Phase Linear 400 (Early Model Run) On Loan

Elite-ist

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Hi all,

Three weeks ago, Doug (fitz43) and I met at West Vancouver, after work, so that I could return his Larrt WOPL 1000 Phase Linear 700 B power amplifier, which I had been borrowing since early June. I can say the PL 700 B sure felt like it was at home in my stereo stand. I admire the looks of this particular amplifier and with the upgrades done by Lee this amp would put many of the current-market amps to shame. Who says because it's old means it's not better? I would say quite the opposite in my experience with stereo gear.

We all met - that included Geri, who got to the designated meeting place at White Spot restaurant, before both of us, and we sat outside on the patio. She works in downtown Vancouver and it was only a 15 minute trip for her. I am sorry that traffic was unruly for Doug as he neared the restaurant as this is a bad time of day to be travelling during rush hour. We had a meal together and this gave us time to have a decent chat.




Doug had given me a choice of power amplifiers to borrow, including his Ampzilla and Rotel, but I chose the PL 400. Why? Only because I wanted to hear how a PL 400, of that vintage, would compare to a full-tilt PL 700 B. Yes, I immediately heard a difference in power output, as I had been accustomed to where loud was on the preamp's control. But, the PL 400 gave up nothing, seemingly, on audio clarity. Because this is the 4-fin heat sink model, it's an early model 400.





Along with the power amp for me to use, Doug had recently recorded a few MiniDiscs with his newly acquired Sony MD deck. The Muddy Waters recording is recorded from a Japanese CD release. I think Doug will enjoy the MD format.



And for protection of my speakers he lent me this fuse box which I have had connected since hooking up the PL 400.



I haven't spent as much time as I had hoped listening to Doug's PL 400, but I have more time now that our car club's annual car show is over and Geri and I are back from our mini-vacation.



Thanks once again, Doug, and I know you will have more to add about the history of your Phase Linear 400.

Nando.
 

kevin

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Nando ! Always love your threads man !! Always a great story full of really good pics ! My first PL was a 400. Dr Mark built me one some time ago... Who knows what happen to him.... LOL.. Then Lee built me a UNREAL 700... I love both of them. And they are as different as they are alike... I think you will find the 400 to be a richer, warmer, sweeter sound ! The 700..... Just a monster ... power house... and yet still sounds great ! If ya get done with that 400 I'll send ya a Hafler P-500 That Dr Mark spent weeks fixing for me and I really never had a chance to try it out..... Someone needs to play this thing ! Can't wait to hear what ya think of the 400 !
 

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Thank you, Kevin. I like to elaborate on threads which I think will entertain and, perhaps, inform other members on a particular subject. I have never had the chance to have two Phase Linear power amplifiers, back-to-back, to play with. Including yourself, I have heard from three members who have preferred the sound of the PL 400 over the PL 700 B. It may be a slight edge, but nonetheless, there is a difference. And a number of PL enthusiasts began with the 400, so there is a nostalgic attachment to this amp.

Thanks for the offer of the Hafler P-500. Shipping would cross out any plans to do so, as it would be too worrisome of possible damage to the Hafler - even in a cabbage case.

Nando.
 

kevin

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No Problem !!! Yea.... One of these days I do want another 400.... I know where a bunch of them are about 2 min. from my house !!! LOL... Maybe on day I'll catch him in a spot and grab me one !
 

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Good luck fishing, Doug. We just got back from my friend's place in Falkland. Vernon was hot as hell at about 38* C. Ask your brother whether he knows Chad Kerr. Chad knows him.

Nando.
 

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No Problem !!! Yea.... One of these days I do want another 400.... I know where a bunch of them are about 2 min. from my house !!! LOL... Maybe on day I'll catch him in a spot and grab me one !

We're about to do away with that difference fellers.Also Kevin, ya might want this 400 I'm proving up Joe's latest creation on, unbelievable..
 

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Lee: When you say difference, is it commonly known that the sound of the PL 400 is more pleasing than the 700, or 700 B? If so, what other changes would be needed, besides the current White Oak upgrades to the 700, to make it sound similar to the venerable 400?

Nando.
 

kevin

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We're about to do away with that difference fellers.Also Kevin, ya might want this 400 I'm proving up Joe's latest creation on, unbelievable..
OK...We will for sure talk about that Lee ole buddy !!!!! Just where am I missing the thread on this creation ???? LOL.. Gotta be one somewhere ??
 

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Lee: When you say difference, is it commonly known that the sound of the PL 400 is more pleasing than the 700, or 700 B? If so, what other changes would be needed, besides the current White Oak upgrades to the 700, to make it sound similar to the venerable 400?

Nando.

I can tell ya all about it here in a bout 15 minutes..........................................
 

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OK...We will for sure talk about that Lee ole buddy !!!!! Just where am I missing the thread on this creation ???? LOL.. Gotta be one somewhere ??

That was all being held as proptietary until about 15 minutes here Kev. Then I'll post the complete build thread.....
 

kevin

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Nando.... Sutton and I have ask that very question before.... LOL...Lee has a great answer !
 

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#13
The one about the 400 sounding better until about 250 watts then the 700's smack it down like a red-headed stepchild???
 

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I wouldn't be apt to forgetting that line, Lee. Here's a little Clapton tickling the PL 400 meters from a previous recording I made to MiniDisc:

Click on image to play video:



Nando.
 

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I played these tunes earlier from Keith Richards and Trooper, a good ol' Canadian band:

Click on image to play video:





Nando.
 

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To answer your question from earlier Nando. The 400's to my ear have always been cleaner sounding, until about 250 watts. Less output devices, less common mode conduction, lower voltage rails, less wiring period. No volume pots. The 400's took a purists approach, the 700's just brute power. Joe's improvements have just made things better and better. My next personal project will be making my 700B fully comp and evaluating that. I'm konds excited about that.
 
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#20
This thread sounds like the eternal debate between the DC 300 and the D 150. Some people says that the D 150 is more "musical" and I could even agree...yeah, as long as the room is "small". On big venues the DC 300 just sweep the floor with its little brother. So in order to enjoy both, I have my Tannoy DMT 15 System II with the big one on the bass and the little one on the highs. Results: it simply sounds amazing! :bounce:
 
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