The Phase Linear Experience thread

There are few people in the audio industry as polarizing as Bob Carver. In spite of that, I've opted to start an appreciation thread of his old company, Phase Linear. Feel free to contribute your experiences, good or bad, with components from this company.

I'll start with the 4000 preamp. I've mentioned before that I've recently been tasked to clear out thousands of square feet of my father's legacy. He fancied himself as a antiques dealer. He dabbled in a lot of other areas as well. When (literally) digging through piles of stuff I unearthed a Phase Linear 4000 preamp. I almost wet my pants when I saw and recognized one corner of the front panel. Frantically, I pulled it out and was flooded with thoughts from my childhood.

Back in the 70s, my dad had a Kenwood receiver which luckily was fully equipped with preamp outputs. He was also friends with the sound guy from a local rock band who had recently upgraded their sound system with a Phase Linear 400 power amp. He kindly loaned the amp to us for a couple weeks between gigs. This sound guy had placed the amp in a wooden box with a fan built in to help it keep its cool while working at shows. I thought this amp was beautiful, plus it made the Large Advents really come to life with music. Bob's philosophy of "a dollar per watt" was ground breaking, and a hint that high power amplification could be a reality in the home. My mom hated that big ugly black wooden box in the living room. I was sad to see it returned to its owner.

A year or so later, my sister befriended an exchange student in high school who was some sort of prince from Thailand. I could never figure out the complete story with him. At any rate, he lived in an apartment with his bodyguard/servant. One day he tells me he wants to get a stereo to play rock music loud like my dad did. Without skipping a beat, I tell him to buy a Phase Linear 4000 preamp and 700B power amp, because, well, that's what I was coveting at the moment. A few days later he invites me over for some tunes at his pad. Sure enough, he had the gear I suggested. Plus, he bought - and memory may be failing me here - Epicure Mini Tower speakers. I think that's what they were called. Tall tower speakers with a smallish square footprint. Notably with drivers on all four side panels. That was an impressively loud stereo. Didn't really sound that great with plaster walls, smooth plaster ceiling, and hardwood floors with speakers that projected sound in all directions. But, he was happy because it was indeed loud as fudge. He apparently had access to an endless supply of money, so I like to hang around him. You always knew when he was home because you could hear music flowing from his third floor apartment from an amazingly far distance. I assume his bodyguard was tasked with paying off all the complaining neighbors.

One day the prince comes over to our house and asks if my dad would like to borrow his 4000 and 700B for a while. Sure, why not! Turns out that one of his speakers burst into flames from all the power being pumped into it. The stereo shop where he bought all this gear had his speakers on display after the fire. There was a two inch hole in the grill cloth that had been burned there by the flame shooting out of one of the woofer's voice coil. Turns out the story went a little deeper in that his father finally got wind of what this kid was up to in the US. He was mad at the bodyguard for not informing him what all the money requests were being used for, and at the prince for being such an irresponsible thorn in the community's side. They were both ordered to return to Thailand.

For the three or so months to finish the school term before returning, our family got to keep the 4000 and 700B. I thought the 4000 preamp was the coolest preamp that could possibly be conceived of by man. The autocorrelation circuit was the work of a genius in my opinion at the time. The peak unlimiter/downward expander circuit was also revolutionary in my eyes. But, much more than that, I felt that the aesthetics were stunningly beautiful. The left/right and up/down symmetry was something I could gaze at for hours and be fully satisfied. The prince came over a number of times to listen to his gear playing music, but I stayed in control of the volume. I was more sad to see the gear leave our house than the prince leaving the country.

Now that I've got my own Phase Linear 4000 preamp, I'm not sure what I'm going to do with it. I suspect that even if I go through it and bring it back up to snuff, it won't offer much sonic competition for today's preamps. The front panel has gotten a bit rough from decades of being stored in an unoccupied house. If nothing else, I may attempt to just make the front panel pretty again and leave it at that. I could then display it as visual art and get some satisfaction just by looking at it. My dream is to get it functional and pair it with an ESS M500 amp driving some ESS AMT2 speakers I have for a retro system in the dining room.

Phase Linear 4000 front.webp

Oh, and the wooden case also came with this preamp. OK, now it's your turn, please share your tales related to Phase Linear experiences.
 
Too young (lol turning 60 in a few weeks) to have any PL experience. But my first real pre was a Carver C1 and I thought it was great. Our band had a stupidly powerful Carver pro amp and it never had a hiccup across many years and gigs.

Much respect to Bob Carver the engineer. A bit less respect to Bob Carver the business man as he never seemed to find a good fit in the hifi world for long term success.
 
An old friend, with whom I've long ago lost contact after he moved away,
had a beautiful Phase Linear 400 amplifier in the mid to late 1970s.

It wasn't like the two-rack-space-size amplifiers with handles that Carver would later make under his own name.
It was a good sized, impressive box.

Don't ask me why, but I remember the whole system.
He had these horrific Bose 901 speakers with which he had buyer's remorse.
He wanted to move up to JBL 100s, but I don't know if he ever got there.

He had a nice looking Philips turntable which had, if I'm remembering right, only a ten-inch platter.
[Anybody remember those?] I remember the cartridge as a Stanton.

He used the preamp outputs from a Pioneer receiver,
and he used the receiver's own amplifier to power a couple of little AR 4s that he had bought with it.
He used RCA "Y-connector" cables as I recall, so the preamp output could go both to the new amplifier as well as back to itself.
He placed the ARs at the opposite [back] end of the room.

I'll say this. The system didn't lack for volume, this despite the low efficiency of the speakers.
My two hundred twenty-five pound, fifty-one year old son
was a tiny toddler at the time,
and being with me on the visit, he seemed to like the system.

