🔥Vintage Mcintosh MC250 Stereo Power Amplifier Receiver Pro Restored!!!🔥

MCINTOSH MC250 POWER AMPLIFIER

Up for your Consideration is a Comprehensively Restored Mcintosh MC250 Power amplifier. From the start of this restoration, we set out to honor the legendary Mcintosh Name now celebrating their 75th anniversary! we have strived to make this not only the best performing, best sounding, but also the best looking MC250.

Amplifier is in excellent condition with light scratches, and wear. The Mcintosh chrome chassis from this vintage are known to develop a slight patina over the years on the whole chassis and this one is not an exception. unit displays beautifully! More pictures available upon request.

Info About Mcintosh Amps:

Legendary Mcintosh Power amps are highly Sought after for their superb overbuilt quality construction and sound. the MC250 is among the first all Solid State amplifier designs from Mcintosh. After a long trajectory developing some of the best tube amplifiers of the era Mcintosh started making solid state amps the early ones were designed to sound as close as a tube amp as possible and they also share their classic open tube chassis design which makes them standout when you walk in the room.

The MC250 is among one of our favorite power amplifiers nothing else looks or sounds like a Mcintosh Power amp. Mcintosh audio transformers like the ones on the MC250 are only used in the top-of-the-line Contemporary amps made by them today they add unique sound signature and ensure you get full rated power to your speakers regardless of load.

Details of Restoration:

1. Full electrolytic capacitor replacement using the best Vishay Axial capacitors that conserve the original board design

2. Any electrolytic capacitor rated at 10uf or less, has been upgraded with Wima film capacitors.

3. The old tired power supply board has been completely rebuilt from scratch! We used a CNC Machine to custom design a turret board of higher quality and match original footprint. The turret board is the same kind we use in our tube designs it has been laced with 16 gauge all copper bus wire, every component on the board was replaced.  All resistors were replaced with higher wattage metal film precision resistors, all diodes including main rectifier diodes were replace with fast acting soft recovery ones.  The ceramic capacitors were replaced with new higher voltage multi-layer ones.

4. Every single capacitor on the left and right Amp boards have been replaced they have been upgraded utilizing the absolute best components for each specific section chosen not only for reliability but with best sound in mind.

5. Main filter caps were ordered directly from Mcintosh labs these are the same they use for their repairs. Dimensions And mounting are the same as originals so they preserve the original look of the mc250

6. The two other top chassis flange mount caps which include a multisection and single section cap were replaced with custom made caps that preserve the original look and flange installation of the originals, these new caps are housed inside an all-stainless-steel enclosure.

7. Every single electrolytic on the input board has been replaced with much more robust capacitors with reliability and sound in mind. All the resistors were replaced with special order Japanese Takman boutique carbon film resistors to preserve the warm sound of the amp.

8. The original speaker terminal strips on these units have aged considerably most have tarnished and show signs of oxidation, we have replaced them with brand new gold plated audiophile five way binding posts on our custom made speaker terminal plates. We cnc these plates in house out of high quality heavy duty 1/4" nylon plates, then audiophile 5 way binding posts are fitted and installed using all copper 18 gauge bus wire and soldered with cardas audiophile solder for maximum audio fidelity. These new terminals are a massive step up in quality from worn out and tarnished originals, they provide a much more solid and electrically sound connection. The new speaker plates also allow the use of modern banana plugs which make connecting speakers to the amp extremely easy.

9.  Original gain pots were replaced with authentic replacements ordered from Mcintosh labs these new pots were treated with deoxit gold for contact preservation.

10. Original Rca Jacks were replaced with gold plated Cardas audio jacks

11. Stereo mono switch has been completely taken apart and cleaned to like new condition and treated with deoxit gold for contact preservation.

12. Heatsink cage and bottom cover were completely sand blasted and powder coated with satin black to match original paint. Hardware was replaced with stainless steel screws.

13.  Chrome chassis was hand polished and cleaned and treated with chrome protectant.

14.  All audio path solder work was performed with Cardas silver audio solder.

15. All functions tested on bench and under load for a period of 24 hours.

16. Power test was performed with an eight-ohm dummy load and a continuous 1khz sine wave both generated and then analyzed out of the amp by a professional state of the art ultra-low noise audio analyzer. both channels were checked at factory rated power and beyond at about 50 watts per channel Analyzer reports a THD of about 0.1% for both channels quite impressive and meets Mcintosh Factory published specs

17. Unit has been tested for a period of 7 days full rotation under real world listening with several different speaker loads.

18. Adjustments and measurements were done with calibrated Agilent, Fluke, Audio Precision, Sound Technology and Sencore measurement instruments, Tektronix and Siglent oscilloscopes and high end ultra-low noise highly accurate Audio Analyzer among other professional audio repair tools.

Final Notes:

Once the Device has Passed all Rigorous Lab stress testing, it undergoes a full 7-day audition in our listening room under real world use! its connected to multiple sources and speakers of varying loads and design. Once a device performs as well as it sounds it is deemed comprehensively restored. The impact of all the high-quality modern replacement parts and audio grade capacitors combined with the now completely rebuild from scratch power supply and New speaker terminal connections allow the original amp design to really shine!

We'll say it again Mcintosh power amplifiers are legendary this complete comprehensive restoration and upgrade has allowed the original genius electronic design from the masters at Mcintosh sound and perform better when it left the assembly line in the early 70s, we have tested and paired this amp with many of our reference preamps solid state and tube and sounds incredible. the Mcintosh audio transformers made this amp sound absolutely lovely with any speaker type and load we used.

We'll end this long description by saying it has been a privilege to have been able to restore this mc250 and bring it to up to spec with the best components possible it has the sounds and looks that have established Mcintosh into not only a HI-FI legend but also an American icon.

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About Solid State Audio

We are a small business Located in New Orleans, Louisiana born out of a lifelong love and appreciation for vintage Hi-Fi audio. Our mission is simply to restore and preserve some of the finest audio gear ever made.

Like many of our clients, we are also passionate Audiophile and music lovers. Listening to music is an experience and nothing creates quite the atmosphere as the sounds and aesthetics of a vintage Hi-Fi audio system.

Unlike other shops, at Solid State Audio, vintage Hi-Fi audio equipment sales and restoration is all we do! We have the appreciation, experience and proper test equipment for your audio gear.

We have many years of experience performing restorations exclusively. Our restoration lab features a comprehensive collection of audio test equipment from some of the renowned names in the industry like Sound Technology, Audio Precision, Tektronix, Keysight, and Panasonic just to name a few. In addition, we have a full workshop including a CNC Machine to help us custom design new parts or printed circuit boards to perform proper repairs or upgrades to equipment.

From inception, it has been our goal to provide our clients with not only a comprehensive restoration but the absolute best customer service and communication experience during and after their restoration or purchase. Please don't hesitate to reach out with any questions about our restoration process or audio gear for sale.

Please Visit us at solidstateaudio.com for all your Vintage Hifi Needs!

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Terms and Conditions PLEASE READ IMPORTANT:

As with any electronic device or appliance, both vintage and new, there is always a chance that something will fail. Even though new parts are used and all adjustments and care have been taken in the repair or restoration, this possibility exists. For that reason, any vintage or new device sold by us; is sold in AS IS condition and all sales are Final. Our feedback speaks for itself and the amp will be packed professionally and shipped via FedEx, with signature required.

Thank you for visiting Our listing! All sales are final! please read entire listing to see what’s included. test equipment is used for reference and demonstration purposes and is not included in listing. Please ask any and all questions before purchasing an item. Items will include free shipping only within continental U.S. I’m sorry, but at this time we do not offer international shipping.