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RE: Headphone Amp Recommendations - DIY Ok.

Posted by connieflyer (A) on November 25, 2014 at 18:11:21

In Reply to: RE: Headphone Amp Recommendations - DIY Ok. posted by Steve Jones on November 25, 2014 at 10:21:40:

I have been using a Project Ember hybrid tube amp for my Sennheiser hd650's and loving it. They have them available in kit or pre built, I chose the pre built as Jeremy will choose the best parts available and it is tested to be sure everything is right. I found using a Bugle Boy 12ax7 suits me more than the Telefunkens.
Auto bias. Simply plug in a tube from a long list of 6 & 12V dual triodes and it will bias itself
Bias continuously adjusts itself so ageing of a tube is constantly corrected, within limits of course
Auto heater selection. Plug and play with a 6 or 12V tube and the heater voltage arrangement will be automatically set
Startup protection circuit with thermal shutdown
Advanced cooling design to keep temps nice and low
Three output resistance settings from 0.1, 35 and 120 Ohm
Input capacitor bypass possibility for more tuning options
Selectable gain
Pre-amp output so it can double as a volume controlled tube buffer
Very efficient, low power consumption, low temperatures
Awesome choice for headphones from 32-600 Ohm but can also drive 16 Ohm headphones
Lots of headroom and more than enough output power up to 2.4W, depending on headphone and settings
Comes with tube and power supply. Plug in your source to the RCA jacks, plug in your headphones and fire her up!


Specifications:

Solid state output stage
Non overall feedback - triode voltage gain stage
Power consumption: 5W continuous, 15W peak
Power supply: 48VDC (0.10A cont, 0.32A peak)
Input Resistance: 20k or 40k depending on gain setting
Input Sensitivity (6N23): 0.8V or 1.6V (dependent on gain setting and used tube)
Gain: 20- 26dB (selectable and dependent on tube)
Max Output voltage: 15.7Vrms at 300Ohm
Output Resistance: Selectable 0.1, 35 or 120Ohm
Frequency Response: 3Hz – 65 KHz (-0.5dB) with 32Ohm load
Frequency Response: 1.5Hz – 190 KHz (-3dB) with 32Ohm load
Signal to Noise ratio: 92dBA (dependent on tube)
Crosstalk: -89dB (dependent on tube)
THD: > 0.010% (dependent on tube)
Suitable for: 16-600ohm Headphones


Dimensions:

6.25L X 4.75W X 2.75H in inches

• http://garage1217.com/garage1217_diy_tube_headphone_amplifie   (Open in New Window)

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable

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