Restored Phase Linear 4000 Autocorrelation Preamplifier in Excellent condition The 4000 Autocorrelation Preamplifier was a collaboration design by Bob Carver and Bill Skinner. It was designed to expand or decompress the sonics of recorded material. In audio parlance, its called dynamic headroom. In the midst of all the knobs and toggles was the four channel balance joystick. The 4000 had the capability of controlling up to six components: a tuner, two tape decks, two turntables and an auxiliary input. It had three switched and three unswitched AC plugs. The 4000 was manufactured from 1973 to 1977. It retailed for $600 but the price rose 10 % in 1977. Its still highly sought after today. We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching. The following work has been completed;Repair of the autocorrelation functionTraced and repaired lans and solder joints where needed total of 15Final bench and test found to be working within factory specs Service fee $ 189.50 Sounds great. From a smoke free home 30 day warranty.

This is a RARE reprint of an Phase Linear Audio Brochure from 1979! It has information for the 2000, 3000, and 4000 Preamps. All series II. Very rare and hard to find! It has Features, Specs, and Information about the item(s). A piece of Audio History! I have THOUSANDS more Ads, Brochures, and Reviews on my Ebay Store. Email with ANY questions, THANKS! -If you want FREE SHIPPING, I can email you a digital version of this file so you can view and print it at home. Please email me if you want it that after you buy. -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisement is a reprint from 1976, it is printed on glossy photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

This is a RARE reprint of an Phase Linear Audio Brochure from 1979! It has information about the D-500, 700, 400, and 300, all series II. Very rare and hard to find! It has Features, Specs, and Information about the item(s). A piece of Audio History! I have THOUSANDS more Ads, Brochures, and Reviews on my Ebay Store. Email with ANY questions, THANKS! -If you want FREE SHIPPING, I can email you a digital version of this file so you can view and print it at home. Please email me if you want it that after you buy. -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

This is a RARE reprint of an Phase Linear Audio Brochure from 1979! It has information about the D-500, 700, 400, and 300, all series II. Very rare and hard to find! It has Features, Specs, and Information about the item(s). A piece of Audio History! I have THOUSANDS more Ads, Brochures, and Reviews on my Ebay Store. Email with ANY questions, THANKS! -If you want FREE SHIPPING, I can email you a digital version of this file so you can view and print it at home. Please email me if you want it that after you buy. -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

This is a RARE reprint of an Phase Linear Audio Brochure from 1979! It has information for the 2000, 3000, and 4000 Preamps. All series II. Very rare and hard to find! It has Features, Specs, and Information about the item(s). A piece of Audio History! I have THOUSANDS more Ads, Brochures, and Reviews on my Ebay Store. Email with ANY questions, THANKS! -If you want FREE SHIPPING, I can email you a digital version of this file so you can view and print it at home. Please email me if you want it that after you buy. -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisement is a reprint from 1979, it is printed on matte photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisement is a reprint from 1976, it is printed on glossy photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

The amazing and groudbreaking Phase Linear 4000! Here is the first test ever of it from 1973 by Stereo Review. It has pictures of the inside and front along with full tests of all its capabilities! A must for any owner of the Carver or Phase Linear Preamp. Bob Carvers amaing design put through its paces. You will love it! -This is a an exact re-print of a classic Audio Review or Brochure. -Each page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

The amazing and groudbreaking Phase Linear 4000! Here is the first test ever of it from 1973 by Stereo Review. It has pictures of the inside and front along with full tests of all its capabilities! A must for any owner of the Carver or Phase Linear Preamp. Bob Carvers amaing design put through its paces. You will love it! -This is a an exact re-print of a classic Audio Review or Brochure. -Each page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

