The LR-300 Digital Receiver is a low-cost digital receiver. It has the same exceptional audio quality as Listen's full-featured receivers and the same convenient recharging options. The LR-300 does not use an LCD, but instead a multi-function LED. The LR-300 utilizes the 17 most common wide band channels, with a SEEK channel selection
button located behind a lockable door panel. It takes AA batteries (alkaline or NiMH rechargeable). SmartChargeTM capabilities prevent overcharging. An LED indicates power to the unit.
Please Note: Does not include batteries or earphone/headphone
• Exceptional audio quality! 80 dB signal-to-noise ratio!
• 17 field tunable channels (unless electronically locked on one channel).
• SEEK button behind mechanically locking door, thus discouraging end users from changing the channel selected.
• Excellent for schools, language interpretation, museums, and tour group applications where users do not change channels
• 100 % Digital - Listen receivers are digitally-tuned so transmission won't drift; assurance that when you select
a channel, it stays on channel!
• Built in SmartCharge™ won't allow batteries to overcharge! Charging circuitry is conveniently built
into Listen's receivers; never worry about unplugging a transformer at a certain time.
• Transformer charging plug or for the ultimate in convenience drop in charging contacts.
1. Line-level earphone jack (3. 5 mm) accepts either mono or stereo headsets. Receiver antenna is built into the earphone cord, eliminating additional wires while maximizing receiver effectiveness.
2. Multifunction LED indicates power on, if batteries are low, and charging status.
3. Easy on/off volume control.
4. Manually lockable battery compartment door.
5. Exclusive belt clip “loop” prevents unit from slipping off belt or strap.
6. Charging plug port.
7. Digitally tuned with SEEK button behind manually lockable door. Electronically lock on channel by holding the SEEK button down 5 seconds to prevent tampering.
8. Uses two AA batteries. Selectable to use either alkaline or Listen's advanced NiMH Rechargeable AA Batteries. SmartCharge™ incorporated into receiver makes sure each unit receives the most beneficial charge.
9. When enabled, SQ provides highest audio quality available in its product category. SQ can be disabled for compatibility with other assistive listening equipment.
10. Contact points for Listen's drop in charging cases.
architectural specifications
The FM receiver shall be capable of receiving on 17 wide band channels and have a SNR of 80dB or greater. The receiver shall be capable of seeking channels. The device shall have a squelch. The device shall have an audio frequency response of 50Hz to 15KHz, ±3dB at 72MHz. The device shall incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset and listen to audio normally. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen LR-300 is specified.
| |
Specification |
LR-300-072 |
| RF |
Number of Channels |
17 (wide band) |
| Sensitivity |
.6uV typical, 1 uV maximum for 12dB SINAD |
| Frequency Accuracy |
'± .005% stability 0° to 50°C (32° to 122° F) |
| Antenna |
Uses earphone cable |
| Antenna Connector |
3.5mm connector |
| Squelch |
Automatic on loss of RF signal |
| Compliance |
FCC Part 15, Industry Canada |
| Audio |
** All system specifications are wireless end-to-end |
| System Distortion |
<2% total harmonic distortion (THD) at 80% deviation |
System Signal-to-Noise Ratio
(A-weighted) |
SQ enabled: 80dB; SQ disabled 60dB |
| System Frequency Response |
63Hz - 15kHz (±3dB) |
| Output |
3.5mm connectors, unbalanced, 0dBu nominal output level, 16mW maximum, impedance 32 Ohms |
| Controls |
Set-up Controls
|
Alkaline/NIMH batteries, SQ enable/disable |
| User Controls |
Volume, SEEK (Channel SEEK is electronically lockable) |
| Programming |
Channel selection can be locked by holding the SEEK button 5 seconds. |
| Indicators |
LED |
Red, illuminates when unit is on. Flashes when batteries are low. Flashes when charging. Flashes when locked and user attempts to seek to another channel. |
| Power |
Battery Type |
Two AA batteries, alkaline or NMH |
| Battery Life (Listen batteries) |
30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362) |
| Battery Charging (NiMH only) |
Fully automatic, 14 hours |
| Power Supply Connector |
2.3mm OD by 0.7mm ID, barrel type connector, 7.5VDC, center positive <250mA. Drop in contact points for use with Listen charging cases. |
| Compliance |
UL Listed |
| Physical |
Dimensions |
3.0 in x 1.0 in x 5 in WxDxH (7.6cm x 2.5cm x 13cm) |
| Unit Weight |
3.9 oz (111 kg) |
| Unit Weight with Batteries |
5.8 oz (164.4 g) |
| Shipping Weight |
1.0 lbs (453.6 kg) |
| Door |
Manually lockable. SEEK behind the door. |
| Environmental |
Temperature - Operation |
'-10° to +40°C (14° to 104° F) |
| Temperature - Storage |
'-20° to +50° (-4° to 122° F) |
| Humidity |
0 to 95% relative humidity, non-condensing |
FAQs
Q. What is the difference between the LR-300 and the LR-400?
A. The LR-400 is more "user friendly" because it has the LCD Display, which will show the channel selection, battery life and signal strength.
Q. Is the LR-300 a single channel receiver?
A. No, this is a 17 channel wide-band receiver.
Q. Does this receiver sound as good as your other receivers, which are more expensive?
A. Yes, all Listen receivers have the same superior audio quality.
Q. How many receivers can I have in a system?
A. As many as you need, the number is endless.
Q. Can I use the LR-300 with the LT-700?
A. If using the LT-700 portable transmitter we DO NOT recommend using the LR-300 with it. The LR-300 was designed to be used with the LT-800 transmitter only.
LR-300 Datasheet
Stationary FM Brochure
• LR-300 Portable FM Receiver
• Owner's manual (72 MHz)
Please Note: Does not include batteries or earphone/headphone
