Optimise & Preserve Your Tonal Purity

Quickly & easily buffer any FX-Loop

We tried to recreate the design of the vacuum tube buffered effect loop installed on the amplifier, but at that time, the same size transformer was not found. This is the neck and the project of the amplifier itself is pushed to the stop.
After that, we found it was possible to create a solid state effect loop that works as well. That's the beginning of the Klein-ulator.

We have redesigned various ideas and repeatedly tested. Compare to the same vacuum tube effect loop buffer as the real "D" amplifier, we have improved the design.

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The Rig Doctor Inc.

The Klein-ulator Buffered FX Loop

The Klein-ulator Buffered FX Loop

Regular price $199.99 USD
Regular price $249.99 USD Sale price $199.99 USD
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We Guarantee You'll Love Using Klein Ulator Buffer On Your Pedalboard

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Satisfied within 30-days or refunded


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Features & Specs

The Ceriatone Custom-built Kleinulator Mini is the solid-state version of the famed Dumbleator effects loop buffer. The original Dumbleators are more rare than a Dumble amp, so Ceriatone has filled the void the same thing, for hundreds (thousands?) less.

  • 9V Wall Wart Power Supply NOT Included
  • Dimensions: 4.75" x 3.75" x 1.37"
  • Weight: 1.1 lb. / 0.5 kg

Frequently Asked Question

Returns, Exchanges & Refunds

We have a 14-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

To start a return, you can contact us at info@therigdr.com. If your return is accepted, we’ll send you instructions on how and where to send your package. Items sent back to us without first requesting a return will not be taken. 

You can always contact us for any return questions at info@therigdr.com.

Damages and issues

Please inspect your order upon receipt and contact us immediately if the item is defective, damaged or if you received the wrong item so we can evaluate the issue and make it right.

Exceptions / non-returnable items

Items that have been used or damaged by the customer cannot be returned upon receiving the item. The Rig Doctor Inc. holds the authority to refuse a refund should the things fall under the above circumstances.

Unfortunately, we cannot accept returns on sale items or gift cards.


The fastest way to ensure you get what you want is to return your item. Once the return is accepted, purchase the new item separately.


We will notify you once we’ve received and inspected your return and will let you know if the refund was approved or not. If approved, you’ll be automatically refunded to your original payment method. Please remember it can take time for your bank or credit card company to process and post the refund.

Do You Offer Free Shipping?

All orders shipping within the USA qualify for free shipping on any purchase over $99.

Free shipping is not offered outside of USA orders.

When Will I Receive My Order?

As many of the items sold on our site are made to order, it is essential to note that any cables, custom pedalboards, buffers or other handmade items may take up to 7 business days to arrive at your door.

We do our best to ensure that our orders arrive well ahead of the above timeline. However, we want to assure you that each product is handmade and tested by our curated team of experts to ensure you receive a superior quality product.

Where are you located?

The Rig Doctor's head office is located in Toronto, Canada. Our distributions centers are located across the USA.

Please note that most items ship from the USA.

Do you Offer Product Customizations?

Yes, most of the products on our site can be customized based on your specific needs! If you do not see an option that fits your needs, please email us directly at: info@therigdr.com.

One of our experts will be in touch with you and quote your custom project within 24 hours.

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Since 2009, has been building guitar rigs for world-class touring and studio guitarists

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