Harman Kardon AVR 7550HD (2008 announcement) - Page 22 - AVS Forum
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post #631 of 1592 Old 02-27-2011, 10:58 PM
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Hey same issue with the fan it comes on no matter what wtf. And the reciever should not have to rely on a fan at all times. Only when it is being pushed very hard or was running all day at high volumes.

And is it just me or does anyone else think this but im really starting to notice i don't have good surround sound with this reciever it seems like everything is kinda mixed together or another way to explain it would be to say i feel it doesn't have much presence for movies. My 4308 has way better channel seperation and more open sound and better detail not so closed in like the 7550 maybe it has something to do with AL 24 PROCESSING. And this fan thing is really starting to suck that's what i like about the 4308 i don't have fan noise cause it has a special airflow system that doesn't require a fan.

And i know this reciever has more power than my 635 but im starting to think that it doesn't have the clarity of my 635.

I actually put my denon 4308ci back in and it seems so much more refined. I guess ill have to do some more tweaking to the 7550 before i decide to return it. But the point being when getting a new reciever i shouldn't be putting my old reciever back in.

Maybe im not giving the 7550 a fair chance after all i only had it for two days. Im going to try to spend more time setting it up and ill post back my findings.
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post #632 of 1592 Old 02-28-2011, 04:40 AM - Thread Starter
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Speaker king. Just wanted to make sure you did not reverse the polarity if any speakers. I did not get a chance to play with anything last night. I wont get a chance to anytime soon. My wife is in labor!
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post #633 of 1592 Old 02-28-2011, 10:35 AM
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Quote:
Originally Posted by bommai View Post

Speaker king. Just wanted to make sure you did not reverse the polarity if any speakers. I did not get a chance to play with anything last night. I wont get a chance to anytime soon. My wife is in labor!

No i didn't reverese the polarity.
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post #634 of 1592 Old 02-28-2011, 03:31 PM
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I had written earlier about this fan issue and it coming on 15 minutes after turning it on without starting to use it but just in standby. I bought a seven channel amp and hooked it up. The main fan does not come anymore but the dsp board fan does. M code talked about some units having some biasing issues and maybe these units are biased toward class A and run warm, but the fan does run quite a bit. If you look at all the recievers now they have fans, including the 4311 from Denon, nice the 4308 does not as the fan noise annoys me, hence buying a separate amp, but still having fan noise.
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post #635 of 1592 Old 02-28-2011, 03:44 PM
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Originally Posted by christmclean View Post

I had written earlier about this fan issue and it coming on 15 minutes after turning it on without starting to use it but just in standby. I bought a seven channel amp and hooked it up. The main fan does not come anymore but the dsp board fan does. M code talked about some units having some biasing issues and maybe these units are biased toward class A and run warm, but the fan does run quite a bit. If you look at all the recievers now they have fans, including the 4311 from Denon, nice the 4308 does not as the fan noise annoys me, hence buying a separate amp, but still having fan noise.

Does the fan come on even if the video processor is off ?
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post #636 of 1592 Old 02-28-2011, 04:26 PM - Thread Starter
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How does the 7550HD know that it is hooked up to an amp - just because something is plugged into its pre-outs. For me, the main fan that blows hot air out of the back of the unit came on by itself even though I was not even playing anything. It was quite loud. Is this a firmware issue or a hardware problem?
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post #637 of 1592 Old 02-28-2011, 04:30 PM - Thread Starter
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I don't think I will be able to test out my 7550HD any time soon. My wife and I just had a baby girl! Priorities have changed!
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post #638 of 1592 Old 02-28-2011, 04:58 PM
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Ok guys i finally set up the 7550 and the sound is much improved. The one thing i will say if your gonna use bass management make sure under each input that you use you turn tone controls to on and under ez set make sure it says sub not sub(L+R).
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post #639 of 1592 Old 02-28-2011, 05:03 PM
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Quote:
Originally Posted by M Code View Post

What many people don't know is that the 7550HD actually used some of the key components from the Lexicon RV8..

Many people would still like to know a bit more about this.

just my $0.02
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post #640 of 1592 Old 02-28-2011, 05:06 PM
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Quote:
Originally Posted by bommai View Post

I don't think I will be able to test out my 7550HD any time soon. My wife and I just had a baby girl! Priorities have changed!

Congratulations!

I would say though that with a baby girl you will spend more time at home and what better to there than play around a bit with the 7550HD when the baby is finally sleeping
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post #641 of 1592 Old 02-28-2011, 05:08 PM - Thread Starter
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Quote:
Originally Posted by speaker king View Post

Ok guys i finally set up the 7550 and the sound is much improved. The one thing i will say if your gonna use bass management make sure under each input that you use you turn tone controls to on and under ez set make sure it says sub not sub(L+R).

