Hk 635 Avr

AndyGwis

Yeah, I don't remember seeing any 4ohm specs, so you should probably call them or shoot HK an email just to be sure.

jakelm

Thanks Andy

jakelm

Ok I emailed them ..and this is the responce I got:

Jake,
Good afternoon. The AVR635, as with all of the HK receivers, are designed to work best with speakers having an 8 ohm impedance. This does not mean that they have not been tested at lower impedances. This means that the receivers will perform their best when the proper impedance is used. We do not have any specifications on how much power will be provided at these lower impedances, as we do not recommend that any other speakers be connected.


They do not recommend that any other speakers (becides 8ohm speakers) be connected. HMMMMM....A reciever with a MSRP for $1300 and I cant use speakers under 8 ohms? Lets see, that rulles out my vintage 7's, lsi9's, lsi7.etc... I was also hoping for wattage ratings at 6 and 4 ohms.

The reason I sound so uneasy is because in a previous email, they told me that if for some reason my reciever goes out because of running speakers with lower ohms than recommended, it would not be warrantied. Maybe I'm jumping to conclusions too fast.

Any comments on how I should take this email responce?

Jake

jakelm

Even my $299 Onkyo had specs for 8, 6 and 3ohms.

Jake

Ron Temple

I doubt the receiver struggles with 6 ohm and even 4 ohm at reasonable levels...don't know about dropping to 3 ohm nominal and less. That's amp territory.

jakelm

He just emailed me back, I think I upset him. I didnt mean to do that. But he did explain that H/K will handle 4-8ohms. H/K just doesnt post the specs for the lower impedences. And wont cover the damage if you over drive it with lower ohms.

I'm just alittle dissapointed that H/K doesnt feel they need to post specs of lower ohms. The top 5 of Polk's line are 4ohm speakers. But for a (IMO) higher end reciever (like the 635), you cant get specs, if driving these speakers.

I guess self testing is the only way to go in this situation.

Jake

Ron Temple

I listened to a 330 driving some 4 ohm GR Research AV-2s for several hours at significant volume (2 channel/small/cut at 80hz w/sub and large w/o). It didn't raise a sweat. I think your safe running 4 ohms with the 635, but dipping below 3 driving 4 drivers, 4 PRs and a couple of tweets, would make me nervous.

jakelm

Well...with stacked 6ohm Polk M7's, I'll be at approx 3.4ohms. If something happends, you'll be the first to know. And I dont baby my electronics. Especially with movies.

Jake

AndyGwis

Yeah, let me know if they blow up the 635 or not. If so, I'll be sure not to run my Thiel's on 7Bs on then.

I'd guess it would be fine, though. The 635 boasts high current rating, and I would think it pushes a good 125-150 WPC into 4 ohms. . . just based on their conservative ratings, hearty power supply, and aforementioned current capability.

jakelm

Wow,,,I have been tinkering with this for days now. Sounds absolutly fantastic. One question. Is there any way to force EX or seven channel? I have "last" set in OSD. Watching a movie on cable, I put it on Pllx with surround back, but when I pause the movie or FF, it always switches to Pll ex-off. I was able, on my Onkyo, to force the surround back channel to be used no matter what. I remember it was an option. "Auto" or "on". But I cant figure out how to do this on my H/K. Everytime it swtches back I just press Dolby again and I'm back to "ex". Is there anyway around this?

Any ideas?

Jake

AndyGwis

If no one here responds with an answer, get on that AVS forum 635 thread and post it there. It may have already been covered somewhere in the 30+ page discussion, you can try to search for it.

Ron Temple

I think this was one of the "quirks" that the firmware update last year was supposed to address. PM M Code...I'm running 5.1 and my unit auto detects DD as the default going to DOLIIx for any 2 channel source. I can change this to Logic 7 and have done so, but I find it's just too much bother and leave it alone.

Now if I were running surround backs, it probably wouldn't work for me

jakelm

I did Ron... They cover only how to switch it from going back (default) to logic 7. Not how to keep it ex or 7 channel Pll.
But thanks..

