TLS-4
| Brand | HHR Exotic Speakers |
| Manufacturer | H & H Research |
| Designer | Dale Harder, Lincoln Walsh |
| Function | Speaker (Midrage/Tweeter Module) |
| Produced | 2013-2019 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Weight | 2.5lbs |
| Frequency Response | 200Hz-25kHz |
| Driver | 6.5"x4.5 (HxW) Walsh Wave Transmission Line Driver (US Patent #3,424,873, AlNiCo Magnet) |
| Sensitivity | 90dB/W/m |
| Impedance (Nominal) | 4Ω |
| Dispersion (Horizontal) | 360° |
| Dispersion (Vertical) | 50° |
| Recommended Amplifier Power (RMS) | 50W |
| Power Handling (Continuous) | 40W |
| Power Handling (Peak) | 150W |
| Links | Product Page |