There's some info floating around on both receivers but they are spread across so many threads. I wish we could keep the discussion to a single thread as these receivers gain popularity.
A friend of mine bought the 347 last week and I borrowed it for a night to test out the amp with my Energy speakers. GREAT SOUND!!! So this morning, I high tailed to Future Shop to pick up the 247. Honestly, it doesn't have the features of some receivers in the class like the Yamaha v661 or the Onkyo 605 - but what it does have is clean power, and a very detailed, full sound. Very similar to Pioneer's "warm" tones, but with a heavier emphasis on the mids and bass. Nice!
I also love the way it looks and the on-screen graphics are so much easier to read than say, Yamaha's tiny orange writing.
I am comparing the 347 to my 247 and while the 247 does sound a tiniest more authentic with music, with movies, there is no difference. Both rock really hard and sound fantastic.And Best of all: ONE HDMI cable from my receiver going to the display. So much simpler.
----- A summary of known AVR-247 Issues -----
1. LFE Bug - The LFE channel is not boosted by 10 db for multichannel PCM content.
2. When my DVD player is paused there is popping in the speakers.
3. Some SD tv channels have a "white noise line" on the top or bottom of the screen in 720P output. (not 480P)
4. Some devices connected via composite cable display only annoying blue/black vertical bars on the screen making the connected device useless.
5. Large sparks of pixels on the screen whenever a 1080P signal is passed through.
6. White shimmer or "sparkle" around contrasting areas whenever a 1080P signal is passed through.
7. Video and sound occasionally drop out whenever a 1080P signal is passed through.
----- More info about the following -----
1. The LFE Bug - When using a device that does the decoding and passes it to the receiver via PCM over HDMI the LFE channels it not boosted by 10 db leaving most of the bass out of the movie. This is a major problem as if you have a HD-DVD or Blu-Ray player and want to enjoy the new sound formats. (such as TrueHD for example)
This is said to be corrected in the 2nd firmware release which has no ETA.
2. When a user would pause their HD-DVD-Blu-Ray-DVD player they would get popping from speaker to speaker. A system reset fixed this for some.
3. Some SD channels give "white noise lines" on the top or bottom of the screen. This is very annoying, and only happens when in 720P output mode. It does not happen in 480P.
Quote:Originally Posted by echase
The white noise bars are the closed captioning information encoded in the video stream. Normally a TV receiving a SD (480i) signal will overscan (blow up the picture until the edges are beyond the screen) so they will not be visible. It seems that the up converting in the player maps the pixels across the 720 lines that are output without discarding the top few rows of pixels, so the encoded CC info is visible on screen."
4. Some devices connected via composite cable display only annoying blue/black vertical bars on the screen making the connected device useless. Sometimes the content displays, but when it does it's only for seconds and it's "rolling" up and down.
5. Some have reported large "sparks" on the screen when the unit is passing through a 1080P signal. This seems to only happen when the unit is on for a while. (a few hours) It seems to be related to a possible "over heating" issue?
6. There seems to be a white shimmer or "sparkle" around contrasting areas whenever a 1080P signal is passed through, some have reported. They also report this is often, and doesn't seem to be related to heat.
7. Some people have had their center channel, along w/ all channels drop out with a 1080P signal. Along w/ video drop out. They say it only last for a few seconds, but this is very annoying. As of the center channel drop out, some say sometimes it stays off until the unit is turned off, and turned back on.
----- Firmware Info -----
Q. How do I check my firmware version?
A. Turn on the receiver. When it's on quickly press 1,2,3,4,set.
Q. What is the newest firmware version?
A. 126.96.36.199 - 07-24-07
Q. I don't have the firmware above. How can I upgrade?
A. The upgrade Will be available on the Harman Kardon website under (product support), however it's not available yet. Some of the newer receivers have it, but the older ones do not. You will need a serial cable to upgrade.
Q. What does the 188.8.131.52 firmware correct?
-7.1 via PCM
-Closed captioning via S-Video. (i believe for SDTV)
-1080P @ 24 FPS issue.
----- Processor reset -----
To reset the AVR 247, place the receiver in Standby mode (press the
front-panel Standby/On Switch so that the Power Indicator turns amber).
Then press and hold the front-panel Tone Mode Button for at least five
seconds until the RESET message appears in the display.
***** NOTE *****
*A system reset erases all user configurations, including
speaker and level settings and tuner presets. After a reset,
you will need to reenter all of these settings.
* The RS-232 Reset Button on the rear panel of the AVR 247
does not perform a system reset. DO NOT press the RS-232