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Yes it has a built in amp running a pair of 2sc2290's. X-Force, the makers of his amp recommends that as a driver. Even though it matches their recommended driver, it is still seriously over driving the 4 2sc2879's in the amp. The 2sc2879 transistor is rated at 100 watts output if memory serves. That would mean the advertised 600 plus watts that amp is running at can only be achieved by running those 2sc2879 transistors out of spec, and with that driver they are being run far out of manufacturers specifications.

This pushing bipolar transistors out of specification is commonly done today. hey will have a shorter use life because of this. It also means they generate a lot more heat then they normally would, which is also the enemy of bipolar transistors. I would love to see the problems these manufacturers would have trying to do the same with the newer RF mosfets...

The DB

<blockquote data-quote="The DB" data-source="post: 387988" data-attributes="member: 21346">Yes it has a built in amp running a pair of 2sc2290&#039;s.&nbsp; X-Force, the makers of his amp recommends that as a driver.&nbsp; Even though it matches their recommended driver, it is still seriously over driving the 4 2sc2879&#039;s in the amp.&nbsp; The 2sc2879 transistor is rated at 100 watts output if memory serves.&nbsp; That would mean the advertised 600 plus watts that amp is running at can only be achieved by running those 2sc2879 transistors out of spec, and with that driver they are being run far out of manufacturers specifications.This pushing bipolar transistors out of specification is commonly done today.&nbsp; hey will have a shorter use life because of this.&nbsp; It also means they generate a lot more heat then they normally would, which is also the enemy of bipolar transistors.&nbsp; I would love to see the problems these manufacturers would have trying to do the same with the newer RF mosfets...The DB</blockquote>

[QUOTE="The DB, post: 387988, member: 21346"] Yes it has a built in amp running a pair of 2sc2290's. X-Force, the makers of his amp recommends that as a driver. Even though it matches their recommended driver, it is still seriously over driving the 4 2sc2879's in the amp. The 2sc2879 transistor is rated at 100 watts output if memory serves. That would mean the advertised 600 plus watts that amp is running at can only be achieved by running those 2sc2879 transistors out of spec, and with that driver they are being run far out of manufacturers specifications. This pushing bipolar transistors out of specification is commonly done today. hey will have a shorter use life because of this. It also means they generate a lot more heat then they normally would, which is also the enemy of bipolar transistors. I would love to see the problems these manufacturers would have trying to do the same with the newer RF mosfets... The DB [/QUOTE]

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