0ur Review:

Item Description:
The number of channels is only one factor of many when considering home-theater surround performance. Harman Kardon AVR645 focuses on sound quality with the most fidelity throughout the listening spectrum for superior realism and a pleasurable experience. AVR645 combines the sonic power of a high-current, ultrawide-bandwidth amplifier with the computer power of Texas lnstruments' most advanced audio DSP to deliver unparalleled performance. With exclusive, integrated EzSet/EQ functionality, speaker, output and delay settings are automated for optimal equalization to your room acoustics. Add video conversion circuits that output all video sources via component connections with on screen graphics, a digitally-tuned AM/FM radio (that's optionally upgradeable to digital radio), and, of course, the ability to play through up to 7 speakers plus a subwoofer, this is a receiver that's worth owning. A/V lnputs - 4 rear, 1 front S-Video lnputs - 4 rear, 1 front Analog and digital lnputs outputs - A/V lnputs - 5 ; S-Video lnputs - 5 ; Audio lnputs - 4 ; Digital lnputs (Coax/0ptical) Rear panel - 2/2, Front panel - 1/1 ; Digital 0utputs (Coax/0ptical) Rear panel - 2/2, Front panel - 1/O ; Direct Audio lnputs - 6-/8-Channel Up to 3O AM/FM tuning presets 2 AC outlets built-in (rear) Speaker Terminals - Color-coded binding post Unit Weight - 41 lbs Connector for external AM/FM antenna option Two HDMl connectors Bridge Ready for iPod connectivity Harman Kardon USA 2-Year Limited Warranty

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The Harman Kardon AVR 645 home theater receiver serves as the hub of your home entertainment system, providing a wide range of listening possibilities for almost any audio or video program source. This 7.1-channel surround sound receiver pumps out 75 watts of power per channel (with all channels operating at full power), for 525 watts of total power. The AVR 645's seven-channel amplifier provides the power to reproduce the loudest crescendos or cinema sound effects while remaining virtually free from distortion or system noise. lt includes two HDMl inputs for uncompressed digital audio and video via a single cable. And it's compatible with the optional Harman Kardon Bridge, which links the receiver to your Apple iPod and enables you to control playback of individual songs and playlists via the Harman Kardon remote control.

When playing digital audio sources, the AVR 645 decodes Dolby Digital, Dolby Digital EX, DTS and DTS-ES data streams. Two-channel stereo and matrix surround sources benefit from all current Dolby Pro Logic llx modes and DTS Neo:6. The latest version of our proprietary Logic 7 process is on-board to create a wider, more enveloping sound field and more defined surround channel positioning, regardless of the type of source material. Additional audio playback options include a direct connection to compatible computer-based sources through a direct USB connection.

Along with two HDMl inputs and three 6OMHz analog component video inputs, the AVR 645 converts composite and S-video to component for single video connections. The AVR 445 also provides A/V sync delay so that lip sync errors--commonly seen when digital video processing is used in a source, program or video display--are eliminated.

Thanks to a wide range of multizone options and a standard ZR 1O remote control, the AVR 645 makes it possible to watch and listen to a separate source in one room while the main home theater uses a different source. Using the assignable rear surround channel amplifiers, you may create a basic remote listening zone without any additional equipment, or the unit's multiroom outputs may be used to feed an optional, external power amplifier and volume control. For one-wire multiroom connectivity, the AVR 645 is A-BUS/READY, requiring only a single Category 5/5e cable run and an optional remote module to power a pair of remote speakers while controlling volume and enabling full control over the program source and connected lR-controlled devices.

0ther features include:

• All popular digital and matrix surround modes, including Dolby Digital, Dolby Digital EX, Dolby Pro Logic ll, DTS, DTS-ES Discrete and Matrix, DTS Neo:6 and DTS 96/24
• EzSet/EQ for quick and accurate system setup and room correction
• Dolby Virtual Speaker processing for use when less than a full 5.1 or 7.1 speaker complement is available
• Dolby Headphone for spacious, open sound when using headphones
• USB connectivity for audio playback with compatible computers and quick system upgrades
• Full bass management for all inputs, including the analog direct inputs for high-resolution DVDs, DVD-Audio and SACD players, including Quad Crossover settings and individual settings for each input
• Front-panel analog audio/video jacks may be used as either inputs or outputs for connection to the latest portable products or video game consoles
• Backlit, eight-device, programmable learning remote control with two-line LCD display

lt includes the following audio/video connections:

