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geoff geoff is offline
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Default Subwoofers! Etc.

On 23/02/2021 10:23 am, wrote:
geoff wrote:

=============

Actually I'm repairing a Bose 1800VI power amp that is reputed to be
quite good. But when you pull it apart it turns out to be Carvin.


** Yep, a PM1400 " magnetic field " job.

Tip from an expert:
Be very wary of any amplifier that has speaker maker's name on it.

Bose, JBL, AR, Renkus-Heinz, EV, Altec ......

I was thinking about a different amp entirely, which was internally
Carvin - not Carver.

This says Bose on the PCBs - I wounder what the Carver one says.



**Err - it says "CARVER"

https://audiokarma.org/forums/index....oes-on.776885/


It is
a 'straightish' Class AB power amp with a touch where DC rails are
monitored and a triac momentarily switches in an extra section of mains
transformer primary if they dip.


** Bit like the Carver then.



...... Phil




You conveniently snipped the "Nothing to do with Carver's sonic
holography magnetic field amp mumbo-jumbo, unless that's all it is ...."
from my post, eh Phil.

Actually Class G or H apparently. And apparently the little mains kick
*is* all the 'magnetic field' mumbo-jumbo was about. No big deal at all.

And the 'sonic hologram' was something else entirely.

geoff