light red to indicate that the batteries in the headphones are being charged. If signal is present at the transmitter audio input, the POWER ON/CHARGE-LED (11) will light orange. The batteries will be fully charged after approximately 7 hours. (The POWER ON/CHARGE LED (11) will continue lighting red.). You may leave the headphones on the trans- mitter for as long as you like without risking to overcharge the batteries.

Important: In order to maintain full battery capacity for as long as possible, discharge the batteries completely about once a month:

Switch the headphones on and leave them outside the transmitter until the POWER LED (2) extinguishes. Press the POWER switch (1) once to switch the headphones off.

Recharge the batteries as described above.

6.4 Replacing Batteries

The capacity of any rechargeable battery will decrease over time. If you feel that you need to recharge the supplied batteries more often than would be convenient, you may consider replacing the batteries with new AAA size 1.2 V rechargeable or 1.5 V alkaline dry batteries.

1.Remove the ear pad from the left-hand earphone as shown in fig. 9.

2.Remove the old batteries.

3.Referring to fig. 10, insert the new batteries into the battery compartment (4). Make sure to align the batteries with the polarity marks inside the battery compartment.

4.Replace the ear pad on the earphone aligning the four pins on the ear pad with the matching openings in the earphone base plate.

6.5 Setting Up the System

1.Remove the headphones from the transmitter.

2.Switch ON the audio source to which the transmitter is connected.

If audio signal is present at the transmitter input, the POWER

ON/CHARGE LED (11) on the transmitter will light green. Note: If no signal arrives at the transmitter input for approx.

3 minutes, the transmitter will automatically switch off and the POWER ON/CHARGE LED (11 will extinguish.

3.Set the FREQ ADJUST control (9) on the transmitter to its center position.

4.Use the POWER switch (1) to switch the headphones on, so that the green POWER LED (2) will light. Press the AUTOTUNING switch (5) on the headphones.

The Autotuning function will automatically tune the reception frequency to the carrier frequency set on the transmitter. After a few seconds, you should hear the signal in the headphones clearly and free of interference.

If your first try fails, set the FREQ ADJUST control (9) to a different position and press AUTOTUNING (5) again. Be sure not to rotate FREQ ADJUST (9) all the way CW or CCW because optimum reception may not always be guaranteed at the ends of the frequency band.

5.Set the VOLUME control (6) on the headphones to the desired volume level.

Note: If the transmitter signal is disturbed, e.g., by reflections (multi- path reception) or shadow effects, the headphones will auto- matically mute. This function eliminates interference related noise.

6.6 POWER ON/CHARGE LED Status

If LED is...

Transmitter...

 

 

 

…lighting green:

…is connected to AC power and audio

 

 

source

and

receives

signal.

 

Headphones are not on the transmitter,

 

charging function is off.

 

 

…lighting orange: …is connected to AC and audio

source and receives signal. Headphones are on the transmitter, charging function is on.

…lighting red:…has detected no signal for several minutes, headphones are on the trans- mitter, charging function is on.

…dark:…has detected no signal for several minutes, headphones are not on the transmitter, charging function is off, OR …is not connected to AC power.

7 Important Notes

1.Operating switches on or connecting the transmitter to your audio source may cause clicks which at high volume settings may affect your hearing. Therefore, be sure to set the VOLUME control on the headphones to minimum before switching between different sources (tuner, turntable, CD play- er, etc.) or connecting the transmitter.

2.Listening over headphones at high volume levels, particularly over extended periods of time, may damage your hearing.

3.Your K 305 AFC/K 405 AFC is a radio frequency device that conforms to the strict European and FCC standards. For physical reasons that have nothing to do with the quality of the product, extremely strong interference sources may affect reception. In order to maintain interference-free listening plea- sure, do not operate your K 305 AFC/K 405 AFC in the close vicinity of radio equipment, cellular telephones, or direct- ly above TV or computer monitor picture tubes. The supplied connecting cable is long enough to allow the transmitter to be placed at a safe distance from interference sources.

Interference caused by other users of the 914 or 864 MHz LPD band are beyond AKG’s control.

8 Specifications

System Performance

Modulation:

FM

Carrier frequency band:

914/864 MHz (LPD band)

T 305 AFC/T 405 AFC Transmitter

Power supply:

12 VDC, 200 mA

Radiation angle:

approx. 360°

Weight:

approx. 9.2 oz. (260 g)

Max. range:

approx. 330 ft. (100 m)

K 305 AFC Headphones

Power supply:

3 VDC (2 x 1.2 V AAA size NiCd

 

rechargeable batteries supplied)

Battery life:

approx. 10 hours

 

(NiCd rechargeable batteries)

Frequency range:

20 Hz to 22,000 Hz

K 405 AFC Headphones

Power supply:

3 VDC (2 x 1.2 V AAA size NiMh

 

rechargeable batteries supplied)

Battery life:

approx. 20 hours

 

(NiMh rechargeable batteries)

Frequency range:

20 Hz to 24,000 Hz

K 305 AFC/K 405 AFC Headphones

Max. SPL:

>110 dB SPL

Weight:

approx. 8.1 oz. (230 g)

Distortion:

<1%

Type:

semi-open dynamic headphones

8

Page 7 Page 9
Page 8
Image 8
AKG Acoustics K 305 AFC, K 405 AFC manual Important Notes, Specifications
Page 7 Page 9

K 405 AFC, K 305 AFC specifications

AKG Acoustics has long been known for producing high-quality audio equipment, and their headphones are no exception. Among their impressive lineup, the K 305 AFC and K 405 AFC stand out as exceptional models that cater to both audiophiles and casual listeners alike. These headphones are characterized by innovative technologies, robust build quality, and superior sound performance.

The AKG K 305 AFC headphones feature a closed-back design, which provides excellent noise isolation, allowing users to immerse themselves fully in their music without external distractions. Equipped with AKG's proprietary transducers, these headphones deliver an exceptionally broad frequency range, ensuring that every nuance in the audio is reproduced accurately. The K 305 AFC is designed for extended listening sessions, with plush ear pads and an adjustable headband that provide enhanced comfort.

Key features of the K 305 AFC include a lightweight construction combined with foldable design, enabling easy portability. These headphones are perfect for on-the-go listening, as they can easily fit into a bag without taking up much space. The K 305 AFC also includes a detachable cable, which adds to their durability and convenience. The microphone integrated into the cable allows for hands-free calls, showcasing the model’s versatility in various environments.

On the other hand, the AKG K 405 AFC takes the experience a step further with its advanced active noise-canceling technology. This feature significantly reduces ambient noise, offering users an entirely immersive experience. The K 405 AFC is equipped with a battery-powered system that enhances sound quality while mitigating external sounds effectively. The sophisticated sound signature retains the same clarity and detail as the K 305 AFC but delivers a more focused listening experience in noisy environments.

Another standout characteristic of the K 405 AFC is its ability to connect wirelessly via Bluetooth, providing the freedom of movement that modern listeners desire. The headphones boast a long battery life, making them ideal for long flights or daily commutes. Ergonomically designed, both models feature adjustable components that cater to different head sizes, ensuring a snug fit for optimal sound delivery.

In conclusion, both the AKG K 305 AFC and K 405 AFC cater to music lovers with their advanced technology, exceptional sound quality, and user-friendly features. Whether you prioritize portability and comfort or advanced noise cancellation and wireless connectivity, AKG has created headphones that serve a wide range of listening needs while maintaining the brand's commitment to audio excellence.
Top Page Image Contents