I think he mainly liked the 1812 Overture, though.
 
I went through a phase linear phase and even got to try out a prototype protection circuit from watts abundant early in the process as well as what would become the WOPL mods on my 400 series 2. Loved the funky BSG Cylon VU meters on that amp. My 4000 and 4000/2 pre amps were never able to stay healthy for long and I eventually moved them along. I do wish I held onto and fixed the Dual 500 I had acquired. But I found myself with too much broken gear and not enough resources to get it all healthy. Le sigh.
 
I'd love a 4000 just for the aesthetics! I used to have the Autocorrelator they sold separately as the Model 1000. If used correctly it was really pretty good at reducing hiss.

In my early eBay days I bought a 400. It was crap. I sent it back. It was the only purchase where I asked the seller for a refund. I'd love a super clean 400, but the horror stories are too common.

Very cool stuff though.
 
In college in the early 70's the best stereo store on campus had Phase Linear amps and preamps in the "room in the back" with all the best gear. I would drool / marvel over them, but so far out of my budget at that time.

When I was actively scrounging for vintage gear about 1995 to 2005, I found a lot of cool amps but never Phase Linear. You should restore that beautiful preamp - who cares if it sounds as great as some modern gear - that thing is history and will sound very good.

Cheers,

Snade
 
Thanks for sharing your own stories. I've been almost convinced to go ahead and attempt a restore on this preamp.

I remembered last night that 30 or so years ago I worked with a guy who had bought Bob's first product, the 700 amp, when it first came out. He was proud to tell you right off it was serial number 14. Personally, I never liked the front panel aesthetics of the 700. Small meters, asymmetrical allotment of real estate just didn't appeal to me. Comparatively, the 400 and 700B were stunning beauties.
 
I’ve had 2x 4000, a 700B, and a 400, as well as a later Pioneer/PL tuner and pre. All of them came to me needing work, and left the same way.

The 4000 and amps were attractive, I’ll give them that, but if felt like most of the cost went into the amp power transformers.
 
My friend had Voice of the Theater speakers, Phase 400 and a large Sansui integrated as a preamplifier.

Emerson, Lake & Palmers Album Brain Salad Surgery had just been released.

This was a huge 5 bedroom 100 year old mansion type house... It was flocking Loud!

I'm looking out the living room windows when I see a police mans hat sticking above the wood shades.

Gary explained to the officer he just bought a 400 watt amplifier, The Cop said, "Sounds like a Dam Submarine out here".

LOL... Good times...
 
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From what I've read and heard, Carver had problems with several sets of financial backers. He wanted to provide the most bang for the buck; they wanted higher profit margins. Too bad as the equipment he has designed is some of the most unique ever.
 
I have owned the 4000 pre and the matching 700 monster power amplifier.
These units sound good, have more power than 99% of all speakers require and are reliable.

The problem is they are heavy & bulky. For the sake of simplicity other than a coupled fuses there is zero protection devices. Resulting in when there is a problem, its always catastrophic.
 
Apologies right off, as I haven’t owned any Phase Linear badged equipment, but I have what became Carver, a C-4000 preamp and C-500 amplifier. I had listened to the Phase gear many times at my local Playback at the time, and lusted for it. Unfortunately, my wallet held pretty much dust then.

A few years later and a solid job, the Carver gear was purchased. I always thought the C-4000 preamp had a sort of “gray” sonic signature, hard to explain in my simple terms. It was still a fun preamp, plenty of goodies to fiddle with, including the holography generator. The C-500 amplifier, however, was to my ears was quite good, powerful, and clean. I would own one today if I could find a pristine condition sample.

I look back on those earlier audio times with very fond memories!
 
I bought the 4000 new and the 400 amp which blew not long after I bought it. And again, and again. Bad power supply but it was proprietary so there was no substitute.

I bought it @ Crazy Eddys in the store where Sting and Knopfler were influenced to write 'Money for Nothing.' 57th Street off of 3rd Avenue.

I sold it all after it was repaired for the last time.
 
I haven’t heard the name Crazy Eddies in a very long time. Never had the pleasure of getting to visit even though I lived in New Jersey during their fading years. .

In Phase Linear’s defense, the 400 was the only amp at the shop where I worked that would drive the Bose 901’s to a decent volume level (read LOUD).
 
In my HS wood shop class in 1979-80 I built the Speakerlab 6s and my best friend built the 7s - with a 10" and a 12" woofer in each (i was a bus boy and he was moonlighting with his dad on the docks).

He bought a Carver C-3 preamp and M400 cube amp. It was always clipping out and I didn't think it sounded that great. Flashy, yes.

My HK670 receiver sounded way better and was almost as loud and almost never clipped out.

Never really thought about Bob Carver's stuff much after that.
 
In my HS wood shop class in 1979-80 I built the Speakerlab 6s and my best friend built the 7s - with a 10" and a 12" woofer in each (i was a bus boy and he was moonlighting with his dad on the docks).

He bought a Carver C-3 preamp and M400 cube amp. It was always clipping out and I didn't think it sounded that great. Flashy, yes.

My HK670 receiver sounded way better and was almost as loud and almost never clipped out.

Never really thought about Bob Carver's stuff much after that.
Sadly, his gear kept getting better after that. To me, peak Carver was his Sunfire gear. It started getting better sounding with the tfm gear.
 
In my late teen years to early twenties, went to a party in a college dorm and they had a nice Phase Linear system connected to a pair of Infinity speakers with the EMIT tweeters, match made in heaven.

They were playing the Police Synchronicity album and the highs were extremely pronounced.

I heard that system and it has been forever locked into my memories. Almost as if to say "you have my attention" :)
 
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