S.E. "CLASSE A" inductive PSU NO feed Back AMPLIFIERS

BLU EYES MKII

ZERO FEED BACK EVEN LOCALLY

 

 

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since1-12-2003

 

 

 BLU EYES  MKII 30 - 50  Class A  - S.E. POWER AMP

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INDUCTIVE EXTERNAL POWER SUPPLY - Single Ended S.S. COMMON EMITTER CLASS A Dynamic Regulation OUTPUT STAGE completely NO Feed Back (even locally)  - 2 SOLE Transistor POWER AMP (NO MOSFET) with RD  BALANCED INPUT and OUTPUT TRANSFORMERS with decoupled output for SIMILAR BI-AMPING (see schematics hereafter)

 

2 inputs  Integrated Amplifier

Power amplifier

 

External PSU
 
 

A full class A Solid State Single Ended amplifier with a  70% OUTPUT STAGE efficiency. Only 3 transistors for 2 amp stages. Completely NO FEED BACK even the Emitter resistors on the output transistor are capacitor bypassed. (Please see hereafter schematic diagram). BIAS made only by RESISTORS. NO use of DIODES, neither current mirror or constant current sources. Extended Bandwidth (-2,5 dB @100 KHz) without the use of any local or total F.B.  2 "BLU EYES" LEDs used as frontal VU meters and a RED LED as PEAK METER.  Frontal potentiometer - slim line - MIRROR FINISHING Stainless Steel front panel. No internal microprocessor. At last the Solid State amp that sounds with a better  quality of a 300B D.H.T S.E. NO F.B. tube amp but  with more reliable output devices and much more power
 
 
models BE 30 - BE 50  Stereo power amplifiers

BE 33 - BE Integrated 2 inputs stereo amplifiers

R.M.S. Power

 MODELS 30 and 33  - 33 + 33 watts/ch both channels driven on any load with output transformers

MODELS 50 and 53 - 50 + 50 watts/ch both channels driven on any load with output transformers

Frequency Response

BE 30/33 models: 15Hz - 20.000Hz (-2,4 dB 15 Hz / - 0,1 dB 20 KHz)  @ 30 Watts

BE 50/53 models: 15Hz - 20.000Hz (-2,4 dB 15 Hz / - 0,1 dB 20 KHz)  @ 50 Watts

Harmonic Distortion

less than 0,2% at 1W - see measures also applyed to speaker load LAURA MKII

Sensitivity

600 mVrms model 33 & 53 - 1,4 Vrms models 30 & 50

Circuit

one  Royal Device interstage transformer - 2 POWER S.E. dynamic  CLASS A output devices.

S/N Ratio

> 105dB

Power Consumption at power on

less than 10 Watts
External  PSU Dimensions (W x D x H) 140 x 240 x 80 mm

Amplifier Dimensions (W x D x H)

390 x 242 x 83 mm

Weight

21 Kg Models

Chassis Finish

MIRROR SHINING Stainless Steel frontal panel - Stainless Steel cabinet

Remarks

HIGH END golden RCA Socket, GOLDEN Speaker Post, FULL Aluminum KNOB - COMPLETELY NO Feed Back even locally - DUAL MONO layout - external volume level control - Blue Eyes LED as VU meters and RED LED as peak meter. The 2 sole Power transistors operate in Single Ended AUTOMATIC FULL CLASS A depending on listening level for a high power save. 70% efficiency against less than 22% efficiency of a normal class A.