Altec Lansing MR94/MR64 (1978)
A pair of large-format manta ray horn speakers introduced in 1978, differing in width but sharing the same height and depth.
Overview
The Altec Lansing MR94 and MR64 are horn loudspeakers released in 1978, distinguished by their manta ray horn design—also known as Rehhorn, Lehorn, or Rayhorn. These horns were engineered for uniform directional dispersion across their operating range, minimizing the beam-like narrowing of sound at higher frequencies. The MR94 and MR64 differ primarily in width, with the MR94 being larger in that dimension, while both models share identical height and depth measurements. Each model was designed to maintain consistent frequency response both on-axis and off-axis, a key feature of the manta ray horn's acoustic performance.
Specifications
| Model Rating Type | Horn |
| Directional characteristics | Horizontal : 90 °, Vertical : 40 degrees |
| Throat diameter | 36mm |
| External dimensions MR94 | Width 864 x Height 610 x Depth 711 mm |
| External dimensions MR64 | Width 711 x Height 610 x Depth 711 mm |
| Weight MR94 | 12.7kg |
| Weight MR64 | 11.3kg |
Design
The manta ray horn design—referred to interchangeably as Rehhorn, Lehorn, or Rayhorn—ensures excellent uniformity in directional characteristics throughout its operating frequency band. This design prevents the sound dispersion from becoming beam-like as frequencies rise, maintaining consistent performance across listening positions. A key feature is the minimal difference in frequency response between on-axis and off-axis points, enhancing spatial sound reproduction.
Market
The MR94 had an original price of ¥141,100 around 1982, indicating its position as a high-end audio product at the time.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.