500 Series

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24 Items
  1. API 550A

    MFR#: 550A Best Seller
    Discrete, classic three-band EQ
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $1,195.00

    $1,015.75
  2. API 512C #908.8015 (Used)

    500 Series microphone preamp
    More Info
    Serviced to Order
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $695.00
  3. API 512C

    MFR#: 512C Best Seller
    Single-channel microphone/line/instrument preamp for 500 Series - every bit of classic API sound!
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $945.00

    $803.25
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  4. API 512C #908.8022 (Used)

    500 Series microphone preamp
    More Info
    Serviced to Order
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $695.00
  5. API 512C #908.6753 (Used)

    500 Series microphone preamp
    More Info
    Serviced to Order
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $695.00
  6. API 550A Equalizer #5777 (Vintage)

    Discrete 500 Series 3-band EQ
    More Info
    Contact us for Availability
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
  7. API 527 Compressor #0403-10 (Used)

    500 Series discrete compressor/limiter
    More Info
    Serviced to Order
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $695.00
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  8. API 500-8B - 8-Channel 500 Series Lunchbox

    MFR#: 500-8HC Best Seller
    Robust AND portable 500 Series lunchbox rack with channel-linking feature AND external PSU - fits 8 500 Series modules
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $499.00

    $424.15
  9. API 525

    MFR#: 525
    Re-issued classic discrete compressor
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty
    $1,100.75
  10. API 550A Equalizer Reissue #2548-12 (Used)

    500 Series 3-band EQ reissue
    More Info
    Serviced to Order
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $895.00
  11. API 505 DI - Discrete DI

    MFR#: 505 DI
    500 Series discrete direct input with gain control
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty
    $505.75
  12. API 500-6B Lunchbox

    MFR#: 500-6BHC Best Seller
    6-slot 500 Series Lunchbox with DB25 connectors and built-in power supply
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $699.00

    $594.15
  13. API / Dataronix 560A Graphic Equalizer #181 (Vintage)

    500 Series graphic EQ
    More Info
    Contact us for Availability
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $1,095.00
  14. API 512v

    Best Seller
    Discrete mic / line preamp with variable output
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $995.00

    $845.75
  15. API 550B

    MFR#: 550B Best Seller
    Discrete four-band EQ
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $1,295.00

    $1,100.75
  16. API 512C #204.2697 (Used)

    500 Series microphone preamp
    More Info
    Ready to ship!
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $695.00
  17. API 535-LA Line Amplifier

    MFR#: 535-LA
    Boost or attenuate line-level signals with API's signature warm, punchy sound
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $595.00

    $505.75
  18. API 527

    MFR#: 527 Best Seller
    Discrete 500 Series compressor with thrust circuit
    More Info
    In Stock
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty

    $1,095.00

    $930.75
  19. API 527 Compressor #0325-10 (Used)

    500 Series discrete compressor/limiter
    More Info
    Serviced to Order
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • This pre-owned item has been rigorously tested and serviced by our tech shop and comes with a free 1-year warranty.Free 1-Year Warranty
    • Prior to shipment, this item will undergo our multi-point inspection, servicing and quality control process by our industry-leading tech shop.Free VK Premium Servicing
    $695.00
    Wishlist Compare
  20. API 565 - Discrete Filter Set

    MFR#: 565
    500 Series Discrete Filter Set
    More Info
    Ships directly from the manufacturer
    • Free shipping to the lower 48 states for online orders.

      50% off shipping outside the US and to Hawaii and Alaska.
      Free Shipping (USA)
    • Our friendly and knowledgeable sales team is here to support you before, during and after your purchase.Free Tech Support
    • We add an additional year of coverage for additional peace of mind.Free Extended Warranty
    $505.75
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24 Items