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Quality Components at the Right Price!

Tech Hifi LLC  1 Liberty Street, Suite 2
Hanson, MA 02341-1127 USA

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Audio Restoration | Tech Hifi

Audio Restoration

Welcome to the Mark Acoustics Lab: Tech Hifi's Audio Service & Restoration Center

Our unique "Restored as Original" service process is dedicated to ensuring your vintage components look and perform their best.

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We specialize in service and restoration of vintage audio components and speakers from 1960 to present.

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Refer to our audio component service & restoration process below.
For a list of products we do not work on, click the "what do we service button below!

Prior to service inquiry:

Updates will be posted on this page or on our Facebook page.

Service Inquiries as of 3/13/24:

We are not accepting equipment at this time for service/restoration.

Updates will be posted here and on our Facebook page


For every piece that comes into our lab we document your reported functional problems and any physical defects. Then we undergo a physical and technical evaluation of your component(s) in our lab to determine the cause of failure. Once completed, we'll send you a quote for parts and labor based on what is found for you to review. No further action is taken without your approval. Should you find that the cost to repair is higher than expected, we charge just $125 to cover part of the average of 90 minutes on the bench this process takes.

1 - Evaluation Phase

Once the quote is approved, OEM or better parts are ordered and any additional troubleshooting commences where required. In many cases there may be underlying problems that may not be obvious until the new parts are replaced.

For a “real world” analogy; you bring your car into the mechanic for shock absorbers, only to find out the tie rod ends on the front suspension are worn.

2 - Restoration & Service

During the component's service and evaluation, audio testing can average 3 to 5 hours. In the past, we have placed serviced components in our demo room playing music in the store for up to a week. We do this at no additional charge to ensure we have found and corrected reported intermittent problems.

3 - Strenuous Testing

Our unique vintage audio component service & restoration process

We're proud to say the Mark Acoustics lab has serviced hundreds of components in our 10+ years of operation.

See What We've Done

Our work

Testing | Tech Hifi

When a piece comes in, our goal is to make it perform and sound as close to the original as physically possible. 


Our guidelines are based upon original factory service documentation. To put it simply; we do not rush service, make assumptions, or unnecessarily replace parts in mass quantities.

Why "Restored as Original" (RAO) matters

At Tech Hifi, all replacement parts and labor performed are backed by our 90 Day Performance Warranty.

'...your circuits dead and there's something wrong' 

No worries! We can repair and restore to give "life" back to your vintage audio components.

Vintage Audio Component | Tech Hifi
  • automatic turntables: Dual, Garrard and others

  • open reel decks: our calibration tapes are delaminating making them unusable and won't be replaced at this time due to high cost.

  • physical or water damaged, smoke contamination, modified and/or improperly serviced components

  • console stereos 

  • car stereo components

  • home theater receivers

  • flat screen televisions 

  • VCR, DVD, Blu-ray or laser disc players 

  • jukeboxes

  • portable audio devices and electronics of any brand or type

  • professional audio equipment

  • Manufacturers we do not service: Bose, Cambridge SoundWorks powered speakers and components, and many other manufacturers who do not supply documentation and parts to aftermarket service labs.  Ask for details.

Components we do not service:

What do we service?

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