PRE BLU EYES SPECIAL EDITION

no feed back tone control for a better tuning of digital recordings

 

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since 11-1-2007

 

BLU EYES  - SPECIAL EDITION -  STEREO PREAMPLIFIER  

LINE PREAMPLIFIER 1 - 7 - 14 dB using Royal Device interstage and output transformers - Passive/active tone controls  completely without feed back (even locally). No Voltage amplifiers.  JFET in S.E. Classe A ONLY for completely NO Feed Back PHONO STAGE

What a tone controls is need for:

1 - BASE: corrects lack of base on many speakers as ISO DINAMICS speakers

2 - MID RANGE: by reducing 2 or 3 dBs on the MID range (2 to 3 KHz), it is possible to reduce annoying material on woman voice when digital recording has been toughly and badly used.

3 - HIGH RANGE: it is possible to compensate the roll off due to cables connections, without spending several thoudsands of EUROs or US$ for. Never thought about?

The problem of tone controls is FEED BACK that destroy sound quality.. No one uses tone controls WITHOUT FEED BACK.

Here we are instead. See schematic diagrams here after.

semplicity is art that produces real sound

PRE BLU EYES - SPECIAL EDITION

 

 

 

 
Blu Eyes SPECIAL EDITION

2  LINE INPUTS + BLU EYES PHONO STAGE   - RD Output transformers (600Ώ - 3,2 Veff) - completely no F.B. Tone Controls thru RD interstage  transformers and polipropilene capacitors - NO Voltage amplifying stage- MOTORIZED POTS with remote control and knobs with internal BLU LEDS for reference positioning in dark environment
 

Phono Input

MM/MC  (1 mVeff)

Phono Input impedance

47 Kohm
LINE Input impedance 10 Kohm

frequency response

25Hz - 20,000Hz  +/- 0,3 dB (phono);  PASSIVE SUBSONIC FILTER - 2,5 dB @ 20 Hz (*)

10 Hz - 50 KHz (LINE) - gain 7 or 14 dBs

10 - 130 KHz (LINE) - gain 1 dB

THD

less than 0.2% (MM or MC hi level input) - less than 0,05 % LINE input
Tone Controls +6 / - 9 dB @30 Hz ; MID -5  / + 5 dB @ 2200 Hz ; +7 /-7 @ 20.000 Hz. Thru interstage RD transformers - NO VOLTAGE amplifying stages

Output impedance

1800 ohm or 600 ohms
Max Output 6 Vrms on 1800 ohm load (default). 3,2 Vrms on 600 ohm load.

Amplification

Gain setting 1 -7  (on 600 ohm ) - 14 dB (on 1800 ohms) - internal pre-setting

S/N ratio

100 dB  (LINE INPUT)

Power Consumption

5 W

Dimensions (W x D x H)

390 x 245 x 83mm

Weight

5 Kg

Finishing

Bright MIRROR shine STAINLESS STEEL FRONTAL finishing . SATIN STAILESS STEEL CHASSIS

NOTES

3 inputs – Phono- CDP and AUX

PHONO STAGE: PASSIVE RIAA with CUSTOM made metalized polipropilene capacitors 2% -  Internal power supplies completely separated for each channel and each stage - External p.s.u. transformer. Full Aluminum KNOBS hand polishing and finishing with internal BLU LED for position display

TONE CONTROLS: metalized polipropilene capacitors, motorized potentiometers with remote control. Tone controls IN / OUT from remote control

VOLUME: motorized potentiometer with remote control

All Knobs, with internal BLU LED

 
 

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