Preamplifier No.2310 Introduction

Preamplifier No.2310 Introduction

Preamplifier No.2310 is a fully balanced directly heated triode designed in collaboration with Don Sachs and Lynn Olson (under license). 

We recently demonstrated the circuit’s sound quality capabilities at this years Toronto Audiofest where it won the blue note award for Best At Show by Enjoy The Music publication. 

“Every show seems to have a room that comes out of nowhere and is jaw-droppingly good.”



This blog post covers some of the technical details on the new preamp. 

We are now taking order deposits on the new preamp on our site’s product page. 

Ordering

  • Made-to-order 
  • 90 Day construction lead time 
  • $9,400.00 USD plus shipping 

Customization

A unique offering in the industry is the option to customize the front panel design which is CNC machined from solid hardwood. Customers have the choice of solid birch, cherry, or walnut along with a variety of design motifs engraved in the front face. 

New Simplified Logo

We have designed a new logo which will be used across our product range to help visually identify the brand. The logo will not replace our current circular logo but will be used in areas more suited to a clean appearance . 



Sound Characteristics 

  • Lifelike presentation of instruments and vocals (Sound signature of the NOS 2P29L Russian Radio Tubes)
  • Extremely low noise floor (achieved with fully balanced architecture)
  • Expressive dynamics especially in the vocal region (all stages are discretely powered and directly heated) 

Features 

  • Zero feedback design 
  • Directly heated regulated filement supply 
  • Custom Cinemag power supply and output transformers 
  • Khozmo Dual-Mono  64-step with Remote Control 4-Source Sequential Selector
    • Ladder type 
    • Vishay resistors 
    • Intelligent start-up 
    • Detent rotary knob (1dB increments)
  • Anodized aluminum remote with left/right channel volume 
    • Input selection 
    • Mute 
    • Left/right independent volume control 
    • Optional hardwood body (please contact) 
  • Low Noise Chassis 
    • Seperate enclosures for power supply, attenuation board, and output tubes 
      • 3mm thick mild steel enclosure for power supply
      • 3mm thick mild steel enclosure for Khozmo Attenuation Board
        • Mechanically isolated using suspension system (see photo) 
      • 3mm thick copper for output tubes mounting plate
        • Mechanically isolated using suspension system (upper section in photo) 
        • Mechanical and EMF isolation for extremely low microphonics 

  • High mass low friction rotary volume knob 
    • Detent operation with 1dB increments 
    • Push selection for toggling inputs 
    • Dual ball bearings for quality feel 
  • Backlit LCD screen 
    • Amber text 

Specifications

  • Frequency Response: 18Hz - 30kHz +/- 0.5dB
  • Power Draw: 45W
  • Output impedance: 293 ohm
  • 13dB gain @ full power
  • XLR: 2 Input (pair) / 1 output (pair)
  • RCA: 2input (pair) / 1 output (pair)

Physical 

  • 460mm wide x 285mm tall x 373mm deep 
  • (18.11" x 11.22" x 14.68")
  • 25Kg (55 lbs) 

Click image below for PDF drawing 


For inquiries please call Troy Joseph Crowe (613-920-5934) or email Joseph_crowe@josephcrowe.com

Back to blog