This is a review and detailed measurements of the amplifier section of the Denon AVR-4306. At the time of this writing, we are still searching for a high-performance amplifier at reasonable prices. None of the new gear purchased has achieved the right bar so I dug into my inventory of old audio products and found this Audio/Video receiver. I think I bought it 12 to 15 years ago. I see mentions of it as far back as 2005. So in audio terms, it is a grandpa.I see the AVR-4306 on Amazon from a number of sellers starting at $389. On ebay, I found $189 including free shipping.As expected, these AVRs are huge as compared to desktop or even some pro products I have tested. The number of jacks seemingly is a marketing thing with more the merrier.For my testing, I only focused on using the unit as a 2-channel amplifier and put it in "CD direct" mode. I also tested it in "pure" mode but made no difference.Let's get into measurements and see if this Denon manages to usneat our bargain basement but new amplifiers.I measured the unit using its CD input with a 4 ohm dummy load. Here is the dashboard view at 5 watts (more or less) power:Wow, for the first time we break into 80 dB SINAD (signal above noise and distortion)! So this is a good sign of things to come. Here is where we stand with respect to amplifier SINAD:Most important for an amplifier is power versus distortion:Now we are talking! The Denon AVR-4306 is significantly cleaner than the NuFroce STA-200. And it produces far more power to boot. Mind you, still not state-of-the-art but we are making progress.Likewise signal to noise ratio breaks new ground:First amplifier tested to break the glass ceiling of 100 db and by decent amount.Frequency response is also a lot more accurate:THD+N versus frequency also shows clear superiority:Slowly we are making progress toward high fidelity amplification. The Denon AVR-4306 clearly has better performance than amps tested so far. I am hoping as we move forward, we will find units in smaller packages with even better performance.-----As always, any questions, concerns, comments, corrections, etc. are welcome.If you like this review,using Patreon ( https://www.patreon.com/audiosciencereview ), or upgrading your membership here though Paypal ( https://audiosciencereview.com/foru...eview-and-measurements.2164/page-3#post-59054 ). It will enable me to pay for gear that is not offered for loan.