| HED 021 |
| Style |
Mono, folding headphone |
| Plug |
3.5mm mono |
| Driver Size |
30 mm |
| Nominal Impedance |
32Ω |
| Frequency Response |
20 - 20kHz |
| Max Power Input |
100 mW |
| Sensitivity |
110 dB @ 1kHz |
| Replacement Pads |
HED 023 (one pair) |
| Cord Length |
39" (990.6 mm) |
| Weight |
0.115 lbs (0.052 kg) |
| IR T1 |
| Power Supply |
TFP 055 – 100-240VAC 50/60Hz Input
5VDC, 1A USB Output, Universal Supply with international adapters
Other USB Power Supply (must be at least 5VDC, 0.2A) |
| Power Cable |
USB to micro USB cable |
| DC Power Input |
Micro USB connector, 5VDC, 0.2A |
| Sleep/Power Save Mode |
Shuts off carrier when no audio present for 12 minutes |
| Modulation |
FM Wideband, ±50 kHz deviation max, 50 μS pre-emphasis |
| Carrier Frequencies |
2.3MHz (Ch 1) and 2.8MHz (Ch 2)
Default at power on = carriers off
Carriers are automatically enabled upon presence of audio |
| Coverage Area |
1,000 sq. ft (96 sq. m.) |
| Audio Inputs |
3.5mm stereo line level input jack, Ch 1 connected to tip, Ch 2 connected to ring, GND connected to sleeve |
| Audio Indicators |
One Yellow LED per channel, lights up and stays on steady with minimum audio level |
| Signal-to-Noise Ratio |
70 dB at onset of limiting |
| Frequency Response |
100 - 12,000 Hz |
| Operating Requirements |
32° - 122°F (0 - 50°C) |
| Mounting Kit |
Optional: STD 008 TV Top Shelf Mounting Kit
Optional: BKT 024 Omnidirectional mount for wall or ceiling mounting |
| Compatible Receivers |
WIR RX22-4, WIR RX18 |
| STD 008 |
| Shelf Support |
Front padded lip rests on TV
Adjustable arm with swivel lock supports rear of shelf |
| Dimensions (W x Dia) |
6" (152.4 mm) x 4.75" (120.65 mm) |
| Weight |
0.6 lbs (0.27 kg) |
| WIR RX22-4N |
| Receiver Style |
Body-Pack, dual-lens detector, lanyard |
| Lanyard |
3 ft (0.91 m), allows receiver to be worn around the neck |
| Operating Temperature |
-10° C to +50° C |
| Battery Type |
2 x AA, alkaline (BAT 001-2) or NiMH (BAT 026-2) |
| Battery Life |
Alkaline: 60 hours, NiMH: 30 hours/charge |
| Battery Drain |
25 mA, nominal |
| Charging Contacts |
For use only with CHG 3512 |
| Carrier Frequency |
Channel 1: 2.3 MHz, Channel 2: 2.8 MHz
Channel 3: 3.3 MHz, Channel 4: 3.8 MHz |
| De-Emphasis |
50 uS |
| FM Deviation |
±50 kHz |
| Signal-to-Noise Ratio |
60 dB min. |
| Squelch |
Receiver squelches (mutes) at 28 dB S/N ratio |
| Frequency Response |
25 Hz to 16 KHz, +1 dB, -3 dB, electrical response |
| Total Harmonic Distortion |
Less than 1%, electrical response |
| Audio Output Jacks |
3.5 mm stereo mini phone jack
Accepts 3.5 mm mono or stereo phone plug |
| Audio Output Power |
15 mW max at 32 Ω |
| Acoustic Output |
125 dB SSPL90 with HED 021; 110 dB SSPL90 w/ EAR 013 |
| Sensitivity |
Better than 1 nW/cm2 for 40 dB signal-to-noise ratio |
| Dimensions (H x W x D) |
1.2" (30.48 mm) x 4.1" (104.14 mm) x 2.85" (72.39 mm) |
| Weight |
0.28 lbs (0.127 kg) |
