PL 700 II REPLACEMENT MAIN VOLUME POTS

[e30m3mon]

To each our own Perry. We can have it like we want it..

And that's the beauty of being able to "roll your own" - with this stuff.

 

[George S.]

About 1/3 of the 700 I've built have been without pots. My personal 700's are wired direct....

Lee, can you hear the difference between pots and direct?

 

[WOPL Sniffer]

Lee, can you hear the difference between pots and direct?

See Lee's post, #115

 

[George S.]

Sniff, think he's talking about bypassing the DCP rather than the attenuator pots. I may be mistaken.

 

[WOPL Sniffer]

No pots, and bypassed DCP, couldn't tell the diff maybe???

 

[laatsch55]

Lee, can you hear the difference between pots and direct?

Sometimes I think I can George and sometimes I just cant tell. On the better engineerd stuff yeah...

 

[laatsch55]

George, one time on Stephen's system in Phoenix he played his Sweet Thunder release of Crime of the Century on his Thoens TD 520 with an unpronounceable Japanese cartridge through a Walker Reference phono amp, Rowland Coherence preamp and the Silver Shadow 400 pushing some JBL L200'S. A very discerning system. I heard the difference without a DCP and with one. It was noticeable, but man, that was some expensive gear that was probably worth what he spent..

Sure miss that guy..

 

[George S.]

Lee, I hear you. I appreciate it. It's tough losing a good friend. I remember you talking about him once, a forensic accountant I believe.

 

[laatsch55]

Correct George, and before that managed a bunch on Tech Hi Fi stores in Ohio...some great stories from those times.

 

[MusicSteve]

Sometimes I think I can George and sometimes I just cant tell. On the better engineerd stuff yeah...

Imo , W the 700II and 400II you might hear a different if the POT are not turned all the way up. Ed said that their is distortion if the Pots are not turned up all the way.
I always had them turned up and I love the look of them.
also, what kind of cables you use can to the pots can make a huge different (never like the Phase linear Cables) and how you rout them also can make a different. (this is the most important cable in the amp - Low single level)
But I like to turn them all the way down for troubleshooting and if I'm removing RCA cables. like you said can make a high pitch noise which I don't like!

 

[WOPL Sniffer]

Imo , W the 700II and 400II you might hear a different if the POT are not turned all the way up. Ed said that their is distortion if the Pots are not turned up all the way.
I always had them turned up and I love the look of them.
also, what kind of cables you use can to the pots can make a huge different (never like the Phase linear Cables) and how you rout them also can make a different. (this is the most important cable in the amp - Low single level)
But I like to turn them all the way down for troubleshooting and if I'm removing RCA cables. like you said can make a high pitch noise which I don't like!

For troubleshooting, the amp should be turned OFF before connecting and disconnecting anything.

 

[MusicSteve]

50% pot setting, 100K pot. Input impedance = 55.54K ohm at 100 Hz or greater, 220K at DC

View attachment 72430

Thanks Joe
I like the charts, never really understand the circuit (Never like the Sw and I never thought it was Audio grade)
see pic What's the advances of the low pass capacitor filter can, is it also a dc coupler to the inputs?
I have my 400II wired like this and thinking the same w the 700 II w the pots all the way turned up.

I Don't Remember if the I have a 200k resistors hooked up and w this setup is their a reason to have the resistor installed?
w the low pass capacitor installed would give me more real power for the amp?