HL240-VQ Key Features
Connectivity
- POTS telephone lines: 2 analog hybrids with adjustable rejection.
- Bluetooth 4.0: two independent channels with HSP / HFP / A2DP profiles.
- VoIP compatibility: through ATA adapters or Bluetooth-enabled VoIP phones.
- Solidyne console interface: direct hybrid send/return connection (2300, 2600, DX816/822, D612 series).
Inputs and Outputs
- AUDIO IN (Send to Lines): unbalanced, for mix-minus feed from console.
- AUDIO OUT (Mix): balanced XLR output, delivers total line mix.
- PH-1 and BLT-1 direct outputs: unbalanced, pre-fader, fixed level.
- Headphone output: direct monitoring of main mix.
Audio Processing
- VQR (Voice Quality Restoration): bass reconstruction down to 50 Hz and treble up to 12 kHz.
- NOISE Control: noise gate to reduce background during conversation pauses.
Operation
- Illuminated buttons: line status and ring cadence.
- Built-in Talkback: enables private conversation with caller.
- Priority system: 10 dB attenuation of line audio when local voice is detected.
- Conference: internal mixing of up to 4 lines (2 POTS + 2 Bluetooth).
Performance
- Frequency response: 50 Hz – 12 kHz with VQR // 300 Hz – 3.4 kHz without VQR.
- Signal-to-noise ratio: 70 dBA with VQR.
- THD: < 0.2%.
- Hybrid rejection: > 40 dB (measured with 2 km artificial line).
Construction and Power
- 19” rack format: 1U height. Includes rubber feet for desktop use.
- Internal regulated power supply: 110/220 V switchable, 20 W consumption.
- Surge protection: metal oxide varistors withstanding up to 2,000 V.