Category Archives: Amplifiers

Robson HA1

Robson HA1

Years of research into a dedicated headphone amplifier which can drive the most difficult of loads with ease has culminated into a design based around the most dynamic amplifier modules in their class. 

A dual mono design throughout using N-core technology and fully balanced with our own pre-amp internal buffer stage and a 4 pole Swiss Alps volume control. 

Internal wiring uses Duelund Coherent Audio copper and cotton in oil wire for input signal path and Harmonic Technology UP-OCC wire for output signal path. 

The HA1 headphone amplifier has been primarily designed to perfectly match the incredible HiFiMan Susvara and HE100se headphones along with matching headphone cables specifically deigned for each headphone and available as a package deal.

HA1 features

  • N-core technology, dual mono design
  • Specific high quality internal wiring
  • Fully balanced with switchable un-balanced
  • 4 pole balanced Alps volume control
  • Same form factor as the MV3, SA1 and MC1 amplifiers

Please enquire about Burr hardwood front panel options.

PRICE -  HA1 - £1800.00

PRICE - HA1 + HiFiMan Susvara + 3m cable - £5500.00

PRICE - HA1 + HiFiMan HE1000se + 3m cable - £3800.00 

Specification

Output power 4W RMS into 30 ohms ohms 

2.5W RMS into 60 ohms 

Class of operation Class D
Minimum load 4 ohms
Frequency response and Distortion  10Hz to 50kHz @  0.0015%
Signal to noise ratio 121dB
Output impedance 1.5 mohms
Peak output current 12 amperes
Damping factor >1000
CMRR 71dB
Power consumption 350W
Input voltage 240V/50Hz
Output connectors Silver plated 4 pin XLR or 6.3mm jack
Input connectors True Balanced  XLR or unbalanced RCA
Input impedance 47Kohms
Size 240W x 320D x 115H (mm)
Weight 5Kg

Robson HA1 - Image Gallery


Robson SA1

Robson SA1

Based around a dual mono design using the incredible Hypex N-core 250W modules and using the same high quality aluminium case as our matching MV3 pre-amp, MC1 phono-stage and HA1 headphone amplifier to give a stunning rack of high end Hi-Fi equipment.

Essentially the same sonic characteristics as our MB2 250W mono block design and using the same high quality components, input buffer stage and internal wiring.

High current and high damping factor to drive the most difficult of loads with ease and accuracy. Incredible imaging and soundstage capabilities along with immense detail retrieval.

SA1 features

  • Rhodium plated pole connectors
  • Duelund Coherent Audio internal wiring
  • Same form factor as matching MV3 pre-amp and MC1 phono stage
  • Highest damping factor in it's class 

Please enquire about Burr hardwood front panels

PRICE   £1200.00 

Specification

Output power -Dual Mono design  

250W x 2 RMS 4 ohms

130W x 2 RMS 8 ohms 

Continous output power 50W  x 2 RMS

Class of operation Class D
Minimum load 4 ohms
Frequency response and Distortion 10Hz to 50kHz @  0.0015%
Signal to noise ratio 121dB
Output impedance 1.5 mohms
Peak output current 17.5 amperes
Damping factor >1000
CMRR 71dB
Power consumption 350W
Input voltage 240V/50Hz
Output connectors Rhodium plated binding posts
Input connectors Un-Balanced RCA 
Input impedance 10Kohms
Size 240W x 320D x 115H (mm)
Weight 5Kg

Robson SA1 - Image Gallery


Robson MB2

Robson MB2

The MB2 Monoblock amplifier is based around the legendary Hypex NCore series of power amplifier module and housed in a high end diamond engraved aluminium case or with bespoke hardwood options. 

Capable of superbly holographic imaging and a vastly layered and wide soundstage. Vocals are vivid and real with a convincing portrayal of musical emotion.

Possibly the most accurate and detailed amplifier in the world with incredible dynamics and control and a perfect match for our range of tube pre-amplifiers.

MB2 features

  • Rhodium plated pole connectors
  • Duelund Coherent Audio internal wiring
  • Choice of balanced or un-balanced input
  • Choice of output power with the same sonic signature

High current and damping factor the MB2 will drive the most difficult of loads with breath taking control and power.

Please enquire about bespoke front panels.

PRICE - 500W -  £1600.00 /PAIR

PRICE - 250W -  £1300.00/PAIR

Specification

Output power 500W 4 ohms 270W 8 ohms NC500

250W 4 ohms 130W 8 ohms NC250

Class of operation Class D
Minimum load 4 ohms
Frequency response and Distortion 10Hz to 50kHz @ 0.0015%
Signal to noise ratio 124dB
Output impedance 2.6 mohms
Peak output current 27 amperes - NC500  17.5 amperes -NC250
Damping factor >1000
CMRR 71dB
Power consumption 650W / 350W
Input voltage 240V/50Hz
Output connectors Rhodium plated binding posts
Input connectors Un-Balanced RCA or true balanced XLR ( optional )
Input impedance 47Kohms
Size 212W x 272D x 78H (mm)
Weight 2.7Kg

Robson MB2 - Image Gallery


Robson MB10

Robson MB10

MB10 represents a reference grade power amplifier based around the Hypex N-Core 1200 series power amplifier.

Designed for Ultra high end audio reproduction and a perfect match for our MV2 tube Pre-amplifier in both impedance and sonic characteristics.

Sonic performance at it's highest level!

MB10 embodies up to 1200 Watts of Class D power with total control over all areas of the audio bandwidth to give an incredible sense of delicacy and uncompromising sound performance for the most demanding of listeners.

MB10 creates vividness and complex natural colours reenacting the original performance with the utmost precision to give the listener the ultimate aural experience.

MB10 Features

  • 1200 W Class D output into 2 Ohms
  • Highest damping factor in it's class for bass precision
  • Rhodium plated or gold WBT pole connectors
  • Duelund Coherent Audio internal wiring

Please enquire about solid Burr hardwood front panel options.

Price   £3600 / Pair

Specification

Output power 1200W 2 ohms, 700 4 Ohms,  400W 8 ohms
Class of operation Class D
Minimum load 2 ohms
Frequency response and Distortion 10Hz to 50kHz @ 0.001%
Signal to noise ratio 137dB
Output impedance 3 mohms
Peak output current 40 amperes
Damping factor >1000
CMRR 55dB
Power consumption 650W
Input voltage 240V/50Hz
Output connectors Rhodium plated or gold WBT binding posts
Input connectors Switchable Balanced  XLR or un-balanced RCA
Input impedance 5.3Kohms un-buffered true balanced/ un-balanced
Size 240W x 320D x 115H (mm)
Weight 5Kg

Robson MB1 - Image Gallery