Category Archives: Pre-Amplifiers


MV4 - Line stage Phono Pre-amplifier

MV4 is a all in one phono stage and line Pre-amplifier using the MV3 and MC1 Phonostage.

Hand crafted using the same high quality components as the standard MV3 and MC1 models and using Duelled Coherant internal wiring and high end connections for RCA's.

For people who are passionate about vinyl, this model creates incredible soundstage and realism in your vinyl collection.

Comes as standard with 100 Ohm loading for MC cartridges.

For MM and different MC loadings, please specify upon ordering. 

MV4 features

  • Combined MV3 and MC1 amplifiers
  • High quality capacitor and resistors in signal path
  • Duelund Coherent internal wiring
  • All tube design throughout
  • Bespoke cartridge loading

Please enquire about Burr hardwood front panels

PRICE   £2200.00


Vacuum tube compliment 7 x JJ or Tung Sol 12AX7
Input Impedance Line in 47Kohm      MC in 100 Ohms 
Output Impedance 150 Ohms
Inputs Line in RCA and MC in Phono
Output Unbalanced RCA
Gain 22dB
Power Consumption 45 VA
Frequency Bandwidth 10Hz - 45KHz
THD 0.3% 1KHz 4V ref
S/N 88dB
Dimensions 380W x 320D x 130H
Weight 9Kg

MV4 - Image Gallery



Our latest Preamplifier is a full tube line stage design using 4 x 12AX7 specially selected tubes.

MV3 follows in the footsteps of the incredible MV2 using the same principles of minimum of active parts and high quality passive components in the signal path. A no compromise design and attention to components and internal wiring brings a product worthy of the Robson brand and a great match to our range of power amplifiers.

Volume is controlled via a Khuzmo 48 stepped attenuator  and series shunt resistor. No other manufacturer would use components such as this and many other parts as standard in a product in this price range.

MV3 features

  • Khuzmo 48 way stepped attenuator as volume control
  • Low ripple power supply on the anode
  • R-type transformer
  • Duelund Coherent internal wiring
  • SE model upgrade to high end signal capacitors

Great design and the use of very high quality components has created a pre-amplifier of exceptional abilities and able to drive the most difficult of power amplifier loads to below 10Kohms.


Standard model    £1600.00

SE model                £2000.00


Vacuum tube compliment 4 x JJ or Tung Sol 12AX7
Input impedance 47Kohm
Input Unbalanced
Output Unbalanced
S/N 88dB
Frequency Bandwidth 10Hz - 45KHz
Dimensions 240W x 320D x 117H 
Weight 7Kg

MV3 - Image Gallery



Our flagship reference Pre-amplifier to compliment our mono block power amplifiers and Phono stage Pre-amplifiers.

As standard hand made using very high quality components in the signal path, our MV2 valve pre-amplifier will compete with the very best products out there regardless of cost.
Again……listening is believing!!

Design specifications include dual mono power supplies with each channel supplied by it’s own high voltage and filament rails via a tube rectifier and feeding separate regulators to give incredible stereo separation.

A very simple but pure signal path based around the 6SN7 audio tube and using a single output capacitor which can be specifically chosen for it’s integration to solid state or valve amplifiers based on input impedance compatibility.

MV2 features :

  • Dual mono design
  • Tung-Sol vacuum tubes upgradable to Black Treasure or Pavane
  • Khuzmo 48 way stepped shunt attenuator
  • Duelund Coherent Audio internal wiring
  • Miflex paper/oil output capacitors

Purity of signal path is critical in the design of any amplifier to give incredibly black backgrounds and the retrieval and portrayal of the tiniest musical passages and notes.

If you have never heard a valve based pre-amplifier of this class you will be amazed at how much information you may be missing in your vinyl or digital music collection.


Standard Model   £2600.00

SE model  £3000.00



Vacuum tube compliment 4 x Tung-Sol 6SN7GTB

1 x 6X5 Rectifier tube

Input impedance 47Kohm
Output Impedance 150 ohms
Inputs 2 x RCA Line inputs
Output RCA Line out
Frequency response 10Hz - 50KHz
Power consumption 50VA
Gain 22dB
THD 0.3% 1Khz / 4Vef
S/N Ratio 88dB
Dimensions 380W x 320D x 130H ( without tubes )
Weight 11Kg

MV2 - Image Gallery