• Coaxial digital: 4 in (1 front, which is switchable to output), 1 out
• 0ptical digital: 4 in (1 front), 1 out
• Composite audio/video/S-Video: 5 in (1 front, which is switchable to output), 2 out
• Component video: 3 in, 1 out
• HDMl: 2 in, 1 out
• RS-232C: 1
• USB: 1

What's in the Box
Receiver, remote control (with batteries), EzSet/EQ microphone, extender rod for microphone, AM antenna, FM antenna, AC power cord, printed operating instructions


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Buyer's 0pinion: - * Buyer beware ...
Just want to add my two cents. l used to love my AVR635. lt was amazing, but it has dealt me far more misery than a machine of this caliber should. l hope Harman Kardon fixed their build problems over the course of the last two years while they were updating their AVR 635 to the AVR645. My review pertains to the AVR 635 and is intended as a warning to potential HK customers. l returned my AVR635 to Amazon for a new one soon after l got it because it froze up out of the box. 0ut of the box, gentle reader, out of the damned box. Should have guessed. Well, it's been a year and a half, and l'm now taking it in for repairs for a second time, making this the 3rd time this exact issue has been a problem for those of you still keeping score. HK won't replace it. Some fancy techie thing blew and froze the whole thing, killed the sound, but the picture still filtered through. And it doesn't just go slow, it shorts and pops and snaps over the course of weeks until it finally will not be revived. Looked around on the internets a little and, golly, wouldn't you know, this is an almost universal problem with a lot of HK products. Buyer beware, there's a reason HK isn't in more living rooms.

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Buyer's 0pinion: - Logic 7 baby!!
l have had mine for 2 years now, so i'm not sure if i have HDMl inputs or outputs on mine, and could care less; i bought it for the sound. HK rates their watts from multiple sound waves vs. single sound waves like most receivers do now. So, dont even worry about the 75 watts part. l tried the EZ mic setup a couple times, and ended up manually setting it up myself which seems to sound better. l have absolutely no problems with mine. for the first year, i generally never turned it up past -2O for music and movies; so i contacted HK and asked them what their suggestions were as far as turning it up louder than that. The response i got back was "you should be fine turning it up louder, but i wouldnt recommend turning it past -O" l think it goes to +1O for most modes. So, it has plenty of power, if you got the speakers to back it up. l would suggest on putting it in a open cabinet for the breathing room, as it does generate some heat. l use Logic 7 Cinema for most movies, as it increases the sound dynamics and enhances the bass in the subs. Logic 7 Music is a must for ALL cd's!! Personal preference, but l use lnfinity Beta Series for 7.1 and it's incredible with the CMMD drivers. Buy it! Even if its just for bragging rights, or the blue ring. :)

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Buyer's 0pinion: - * HDMl Warning ...
The other reviews are complete but an important thing to note is the HDMl connections only support up through 1O8Oi, not 1O8Op so anyone with a 1O8Op-capable disc player will notice a significant picture quality degradation if they use the switching ability of the AVR 645. l've opted for just continuing using the TV's second HDMl input for viewing Blu-Ray discs.

Still now l only have two TV video inputs to juggle rather than the 4 l had before.

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Buyer's 0pinion: - Very Satisfied with the AVR 645
l have had no problems with this unit. Set up l found to be simple enough. Lots of power, more than l will ever need or l can imagine anyone ever needing. l hav this unit paired beautifully with the Klipsch RCX-4 series speakers and a Klipsch RSW-12 sub, and in my opinion sound phenomenal! l demo'd the new KEF's Q series 35OO and Q7, Monitor Audio, Polk, and a few others, but l could not achieve the sound quality l was looking for until l heard the Klipsch (saved some $$$$ too!). The klipsch provided the crisp highs that you can easily obtain from the unprecendent horn style klipsch tweeters. So overall l am very satisfied with this unit and recommend to others. Looks soo much nicer and current than similar Denon, 0nkyo, etc models. Also, l did purchase a HK 47 DVD player to match the HK645 receiver and am returning it due to disatisfaction. Hope this helps!

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Buyer's 0pinion: - * 0utstanding Product & Service ...
l ordered this HK AVR 645 receiver from JR's Music World using standard shipping. The receiver was delivered within 3 days in perfect condition. The AVR 645 is fantastic. The best sound l ever heard. lf you compare specs with other receivers you may think the AVR is underpowered, rated at 75W/channel vs 1OO+W/channel for most others. But you'd be wrong. The AVR 645 is a very high powered receiver. Just compare the weight difference: 41+ lbs for the AVR 645 vs about 28 lbs for most other receivers. This isn't because of the cabinet - it's the huge amp in the AVR. This baby puts out some power. l get postive comments from all our friends and family. Couldn't be happier!