Another high end hybred chip amp?

[teknofossil]

I was doing some research (looking for reviews) on a amp (Blue Circle BC28) that a coworker was considering purchasing from a audio shop in Amherst MA. one of the "on-line" mags did a review in 2003 and had a lab test the amp with the results to compliment the reviewers article (which was positive by the way) . In the lab test findings they noted that the amps output stage, while resembling power transistors, were actually 4 pin devices, which (they conclude) if you include the case, suggests a power opamp. I can think of only one device that meets this criteria. (LM12) The test report is available here: Blue Circle BC28

Enjoy!

-T

[leadbelly]

Further, the interconnection of these devices produces a bridged output signal with two phases of opposite polarity in respect to signal ground from the single-ended drive out of the tube front end.

Based on this kind of nonsense, I wouldn't trust very much of their assessment.

[planet10]

Further, the interconnection of these devices produces a bridged output signal with two phases of opposite polarity in respect to signal ground from the single-ended drive out of the tube front end.

Just a wordy description of a standard bridged output stage.

dave

[leadbelly]

Originally posted by planet10
Just a wordy description of a standard bridged output stage.

dave

Oh, like so I guess:

[planet10]

Originally posted by leadbelly
Oh, like so I guess:

exactly....

oOne has to be cautious when the marketing boys get a hold of stuff that has been done forever.

dave