Jake

Edit: Im sorry Andy I ment you. I did read the whole thread.

jakelm

Hey Ron.. you or someone might know....why doesnt DTS (Neo 6) work for optic or coaxal digital? Why only Pll or logic 7?
Also I dont know if its just me or is there way too much midbass in logic7? Sounds terrible. And Pll is too bright. I'm trying to find a happy medium.

Jake

jakelm

But it is frustrating having to keep hitting Dolby to get it back to Pllx 7 channel, after pausing or FF cable or DVD.

It doesnt change from Dobly or any setting I have, it just keeps turning my surround back channels off. And then I press Dolby again and Im right back with surround back on.

jakelm

Oh...and by the way....(I'm sorry I'm draging this thread on, I know you all must be tired of me)...but M Code has his Pm's off.

jakelm

Andy I need your help here..if you have a minute. I sent an email to H/K and I submited a post in avs forum, but you or someone might know.

I have noticed for a while now, that my vocals are muffled (remember me saying how I noticed alot of midbass?). Last night I took some time to try to fix this. I noticed when approching the front that I was getting vocal audio (100+hz) from my subs. I checked my setting : Front main 60hz, C,SL,SR,SBL,SBR @80hz. Sub 80hz set to 12". Subwoofer preout to amp via splitter. Amp to subs in correct phase. So everything is correct. I put in DVE disk and ran a Fr sweep for sub (18-140hz). I noticed something funny, so I broke out the ratshack meter. I found a +/-4dbs all the way up to 130hz, then sloped off. I did a reset and set all my speakers the same way except for the sub which I put it @60hz. I re-ran the EZEq again in manual mode. Ran the disk again and had the same data, a very audilble sweep up to approx 130hz. Then only higher than approx 130hz would the subs cool off.

Is there something I'm doing wrong? Its like the reciever is stuck in 120hz crossover mode.

Jake

AndyGwis

Man, no clue. I'm starting to think I need to go buy a spl meter and see if I have similar results. But, seems to my ears like all of my speakers do what they are set to do. . .

Is there a high frequency crossover on the sub you can set as well? You shouldn't have to, but maybe put it on 60 or 80 and do you avia/spl meter test.

Yeah, sounds like the HK isn't rolling off the sub when it should. . . maybe not rolling it off at all.

Try the subs crossover/rolloff and let me know.

jakelm

I have my Hafler amp driving these subs, so no crossover on the amp. But yes it does seem like the Hk is not rolling off the Fr at the right point. Its almost (like you said) not rolling it off at all. It doesnt matter what setting I have it on 60 or 80hz, I still get a smooth sweep all the way to 130hz and then after 130 the subs start to roll off. When set to 60hz, I should get little to no sound other than deep bass from the subs. I had this same set up with my older Onkyo 502, and no problems. I dont know.

Jake

jakelm

I recieved an email from HK last night:

Good evening and thanks for your inquiry. What you are experiencing is localization of the subwoofer even though the crossover is at the point where it should be omni directional in response mode. The crossover slope for the low pass filter in the AVR 635 is 12dB/oct so if your subwoofer is too close to you in distance it is certainly possible that there could be voices from the sub. As a suggestion, try moving the subs to both adjacent corners in the front of the room. This should change the localization and allow the subwoofers to blend seamlessly with your front L&R speakers.

I replyed say that my room is 20 x 16 with the mains, tv and subs along the 16' front stage wall. I sit about 15-17' from the front stage wall. The subs are in each a corner. I also mentioned that I am getting a db spike between 95 and 105hz. If my crossover was set to 60hz, I should not get any type of spike around that Fr. Right? Even with a slow 12dbs roll off, setting the crossover to 60hz, I should get no responce from my subs @ around 80-90hz, I am correct right?

I just want to make sure I'm understanding him correctly.

Jake

P.S Here is a diagram of my living room. I thought this was the best speaker placement.