Axiom Home Page Forums General Discussion Home Theater Need to buy a new AVR - choices

Arg, no the 2600 doesn't set separate crossovers for separate speaker groups; only some HK and Onkyo models have that feature.


As to the impedance setting on the 2600(or any receiver), set it at 8 ohms regardless of whether the specified inpedance of the speakers is 8,6 or 4 ohms. The switch or setting on various units for a lower impedance reduces the maximum voltage available from the rails in the power supply section. Because of Ohm's Law, when less voltage, which is the key factor in producing power, is available, less current is available(I=E/R; current equals voltage divided by resistance or impedance)and less power is available(P=VxI; power equals voltage times current). Although using a lower impedance setting lessens the chance of a unit starting to overheat and having its protective circuits shut it down, this is rarely a problem, even with 4 ohm speakers and should only be used as a last resort. Manufacturers put such suggestions in their manuals for liability reasons with units that don't have UL certification at less than 8 ohms without it, but regardless of that the 8 ohm setting should be used to preserve the maximum power capability.

Thanks, John. I knew I'd learn something if I just started asking questions.

Hey John,

That Boston Acoustics AVR I was looking at has independent X-overs for all speakers. It’s really quite impressive on paper. If it had a couple more years under it’s belt, I’d have bought it. The Denon 3806 does too. Not as many choices, but you can set the channels up differently. At least that’s the way I took the instructions on both while I was looking. Please correct me if I’m wrong.

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The Denon 3806 does too

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The "advanced setup" page 79 shows directions for setting individual channels including surround A/B and LFE.

What is the general opinion of the group? A lot of the advice on this forum says that at a given price point, most receivers from the main brands are close as far as performance - so we should go with the one that has the features that we desire. So, I am sort of developing a list of features that actually impact the performance of the receiver. Having said that, the independant crossover seems like a nice feature to have - but I don't know enough to know if it makes much of a difference. I was posting in another thread about the upscaling feature - it seems that the upscaling offered in today's receivers is early generation and may not be as good as can be had in the better video equipment.

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Boston Acoustics AVR

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The BA AVR7120 is the same as Sherwood R-965.

The Outlaw 990 is based on the Sherwood P-965 with modifications.

Someone will tell us who makes these private label models.

The BA AVR might not be bad.

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upscaling offered in today's receivers

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Receivers don't upscale (change resolution). They upconvert lower connections (composite=s-video) to component/hdmi. The quality of the signal doesn't change.

Dvd players and tvs upscale 480 to 720 or 1080.

Copy and paste from HK. This is off the new 740 description.

Digital audio meets digital video. Ready for the future, the AVR 740’s DCDi® by Faroudja video processing flawlessly upscales all incoming video to 720p or 1080i high definition and outputs it through an HDMI™ jack.

this is off the 7300 owner's manual.

DCDi™ by Faroudja® video processing and
upscaling customize the video output to
match your display for the highest video
quality, regardless of the input source. All
video parameters are adjustable separately
for each video input.

I stand corrected. 2 so far that meet the upscale criteria. Any others?

So........Looking for opinions - do we think the upscaling would be worth the bang for the buck? What about the variable crossovers - if I am not mistaken, some of the threads that I have read indicate that the H&K receivers do have variables. Are they worth pursuing?