Hi,
I am an happy Fortè 1A owner from Italy 🇮🇹.
A little bit of my personal history: my dad owns a Threshold T50 for 30 years and I aways loved that kind sound, that warmness and that soundstage. I listened that amp since I was born with a pair of Strateg Cyan, an old school handcrafted bookshelf speakers with a 16cm Seas P17 woofer and a 25mm focal t121 tweeter, all in Mogano, assembled by interlocking so without using adhesives and without any sound-absorbing material inside and produced by a local brand - STRATEG by Lorenzo Corsi - that was active until some years ago - https://www.tnt-audio.com/tours/strateg.html). So after discovered that Nelson Pass was behind not only the Threshold but also the Fortè Audio, some year ago I found a used Fortè 1A that, if I understood well, is a project similar to the Threshold T50.
From that moment I’m in love with that amp and even if I try different speakers it’s always pure magic (now I use the Forte 1A with a pair of Martin Logan Motion 20i and I’m really really happy, that folded motion tweeter with this amp ... 😍).
But a month ago appeared a problem: a channel, the left one, started to emit a sound like a whistle, someday not so high, someday higher.
I tried to disconnect the input but the whistle remains.
I also tried to buy a filtered power socket but the whistle is always there.
At the end I tried to open the top cover to blow a little air but nothing changed.
I read here a post of some years ago that talks about the bias and to try to adjust it slowly but I’m a noob.
Someone have any idea about this problem? Who knows a trusted repair service here in Rome or in Italy?
If someone can give me some advice I can give it to a local repair that I know. My concern is about the possibility of changing some components that could modify the amazing sound of this amp.
Thanks in advance.
I am an happy Fortè 1A owner from Italy 🇮🇹.
A little bit of my personal history: my dad owns a Threshold T50 for 30 years and I aways loved that kind sound, that warmness and that soundstage. I listened that amp since I was born with a pair of Strateg Cyan, an old school handcrafted bookshelf speakers with a 16cm Seas P17 woofer and a 25mm focal t121 tweeter, all in Mogano, assembled by interlocking so without using adhesives and without any sound-absorbing material inside and produced by a local brand - STRATEG by Lorenzo Corsi - that was active until some years ago - https://www.tnt-audio.com/tours/strateg.html). So after discovered that Nelson Pass was behind not only the Threshold but also the Fortè Audio, some year ago I found a used Fortè 1A that, if I understood well, is a project similar to the Threshold T50.
From that moment I’m in love with that amp and even if I try different speakers it’s always pure magic (now I use the Forte 1A with a pair of Martin Logan Motion 20i and I’m really really happy, that folded motion tweeter with this amp ... 😍).
But a month ago appeared a problem: a channel, the left one, started to emit a sound like a whistle, someday not so high, someday higher.
I tried to disconnect the input but the whistle remains.
I also tried to buy a filtered power socket but the whistle is always there.
At the end I tried to open the top cover to blow a little air but nothing changed.
I read here a post of some years ago that talks about the bias and to try to adjust it slowly but I’m a noob.
Someone have any idea about this problem? Who knows a trusted repair service here in Rome or in Italy?
If someone can give me some advice I can give it to a local repair that I know. My concern is about the possibility of changing some components that could modify the amazing sound of this amp.
Thanks in advance.
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The Forte' amps are also a favorite of mine. I had a problem with my Forte' 3 and in short, it was one of the integrated circuits used in the input of the amp. I realize that this problem could be anything else, but these little chips made themselves infamous in some of the Forte' amps. A qualified service shop can look into it for you, but I would no idea where that would be in Italy.