When I setup mine, with small speakers the sub was set to lfe + l/r and could not be changed. That seemed odd. With large speakers, it came to the same value bit I could change it to just lfe or even none. I need to check if tone control affects eq or not. Weird. Regardless shouldn't the receiver sound good even without any eq?
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post #642 of 1592 Old 02-28-2011, 05:33 PM
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Quote:
Originally Posted by bommai View Post

When I setup mine, with small speakers the sub was set to lfe + l/r and could not be changed. That seemed odd. With large speakers, it came to the same value bit I could change it to just lfe or even none. I need to check if tone control affects eq or not. Weird. Regardless shouldn't the receiver sound good even without any eq?

This is confusing. If you need to do this manually what should we change.

Option1:

- Set small even for full range speakers
and set sub to LFE?
- Set the LFE LP FLT to 80 hz

Option 2:

- Set large for full range speaker
- Set sub to LFE+l/r or should this be lfe only?
- Set the LFE LP FLT to 80 hz

Sorry folks I haven't bought yet the 7550HD and talking in context of 745/645
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post #643 of 1592 Old 02-28-2011, 05:39 PM
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Originally Posted by bommai View Post

I don't think I will be able to test out my 7550HD any time soon. My wife and I just had a baby girl! Priorities have changed!

Congrats on the new born!!
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post #644 of 1592 Old 02-28-2011, 06:07 PM
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The dsp fan still comes on even with bluray and unit set to pass through video so I don't know if it can be turned off. I have thought about opening the case and pulling the power from the fan or replacing with a quieter one but have not done it.

The dsp might be only fan that comes on when idle, can't remember but I think so. The unit definetly get louder when the main fan comes on but can't remember from before I connected the amp.
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post #645 of 1592 Old 02-28-2011, 06:52 PM
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Quote:
Originally Posted by M Code View Post

What many people don't know is that the 7550HD actually used some of the key components from the Lexicon RV8..

I thought it was more than that, i.e. essentially the same guts in a Lexicon case.

Noah
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post #646 of 1592 Old 02-28-2011, 07:08 PM
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Quote:
Originally Posted by bommai View Post

How does the 7550HD know that it is hooked up to an amp - just because something is plugged into its pre-outs. For me, the main fan that blows hot air out of the back of the unit came on by itself even though I was not even playing anything. It was quite loud. Is this a firmware issue or a hardware problem?

Even with nothing connected, the system's main amps will be idling which causes some heat build up.


Do you have your 7550 in a console or cabinet? Mine is very open on all sides, if the fan is coming on during the light use I've been putting it through - I can't even hear it. However, I do have a Comcast/Motorola DCX cable box directly next to it whose fan runs continuously, and is probably drowning the noise out.

Quote:
Originally Posted by bommai View Post

I don't think I will be able to test out my 7550HD any time soon. My wife and I just had a baby girl! Priorities have changed!

Congrats!

Quote:
Originally Posted by noah katz View Post

Quote:
Originally Posted by M Code View Post

What many people don't know is that the 7550HD actually used some of the key components from the Lexicon RV8..

I thought it was more than that, i.e. essentially the same guts in a Lexicon case.

I think you are thinking of the Lexicon RV-5, which was based of the HK AVR 745 (but with some slight changes, including a beefier toroidal power supply)
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post #647 of 1592 Old 03-01-2011, 12:28 AM
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When I got home I lowered the shelf about 1 ½” to give my AVR more clearance (even though the old unit worked fine without it). While I was at it I drilled a couple holes in the back of the cabinet to reroute the 3 HDMI cables and 2 CAT-5 cables through the back of it instead of out one side then in the other. This made it look cleaner in the back and made a little less blockage of airflow.


I got it all back together, setup the speakers and video bypass on my 3D Blue-ray and DVR. It ran great for 30 minutes then the sound went out again. I had felt the 120mm fan in the back and the flow did seem kind of weak. Now I noticed that neither fan was running. Somehow the hot lead to the 2-pin connector had broken.


I soldered it back together and now they are working. It’s been running so far (30 min.) without going out again. I’m keeping my fingers crossed. I gotta go to bed soon.

EDIT: oh yea, Congrats Bommai!
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post #648 of 1592 Old 03-01-2011, 01:03 AM
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Dangit! it made it an hour with the cool air blowing over it then it's blanking out the audio again. I reset it and it worked for a few seconds then went out again.


