Bosch PLN 1LA10 Plena Loop Amplifier

The PLN-1LA10 Loop Amplifier is a professional hearing assistance solution engineered to deliver clear, immersive sound coverage in concert halls, studios, performance venues, and public spaces. Designed to enhance accessibility without compromising audio quality, it provides a seamless listening experience with outstanding speech intelligibility and rich sonic detail. Ideal for live entertainment and professional audio environments, the PLN-1LA10 helps create a more inclusive atmosphere where every listener can experience performances with clarity, depth, and confidence.

Features

• High power, current driven amplifier
• Two microphone/line inputs, one priority input (100 V)
• Selectable frequency range and tone controls
• Limiter and automatic gain control (AGC)

Specifications

General
Dimensions (H x W x D): 94 x 430 x 320 mm
Weight: 11.60 kg
Operating Temperature: -10 °C to 55 °C

Power
Power Supply: 230/115 VAC, ±10%, 50/60 Hz
Inrush Current: 7 A at 230 VAC / 14 A at 115 VAC
Max Power Consumption: 500 VA

Performance
Output Current: 10 A
Frequency Response: 50 Hz to 10 kHz (+1/-3 dB at -10 dB ref. rated output)
Distortion: <1% at rated output power, 1 kHz
Bass Control: -8/+8 dB at 100 Hz
Treble Control: -8/+8 dB at 10 kHz

Mic/Line Input
Quantity: 2 x
Connector: 3-pin XLR, balanced mic/line level (switchable)
Sensitivity: 1 mV / 1 V (mic/line)
Impedance: >1 kohm
Dynamic Range: 100 dB
S/N Ratio (Flat at Max Volume): 75 dB
Headroom: 25 dB
Phantom Power Supply: 16 V (switchable)
VOX Functionality: Input 1 (switchable) mutes Input 2
VOX Sensitivity: -10 dB ref nominal input

Screw Input
Sensitivity: 100 V, transformer balanced
Impedance: >100 kohm
S/N Ratio (Flat at Max Volume): 63 dB
Headroom: 25 dB
Pilot Tone Detection: -20 dB, ref 100 V (10 V)
Pilot Tone Threshold: -26 dB, ref 100 V (5 V)

Master Input
Quantity: 1 x
Connector: 1/4" TS Jack

Line Output
Connector: 3-pin XLR, balanced
Nominal Level: 1 V
Impedance: 200 ohm

Loop Output
Connector: Screw

Slave Output
Function: For master input of other PLN-1LA10
Connector: 1/4" TS Jack

Contacts
Angle Range: 0° to 90°
Screw Contacts: 100 V, 2 A (voltage free, SPDT)