Shop by Price


Online orders & demonstration rooms are operating as normal. Read more here »

Icon Audio MB150 Mono Blocks (Pair)
Zoom  Zoom

Icon Audio MB150 Mono Blocks (Pair)


£2,999.96 Exc. VAT |  





Icon Audio MB150 Mono Blocks (Pair) 


The power output stage uses the super GEC KT90/120 design probably the greatest all round hi fi valve, operating in both “Ultralinear”(150w) and Triode mode (100w) to give the maximum choice of operating conditions. Effectively giving you two amplifiers in one! 150 watts of valve power is easily comparable with 300 watts of transistor power and will drive almost any sensitivity of speakers well, leaving plenty of headroom for dynamics and low distortion. The large custom wound transformers are able to deliver very deep bass notes and smooth clean treble.

Close attention has been paid to the large power supply using eight large capacitors and a large “choke” in a traditional “Pi” configuration. This gives very low source impedance with a huge reserve of power available for large transients without clipping.

This combination gives a very smooth and detailed sound stage which works well to bring out the colour and texture of older recordings and whilst not overemphasizing the harshness of many modern digital recordings. This makes for a very easy to live with amplifier that has the power to control modern speakers.

Surprisingly from such big amplifiers is how well they perform at low powers. Their agility and detailed texture of strings and vocals is quite astounding.

A feature of the MB150s is the high and low sensitivity. This enables MB150s to work with both “Passive” and conventional pre amplifiers. This is not done by the usual attenuation which increases noise and reduces quality, but genuinely changes the sensitivity (or gain) of the input.

Another feature of the MB150s is the power saving “Warm up/Standby” switch. This prevents valve cathode stripping during start-up and enables the amplifier to remain in standby on low power without wasting valuable valve life or electricity (only 50w). The amplifiers will then start instantly, fully warmed up.

The brand new design features painted heavy gauge steel chassis, 9.5 mm solid alloy front panel. And Icon Audios famous Plexiglas valve cover creates a stunning visual impression. On the scales at 44Kg (pair) this amplifier is no lightweight in quality or performance and should give many years of excellent service.


Specifications and Features

•  Comprehensive manual supplied
•  Full instructions for valve change included
•  All hand wired point to point
•  No printed circuit board to ‘colour’ sound
•  Class A, all Triode front end
•  Output circuit Ultralinear or Triode switchable*
•  8x KT90/KT120′s precisely matched for best performance
•  4x 6SN7 phase inverter valves
•  Standby switch to prevent cathode stripping on startup
•  Standby switch to save valve life and power.
•  Optional automatic HT delay to prevent cathode stripping
•  150w RMS continuous per channel
•  100 Watts RMS in Triode mode
•  Signal to noise level -100db
•  Freq response better than 20hz-20kHz +0 – 0.5db
•  Total harmonic distortion typically less than 0.1% 1khz
•  4 & 8 ohm loudspeaker taps
•  Japanese steel EI transformers with low oxygen copper
•  Attractive valve cover included in the price
•  High quality 2W metal film, & wire-wound resistors
•  Blue LED mains indicator
•  Polypropylene audio capacitors
•  Silver PTFE audio cable
•  Custom hand wound output transformers
•  Big custom wound PSU Choke
•  Ceramic valve holders for minimum leakage
•  Centre tapped heater circuit for minimum hum
•  ‘Soft start’ device incorporated
•  Gold plated Input & speaker terminals
•  400mv (high) & 1200mv (low) input sensitivity.
•  230/240volts approx (115v available)
•  Consumption: 60w standby, 130w quiescent, 300w Max
•  CE, ROHS, WEEE compliant where applicable
•  Size in mm W200, D523 (560 overall), H195 (218 inc cover), 22kg ea. (For shipping cm: 36x32x66 (2) 25x31x42 52kg)




Be the first to Write a Review for this item!

01733 350 878
GBP EURO USD YEN   TOTAL: £0.00    View Basket 
Analogue Seduction