It looks like I got a turkey. I will have to contact HK and see if the can RA this one.
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post #649 of 1592 Old 03-01-2011, 12:12 PM
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Well that's two people so far that ive heard had issues with this fan.
I just don't like the fact that these fans gotta run all the time my 635 was driving a 5.1 set up of martin logan motion series speakers which are all 4 ohms and i never heard the fan come on even driving them to high levels for long periods of time. And i know that video processors run hot. But if video processor is disabled through the bybass feature there should be no fan coming on.

I also talked to harman kardon the other day i found out that recievers with version 1.11 have to be sent in for the 3d upgrade and version 4.43 are the upgraded models with 1.4. He also said that the updated models usually come with a sticker on the box that says ready for 3d and a piece of paper that explains the 3d upgrade. Now i talked to a manager and this is just what i heard not sure if this is correct so i thought i would post this FYI.

And he also said for the 7550 it's normal for the fan to run on this unit due to the powerfull amps.
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post #650 of 1592 Old 03-01-2011, 01:08 PM - Thread Starter
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Quote:
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Well that's two people so far that ive heard had issues with this fan.
I just don't like the fact that these fans gotta run all the time my 635 was driving a 5.1 set up of martin logan motion series speakers which are all 4 ohms and i never heard the fan come on even driving them to high levels for long periods of time. And i know that video processors run hot. But if video processor is disabled through the bybass feature there should be no fan coming on.

I also talked to harman kardon the other day i found out that recievers with version 1.11 have to be sent in for the 3d upgrade and version 4.43 are the upgraded models with 1.4. He also said that the updated models usually come with a sticker on the box that says ready for 3d and a piece of paper that explains the 3d upgrade. Now i talked to a manager and this is just what i heard not sure if this is correct so i thought i would post this FYI.

And he also said for the 7550 it's normal for the fan to run on this unit due to the powerfull amps.

I had some time today, so I reran the EQ with crossovers set for small speakers and resaved them to position 2. Now, I can change the sub configuration for position 2 to between SUB and none. Technically, NONE should not be an option. But, I left it at sub. I listened to some more stuff. I played the PCM 5.1 track from Casino Royale Bluray. Sounded excellent. The first scene, the title song as well as the urban jumping scene from Africa were all phenomenal. Then I played some iRobot again. That too sounded good. Then I played some Chris Botti and friends PCM 5.1 24-bit/96kHz track - again sounded good and loud! If I turn off the EQ, the sound level decreases by about 10dB - why! It looks like this happens in pretty much all formats (Dolby Digital 5.1 also did that). Now I played the Brothers in Arms SACD and it sounded great. The sub was very powerful. Then I turn off the EQ and the sub was not as powerful. I increased the volume about 10dB (-32 to -22) to get it to sound almost the same level). Now I switched to EQ1 (this is for large speakers with sub set to LFE+L/R) and the sub was not as loud. I actually preferred this a little bit. Without EQ, I had to increase the volume quite a bit. I had planned on turning EQ off for music - but it sounds better at least this one.

Now, I checked one more thing. In the PS3, I had set the 24HZ output to Auto. I noticed that it was playing at 60HZ. I now turned off the receiver, the PS3, and then turned on the receiver and then the PS3 and played the movie again - this time it was 24Hz. So, turning on the stuff in the correct order is important! I set the 24Hz to ON in PS3 to avoid this problem. I wonder how other Bluray players handle this.

I still don't like the remote came with the 7550HD compared to the TC30. I tried to learn the codes but it is still clumsy.

I have not put the 745 back on to see how it compares. I will probably do that soon (if I ever get a chance). Also curiously, I did not hear much fan noise this time. Weird.
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post #651 of 1592 Old 03-01-2011, 01:08 PM - Thread Starter
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Thank you to everyone that congratulated me on the baby. We are very fortunate to have 3 beautiful kids.
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post #652 of 1592 Old 03-01-2011, 02:25 PM
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Hey let me know what you think when you do a comparision between the 7550 and 745 im curious to see what you think.
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post #653 of 1592 Old 03-01-2011, 02:29 PM
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Quote:
Originally Posted by dRockHK View Post

I think you are thinking of the Lexicon RV-5, which was based of the HK AVR 745 (but with some slight changes, including a beefier toroidal power supply)

Ah, right you are, thanks

Noah
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post #654 of 1592 Old 03-01-2011, 03:06 PM - Thread Starter
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speaker king - I did two EQs. One totally automatic - and I saved this as position 1. I did the second one with small speaker settings and saved to position 2. I noticed that my sub output is higher with position 2. I saw this especially with SACD music. The drums were just very loud. But, I did not see such a pronounced difference with movie (Casino Royale). However, I would like to test that again. Also, is your sub output big even if you have EQ on or off. Hmm.
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post #655 of 1592 Old 03-01-2011, 05:11 PM
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speaker king - I did two EQs. One totally automatic - and I saved this as position 1. I did the second one with small speaker settings and saved to position 2. I noticed that my sub output is higher with position 2. I saw this especially with SACD music. The drums were just very loud. But, I did not see such a pronounced difference with movie (Casino Royale). However, I would like to test that again. Also, is your sub output big even if you have EQ on or off. Hmm.