DESCRIPTIONFor parts or not workingBrand:Phase LinearType:Autocorrelation Pre-AmplifierModel:4000UPC:N/A ***Disclaimer*** All items were donated to Evergreen Goodwill of Northwest Washington with no history or provenance. The auction is for all items pictured. Items may need servicing and/or benefit from a cleaning upon arrival. Please see photos for additional details and feel free to ask questions. PAYMENTSPlease note that your entire order will be canceled by eBay if the oldest item exceeds 7 days without payment. Once an order is canceled, we are unable to re-invoice and the item will be relisted. For a combined shipping invoice, please send us one request within 5 days of winning the first item to avoid cancelation of your entire order. Once a combined invoice has been sent, we are unable to add additional items to the invoice. SHIPPING Local pickup is not available at this time. Interntaional shipping is not available at this time. We offer combined shipping as long as items will ship safely together. Auctions must end within 5 days of each other to be eligible for combined shipping. Please hold off on payment until all auctions have ended then proceed to checkout. Please do not pay for any items individually if you wish to have them combined - they must be paid at the same time. Items listed for flat-rate shipping are not eligible for combined shipping. PO Box addresses will require USPS shipments as FedEx Ground will not deliver. If FedEx is selected we may need to invoice for additional shipping costs.

Vintage Phase Linear 400 Series Two Power Amplifier Factory rated at 210 watts per channel purchased by me on June 29, 1979 at a cost of $535.00 (Big money back then!). Amplifier has been meticulously taken care of (see photos) since day one and only moved (using factory box - see photos) 4 times. For its initial 10 years it powered my JBL 166 Horizon speakers and for the next 30 years it powered my JBL 4412 speakers and presently has been sitting on the same equipment shelf for past 30 years and most recently used to power my JBL 100 Classic speakers. Amplifier is ALL ORIGINAL and has never had the need to be serviced! In fact it still has the original fuses from the factory. The top plate has been removed by me a couple of times over the years to blow out dust. Amplifier is in Full working condition and both Volume knobs work smoothly and quietly. Both Meters work perfectly. Perfect candidate for a modern up grade (e.g. White Oak Audio) and then maybe it will last for another 45 years :-) Note: I’ve always utilized a Phase Linear Fan Kit to keep the amplifier running as cool as possible - but a fan is probably only needed for Demanding low efficiency 4 ohm speakers. Fan kits are available on e-bay. Amplifier will be shipped in it’s Original Factory Box (see photos) and an additional “Double box” will be used to help avoid damage to the original Factory Box in shipping. Or save shipping fee altogether by picking up in person in Santa Clarita (Los Angeles County), California. Please message me if you need more detail or additional pictures. Please Note: As a 45 year old All Original Vintage amplifier - SOLD AS IS AND NO RETURNS ARE ACCEPTED. Please check my 26 Year 100% e-bay Feedback record w/ these Detailed seller ratings: Detailed seller ratingsAverage for the last 12 monthsAccurate description5.0Reasonable shipping cost5.0Shipping speed5.0Communication5.0

I have for sale a Phase Linear 4000 Autocorrelation Preamplifier. Shows some nicks and scratches but overall it’s in good cosmetic condition. Please inspect photos carefully as they form part of the description. Estate sale find so I don’t know too much about the unit. Plugged it in and heard a click but no lights and no sound. There was a very loud pop when the “PK Unlimit DN Expand” switch was flipped but it seemed to have subsided. It may come back though. No further testing had been done. Missing all the knobs but the levers tips all seem to be present. Also missing one rubber feet on the bottom. The potentiometer's shafts are also very stiff to turn. Given the issues and very limited testing, this unit is sold STRICTLY AS-IS for parts or restoration. Please message me if you have any questions.**USA buyers, please read: Please note that I cannot generate a USA return label from Canada Post. Therefore if we agree on a return, you will need to get a shipping estimate from USPS and send me a screenshot of the details and amount. I will reimburse you via PayPal. If you disagree with this, please do not make the purchase of this item. Thank you for your understanding.

