Speedball 1.1 Upgrade for Crack Amplifier


What yields an even more intense experience than Crack? The most hardcore users say it’s a Speedball. Speedball is our Camille Cascode Constant Current Source upgrade for the Crack headphone amplifier. The 22.1KΩ plate loads of the 12AU7 input triodes are replaced by C4S loads, as are the 3KΩ cathode load resistors of the 6080 triodes. The PC board for the loads on the 6080 tube has very ample heat sinks to assure high reliability. The same Speedball 1.1 kit is an upgrade for Crack 1.1 and the original Crack.

If you are buying this upgrade at the same time as your Crack 1.1, please select it from “Upgrade Options” menu on the Crack 1.1 page. Do not order it from this page.

9 in stock (can be backordered)

SKU: SPEED Category:


DISCOUNTS: When you buy 1 > Regular Price: $125.00USD  •   When you buy 2 or more > Sale Price: $112.50USD  •  Save: $12.50USD (10%)!

Your pre-order will be charged the day the kit is ordered. We do this to allow cash in advance payment to our vendors to keep the price you pay as low as possible. DIY audio is a very focused esoteric market. We are a small staff with a large passion, attempting to offer the broadest range of kits possible to those interested in this exclusive pursuit of ultra high quality audio reproduction, Thus each kit is manufactured and packed to order, and the production and packaging schedule is influenced by demand. Please understand that our shipment can take up to 3 to 6 weeks when demand is high. You may check how shipping is progressing for a kit by looking here.

Additional information

Weight 0.75 lbs
Dimensions 6 x 6 x 3 in


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Top of the line Mainline headphone amp kit on sale thru June 23rd. We have moved! Check the Contact page. Dismiss