I find that the ez set eq sets the sub to a high everytime i run it so i manually turn it down. And also movies don't sound good unless i put the eq on then its way louder but missing bass even if i put it to the same volume that ez set it at it's so weird. And i use my blue ray player for cd's and blue ray and i don't like everytime i wanna here stereo it defaults to logic 7 and i gotta change it to stereo.
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post #656 of 1592 Old 03-01-2011, 07:15 PM - Thread Starter
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I setup two sources with same audio and video inputs. I set EQ to on for one of the sources and off for the other. You could try the same. I think you might be able to do the same for the audio preferences also. I agree - Bluray and even the SACD sounds better with EQ on.
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post #657 of 1592 Old 03-02-2011, 08:11 AM - Thread Starter
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I have not decided whether to keep my receiver or not but I noticed that 6th ave had dropped the price to $1196 compared to $1236 when I ordered. I used a 4% off coupon code (AFL4COUPON) before and I called them today and got a price reduction. So my final price is $1148.16. I have to pay the dreaded restocking fee though if I return it.
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post #658 of 1592 Old 03-02-2011, 11:50 AM
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I have not decided whether to keep my receiver or not but I noticed that 6th ave had dropped the price to $1196 compared to $1236 when I ordered. I used a 4% off coupon code (AFL4COUPON) before and I called them today and got a price reduction. So my final price is $1148.16. I have to pay the dreaded restocking fee though if I return it.
Well it looks like you got the best price now the only thing to find out is the 7550 better than the 745.
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post #659 of 1592 Old 03-03-2011, 06:23 AM - Thread Starter
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I listened to some 2 channel CD sourced material this morning. Played Dave Brubeck's Take Five as well as some Pink Martini. I played them in 2 channel stereo. Played with EQ on and off as well as EQ 1 (large speakers) and EQ 2 (small speakers). The volume levels were high for EQ on compared to EQ off but not as much as for the surround material. Also, the sound sounded better with EQ on but that could be just because turning on EQ just increases the high frequencies and the low frequencies. I am not an expert at this but I just felt that the music sounded artifically enhanced. The drums were deeper and the trebles were more pronounced. But turning off the EQ produced a more wimpy sound! May be my ear was used to the EQ on for a few minutes until I changed it back. I wonder if I should bring my NAD T744 from downstairs and compare them again just for two channel content.

After I finished playing I paused. I could now hear the fan pretty clearly. It is quit loud - almost as loud as the gen 1 PS3. The top is not at all hot. It was just blowing some hot air through the back. My 745 got hotter in the top but the fan did not come on.

I have not had a chance to put in my 745 yet. It is heavy to move these two around. I am already achy from sleeplessness! Not enough motivation right now.
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post #660 of 1592 Old 03-03-2011, 12:08 PM
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.3
Quote:
Originally Posted by bommai View Post

I listened to some 2 channel CD sourced material this morning. Played Dave Brubeck's Take Five as well as some Pink Martini. I played them in 2 channel stereo. Played with EQ on and off as well as EQ 1 (large speakers) and EQ 2 (small speakers). The volume levels were high for EQ on compared to EQ off but not as much as for the surround material. Also, the sound sounded better with EQ on but that could be just because turning on EQ just increases the high frequencies and the low frequencies. I am not an expert at this but I just felt that the music sounded artifically enhanced. The drums were deeper and the trebles were more pronounced. But turning off the EQ produced a more wimpy sound! May be my ear was used to the EQ on for a few minutes until I changed it back. I wonder if I should bring my NAD T744 from downstairs and compare them again just for two channel content.

After I finished playing I paused. I could now hear the fan pretty clearly. It is quit loud - almost as loud as the gen 1 PS3. The top is not at all hot. It was just blowing some hot air through the back. My 745 got hotter in the top but the fan did not come on.

I have not had a chance to put in my 745 yet. It is heavy to move these two around. I am already achy from sleeplessness! Not enough motivation right now.

Yeah i think it's best to leave the eq off. But i agree it kinda sounds lifeless with it off when you compare with it on. And ive noticed that sometimes when i turn the hdmi bypass from off to on or vise versa the picture looks all distorted i either have to switch back in forth from one input to the other to clear it up. The one thing i noticed if you watching a movie and you have to much bass just turn the lfe setting down and the volume up that makes the sound come out a little smoother.
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