[Lupo]

I know some here use the K2 as a sub amp and I have a question.  My receiver only has an RCA out (LFE channel) so I'm looking to get a XLR to RCA converter. Will I have issues with the input sensitivity of the K2 not matching my receivers? Will I need a special kind of voltage converter?

Thx
Lupo

[Marbles]

Actually it will be a lot cheaper to get a regular RCA to RCA interconnect and go down to Radio shack and get a RCA to 1/4" adapter.

You should have no problems.

[Lupo]

Got it, thanks, definitely much easier.

As for the input sensitivity on the K2, do I set it to 1.4V (33 db gain) or fixed voltage gain of 26 db?

[Marbles]

Got it, thanks, definitely much easier.

As for the input sensitivity on the K2, do I set it to 1.4V (33 db gain) or fixed voltage gain of 26 db?

I don't remember     I'll have to look it up when I get home in a few hours and repost.

[Marbles]

mines on 1.4v

[Lupo]

Hey Marbles thank you very much for the feedback. I picked up the RCA to 1/4" phono plug, got away wuth it with 4 bucks!

[Marbles]

Congrats!  

Let me know what you think when everythings up and running.

[Lupo]

Marbles did you have any issues with the K2 going into "sleep mode" when there's low or no signal on the input and taking several seconds to "wake up"? I'd imagime this might be a problem if the subwoofer xover is low.

I've read there's a modification for this but not supported by Crown meaning kiss the warranty goodbye.

[Marbles]

Several seconds??? no, mine comes on instantly.

I had the same reservations as you, but I only use mine for HT (not 2 channel) and concert DVD's.

Does yours take 30 seconds to go to sleep, or 8 seconds?

The older ones took 8 seconds.  The factory will upgrade yours to 30 seconds if you wish, any more than that and they claim they will run too hot.

Mine has the 8 second sleep mode and I have never had a problem with mine not coming out of sleep immeadiately.

Try it and see.

Your worries are much ado about nothing.

How does yours sound so far?
What is the rest of your system?

[Lupo]

Actually I don't have the Crown yet. I ordered it brand new yesterday, $1349 delivered. It will take a week to arrive. I looked for a used one on eBay but all of them were over 3 years old and out of warranty and wen t for $850 and above so I decided to shell out the extra dough and get a new one. The K2 will drive a VMPS larger w/megawoofers. Still contemplating whether I should drive each woofer separately with 500W/channel or dump 2500W bridged mono on the whole thing and see what happens .

For the time being I'm feeding the VMPS from the pre-out of an HK AVR310 receiver I use as a processor and xover at 100 Hz using an old POS Carver.  . Eventually I'll move the xover down to 80 Hz when I get new mains-definitely not full range though, I like the VMPS doing the nasty down low!

As for the Crown K2, I guess mine will come with the 30 second sleep delay so hopefully that will do the trick. If the xover was really low it could become an issue for classical music but at 80 Hz I should be OK.

[Lupo]

I called Crown tech support and got the following info in case anyone else is considering the K2.
The new units have a 58 second sleep-mode delay meaning that the amp will enter sleep mode after 58 secs of no-signal. However the amp takes only 2.5 ms to wake up so it should be a non-issue.
Regarding the input sensitivity, the K2 is expecting a 1.4 V input. Consumer gear  feeds less than half of that something like .6V I think. The Crown tech said that while it will still work, you won't be able to take advantage of the amp's full potential unless you boost the signal. He reccomended this product:

http://www.bhphotovideo.com/bnh/controller/home?A=getItemDetail&kw=ROMB15&is=REG&Q=&O=&sku=217366