• Availability

    Due to high volumes of requests, we are currently Scheduling 8 weeks out. Turn around is 3 weeks on refurbs, 1 month on repairs. Thank you so much vising!

  • Hello,

    Welcome to Nelion Audio, LLC (formerly Carvermk2.com). We're a Carver service center, recommended repair, restoration and upgrade business focused on creating the very best vintage audio experience for you.

    We'd like to extend our gratitude to you for visiting our site. We take a lot of pride in our services, products and workmanship. In a world where everything is quick, easy and disposable, we are about quality, durability and dependability. We are highly experienced audio experts ready to make your prized vintage gear shine - from the clean and polished face plate to creating the best sound stage for your ears.

    Feel free to register on the site to receive our newsletter for special benefits and offers.

    Please consider working with us. We are more than just a repair shop. We want you to enjoy your music and all the gear you've worked hard for - worry and trouble free. Ultimately, we would like to be with you as you journey through the high fidelity audio world, discovering and creating new and exciting experiences and products. We are here for you!



    Greg Garska, CEO

    Nelion Audio, LLC

    ~Where Music Lives On~


  • Newsletter

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  • B&O , Yamaha, Onkyo and others FOR SALE


    MAKE AN OFFER - For each or for the whole lot.

    Single Owner, beautiful, clean and well cared for.


    B&O 3500 receiver SOLD



    B&O Beocenter 9000



    Beovox S45's




    Beogram 3000





    Harmon/Kardon Citation 5.0 AV Controller SOLD

    Onkyo Stereo Cassette Tape Deck Model TA-RW544 SOLD


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    ONKYO M-501 SOLD----------------------------------------------------------------------------------



    Also B&O Pentas - vintage MINT in their original boxes!


    Once in a lifetime deal! Don't miss it! Name your price!


    Contact Service@Nelionaudio.com or call 231-388-2309


    Prefer Pick-up, but will ship from Byron Center Michigan.

  • VINTAGE Fulton FMI 80 speakers FOR SALE

    Clean, tested and ready for music.

    $200 OBO + shipping & tax















  • Nelion Audio Exclusive Products

  • New Gundry Filter circuit available!

    We can install this circuit on just about any preamp. Originally designed for Carver Sonic Holography, this filter can be incorporated into many kinds of audio signal processing or media sources. The filter can be turned on or off by a jumper, or with a switch wired into it.



    The circuit requires +/-12 supplies and space to mount.

    Dimensons: 60mm X 70mm (2 3/8" x 2 3/4")

    It's function is to attenuate frequencies which our ears are naturally very sensitive too, such as baby crying and sirens. By adjusting the frequency response of some audio processing, such as Sonic Holography, the result is a better sound image, especially at high volume levels where certain mid-range frequencies dominate our ear/brain system and smear our perception of depth and detail in the music.

    Special Offer!

    Price: $24 (PCB with parts) or $40 installed (in addition to standard service fee).


    Contact us at Service@nelionaudio.com to purchase yours today! We assemble these by hand here in the USA!

  • News

    News and Articles

  • Need help? Ready to schedule a repair or restoration?
    Click below!
  • Services

  • Testimonials

    "Dear Greg and Jenny,

    I received my Carver M1.0 mkII op2 amplifier back and hooked it up.  It sounds fantastic and looks great with the blue led’s.  It is such a warm sounding amplifier.  Very quiet. Like Picasso painting on black canvas when I listen to my tidal Master recordings. Better imaging, more transparent, warmer, cleaner, I could go on and on but you already know all of this.  I’m so impressed and want to personally thank you for your incredible talent." - Sheldon H.


    "Hi Greg,

    The amp arrived earlier today. Put into a system with a Sony TAE 86 preamp and ADS 1230 speakers.

    I had been using the matching Sony TAN 86 Class A amp. I’m the original owner since 1980 and had them completely redone last year. And I thought they sounded great. 

    The difference is huge. I am blown away. The music brings tears to my eyes. To say the upgrade [M1.0t mkII opt002] is worth it would be a gigantic understatement. 

    Thank you." - David W.



    INCREDIBLE SOUND!" - Kenneth K.


    "Hi Greg,

    The amp was delivered this morning, and I’ve got it hooked up.  It sounds GREAT!!!

    Thank you so much!  I will make sure to share this positive experience with all my solider buddies who probably need theirs refurbished too.

    I have goose bumps. :D " - Gerry S.