Recent content by bigguyca

So you are recommending that all AVR's and AVP's would be improved if they used digital volume control only instead of analog and digital volume control.

Some estate planning would be good before proceeding too far with this project.

We will see, the buffer circuits in the Cinema 30 appear to use the same HDAM circuits, two per buffer circuit, as the SR8015 which measured quite a bit worse than 107dB SINAD on ASR. The remainder of the Cinema 30 output buffer circuitry appears similar to the SR8015. An HDAM, what appears to...

The AV 10 SINAD is limited by the 8-channel CMOS volume control IC's used in the AV 10 and most D/M gear. The volume control IC's are excellent products, but they are the limiting factor.

Even more amazing is that some people pay MSRP.

As with most questions such as this one, the answer is NO.

The current limits and temperature limit circuits are likely separate from the rail voltage switching that would be used to implement the 4 ohms setting. Typically the lower impedance setting, that results in significantly reduced power amplifier rail voltage, will cause worse measure...

The ADM AK4458 DAC IC was used in the X6500H. The same DAC IC will likely (but not for sure) be used in the X6800H. Denon began biasing the opamps for the L,C,R channels in the differential amplifiers for the DAC output stage into Class A to improve performance n the X6500H. Perhaps this is...

Denon X6800H DAC IC's Based on looking at the DAC board, X6800H has two 8-channel voltage output DAC IC's. The AKM 8-channel DAC IC widely used by Denon/Marantz before the AKM fire, the AK4458, is, and has been for a while, available in large quantities. There are several electrolytic...

The voltage output per channel at any specific instant is not known without measurements. The maximum voltage a system will output per channel at a given volume control setting can be calculated, which provides a very useful answer. The maximum preamp output voltage out at reference level for...

Per memory, Warren Buffet (or Berkshire Hathaway) bought AP a few years ago. Warren only purchased AP for one reason. One of Warren Buffet's key characteristics for purchasing a company is purchasing a company with pricing power. See the same result with Heinz Ketchup, Johns Manville and...

The specs are well known. What's your point? The stop band in the datasheet and in Amir's measurements is a truly mediocre -60dB as well. The PCM510xA series must be really inexpensive to implement since they have a single-ended output and appear to not require an opamp output...

The information in the link is correct, same mediocre TI DAC IC: X3800H, X4800H, X6700H. Also TI DAC IC in the similar, but more expensive, Marantz Cinema 50, 40, 30 units although Marantz is less forthcoming with this information.

You are assuming 100% efficiency. That is nonsense. 50% to 60% is more likely. Accuracy to .33 is nice however. Something like 35W to 50W per channel is more realistic in the real world.

Why?