Phase LinearPhase Linear 700 AmplifierusedClassic: Phase Linear 700 Power Amplifier (350W/2 CH) ;  FULLY SERVICED, DIALED IN & READY TO USESale: only $449… Collectible Legacy 1970's: Phase Linear 700 Power Amplifier, just serviced and ready to be enjoyed by you: Collectable Amplifier designed by: Bob Carver See pictures in 6 or 7/1...449.00

Classic: Phase Linear 700 Power Amplifier (350W/2 CH) ; FULLY SERVICED, DIALED IN & READY TO USE

Listing ID: lisb6ifj Classified 
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Ending: 06/13 at 01:37 PM ET


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Ships fromLos Angeles, CA, 90077
Ships toUnited States and Canada
Package dimensionsunspecified
Shipping carrierUPS
Shipping costSpecified after purchase
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Sale: only $449…

Collectible Legacy 1970's: Phase Linear 700 Power Amplifier, just serviced and ready to be enjoyed by you:

Collectable Amplifier designed by: Bob Carver

See pictures in 6 or 7/10 condition (see pictures)...

Just tuned up, tested and fully gone through (transistors checked and measured. matched) replacing any components that were out of spec, and it sounds great, powerful! We also have a NOS pair of Magnepan MG-10's that would sound great with this. Would make a very good pairing without having to spend much money. Maggie's need power and this amp can provide it! Call David to discuss.

One of the lights on the right of the VU meters is dimmer than the one on the left (see first two pictures above).

                      The Absolute Sound reported:

TAS Legacy: Phase Linear 700 Power Amplifier

TAS Legacy: Phase Linear 700 Power Amplifier

Weighing 45 pounds and selling for $749, with a certified output of over 350 watts per channel, the Phase Linear 700 amplifier set the audio world on its ear. When it was commercially released in 1971, few took 27-year-old Robert W. (Bob) Carver’s claims for it seriously. Remember, this was Carver’s first commercial product and he was then completely unknown to audiophiles. Before the Phase Linear 700’s appearance, an average high-powered amplifier offered somewhere on the order of 80–85 watts per channel, with the Crown DC-300 sitting atop the output throne, providing (an often unstable) 150 watts per channel.

The Crown, originally designed as an industrial device and only made available as an audio amplifier as an afterthought, had a nasty habit of blowing up under real-world conditions, especially if someone accidentally shorted or overloaded the circuit. It had no effective way of protecting its output transistors from damage, and quite frequently they would let go in a puff of smoke at the slightest sign of overload or incorrect load impedance.

Aside from using the remarkably robust DTS 410 transistors, which were only manufactured by Delco and made specifically for automobile ignition systems, part of the genius of Bob’s creation was something he called an Energy Limiter. With this early form of protection as safeguard, you could literally short the amplifier—even overdrive it—and the output transistors typically would not fail.

To support cooling (eliminating the need for a loud and noisy fan), lower the overall operating temperature, and facilitate component servicing, Bob cleverly mounted both the output transistors and the power transformer to the exterior of the chassis. The output transistors were visible from the back, mounted directly to the rear heat sinks. The front panel of the first-generation 700 was asymmetrically laid out, with the large VU meters and control knobs mounted towards the right side. At a width of just 19 inches, the unit was easily rack mounted.

Given its then-gargantuan output, remarkable reliability, and convenient mounting capability, the 700 soon became a favorite of recording studio engineers, rock bands, and jazz musicians. And it wasn’t long after Harry Pearson’s very favorable review in the very first issue of The Absolute Sound —celebrating the 700’s tight bass, midrange clarity, and high-frequency definition—that the amp would be adopted by and become the darling of the audiophile community, as well. In fact, not only did the Phase Linear 700 herald the start of one of the most successful, prolific, and lengthy careers in our industry; it also set the stage for the ascent of solid-state audio electronics—and for the arrival of more and more powerful contenders yet to come.

Weinhart Design specialize's in whole Estate Audio & LP Collections Buy & Sell, New, Demo, pre owned and are a authorized full service Dealer for Bowers & Wilkins, Synergistic Research, Aqua, Bryston, Rel, Project, EAR, and many others. Please contact us if you have an estate of audio gear that needs managing, purchasing or if you just have questions. We have a long history and very good at it; we will strive to make it easier for you.

It is best to give us a call as we are here to make and build the best systems !

* * * We are always interested in purchasing quality Audio items, LP collections and quality trades are welcomed. * * *  Please call David Weinhart and to help you make the best sound possible and available weekdays from 11-4PM @ 310-472-8880 or on my cell text or call seven days a week including weekends from 10-7PM at 310-927-2260

Weinhart Design has lots of other items new and used and if you’re in Los Angeles or visiting please accept my invitation to experience our Audio Showroom by appointment and please visit our web site

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VISA, MC and Papal are gladly accepted within the U.S. and Canada as long as the charge is approved and were shipping to the BILLING ADDRESS and shipping to the billing address on record and adds a 3% fee to cover costs. We also accept AMEX & Discovery cards at the cost of 4%.

We accept Bank Checks without fees and do have some other no fee options (best to call David Weinhart the founder / owner for other no fee options and to consider any trades).

AMEX & Discover are also available for a 4% cost if shipped to the Billing Address and approved.

Please note: All credit card and PayPal transactions are subject to a 3% processing fee and to pay  either give us a PayPal address or call to charge VISA or MC (3% cost added) and / or we can provide other payment options best to call or Text David Weinhart in Los Angeles any time from 10am - 7pm at: 310-927-2260. Also we have some non fee options like Bank Checks and Bank Wire transfers.

Please call me directly in my world class showroom in Los Angeles weekdays:
from 11-4PM @ 310-472-8880 or on my cell including weekends from 10-7PM at 310-927-2260 and I can answer your questions and help you with all of your design, new and preowned needs.


Making better Sound

One system at at a time,

David Weinhart
Weinhart Design, Inc.
President & CEO 

The Audio and Video Expert 
e: [email protected]

2337 Roscomare Road, Studio #1
Los Angeles, California 90077

Showroom: 310-472-8880
Cell: 310-927-2260 PST seven days text or call from 10am - 7pm


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