Product description
Lyndahl AMP4X15BT – 4-channel Bluetooth amplifier with AUX
The AMP4X15BT is a compact Class D amplifier with 4 channels (2× stereo), Bluetooth 5.0 and an AUX input. It distributes music from a single source to up to four speakers – ideal for multiroom and in-wall sound in homes, hotels, hospitality, practices or offices. Thanks to its small dimensions (just 130 × 62 × 28 mm), high output and low heat generation, it disappears out of sight in a suspended ceiling, cupboard or piece of furniture.
Powerful, clean Class D sound
Four independent channels deliver 15 W RMS per channel (60 W total, 120 W music power) into speakers of 4–8 ohms. A frequency range of 20 Hz to 22 kHz, low distortion (THD approx. 0.06 %), a signal-to-noise ratio of 80 dB and 85 dB of channel separation ensure a clear, well-defined sound – efficient and cool thanks to modern Class D technology.
Bluetooth 5.0 & AUX input
Stream music wirelessly and reliably via Bluetooth 5.0 from a smartphone, tablet or laptop – the amplifier simply appears as "AMP4X15BT" in the device list. The additional 3.5 mm AUX input lets you connect further sources such as CD or MP3 players. Bluetooth always takes priority; the AUX input is active whenever no Bluetooth playback is running.
Switches on automatically
As soon as playback starts, the amplifier switches on automatically – there is no need to power it up and down manually. In standby it draws only approx. 0.8 watts, making it particularly energy-efficient.
Flexible: two or four speakers
Run two or four speakers – each on its own channel. The unit is designed so that operation with fewer than four speakers (open channels) is perfectly safe and causes no damage. This lets you match the sound system exactly to the room and to your needs.
Safe and durable
A speaker protection circuit (Speaker Guard®) plus an amplifier protection circuit against short circuit, ground fault and overload reliably protect both the electronics and your speakers. The unit must be operated exclusively with the supplied, GS-approved 12 V original power supply (100–240 V, 4 A). Operating temperature: -10 to +40 °C, for dry indoor use.
Compact, cool, invisibly installed
Its small size and low heat generation allow the AMP4X15BT to be tucked away discreetly in suspended ceilings or furniture. Important: always keep the ventilation slots of the amplifier and the power supply clear and do not embed them in insulation material, so that air can circulate.
Easy connection – with a professional tip
The speakers are connected via the two supplied 4-pin screw terminal connectors (strip about 5 mm of the cable and mind the correct polarity – red conductor = positive). For the AUX input: use only high-quality, well-shielded jack cables – inferior cables cause hum and crackling.
A perfect match
The AMP4X15BT is an ideal partner for the in-wall and ceiling speakers of the Lyndahl CS series (e.g. CS200S or CS234T) – amplifier and speakers from a single source for a turnkey multiroom solution.
Technical data
| Amplifier class | Class D |
| Channels | 4 (2× stereo) |
| Output power | 15 W RMS/channel · 60 W total (120 W music power) |
| Speaker impedance | 4–8 ohms |
| Frequency range | 20 Hz – 22 kHz |
| Distortion (THD) | approx. 0.06 % (at 7.5 W/channel) |
| Signal-to-noise ratio / channel separation | 80 dB / 85 dB |
| Bluetooth | Version 5.0 |
| AUX input | 3.5 mm stereo jack socket |
| Protection circuits | Speaker Guard® + short-circuit/ground protection |
| Operating temperature | -10 to +40 °C |
| Power supply | 100–240 V via 12 V DC / 4 A power supply (GS-approved) |
| Standby consumption | approx. 0.8 watts |
| Dimensions | 130 × 62 × 28 mm |
Scope of delivery
- AMP4X15BT amplifier module
- 12 V energy-saving power supply (GS-approved)
- 2× 4-pin connector for the speaker connection
- User manual
