LTL / Lithos Transmission Line

Pure Geometry. Pure Sound.

// The Waveguide

ACOUSTIC MAZE

  • Continuous organic pathway to prevent reflections and turbulence
  • Progressive geometric reduction as passive mechanical low-pass filter
  • Mathematically tuned to free-air driver resonance
  • Orthogonal spatial exit for omnidirectional low-frequency coupling
// The Signal

NO ELECTRONICS

  • Straight amplifier-to-voice-coil signal path
  • No electronics, capacitors, inductors, resistors, filters, or crossovers
  • Zero phase shift and circuit-induced signal degradation
  • No energy loss or frequency dips
LTL Direct Amplifier-to-Voice-Coil Terminals
// The Dynamics

PRISTINE ACOUSTICS

  • Strictly mechanical filters for linear response
  • True single point-source radiation for entire frequency spectrum
  • Perfect phase linearity and holographic time-alignment
  • Pristine dynamics with instantaneous transient response
LTL MAOP 7 Transducer
// The Material

FIRST PRINCIPLES

  • Monolithic concrete pour with ultra-high-performance concrete
  • Massive inertial damping to prevent cabinet coloration
  • No internal insulation, porous damping, or fluff for an unrestricted, high-velocity air pathway
  • No creases, sealing, glue-ups, or micro-pores
LTL Monolithic Concrete Texture
// The Product

SEAMLESS, STATELESS, TIMELESS

  • Single-cast concrete body with zero seams, structural flex, or cabinet coloration
  • Purely mechanical low-pass filter
  • High-density concrete immune to wear and age
  • A permanent physical and acoustic presence
LTL Monolithic Concrete Speaker

Acoustic Specifications

// Physical Parameters

Cabinet

  • Width (W): 170 mm
  • Height (H): 530 mm
  • Depth (D): 390 mm
  • Total Mass: 55 kg
LTL Monolithic Concrete Cabinet
// Acoustic Labyrinth

Transmission line

  • Acoustic Length: 1147 mm
  • Throat Area (D0): Sd × 2.5
  • Terminus Area (DE): Sd × 0.45
  • Taper Profile: Logarithmic
  • Download 3MF Model
// Material Formulation

Concrete Mix

  • Portland Cement: 55%
  • Silica Sand: 45%
  • Polypropylene Fiber: 2%
  • Matrix: Ultra-High Performance Concrete (UHPC)
LTL Monolithic Concrete Composition
// Transducer Architecture

Driver

  • Transducer: MarkAudio MAOP 7 Full-Range
  • Cone Material: Micro-Arc Oxidized Aluminum (MAOP)
  • Frequency Range: 77 Hz — 30,000 Hz
  • Nominal Impedance: 6 Ohms (Re: 5.4 Ohms)
  • Sensitivity: 85.8 dB @ 1W / 1m (Fs: 73 Hz)
LTL Full-Range Driver Integration