top of page



Bob Carver Corporation Products


Bob Carver Corporation takes pride in every piece of gear we ship. However, if there is a mistake, please call us immediately, and we will make it right. If a product does not seem to be functioning correctly, please call us and we will do our best to help walk you through the problem.

If you are located in the USA and need to have your unit repaired, you will get the fastest response by calling us at 815-985-3557.  We will provide you with return instructions and shipping information. This will enable us to correctly identify your unit and ensure timely repair and return. Please ship only the unit that needs repair, and pack it in the original box and packing material if possible. You are responsible for shipping your unit to our facility and for insuring the shipment.


Please make sure to write your contact information on a note inside the package.

We will return the unit back to you prepaid, if in warranty. If not, you'll be billed for freight.

Please note that you may void your Limited Warranty if you, or someone other than Bob Carver Corporation, attempt to repair your Bob Carver Corporation product.

Service and support form for owners of

Bob Carver Corporation products

  • No sound — but the amp is on, plugged in, and the tubes are glowing."
    1. Rotate the Crimson/Raven/Silver Seven volume control counter-clockwise to fully turn down the volume. 2. Make sure that your output source (preamplifier, DAC. etc.) is operating correctly and playing. This may require plugging in headphones, ear buds or routing the input device's output to a different amplifier/speaker combination (still have that '90's boom box?). 3. Check the connections between your output device and your amplifier(s). Even pricey connection cables can fail. 4. Check the connections between your amplifier(s) and your loudspeakers. 5. Carefully rotate the Crimson/Raven/Silver Seven volume control clockwise. 6. Call us! This shouldn't happen and we're eager to get you back up and running.
  • My amp has no sound and my connections are correct.
    The owners' manuals deal with this. All Bob Carver Corp amplifiers can repair defective tubes if the failure is due to an impurity within the glass bottle--by far, the most common cause of failure. There are two fuses on the back panel. Your "tube" fuse blew to protect the tube and supporting circuitry. No other brand can do this. Replace the fuse and the tube is now "healed" and you may resume your enjoyment with no degradation in perfomance at all!
  • Is the warranty transferable?
    No, our warranties apply to the original purchaser only.
  • Why don't you list damping factor on your spec page?
    We do not list damping factor becase, simply put, much of the general population of audio enthusiasts do not understand the lack of importance. The great majority of world-class tube amps, all have an output impedence between one and two ohms. Ours is between 1.5 and 1.8 resuling in a damping factor below 15 for all of these, depending on the brand. We suggest this improves the listening experience. It's important that you realize that the very circuit designs optimizing certain specifications may actully degrade the sound while posting better (meaningless) numbers. Listen to the product and you'll see. In the casse of the Crimson 275, compare it to any amplifier up to around $10,000 and you'll be convinced!
  • Where is your product manufactured?
    All Bob Carver Corporation products are designed by Bob Carver and built and tested in Illinois and California from domestic and imported parts.
  • Just what is the best bias setting; I've gotten different answers.
    Bob Carver prefers 80ma which would provide a slightiy larger soundstage and a bit more depth (he's really intro that aspect). We ship at 100ma for a bit more detail and a lttle less of the spacial aspects metioned above. If you change output tubes, check the bias. Note that once adjusted, the bias stays stable and may never need an adustment until the tubes age a bit. You'll not damge the amp no matter the setting.
  • My bias meter jumps around when playing music. Does this mean the bias is constantly changing?
    When playing music, the meter is responding (quite slowly in comparison) to the DC Restorer (a type of tracking bias supply) preventing DC voltage sag in response to the reactive, dynamic conditions of reproducing music and driving complex variable loudspeaker loads. The DC Restorer is one of the reasons our products drive loudspeakers so well, enabling Bob to create designs that save weight, reduce cost, and improve performance.
  • Can I buy directly from the factory and get a better price?
    Yes you can. We have updated our business model to internet direct for the greatest customer value. Our Carver Amplifier Challenge, money back guaranty, lets you compare our products to others multiple times our price, in your home making music through your loudspeakers. See The Carver Store above. Challenge our products. The customer always wins!
  • Can you fix my old Carver stuff? Bob seems to move from company to company.
    Legacy Carver product is repaired by select services that you can find via Google. New Carver product found in this web site are faithfully supported by us at Bob Carver Corporation. BEWARE of imitations and false promises. Counterfeit and unlicensed Carver products still pop up on the web. Bob Carver has established only four real audio companies -- Phase Linear, Carver, Sunfire and now, the Bob Carver Company. In the case of the former three, the corporate "suits" and Bob regularly disagreed on the direction of the brand and he left each reluctantly. The final iteration of the Bob Carver Company is more consistent with his vision -- ultra-high-performance tube electronics at merely high-performance pricing with innovations on every model and no going down-market, no TVs, no car audio, no portable blue-tooth speakers and no entry-lever mundane products, yet all with longer warranties, longer lifespan and better customer service than any brand in our industry's history.
  • In the forums and YouTube Bob Carver videos, there's talk of the ear-brain interface. What's that about and don't all companies do this?"
    If they do, they are unknown to us and likely to be accidental. Dr. Carver has a background in physiology, as well as electronic design and engineering and his doctorate is in physics. He developed monoclonal antibodies to fight cancer and infections and established a facility to manufacture the antibodies as well. Every product we make takes the ear-brain interface into consideration. For example, without providing proprietary details, Bob's research is consistent with that of Frank McIntosh, Stu Hegeman, the BBC, the Crown Corporation and Seigfried Linkwitz despite minor differences in application, but Bob has made more products following those precepts than all other companies combined. The goal is the reduction of listener fatigue, imprecise imaging and a small tight soundstage lacking envelopment, depth and openness. All our amplifiers use this technology as did the loudspeakers he's manufactured in the past. For more details, contact Call us at
  • Who owns Bob Carver Company today?
    Bob Carver and his family own Bob Carver today. Bob started this company in Feb 2021 after a company that had been building Bob designs under license, closed during the COVID pandemic late in 2021. Not wanting to see his legacy end on a sour note, Bob started up again with some special designs he had made several years earlier and was anxious to build. Bob is back.
  • Is Bob Carver still involved in the operations of the company?
    Yes he is. Bob Carver is owner and chief design engineer. Bob's signature is required from concept sketches to CAD models, from prototype to production. Jim Clark is Director of Operations and works directly with Bob and manufacturing.

Thanks for submitting! We'll get back to you!

Bob Carver Corporation


For Legacy Products,
See Below

Due to the nature of our proprietary circuit design,
the Bob Carver Corporation 
authorizes NO outside service facilities.

For our Authorized Legacy Brands, we have two service facilities – one each, East and West of the Mississippi River. Click on the link below.

Other facilities claiming to be authorized may not be.
Check first!


Frequently Asked Questions

bottom of page