With Klipsch speakers…Here's an acrylic rack with my E50 and PA3s. Sounds sublime with Klipsch Forte speakers. Plenty of power to fill a good size room. Imaging, soundstage and clarity is first rate.
With Klipsch speakers…Here's an acrylic rack with my E50 and PA3s. Sounds sublime with Klipsch Forte speakers. Plenty of power to fill a good size room. Imaging, soundstage and clarity is first rate.
Yes. Fortes from 1986. 98dB sensitivity, no problem. I prefer this amp to the six watt se tube amp I was using.With Klipsch speakers…
Tube amp…Yes. Fortes from 1986. 98dB sensitivity, no problem. I prefer this amp to the six watt se tube amp I was using.
I hooked mine up to my JBL Studio 590s and it gets loud.Tube amp…
Musical Paradise MP-301 MKIII.Tube amp…
I took the 2 TR8 screws out of the back, but couldn't get it to come apart. There may be more screws under the feet but I don't want to take them off. Sorry.Has anyone done a teardown of this amp?
These are passive speakers plugged into the PA3S. I tried moving power supply, speaker cable, everything. The common denominator was the speakers. 2 other sets of speakers don't have this issue.@andrewskaterrr interference with active speakers? Does it change if you move the speaker cables around? Since the output of the PA3s is likely unfiltered there will be a lot of high frequency noise on those cables; I have no idea if this would active active speakers. It's unlikely, I suppose, but maybe it could.
I have a 6Ω or 4Ω passive speaker connected to my PA3s and I don't see any such symptoms.These are passive speakers plugged into the PA3S. I tried moving power supply, speaker cable, everything. The common denominator was the speakers. 2 other sets of speakers don't have this issue.
I tested it on my JBL Studio 590s and a pair of old Sony towers, and neither had this issue. These are the only speakers that did it, and yes it was through both speakers although different for each speakers. That’s why I think it’s down to EMI/lack of PA3S grounding with, I assume, unshielded drivers in the speakers.I have a 6Ω or 4Ω passive speaker connected to my PA3s and I don't see any such symptoms.
In your video image, the speaker is connected only to R-ch. Is it the same symptom for L-ch?
Perhaps the PA3s have a filterless output, just like the SMSL amp products that use the MA1207 chip. But I think the noise coming out of the amp is high frequency noise and will never sound like your video.I tested it on my JBL Studio 590s and a pair of old Sony towers, and neither had this issue. These are the only speakers that did it, and yes it was through both speakers although different for each speakers. That’s why I think it’s down to EMI/lack of PA3S grounding with, I assume, unshielded drivers in the speakers.
I’m not sure how it would be power supply or amp failure though? You can hear the typically cell phone interference sound kick in towards the end. Interestingly enough it will go down after like 30secs, but the noise floor is still much higher than when it’s connected to other speakers, and still makes some noise randomly.Perhaps the PA3s have a filterless output, just like the SMSL amp products that use the MA1207 chip. But I think the noise coming out of the amp is high frequency noise and will never sound like your video.
From your PA3s symptoms I suspect a power supply unit or PA3s failure.
I haven't noticed anything to that effect. I only use RCA for mine, but I simply move my speakers around to get good stereo image. I do have a slight imbalance in my headphones (probably because of how they are seated on my head), but at least it the difference in the PA3s isn't very pronounced, if it exists.There is a gain difference between R-ch and L-ch of RCA input
Thank you for your reply.I haven't noticed anything to that effect. I only use RCA for mine, but I simply move my speakers around to get good stereo image. I do have a slight imbalance in my headphones (probably because of how they are seated on my head), but at least it the difference in the PA3s isn't very pronounced, if it exists.