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Every project begins somewhere. When Boulder’s engineers began work on the 508 Phono Preamplifier, they began with inspiration from the absolute pinnacle of vinyl playback: the 2008 Phono Preamplifier, easily the most celebrated phono stage of all time. But that’s where the similarities end. Where the 2008 was pure excess, the 508 is pure efficiency. As the smallest Boulder in more than two decades, the 508 packs an enormous amount of performance in a single, small chassis. A chassis that is carved from a single block of metal, no less. As with all Boulder products, proper XLR inputs and outputs are standard. As is the one constant from every Boulder.


    • Simple selection of MC or MM modes via switch on the rear panel

    • Elegant casework carved from a solid block of aluminum

    • Balanced inputs mean the perfect interface with the balanced output of phono cartridges

    • Integrated low-cut filter removes excessive low frequency information from warped or damaged records

    • Balanced outputs to minimize distortion and drive long cable runs with no loss of fidelity

    • Precision built and compact main PCB, produced on Boulder’s own surface-mount circuit board manufacturing machinery

      508 User Manual


      508 Product Dimensions

Additional information










Brand New (10/10)

Boulder’s manufacturing facility is located in Louisville, Colorado. At 23,000 square feet, the factory is more than twice the size of the previous building and enables manufacturing and assembly operations to be more productive and efficient.

The current Boulder factory features the latest energy conscious lighting and ventilation systems, automated access and locking systems, three dedicated listening spaces, and a new production and machining area to improve what is already the highest standard in the industry for design, fabrication, and assembly.

Tours are offered with advance notice and on a limited basis. For information about visiting the factory, please contact Boulder at (303)-449-8220, x110 or at sa[email protected].


Shipping Policy Following are the terms and conditions that constitute our Shipping Policy. Shipment processing time: All orders are processed within 2-3 business days. Orders are not shipped on weekends or holidays. If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone. If you require expedited shipping please contact [email protected]

Return Policy

Product Return Policy Items must be in like new condition and returned within 7 days from receiving shipment. Boulder may refuse a customer return when the returned item is not like new. Examples of conditions that will lead to refused returns may include when the returned item has: - Missing parts or the original product packing material. - Damage because it was improperly packaged for return shipment. - Damage from drops, spilled liquid, or mishandling. Return Shipping Policy Return shipping freight cost is the responsibility of the customer. We recommend shipping insurance to avoid potential loss.

Shipping costs

Within United States (US) Free

Shipping Details

Shipping from United States (US)