stereo-högtalare till datorn...|Page 4|Generella frågor|Forum|Nordichardware

Här följer en liten del av ett test på harman kardon 680 obs jag har modellen under 660.

Overall sound

The Harman/Kardon 680 has all the usual company qualities and misses out on most companies' nasties. Its bass lines are superbly deep, powerful and gutsy yet controlled, and I quite seriously challange any and all comers within its price class to try to equal this (the only serious contender I can think of is NAD's new 317, which while good, is not quite in this class). But this speed, rhythm and power has long been H/K's strong side, so I regard this merely as natural evolution.

Its midrange is the best I have heard to date from this company's integrated units, and one of the best in its price class. It's all there, and I'm hard pressed to say anything in form of critcism for fear of being either unreasonable, or less than truthful. Let's just say it's very, very good, period

This is a smooth, powerful performer, capable of whisper quiet playing and a thunderbolt out of the blue if necessarry. It reminds me of a panther, being capable of stalking you and pouncing at you the instant that's required, with much grace, finesse and that exclusively cat-like speed. Then again, until some months ago, this was their best offering

My curiosity got the better of me, so I took the 680 to a friend's house. He has a pair of Apogees, which I consider to be such a difficult load that they might as well be nicknamed "The Budget Amp Killers".
He uses a custom built 200W per side amp, using 6 pairs of 250W Motorola power transitors per channel. And the room is kinda big, at some 5x8m (app. 16x27ft).

Well, we laid on some fast and powerful stuff, like Vangelis and Enigma, but also some acoustic, gentler stuff, like Kitaro and my inevitable Vivaldi. Berlioz and Mozart did some time too.

Rather to my surprise, the H/K 680 managed fairly high levels of loudness before it became stressed and started really heating up. The Apogees it drove actually dip down to 2.1 Ohms with a significant phase shift, all of which has the amp see something like 1.1 Ohm "impedance" (hell, that's more like a short circuit than an impedance - you might as well drive your solder gun with it).
If kept within reasonable room levels, the H/K had no particular problems with those speakers. As was to be expected, some of its transients weren't what they should have been, even if only in some extreme cases. However, just as with JBL CM62s, we have here a gross price mismatch, only in the opposite direction. Not many will drive $ 8,000 speakers by a $750 integrated.

Then again, not many $750 integrateds will drive those speakers at all; try it sometime, but have spare fuses ready. And don't forget to pray.

Some rough measurements indicated that it is in fact MUCH more powerful than the declaration would have you believe. It delivered 10mS bursts of - hold on, now!- no less than 430W into 2 Ohms. Good God, that's almost double of what the rating specifies!
Also, those are bursts of some 21 Amperes, something not many can boast, and in this price class, very few indeed.
Better yet, it pumped out just over 680W into 1 Ohm - now, that's one Mean Machine, as those are peak current outputs of almost 37 Amperes. No wonder it drove the Apogees so well. And it remained completely stable.

What's to say with results like this? It's been a long, very long time since I came across such a conservatively specified unit I almost forgot what it looks like. It's really underspecified, but what the hell, that's great news for the owner.
Nevertheless, I would urge owners to be very prudent with that volume control - that kind of power means it's imprevious to almost anything one cares to call a speaker, which is good, but is also quite capable of destroying lesser speakers if pushed hard, which could be dangerous.
However, that is a matter for the owner to settle, not the manufacturer, who obviously did his part of the job well - and then some!

"Har ingen koll på din förstärkare men om det inte är en "hemmabio"-förstärkare och du inte tycker att detta behövs så tror jag aldrig att du kan ha lyssnat på bra hemmabiosystem."

Nu har du lite mer koll på min förstärkare den driver mina SM155or + två mindre golvhögtalare utan minsta problem har aldrig utnyttjat mer än 50% av volymratten och då med minimal bas för att inte förstöra högtalarna, alla fyra högtalarna går max när jag använder runt 40% av volymen efter 40% är det bara att vrida ner basen och hålla för öronen

http://www.tnt-audio.com/ampli.....680_e.html

för dom som vill läsa hela testet

"fast det är klart, du hör ju inte skillnad på CD & MP3.... He"

När hadde du möjlighet att lyssna på bra inspelade mp3or vs samma låt på cd med ett knapptryck senast? dvs byta mellan aux och din cd spelare,förmodligen aldrig kom tebax när du vet vad du talar om

Jag påminner än en gång att det är SKILLNAD!! på mp3 och mp3 när det gäller ljudkvalite.

Dom skivor jag har kvar är från 2 år och bakåt, jag sluta köpa skivor i samband med att jag fick bredband då insåg jag hur trevligt det är att ha mp3 istället för att bli ruinerad pga av att man tycker om att lyssna på musik.

Funderar på att sälja min skivsamling då jag aldrig lyssnar på cd skivor mera.

Den dagen när man kan sätta ihop sin egen cd i butiken och betala per låt kanske jag börjar handla skivor igen

Tänker inte betala 200kr för ett album där man bara gillar 1-3 låtar vilket oftast är fallet.

Nu ska erkännas att det tar tid att hitta bra mp3or, man kan få ladda ner samma låt ett flertal gånger med samma bitrate innan man hittar en med godkänt ljud

DC?