LampizatOr Amplifier

GM70

Mono DHT SET

LampizatOr Amplifiers

The no-compromise monoblock power ampLIFIERS


All our know how, experience, passion and resources went into this creation. Not to mention all our reputation at stakes.

We are extremely proud of the amplifier - we managed to realize 100% of our plan and we managed to stay within our budget without making any compromise at all. Everything we though was important - is there.


Specification of GM70 version:

  1. • Single Ended triode mono block integrated amp (no need for a preamp)

  2. • dimensions WHD : 450 x 140 (250 with tubes) x 500 mm

  3. • weight: net 29 kg per each mono before packing (40 kg packed)

  4. • Gross shipping weight of a pair: 79 kg (180 lbs)

  5. • Power: 22 WPC single ended class A

  6. • Power consumption: 180 WPC on idle,

  7. • Power Tube: GM70 triode, graphite type

  8. • Driver: White-6N6P - NOS

  9. • Input tube ECC90S

  10. • Rectifier tube 5C3S - the coke bottle dual diode. (It supplies the small   tube section)

  11. • Input impedance: 90 K  Input Pot by Khozmo, 48 step ladder

  12. • Output impedance (speakers recommended) 4 &  8 Ohm

  13. • Output transformer: OGONOWSKI / Lampizator 

  14. • High Voltage transformer: Toroidy.pl

  15. • Biasing: manual (with exposed pot and meter)

  16. • Power transformers total capacity: 700 VA. 4 transformers in total per side

  17. • Anode supply: 900 V DC

  18. • Available front colors: black or silver (top always silver)

  19. • Input socket topology: one RCA SE (second input possible)

  20. • Biasing range: -60 to -140 V DC (covers both copper and graphite GM70s

  21. • Signal Caps:  Mundorf or Panasonic


Shipping inside EU cost 180 Euro by a 3 day land courier.

Intercontinental shipping via DHL air - 36 Hour delivery - 300 Euro.


Packing: flight case per each block

Hand made, custom order, high end equipment with vacuum tubes.

Interview about the amps :

LINK http://www.monoandstereo.com/2013/07/interview-with-lukasz-fikus-about.html

AMP Review link HERE

Description:

The amplifier is the muscle of the music system, if the DAC is the brain and heart.  During the years with Lampizator DAC we realized, that customers need an amplifier, and they are very concerned that a decent tube amp cost in 5 figures Euro.   I believe that this amplifier offers terrific value: surely it is not cheap, it is hardly pocket change but it is the lowest price for which a decent amplifier can be built from parts that were not stolen or found in the garbage, but actually purchased with an invoice. There are no miracles - if someone offers cheaper power amps of similar class - he is either selling them under cost to get rid of them or using children slave labor in far away camps. Or simply the technology has too many compromises like underpowered transformers with aluminum windings, underrated voltage specs, undersized caps. Such amps will last a year at best.

I offer good price because the amps share half of their parts with the lampizator DAC - the front panel, the caps, sockets, small tubes, all input and driver circuits and supplies. (the amps have part count of 330 ! )

The amplifier employs only the most radically “kosher” circuit features like:

  1. • Single ended triode operation from input to output

  2. • Pure Class A

  3. • Zero feedback, neither local nor global

  4. • Zero solid state parts in audio circuits

  5. • Unregulated and over specified supplies

  6. • Separate transformers for each task (four in total per side)

  7. • Short signal path - from RCA to pot - 2 inches of silver wire, same  from pot to first  tube, same from the first to the second tube and a hop across one capacitor to main tube without additional wiring.

  8. • Power tube bias current is monitored on analog needle meter

  9. • No need for triode matching as the bias is set manually.

  10. • There is a possibility to compensate aging drift on power tubes

  11. • Pre-heating operation mode for tube (and for electricity saving)

  12. • All tubes will be available forever in plentiful supply (only circa 100 USD per pair of  graphite GM70, 50 USD for all other tubes)

  13. • Pots can be bypassed completely

The amp is built around simple concept: to make it “as well made as sanely possible”. Without Gucci crazy stuff but otherwise - without compromise. 

The power tube is the best I know of (except the insanely unavailable original WE211)

The power supply has oversized transformer, one separate transformer for every task - one for GM70, one for small tubes and one for all heaters.

The small tubes have choke supply, and separate PSU for every half of the two triodes. The schematics is the best I know of. 

GM70 has its own huge choke as well. 

Signal "path" is super short - 6 inches in total. 

All parts are very good, over-specified, used well under their limits and so on. 

Bias is adjustable by user.

And whats most important - the output transformer and power transformer  are of first class  - the famous OGONOWSKI type,  but without the Ongaku silver windings.


The amp sounds VERY powerful, with strong bass, pure trebles, scary close mids, deep 3-d soundstage - all I wish for and more.

I hope there is nothing that can fail, even after 30 years of service.

 
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