PL400 Series 2 Build

[Hexis22]

I found the Benchmark Application Note regarding Damping Factor very interesting and written in a way that's easily understandable.

Specifically, how characterizing Damping Factor, or amp output impedance, with a pure resistive load does not tell the complete story of driving a moving coil speaker with resistive, inductive, and capacitive characteristics that change with frequency.

https://benchmarkmedia.com/blogs/application_notes/audio-myth-damping-factor-isnt-much-of-a-factor

 

[Hexis22]

After building several 700B amps, I decided to upgrade my 400 S2 with a meter sensitivity switch.

Its a nice option to have when most of your listening happens at wife friendly levels.

Given the WO LED boards already incorporate this feature and the WO chassis has an existing switch hole, it only required an additional DPST switch and some wire.

 

[Vintage 700b]

After building several 700B amps, I decided to upgrade my 400 S2 with a meter sensitivity switch.

Its a nice option to have when most of your listening happens at wife friendly levels.

Given the WO LED boards already incorporate this feature and the WO chassis has an existing switch hole, it only required an additional DPST switch and some wire.

Great Idea, and a very neat installation !

 

[Gepetto]

It's the little things...

 

[laatsch55]

Damn nice...them little things..