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- #141
That's my thinking as well. About to test parallel load and see if that does any better.
Probably not on purpose.Sounds like what they have engineered a SINAD lowering box.
That's my thinking as well. About to test parallel load and see if that does any better.
1. LOL, no, not on purpose, for sure. I guess we're asking our Chinese friends for a lot out of a 140.00 box? I don't see any US or EU companies trying this!Probably not on purpose.
Fortunately the lowering of SINAD is not in an audible amount.
Isn't that a lot better though? And, this is just the VU meter connected, not the switch box?Well, as we just expected, the VU meter does load the amp down and that causes SINAD to drop even when hooking up the meter in parallel with normal amp/speaker wiring:
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Prior to doing that, both channels had a SINAD of 120 dB.
You are right. I didn't look at what we were getting before. And yes, this is just the VU meter. No other functionality is available in this mode.Isn't that a lot better though? And, this is just the VU meter connected, not the switch box?
Envié un video para demostrarlo. I sent a video to prove itSomeone asked about remote control causing the display to dim??? I tried the few on my desk and none do anything. I can't think of what mechanism would cause it to do that anyway unless it had an undocumented IR support.
Well, as we just expected, the VU meter does load the amp down and that causes SINAD to drop even when hooking up the meter in parallel with normal amp/speaker wiring:
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Prior to doing that, both channels had a SINAD of 120 dB.
I don't know. I am going to sleep.What happens when the amp is measured without speaker load (so only the 390 ohm vs the meter as a load) ?
It looks like channel one is now transparent, only CH2 dropping 5 SINAD? I wonder why?You are right. I didn't look at what we were getting before. And yes, this is just the VU meter. No other functionality is available in this mode.
I only connected one channel to the vu meter as to show the difference.It looks like channel one is now transparent, only CH2 dropping 5 SINAD? I wonder why?
A 5dB drop is better than a 15dB drop so it looks as if about 10dB drop is due to the added contact points and about 5dB may be caused by the circuit applying a non linear load.It looks like channel one is now transparent, only CH2 dropping 5 SINAD? I wonder why?
Manual FAQ extract :Someone asked about remote control causing the display to dim??? I tried the few on my desk and none do anything. I can't think of what mechanism would cause it to do that anyway unless it had an undocumented IR support.
Years ago I bought a similar switch made by Beresford so I could use the same speakers either side of the TV with both my 'hi-fi' stereo amplifier and 2 channel sources as well as front left and right for my AV receiver, much better than little satellite speakers. This was a much simpler passive switch with no eye candy and no remote. The idea being to save on the number of speakers in the room as well as improving the sound of the 5.1 system. This was also based on the received wisdom that AV receivers sound much worse for music than stereo amps so you wouldn't want to just attach 2 hi-fi speakers to your AVR and play your music CDs etc. through that on source direct.Well I have it to switch between 2 amplifiers.
What seemed strange to me is that it dimmed the light with the remote control but apparently I have read that it is the most normal ... as seen, I will have to buy a couple more speakers and connect them directly each to its amplifier....
Sorry to ask again, but how does that compare to the voltage SINAD when the amp is connected to a real speaker rather than a power resistor ?Well, as we just expected, the VU meter does load the amp down and that causes SINAD to drop even when hooking up the meter in parallel with normal amp/speaker wiring: