Metropolis NYC500

500W Tube mono power amplifier

SYNTHESIS is proud to introduce a Mono Power Tube Amplifier incorporating the exceptional the sonic performance.
The NYC500 provides a minimum of 500 watts RMS power output from 8 KT120's in Ultra-Linear (UL) - push/pull operation in 4 ohm and 8 ohm.
The NYC500 features a newly designed custom output transformer designed to achieve highly delicate and precise sound with extraordinary musicality from tubes, but with the authority of the best transistor amplifier.



  • DC Powered tube heater
    All tubes, except KT120, have DC stabilized heater circuits to reduce hum noise to a near in-audible minimum.
  • Output transformer
    The Output transformer uses a double C-core Hi-Grade Iron-Silicon for superb frequency reproduction and bandwidth. With this newly designed custom output transformer unique to the NYC500 we are able to achieving highly delicate and precise sound reproduction faithful to the original recording.
  • Mechanical chassis construction
    The power supply and output transformers are held by an extremely rigid “H” structure that keeps the unit free from unwanted vibrations which further helps reduce unwanted noise to the tubes.
  • Feet
    Four CNC machined aluminum feet with an insert of natural rubber. The depth and form of these rubber feet minimize the vibration of the amplifier in isolation from its surroundings.
  • Fan
    A 120mm fan provides a speed between 500 to 700 rpm which is controlled via micro. This ULN (Ultra-Low-Noise) unit is tailor made for the serious enthusiast who demands super-slow running speeds and the utmost silence of operation.
  • Bias control
    The factory set fine bias control is microprocessor controlled to maintain the optimum settings. If required this can be adjusted without the use of an external voltmeter by use of an internally fitted display device.
  • Dual mono Circuitry
    A completely dual mono design minimizes the crosstalk across channels. Power transformers use hi-grade iron silicon M0 and separate supplies with hi-grade selected capacitors to produce extremely low ripple levels. Independent to the mains transformer, each channel has a separate power supply guaranteeing a large reservoir of energy to meet the demands of the amplifier circuit and to maintain excellent interference immunity between channels.
  • Binding posts
    Two pairs each output (predispose for bi-wiring connection) of gold plated professional binding posts for a continued oxidization free connection further improve sound refinement.
  • Socket
    Gold plated ceramic sockets for a continued oxidization free connection further improve sound refinement.
  • Components
    Components for the NYC500 have been selected with great care throughout. Only the best available components are considered and all must undergo an exhaustive analysis of their sonic influence prior to final selection.
  • Selected tubes
    All tubes used are selected after 2 stage warm up. A fully computer monitored machine controls the process and at the end of this, selects the perfect tubes which are matched for a perfect balance.


Power stage (1 ch.)

8 X KT120

Input stage (1 ch.)

2 X 12AU7/ECC82

Driver stage (1 ch.)

2 X 12BH7

Input impedance


Input sensitivity

2,4V RMS unbalanced input (RCA)
4,8V RMS balanced input (XLR)

Output tap

4/8 Ohm bi-wiring connection


Push-Pull Ultra linear 20% tap

Power Output

500W RMS @ 4/8 Ohm (THD 1%)
550W RMS @ 4/8 Ohm (THD 3%)

Frequency response

20Hz to 20KHz ± 0dB
2Hz to 70KHz - 3dB


1% @ 1KHz (Max Power)

S/N ratio

>90dB “A” weighted


1 line unbalanced (RCA)
1 line balanced (XLR)


Pre out (variable level)

Bias setting

Manual adjustment by LED indicator
Independent for each power tube

Dimensions (w,d,h)




Line power

117, 230, 245 Vac 50/60 Hz (see rear label)


See rear label

Power consumption

1500W Max

Remote control


Anodized black aluminium

Transmission type





Volume, mute


2 x CR2032