This is a RARE reprint of an Phase Linear Audio Brochure from 1979! It has information for the 2000, 3000, and 4000 Preamps. All series II. Very rare and hard to find! It has Features, Specs, and Information about the item(s). A piece of Audio History! I have THOUSANDS more Ads, Brochures, and Reviews on my Ebay Store. Email with ANY questions, THANKS! -If you want FREE SHIPPING, I can email you a digital version of this file so you can view and print it at home. Please email me if you want it that after you buy. -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

This is a RARE reprint of an Phase Linear Audio Brochure from 1979! It has information about the D-500, 700, 400, and 300, all series II. Very rare and hard to find! It has Features, Specs, and Information about the item(s). A piece of Audio History! I have THOUSANDS more Ads, Brochures, and Reviews on my Ebay Store. Email with ANY questions, THANKS! -If you want FREE SHIPPING, I can email you a digital version of this file so you can view and print it at home. Please email me if you want it that after you buy. -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

-This is a collectors item ADVERTISEMENT from 1974! Great for collectors and audiophiles! These are vintage RARE ads for Some of the best Audio and Video Equipment ever made. Check out my Ebay Store for THOUSANDS more relating to electronics. -These Ads have been APPRECIATING over the years, on average about 10% per year. They dont make any more of them! Once they are gone, they are gone! Some are over 50 years old! - Ready for framing and put on your wall! 100% original, no copies or reproductions. - I ship Worldwide! Shipping is $3 in USA,$6 elsewhere. -These ads look great framed or put in a binder, they can also add value when selling your equipment as many of them have specs and details about the audio equipment! -Please email for any questions. Check out my Ebay Store, ELECTRONICS ARCHIVES, for many more vintage ads! -Shipping discounts are given for additional items, It is $3 for your first item in USA,$6 international, then just $1 for each additional item! -All our ads are 100% ORIGINAL! They are from the year they are listed as. -Satisfaction guaranteed! THANKS! ELECTRONICS ARCHIVES Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisement is a reprint from 1976, it is printed on glossy photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisement is a reprint from 1979, it is printed on matte photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

The amazing and groudbreaking Phase Linear 4000! Here is the first test ever of it from 1973 by Stereo Review. It has pictures of the inside and front along with full tests of all its capabilities! A must for any owner of the Carver or Phase Linear Preamp. Bob Carvers amaing design put through its paces. You will love it! -This is a an exact re-print of a classic Audio Review or Brochure. -Each page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

The amazing and groudbreaking Phase Linear 4000! Here is the first test ever of it from 1973 by Stereo Review. It has pictures of the inside and front along with full tests of all its capabilities! A must for any owner of the Carver or Phase Linear Preamp. Bob Carvers amaing design put through its paces. You will love it! -This is a an exact re-print of a classic Audio Review or Brochure. -Each page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

The amazing and groudbreaking Phase Linear 4000! Here is the first test ever of it from 1973 by Stereo Review. It has pictures of the inside and front along with full tests of all its capabilities! A must for any owner of the Carver or Phase Linear Preamp. Bob Carvers amaing design put through its paces. You will love it! -This is a an exact re-print of a classic Audio Review or Brochure. -Each page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

This is a reprint of an Audio Advertisement from 1977! The picture is of the actual item, Mint Condition! Very rare and hard to find! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

-This is a collectors item ADVERTISEMENT from 1974! Great for collectors and audiophiles! These are vintage RARE ads for Some of the best Audio and Video Equipment ever made. Check out my Ebay Store for THOUSANDS more relating to electronics. -These Ads have been APPRECIATING over the years, on average about 10% per year. They dont make any more of them! Once they are gone, they are gone! Some are over 50 years old! - Ready for framing and put on your wall! 100% original, no copies or reproductions. - I ship Worldwide! Shipping is $3 in USA,$6 elsewhere. -These ads look great framed or put in a binder, they can also add value when selling your equipment as many of them have specs and details about the audio equipment! -Please email for any questions. Check out my Ebay Store, ELECTRONICS ARCHIVES, for many more vintage ads! -Shipping discounts are given for additional items, It is $3 for your first item in USA,$6 international, then just $1 for each additional item! -All our ads are 100% ORIGINAL! They are from the year they are listed as. -Satisfaction guaranteed! THANKS! ELECTRONICS ARCHIVES Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.