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| 12-31-2012, 03:37 PM | |
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Procrastination is the thief of time.
-- Edward Young Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety. -- Benjamin Franklin You shouldn't mix meditation with management. The mind gets too empty. -- Scott Adams, "Dilbert" |
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they screwed up my shipment so they give me a $40 refund
plus the $22 price adjustment means I got one for $407 not bad at all considering I bought my 609 for $330 last year...... no one wants to buy a lightly used 609 do they hahahaI'll make u a "slick deal" on it
Last edited by gunthonungo; 01-02-2013 at 08:54 PM.. |
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The biggest upgrade is the type of high current amp used in the 809. If I understand correctly, 609/709 series receivers have one type of amp system and the 809 has a totally different amp system referred to as some kind of PUSH-PULL design,,, gotta look it up on google to read a description if you want... that's the whole reason I splurged and did the upgrade... I have Bowers and Wilkins speakers and the more power you give those things the more they seem to come alive... that was my reasoning for it... There are other features like the Audyssey MultEQ XT, higher end video processor, RS232, 12v trigger, etc.... but my main goal was to get more power for my speakers..... hope that helped... and here's a copy and paste of something in wikipedia about push-pull amp design... do I understand it all??? heck no..... and I'm not tryin to get into some deep discussion about it... but there's definitely a meaningful difference in the amp design of the 609/709 and 809.... "A push–pull amplifier is more efficient than a single-ended "Class A" amplifier. The output power that can be achieved is higher than the continuous dissipation rating of either transistor or tube used alone and increases the power available for a given supply voltage. Symmetrical construction of the two sides of the amplifier means that even-order harmonics are cancelled, which can reduce distortion. [1] DC current is cancelled in the output, allowing a smaller output transformer to be used than in a single-ended amplifier. However, the push–pull amplifier requires a phase-splitting component that adds complexity and cost to the system; use of center-tapped transformers for input and output is a common technique but adds weight and restricts performance. If the two parts of the amplifier do not have identical characteristics, distortion can be introduced as the two halves of the input waveform are amplified unequally. Crossover distortion can be created near the zero point of each cycle as one device is cut off and the other device enters its active region." |
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