Bottlehead Crack + Speedball OTL Amplifier is available for $299. Select Bottlehead Crack for $199 and add the Speedball upgrade for $100. Regular price for Speedball is $125 (total $399).
https://bottlehead.com/?product=c…li
This is one of the best amplifiers available for high impedance headphones (>250 ohms). Perfect for those who bought the Sennheiser HD600 and HD650 in recent deals. This is a DIY kit and requires assembly and basic soldering for the Speedball.
Review: https://www.innerfidelity.com/content/marvelously-addictive-bottlehead-crack
https://bottlehead.com/?product=c…li
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