Love it! You must be very happy with how it turned out. I'm sure the new owner will be as well! It looks so clean and very professional.
One place up the ladder for those of us on the waitlist
That appears to be an intriguing design, just about the sort of amp I have been interested in finding for my Auteur! I look forward to learning more about it. I have been on the waiting list for a Glenn, but that might require a lengthy wait still from what I am hearing. My other considerations at this point have been the ZMF Pendant and the DNA Starlett. Looks like a Blue Halo should be in the running now! Great name BTWNEW PRODUCT: BLUE HALO (Amplifier)
BLUE HALO is a dedicated amp for high impedance headphones such as the Sennheiser HD600/650/800, ZMF Verite/Verite C, Beyerdynamic, etc. (anything with 200+ ohm impedance). It's a design that eliminates the need for 6AS7/6080/5998 power tubes for output power. It has two 6J5 sockets and a 6SN7 socket. You can plug in a pair or 6J5, a single 6SN7, or both at the same time. With the use of adapters (purchased separately), hundreds (even thousands) of other types of tubes can be used within the sockets as well (including C3G, 12AU7, 12BH7, and many many others). A 12V switch is also included at the back of the unit in order to use 12V tubes. It produces ~1 watt into 300ohms, more than enough for all high impedance headphones.
BLUE HALO is designed to have a clean, neutral, detailed and smooth sound with great bass. Tube rolling alters the tone of the amp at your preference (e.g. warmer tubes, more detailed tubes, more mids, etc.). The tubes get "supercharged" so that they can produce as much power as 6AS7/6080 power tubes, while fully determining the tone. Not having the 6AS7/6080 tubes means one less gain stage between the input and output = More clarity. The high voltage power supply uses only high quality wax/oil filled polypropylene film caps. Output capacitor are also high quality wax/oil filled polypropylene film capacitors. This means there are zero electrolytics within the signal path - something that no other OTL tube amp has!
BLUE HALO does not use tube rectification, it uses my own custom designed circuit using critically damped and resistivily bounded HEXFRED rectification followed by a high voltage Maida style super regulator and utilizing a wax/oil polypropylene capacitor. This is a much better alternative to tube rectification as it leads to better overall tonal quality, better bass and cleaner overall tone. This also gives deeper blacks and bigger soundstage than tube rectification. It also uses regulated DC on the heaters for a silent black background and zero hum.
BLUE HALO has a base build that includes Neutrik RCA & XLR inputs, Neutrik TRS and 4pin XLR outputs, CNC Engraving, QQQ sockets, Alps Blue velvet pot, and high quality copper internal wiring.
Potential upgrade options include: Lundahl power transformer, Stepped Attenuator (e.g. Acoustic Dimension, Goldpoint, Khozmo, etc.), Kiwame power resistor upgrade, Vishay/Dale RN55/RN60 signal resistor upgrade, Supercharger capacitor upgrades, vibration isolation feet, tube socket upgrades, and RCA/XLR connector upgrades. VU Meters are also possible.
More Photos of BLUE HALO here: https://photos.app.goo.gl/yhVnwuC9Tp25vXdD8
If interested in a custom build, please contact for more details, pricing and build time.
That appears to be an intriguing design, just about the sort of amp I have been interested in finding for my Auteur! I look forward to learning more about it. I have been on the waiting list for a Glenn, but that might require a lengthy wait still from what I am hearing. My other considerations at this point have been the ZMF Pendant and the DNA Starlett. Looks like a Blue Halo should be in the running now! Great name BTW
That appears to be an intriguing design, just about the sort of amp I have been interested in finding for my Auteur! I look forward to learning more about it. I have been on the waiting list for a Glenn, but that might require a lengthy wait still from what I am hearing. My other considerations at this point have been the ZMF Pendant and the DNA Starlett. Looks like a Blue Halo should be in the running now! Great name BTW
Cool! I'll be excited to read your experience with it.
Congrats Mischa & to the new soon-to-be-even-happier ownerNEW PRODUCT: BLUE HALO (Amplifier)
BLUE HALO is a dedicated amp for high impedance headphones such as the Sennheiser HD600/650/800, ZMF Verite/Verite C, Beyerdynamic, etc. (anything with 200+ ohm impedance). It's a design that eliminates the need for 6AS7/6080/5998 power tubes for output power. It has two 6J5 sockets and a 6SN7 socket. You can plug in a pair or 6J5, a single 6SN7, or both at the same time. With the use of adapters (purchased separately), hundreds (even thousands) of other types of tubes can be used within the sockets as well (including C3G, 12AU7, 12BH7, and many many others). A 12V switch is also included at the back of the unit in order to use 12V tubes. It produces ~1 watt into 300ohms, more than enough for all high impedance headphones.
BLUE HALO is designed to have a clean, neutral, detailed and smooth sound with great bass. Tube rolling alters the tone of the amp at your preference (e.g. warmer tubes, more detailed tubes, more mids, etc.). The tubes get "supercharged" so that they can produce as much power as 6AS7/6080 power tubes, while fully determining the tone. Not having the 6AS7/6080 tubes means one less gain stage between the input and output = More clarity. The high voltage power supply uses only high quality wax/oil filled polypropylene film caps. Output capacitor are also high quality wax/oil filled polypropylene film capacitors. This means there are zero electrolytics within the signal path - something that no other OTL tube amp has!
BLUE HALO does not use tube rectification, it uses my own custom designed circuit using critically damped and resistivily bounded HEXFRED rectification followed by a high voltage Maida style super regulator and utilizing a wax/oil polypropylene capacitor. This is a much better alternative to tube rectification as it leads to better overall tonal quality, better bass and cleaner overall tone. This also gives deeper blacks and bigger soundstage than tube rectification. It also uses regulated DC on the heaters for a silent black background and zero hum.
BLUE HALO has a base build that includes Neutrik RCA & XLR inputs, Neutrik TRS and 4pin XLR outputs, CNC Engraving, QQQ sockets, Alps Blue velvet pot, and high quality copper internal wiring.
Potential upgrade options include: Lundahl power transformer, Stepped Attenuator (e.g. Acoustic Dimension, Goldpoint, Khozmo, etc.), Kiwame power resistor upgrade, Vishay/Dale RN55/RN60 signal resistor upgrade, Supercharger capacitor upgrades, vibration isolation feet, tube socket upgrades, and RCA/XLR connector upgrades. VU Meters are also possible.
More Photos of BLUE HALO here: https://photos.app.goo.gl/yhVnwuC9Tp25vXdD8
If interested in a custom build, please contact for more details, pricing and build time.
That's correct, OTL. Output impedance is in the realm of 20-30 ohm. Zero negative feedback design, pure class A. Supercharged driver tubes that determine all of the harmonics and tone of the output. The driver tube is the only gain stage and to top it off the signal passes through very few components. PSRR across the audioband of greater than -170dB gives a dead quiet background when using good tubes (non-noisy tubes).If I had a crystal ball I would also guess that a version of this with OPTs to better suit low-Z headphones will land sooner or later too.
. Any suggestions, or better sharing links is favorable thanks..
