LSi25 Home Theater Setup

sxt55

I just purchased the following Home theater configuration and have a question as to the Speaker setup. The system consists of an Onkyo SR602, Lsi25 Fronts, an LsiC Center and a pair of LC65i's for rears.

I currently have the Subwoofer = YES (Y-cable from Pre-Out Sub Woofer to each LSi25 Sub) and the Front, Center and Surrounds as SMALL with the Xover at 100Hz. The documentation isn't very clear as to how the subwoofer is connected in the LSi25.

I am not sure/convinced if receiver power is an issue because I did have the problem of the receiver shutting down into Safe Mode when there was alot of bass such a an explosion on HT.

Any assistance/suggestions on the configuration would be greatly appreciated.

wingnut4772

Power could definitely be an issue as the Onkyo is only rated at 6 Ohms for a speaker load and your LSIs are 4 ohm. If you like to listen to your movies loudly you could be overtaxing your Onkyo-unless I missed something and you already have added an amp.

unc2701

You've got your setup right as long as you're going into the LFE in on the 25's... The onk's Sub output is filtered. You really need a seperate power amp for the 25's, though- raising the crossover a little more might get you more volume before the safe mode kicks in, but it'll also make the subs sound boomy. The only other thing you can do is make sure the onk has plenty of room to breathe- usually it's a thermal switch that kicks the amp into safe mode first.

sxt55

Thanks for your feedback. Are you saying that I may need a seperate amp for the Lsi's in addition to the SR602? If so, perhaps the SR602 was not the correct decision? I can probably return the receiver within the next week or so to either get the SR702 or whatever may be recommended. There are times when I like to listen to the HT at a higher volume so I want to make sure I can do that. Thanks

Frank Z

There are very few receivers on the market that will adequately drive your LSi's and bring out their full potential. The Sunfire Ultimate Receiver is one to consider if you really want to stick with a receiver.

Seperate pre-amp and amp combos are a better option, but of course your budget will dictate what will and will not make the cut. Take a look at Adcom, NAD, and of course, Outlaw. you don't have to spend a fortune on seperates to get amazing performance from your speakers.

ezc

I agree you need much more power & current. I have 15's & were driving them with a Onk 595 which is a older version of the 602, the 595 has a switch for above 6ohm & below 6ohm. even set to below 6ohm it didnt sound good, settings were speaker large 80x over. I purchased a Rotel rsx 1065 which was reccomended by members here & that made a huge difference in sound & dynamics. Recently I purchased a BAT VK60 tube amp for my front mains(15's) & another huge improvement. I use the rotel as a pre or the front main chanels & the receiver handles the center & surrounds. The LSi need power to be driven well. I have even added additional dedicated circuits for the amp, receiver, & sources. again noticable improvement.