The response starts to drop from 2 kHz on down. SINAD as a result improves a bunch to 65 dB.
Look at the radical reduction in mains hum and the rest of the noise spikes that were there. So I ditched the power supply that it came with and powered it with my lab supply: But here, that peak would not move a millimeter no matter what I did. Now, this is common and usually I can remedy it some by playing with grounding. SINAD (signal over noise and distortion) is completely dominated by mains hum at 60 Hz. Here is our usual dashboard with 5 millivolt input to simulate a moving coil input: Let's put the thing on the bench and see what comes out. As the line in Adams Family goes: "be afraid, be very afraid" when using this power supply. So they even skimped on glue to mate the two halves. Worse yet, as I tried to unplug it once, one side actually caved in. There is no regulatory/safety marks on it whatsoever. One look at the external switching power supply though tells you corners were cut. Headphones are optimally suited for analyzing tonal artifacts in a recording but completely distort distance perception.View attachment 35987The box is solid enough given the price range. "Headphones are completely unsuited for judging the spatial rendering of a stereo recording that is intended for loudspeaker playback. Money doesn't buy pleasure ever."-Alan Watts "It's enormously important to understand that there is absolutely no possibility of having any pleasure in life at all without skill. Unfortunately very few of our current genre of acoustic tests have had this kind of introspection." - Geddes It is the perceived sound quality that matters not the measured quality – unless that measurement has been scaled and correlated to subjective perception through valid psychoacoustic tests. "Blind reliance on measurements can be misleading ‐ one needs to tie those measurements back to subjective perception. The room response gives a picture of the steady state SPL, where sound generation and sound dissipation in the room have reached their equilibrium." -Linkwitz The resulting curves must not be taken as a 1:1 representation of what is heard as loudness at different frequencies. " The room response must be averaged to recognize trends in the summation of direct and reflected signals at the microphone. are welcome.Īny donations are much appreciated using : But that it delivers way, way above its cost point.Īs always, questions, comments, recommendations, etc. Not because it has great measured performance as far as noise and distortion.
I am going to recommend the Pyle PT8000CH. The PT8000CH won't be my main choice for a high-performance 2-channel system but for surround duty and certainly multi-room amplification, it seems fine. You are paying almost nothing for this amplifier (the case alone could cost you this much!) yet you get way above a broken design.
The amplifier protection and ability to handle complex loads is excellent. Distortion and noise are rather high though and rank well below our average. Massive power supply courtesy of dual toroidal transformers powers the 8 channels well, allowing the amplifier to meet spec. The build quality of this 8-channel amplifier seems quite substantial. Testing at 1 ohm resulted in momentary shutdown. At 2 ohm though, it starts to complain, dropping its output voltage by nearly half. This is quite robust! At both 4 and 8 ohms, the amp doesn't care if the load is reactive or not.
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