I already bought it, so I hope the answer is yes! ha. But It is a Phillips 3841, fully restored. Google says it is 40 wpc, but apparently he upgraded it to 50 wpc. I am not familiar with restoring vintage amps, so I am hoping that is true. He seems to know what he was doing. I bought it to be used in a den with a TV and also to a line going from my computer. So if I play tunes from my computer., that can also be heard in the den. The den has upgraded Minimus 7's and an 8" subwoofer (connected speaker-level). Since I did want something vintage, how'd I do? The fact that it has TT inputs (2!) is a bonus, but that room doesn't have a TT. Just bought it on-line last night. I only had to pay $26 for shipping. Not too shabby. The fact that he altered the look does not bother me. It probably looks better than original.
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Looks like a low end consumer integrated amp of the period. It was made from 1977 to 1981.
In those days, all decent gear from Philips was made in Einthoven Holland on the German border. This unit was contracted to a Japanese manufacturer, but I I can't find which.
The amp is over specked. It is actually 35 watts per channel, as distortion is unacceptably high at 40 watts per channel.
I looked at the circuit, it has an operational IC amp front end. The tone control stages are discrete transistor. The driver stage is an IC chip. The output is a complementary pair of transistors.
The power does not increase as load impedance drops. So the amp is severely current limited.
I would highly doubt that driver chip is still available, so If that fails it will not be fixable. ICs of that period were not nearly as reliable as they are now.
In addition the signal to noise ratio is only 60 db. It is not specified whether this is weighted or unweighted. The marketers though would have picked the weighted speck, you can be pretty sure. By modern standards, this would be considered poor. Older solid state devices as a whole tend to be more noisy than modern ones, especially the ICs. When that amp was designed ICs had only been in common use for three to for years at most. That technology has improved enormously over the 45 years or more, since that unit was designed.
To me this looks like a fairly bottom end of the market unit, with a couple of VUs slapped on the front, which likely was done to impress and jack up the price.
As others have said you can not increase power output without increasing voltage and that would mean that you would need a new power supply. It is clear the output devices are maxed out, so if you tried it would blow up.
I hope you have not paid a lot for it. There are remaining very classy units from years gone by. This is not one of them.
Whereabouts in Minnesota are you? I'm in Eagan.
