Hi,

Within a couple of days I will receive the KA-1000 to give my two KW-120's some power. I already took a look in the online manual of the KA-1000 but it gave me some questions after reading it. I've got a XLR and a RCA possibility on the Onkyo (as you can see in the picture below). I'm know using the XLR's in combination with Crowns XTI for the speakers. For the subs I would like to use the RCA connection.

My question is; in the manual is written; Use a shielded, high quality subwoofer interconnect cable of appropriate length with RCA plugs on each end. Figure 2 in the manual shows an optional "Y" jack connection. Why is this and do I need to make this "Y" connection? Is a subwoofer cable sufficient with 1 RCA at each end of the cable or is it better to have a cable with 1 RCA at one end and 2 RCA's at the other end?

Dave

Hi thaddeussmith,

Tanks for your reply

So you would put a splitter on the L and the R RCA input and use 1 single subcable from the splitter to the Onkyo? Is this to use the subs as L & R subs because I don't want that. I would like both subs to work as one if that's possible.

Dave

Thanks anyway thaddeussmith. I appreciate it.

Anyone who knows how-to. I would hate to mess up my subs or KA-1000 because of a bad connection.

Dave

You can' t mess up the KA-1000

the 1000's inputs are there for running R & L signal to the sub.

THe amp is mono only. If you use the "Y" adaptor, you will get about 6db more signal to the amp.

It will take 700mV of input to run the sub amp to full output.

In THX mode it will take 3 V to get the sub to full output.

BTW: full output is about 67 Volts.

Hi Trey,

Thanks for your answer. The mV is a bit abracadabra for me .

How would you hook up the 2 KW-120's to the KA-1000 when you want to use them as 1 big sub?

Dave

Each sub cabinet comes with a wire to connect it to the amp.

You connect the sub out from the receiver to the amp line in (R & L, or Just R or Just L) then connect each speaker wire to the amp and to each of the subs.

All done.

They act like "one" sub connected this way.

Great. One subwoofer cable will do the trick then.

When  using a "Y" addapter you place it at the back of the sub amp. One cable from the receiver to the "Y" then the to the sub amp.

Today the KA-1000 was delivered. I'm a happy man .

I bought the Monster M1000 SW. It's almost a shame to connect it and not see it. It's a beauty to look at.

This weekend I will try with and without the "Y" adadpter. Now the sub cable is connected without.

Some pics I hope you guys will appreciate.

 I love mine. You will too.

The key to what Trey has said if I can malke it simple.

If you do not have a THX Ultra 2 pre amp, do NOT run it in THX mode.

That should keep the record straight.

Those with Sunfire pre amps will need a boost of some type.   Look below to see what I did in my signature.  It is amazing now..

First of all I must say that the KW-120 with the KA-1000 is a killer combination. The whole surround soundpicture looks upgraded. Maybe it's in my mind but a really hear it that way. Even the news on tv is very nice to listen to .

The Onkyo PR-SC886 is a THX Ultra2 Plus pre amp. At this moment I'm not running in THX mode but reading your answer I should run it.

I'm still trying to find out what the best settings are and with the KA-1000 it's not a punishment to do.

Indy, you have a very awesome set! Do you have a link with some pics? I would love to see some.

What did that SMS-1 for your subs and would you buy it at this moment when you didn't have it? I know it's on the market for a long time now so that's the reason I'm asking.

Thanks, Dave 

After running the THX mode I don't have the punch that I had when I was not running the THX mode.

All speakers in the dB configuration are around 0dB (measured with a dB meter). I now raised the sub dB to +10 but I still don't get that nice punchy feeling. What am I doing wrong and why can't I boost the signal with the Onkyo?

My feeling is to get back to not running the THX mode but regarding to the manual as Indy I'm confused.

THX mode = no volume control, no filter and takes 3 volts to drive it to max output of 66 volts.

NON-THX mode = all controls work, the filter blocks 120 Hz and up unless set to a lower value. and only takes 0.75 volts to drive it to max output of 66 volts.

I tell eveyone to use NON - THX mode.