Description:
ROLLS DB14B
A/V Presenter Passive Direct Box with Independent Volume Control
General Description
The ROLLS DB14B is a special-purpose passive direct box designed for applications where a source stereo signal can be separated with independent volume controls for each channel. This innovative device features a mono-summed XLR output, making it ideal for various applications such as A/V presentations from laptops, choir rehearsals with music tracks, or any situation requiring stereo signal separation with individual volume control. The DB14B goes further by incorporating hum elimination through a convenient ground lift switch, ensuring a clean and interference-free audio experience. Its versatility is enhanced by the inclusion of RCA and 3.5mm (1/8") stereo inputs, along with two volume controls, RCA and XLR outputs, all without requiring any external power source. Manufactured by Rolls Corporation with over 40 years of experience in professional and accessible audio solutions.
Technical Specifications
| FREQUENCY RESPONSE | |
|---|---|
| Full Range | 50 Hz - 16 kHz |
| Low Impedance | Optimized 50Hz-16kHz |
| Flat Response | Yes - Audio Transparency |
| INPUT LEVELS | |
| Maximum Input Level | +20 dB |
| Signal Handling | Robust Professional Level |
| Input Impedance | High - Minimal Load |
| INPUT CONNECTORS | |
| RCA Stereo Input | Dual RCA Left/Right |
| 3.5mm Input | 1/8" Stereo TRS |
| Input Compatibility | Laptop, Tablet, Smartphone, DJ |
| Multiple Connectors | Yes - Selectable |
| OUTPUT LEVELS | |
| Maximum RCA Output Level | +20 dB |
| Maximum XLR Output Level | 0 dB |
| Output Configuration | RCA Stereo + Mono Summed XLR |
| OUTPUT CONNECTORS | |
| RCA Output | Stereo Left/Right |
| XLR Output | Balanced Mono Male |
| Balanced Transformer | Yes - Professional Isolation |
| CONTROLS AND FEATURES | |
| Volume Control | Two Independent Right/Left |
| Individual Channel Control | Yes - Precise Adjustment |
| Ground Lift Switch | Yes - Hum Elimination |
| Noise Elimination | Yes - Ground Loop Isolation |
| Mono Summing | Yes - Summed XLR Output |
| ACOUSTIC PERFORMANCE | |
| Total Harmonic Distortion | < 0.1% 50Hz-16kHz |
| Dynamic Range | > 90 dB |
| Extreme Signal Handling | Yes - Distortion-Free |
| CONSTRUCTION AND DURABILITY | |
| Chassis | Robust Professional Metal |
| Finish | Black Powder Coat |
| Construction | Compact Portable |
| DIMENSIONS AND WEIGHT | |
| Width (W) | 2.0" (50 mm) |
| Height (H) | 4.0" (102 mm) |
| Depth (D) | 1.5" (38 mm) |
| Weight | 1 lb (0.45 kg) |
| OPERATIONAL FEATURES | |
| Design | Fully Passive |
| Power | Not Required - Plug & Play |
| Cable Runs | Long without Degradation |
| Special Application | Stereo Signal Separation |
| APPLICATIONS AND COMPATIBILITY | |
| A/V Presentations | Yes - Specialty |
| Laptop/Computer | Yes |
| Choir Rehearsals | Yes - Music Tracks |
| Tablet/Smartphone | Yes - 3.5mm Input |
| DJ Mixer | Yes - Line Output |
| Digital Keyboard | Yes |
| Individual Volume Control | Yes - Each Channel |
| ACCESSORIES AND OPTIONS | |
| Manufacturer | Rolls Corporation - USA |
| Model | DB14B |
| Sale | Per unit |
| Manual Available | Yes - Downloadable |
Ideal for
The ROLLS DB14B is ideal for professional presenters who require independent volume control per channel, choirs and vocal groups rehearsing with music tracks, audiovisual presentations in corporate, church, and religious settings, educators needing stereo signal separation, DJs with portable gear, live music producers, sound technicians with portable systems, users who value robust Rolls construction, any application requiring a passive direct box with independent volume control, and professionals looking for reliable hum elimination with integrated ground lift.