it's been a long while since CypherLabs came out with something, and then this came: The Prautes
Impedance (Ω) Switch: Headphone and speaker settings
300 Ω: High impedance headphones
100 Ω: Standard for many Studio headphones
32 Ω: Standard consumer headphones
8 Ω: Speakers or very low impedance headphones.
IEM: In-Ear-Headphones
Bass Boost Switch: Provides approximately +3dB boost with a variable roll-off point
The bass boost circuit gives a subtle increase in bass response. This control eliminates the high phase shift that occurs with typical tone controls. The boost amount is the same for all settings, but the frequency point of the boost ranges from 47Hz to 31Hz. This allows for very fine tuning of the bass response. Match this setting in coordination with the Impedance Switch to match the selected headphone, type of music chosen and your preferences.
Output Switch: Selects output type
SPK: Output to rear speaker jacks—use 8 Ω impedance
XLR: Output to balanced XLR jacks
Mute: No speaker output — use for independent line output mode
1/4″: Output to 1/4″ (6mm) Headphone jack
1/8″: Output to 1/8″ (3.5mm) Headphone jack
Line output is always active and volume controlled. We recommend connecting to any input impedance 100K ohms or greater.
Specifications
Available Colors: Black or Silver
Gain:
Line Stage: approximately 16dB
Headphone power: > 1 Watt, depending on load
Bass Boost:
31, 36, 41, or 47Hz boost of approximately 3dB (6dBm)
There are no extra active circuit elements are engaged!
Ground Lift Switch:
Use only if there is ground loop hum in your AC supply wiring.
Tube Complement:
Four 50L6 tubes are supplied for the output stage
Two 12AU7 tubes are supplied for the input/line stage
Annodized tube shields are provided to cover the tubes. The use of the tube shields is optional.
Frequency Response:
20Hz to 20KHz +.2dB to -.75dB into matched resistive load
Note: Can vary slightly based on tubes installed
Dimensions:
12 ½” D x 7 ¾” H x 9 ½” W / cm D x cm H x cm W
Weight:
16 pounds / 7.3 kilograms (not including AC power cable)
AC Power:
Depending on destination country the PRAUTES amplifier voltage setting is preset at the factory for 120v or 240v operation.
This post has been edited by noobandroid: May 8 2014, 10:44 PM
Cypher Labs AlgoRhythm Solo™, DAC out from Ipod, Iphone & Ipad