PA 250 SD
Compact Amplifiers

 
Special features

  • 2-channel digital amplifier

  • Minimum dimension

  • 2 × 50 watts/4 ohms or 1 × 100 watts/8 ohms

  • Remote controllable

  • Automatic switch-on

  • VCA input separated for each channel

  • Symmetric inputs

  • Switchable high-pass filter

Fields of application
  • Home audio
  • Media rooms
  • Conference rooms
  • Shops, sales rooms
  • Gastronomy
  • Clubs, discotheques
  • Concert halls, theatres
  • Churches
Description

The PA 250 SD is a compact, remote controllable 2-channel digital amplifier designed for use in AV systems, multi-room systems and multi-channel PA systems.

The PA 250 SD has compact dimensions and an output power of 2 x 50 watts at 4 ohms and/or 2 x 70 watts at 2 ohms. In bridge mode, it delivers output power of 1 × 100 watts at 8 ohms and/or 140 watts at 4 ohms, guaranteeing excellent sound quality at all times.

The integrated peak limiters prevent distortion if the amplifier is overdriven. To enable remote control, the amplifier is equipped with an automatic switch-on function, an ON/OFF contact and VCA inputs for external volume control.

The amplifiers can be controlled individually or in groups using the WP-V and RP-V volume controllers or the DV module and UP/DOWN contacts. This means that the amplifier does not have to be manually operated, making it ideal for use in combination with built-in speakers in difficult-to-reach locations such as suspended ceilings.

Up to 4 PA 250 SD amplifiers can be mounted in 19” racks in a single height unit (in PA-T 1U). Input sensitivity can be switched from -6 dBu (for connecting computers, MP3 players etc.) to +4 dBu.
Technical data
Inputs 2 × line IN Cinch asym. and screw-type terminals, pluggable, symmetric
Nom. input - 6 dBU/+ 4 dBU switchable
Max. input + 22 dBU
Input impedance 20 kohms
Load impedance ≥ 2 ohms/bridge ≥ 4 ohms
Outputs 2 × speaker out up to 2 × 2.5 mm², (Screw-type terminals, pluggable)
Output power
4 ohms
8 ohms
2 ohms
Bridge
2 × 50 watts
2 × 40 watts
2 × 70 watts
1 × 140 watts (4 or 8 ohms)
Frequency range 30 Hz – 25 kHz (- 3 dB)
THD < 0,05 % (1 kHz, 3 dB at full power)
Dynamic range > 100 dB
Switchablehigh-pass filter 100 Hz (12 dB/Oct) for satellite speaker switchable per channel
Automatic switch on ON if NF signal is present, OFF (stand-by) after more than approx. 15 min. without signal AUTO/STEADY ON selectable per DIP-switch
Controls Gain controls and LED ON at front, DIP-switch at back: Gain, HP Filter, Auto/Steady-ON, Bridge, Ground-Lift
Additional connectors VCA inputs 0 – 10 V for each channel (also for DV-modules),Floating fault contact (N/O), Standby contact (N/O or N/C)
Cooling Fanless
Protective circuits Short circuit and overtemperature protection, inrush current limiter. Peak limiter, current limiter and power limiter for each speaker output
Power supply 230 VAC
Mains connector IEC connector
Power consumption
Standby
Idle
1/8th power
Maximum

1 watts
8 watts
21 watts
60 watts
Dimensions
(W × H × D)
¼ 19", 1U ,110 × 43 × 220 mm
Fixing Mounting bracket (included in delivery)
Weight 1.7 kg
Warranty 5 years
Downloads
Data sheet (PDF)
LB Datasheet PA 250 SD_2023.pdf (2.59 MB)
 
ModelVersion
PA 250 SD
Order No.: 3002-0001
Remote-controllable 2-channel-amplifier with auto-on/off, 2 × line IN cinch
Accessories
WP-V
Order No.: 3401-0003

Wall panel, volume control for amplifiers
of the PA Series for surface boxes.
RP-V
Order No.: 3401-0004

Rack panel, volume control for amplifiers of the PA Series to install in 19“rack mount RP-1U.
RP-1U
Order No.: 3402-0016

19“ Rack mount, 1U, for 6 × RP panels
DV-Modul
Order No.: 3109-0006
Digital volume control for amplifiers of the PA Series.
PA-T 2050
Order No.: 3109-0001
100 V transformer module, 2 × 50 watts, toroidal core
PA-T 1U
Order No.: 3109-0005
Rack cradle 19“, 1U for 4 × PA-T 2050, 4 × PA-T 100, 2 × PA-T 200, 2 × PA-T 400