Denon PMA-800NE vs Onkyo A-9150 review
Denon PMA-800NE review
Denon wins in terms of power output. Here we have 50/8 vs 30/8 W/Ohm. The amplifier is equipped with an excellent built-in MM / MC phono stage, which can compete with many stand-alone devices. The digital section in the amplifier is represented by three optical and one coaxial inputs, which are capable of receiving a PCM signal with parameters up to 24 bit / 192 kHz. At the same time, the entire digital part of the Denon PMA-800NE can be turned off if desired, in order to eliminate its influence when listening through analog inputs. The amplifier takes special measures to separate digital and analog circuits. For their power, separate secondary windings of the network transformer are used. 
Onkyo A-9150 review
The stereo amplifier is equipped with an AKM AK4452 DAC (32 bit / 768 kHz) and a DIDRC filter, which makes it possible to increase linearity and minimize intermodulation distortion in the ultra-high frequency range, which translates into lower noise and interference in the audible region. According to the manufacturer, such a combination of a DAC with a filter guarantees the most realistic and accurate sound supply, in which there is no so-called “synthetic aftertaste” characteristic of digital sources. 
Denon PMA-800NE pros & cons
Pros
- Operationally the amp is really straightforward
- The remote control moves the volume in really fine increments
Cons
- I wish the power cord was detachable so I could use one of my better ones
Onkyo A-9150 pros & cons
Pros
- The bass remains clearly defined and resilient even at the bottom of the spectrum.
- Gold-plated connectors are spaced far apart, which makes it easy to connect the thickest interconnects
Cons
- No USB input for connecting to a computer
