Home | High-End Audio Reviews | Audiophile Shows | Partner Mags | Daily News | Search     

  High-End Audiophile Review Magazine & Audio Equipment Reviews

  High-End Audiophile Equipment Reviews
  Gear Reviews, News, Show Reports, And More!

  Celebrating 26 Years Of Service To Music Lovers




























Enjoy the Music.com High-End Audio Contests

Enjoy the Music.com's February 2020 Contest


Win Bottlehead Crack 1.1 OTL Headphone Amplifier Kit Win an OTL vacuum tube headamp valued at 315!


Win Bottlehead Crack 1.1 OTL Headphone Amplifier Kit
Win an OTL vacuum tube headamp valued at $315!


Win Bottlehead Crack 1.1 OTL Headphone Amplifier Kit Win an OTL vacuum tube headamp valued at 315!


  Bottlehead and Enjoy the Music.com are giving away their easy-to-build Crack 1.1 OTL vacuum tube headphone amplifier kit ($315 on up depending on options). For decades, Bottlehead has been providing wonderful DIY kits, usually based around vacuum tubes (hence company's name Bottlehead), and with kit naming being a bit, ummm, edgy. From Wikipedia: "Crack affects the brain chemistry of the user causing euphoria, supreme confidence, alertness, increased energy – and a craving for more crack."

That was pretty much Doc Bottlehead's (Dan Schmalle) experience when they built and listened to this new bang for the buck headphone amplifier. Their initial goal was to come up with another easy to build, great sounding design that would harken back to Bottlehead's early days. Crack is the company's version of classic OTL (Output TransformerLess) designs. OTL is a type of vacuum tube audio power amplifier that removes the use of an output transformer for the purpose of greater linearity and fidelity. OTLs use one of two primary methods for output stage coupling: direct coupling (DC) or capacitive coupling (AC).


Win Bottlehead Crack 1.1 OTL Headphone Amplifier


With that said, Bottlehead's Crack 1.1 harkens back to one of their headphone amplifier designs from several years ago that were hailed as some of the best sounding of their day. Comparison of their prototype with the $10,000 Bottlehead Reference headphone amplifier was a bit disturbing. It showed them why the OTL head-amps from a few years back were so highly praised. The new kit wasn't quite as good (whew!), yet it was much closer than they expected it to be.


Win Bottlehead Crack 1.1 OTL Headphone Amplifier


Their Crack 1.1 is what Bottlehead calls a Skill Level 1 kit, perfect for first time builders. The circuit is so simple you can build it in an evening or two. A simple circuit also means a low parts count, which keeps the price low, too. Crack is an output transformerless amp designed specifically for running higher impedance (200 Ohms or higher) headphones like the many Sennheiser, AKG, and beyerdynamic designs.


Win Bottlehead Crack 1.1 OTL Headphone Amplifier


It comes with a universal power transformer and can be used worldwide by following the wiring instructions within the owner's manual. Please note that international customers will need to provide their own non-USA power cord.


Upgrade from the standard black molded IEC power cord to the Bottlehead Power Cord Kit (for 120VAC mains only) and save $5 over the regular price ($79)

A Bottlehead Badge is not included with this kit, but you can add one for their cost ($8)


Win Bottlehead Crack 1.1 OTL Headphone Amplifier

Want To Upgrade?
Bottlehead's Speedball 1.1 for Crack is only $115 and is said to yield an even more intense experience than Crack. The most hardcore users say it's a Speedball. Speedball is the company's Camille Cascode Constant Current Source upgrade for the Crack headphone amplifier. The 22.1 kOhm plate loads of the 12AU7 input triodes are replaced by C4S loads, as are the 3 kOhm 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.



One winner will receive Bottlehead's Crack 1.1 OTL headphone amplifier kit valued at 315!


Want to learn more? Visit their website at Bottlehead.com


How To Enter For Your Chance To Win
You can enter our contest by clicking here and joining our mailing list.

We also ask you to like us on Facebook and Instagram too.


One entry per person please. Contest entry time ends February 29th, 2020.


NOTE: If you are currently a member of our mailing list then you are already entered for your chance to win. Remember to join us on Facebook and Instagram too.


Click here for contest rules.




Remember to visit Enjoy the Music.com at   















































Quick Links

Audiophile Review Magazine
High-End Audio Equipment Reviews


Equipment Review Archives
Turntables, Cartridges, Etc
Digital Source
Do It Yourself (DIY)
Cables, Wires, Etc
Loudspeakers/ Monitors
Headphones, IEMs, Tweaks, Etc
Ultra High-End Audio Reviews


Enjoy the Music.TV


Editorials By Tom Lyle
Viewpoint By Roger Skoff
Viewpoint By Steven R. Rochlin
Various Think Pieces
Manufacturer Articles

Show Reports
Pacific Audio Fest 2022 Report
T.H.E. Show 2022 Report
HIGH END Munich 2022
AXPONA 2022 Show Report
CanJam Singapore 2022 Report
Salon Audio Montréal Audiofest 2022
Florida Audio Expo 2022
AudioCon Los Angeles 2022
Capital Audiofest 2021 Show
The HiFi Summit Q2 2021
T.H.E. Show 2021 Report
The HiFi Summit Q4 2020
The HiFi Summit Q2 2020
Bristol Hi-Fi Show Report 2020
Click here for previous shows.


Audiophile Contests
Cool Free Stuff For You
Tweaks For Your System
Vinyl Logos For LP Lovers
Lust Pages Visual Beauty


Resources & Information
Music Definitions
Hi-Fi Definitions


Daily Industry News

High-End Audio News & Information


Partner Print Magazines
Australian Hi-Fi Magazine
hi-fi+ Magazine
HiFi Media
Hi-Fi World
Sound Practices
The Absolute Sound
VALVE Magazine


For The Press & Industry
About Us
Press Releases
Official Site Graphics


Contests & Our Mailing List

Our free newsletter for monthly updates & enter our contests!




Home   |   Industry News   |   Equipment Reviews   |   Press Releases   |   About Us   |   Contact Us


All contents copyright©  1995 - 2022  HighEndAudio.com and Enjoy the Music.com®
May not be copied or reproduced without permission.  All rights reserved.