to get rid of my excellent quality Crowns for Behringer amps that are junk.

Thanks for the input.

Regards,
Bill
K2s are fine amps but if someone needs 2000Watts of power then the Behringers are just as good. There isnt a measurement or a controlled tested that proves there is any difference when driving incredible subs to insane levels.

I have had them all too, crest, crown, behringer, QSC. Right now, I have twin LMS5400s and I have no concerns about using EP2500s if I only needed 2000Watts. I want 4000Watts each though!!

Again, K2s are great and not having a fan is awesome but all fans are easily modded and in our environments there isnt going to be any heat issues.
 

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Discussion Starter #10
I agree that Behringer power is good, thats if it works! There is no comparrison to Crown's quality or customer support. I currently have 3 Crown K2s that are over 6 years old and never had a problem. My buddy has a 3 year old Behringer Europower 1500 and the power switch broke while being used in an easy home enviroment application....and we've been trying for 2 weeks to get another switch for it through their authorized repair centers and no luck at all, they all tell us Behringer is a terrible company to deal with and have many many issues. Good luck with your Behringer stuff.
 

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Elite Shackster
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I have to agree with Behringer customer service, its like there is no one there if your trying to contact them. I think the company is just that big they probably ignore anything minor, which is horrible to have to deal with for sure.

Ive not had any issues with anything breaking though, and Ive used and known other people use quite a few Europower amps. That said, I never used the power switch on the amp itself, I always turned it on and off at the wall.
 

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I can confirm those measurements as the ones I had taken were the same. Be careful of measuring the K2 as there is the standby feature which kicks in after 6 seconds or so. If it is in standby when you take the measurements it does look quite weird.

[/URL] Uploaded with ImageShack.us[/IMG]

I made this ~a year ago, it is a calibrated sweep of a crown k2 amplifier; If memory serves me correctly, there is a high pass filter at 8hz and a lowpass at 32khz (it is in the k2 documentation on their website)...
it is ~1.7 db down at 8 hz, so it will definitely work well at 10 :)

it is 10 db down at 4.88 hz :)

Edit/addition:
lab gruppens go to 1.5 hz (their filter is at 1.5 hz)
http://www.avsforum.com/avs-vb/showthread.php?p=17429557#post17429557
 

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There is a way to either disable the standby feature (there is a jumper on the input board [inside the amp]) which can be triggered that will keep it from shutting off at all, you can also change a resistor (z1 i believe) to 1 megaohm which will make the timout ~1 min as opposed to 6 sec.
 
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