It would be nice to lower rail voltage to about 45vDC in high power mode. Not sure if this is the right thing to do. I had done something similar in a test amp prior - playing with rail voltage as an experiment. If I increase R102 or R104 in the PS circuit a few K ohms will that reduce rail a bit? SOA seems kind of tight with TIP102 at 49vDC otherwise. Find many great new & used options and get the best deals for HIGH END HAND MADE IN USA Soundstream Reference 405S Amplifier. Come to think of it, 49vDC is the highest rail voltage I've ever seen in a soundstream reference amp. Thats just shy of the 50v rail caps, and the TIP102/107 are only rated for 100v. Kenapa terlihat para karena yang punya sudah korb.
The sub channel to my surprise is running +-49vDC rail. Power Amplifier Mobil Soundstream Reference 405s Rusaknya terlihat parah tapi ternyata penyebabnya sepele. Asking a lot from this amp with those dubs IMO those subs are looking for about 1000w whereas this amp can only give about ~300w. The customer was running it at 1.5 ohms under High Power mode, with two JL13tw3-3 subwoofers in a sealed box. Amp is working again and I've tested it down to 1.5ohm in high power mode. Replaced all TIP102, TIP107, MPSA14, and 0.27ohm emitter resistors.
SOUNDSTREAM 405S DRIVER
Checked driver cards, rebuilt the sub driver card. Prior to the return, I rebuilt 3 of the 5 channels. Also put in a brand NEW FED1 driver card this time, and two new Rectifiers for the 5th channel. This amp came back after I rebuilt it and the sub channel failed. Returned to me, and I found the entire 5th channel blown. The amp passed all tests and I sent it off to a customer.Ībout two weeks go by and customer says amp is blowing fuses. Checked driver cards, rebuilt the sub driver card. HIGH END HAND MADE IN USA Soundstream Reference 405S Amplifier. This amp came back after I rebuilt it and the sub channel failed.
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