Brown LS 150PA

Data

General

• Manufacturer: Braun
• Model: LS 150 PA
• Type: Active loudspeaker
• Years of manufacture: 1982 - 1988
• Manufactured in:
• Colors:
  • 1983: Black, other colors on request
  • 1984 - 1986: Black, White, other colors on request
  • 1987 - 1988: Black, Grey, Redwood
• Power consumption: max. 450 W, standby: 3 W
• Dimensions: 1060 x 265 x 300 mm (HxWxD)
• Gross volume: 70 l
• Weight: 21,5 kg
• Original price approx.: 2'300 DM per piece

Connections

• Number of inputs:
• Input: Cinch
• Sensitivity: 1 V / 22 kOhm, preamplifier or 10 V/600 Ohm, power amplifier switchable

Technical data

Amplifier

• Rated power: woofer channel 130 W; mid/high channel 80 W.
• Music power: low frequency channel 180 W; mid/high frequency channel 120 W
• Power bandwidth PA 1: 10 Hz - 80 kHz
• Power bandwidth LS 150 active: 18 - 30 kHz
• Crossover frequency: 700 Hz
• Crossover: 12 dB/octave
• Attenuation factor: 80 at 100 Hz, 45 at 10 kHz
• External voltage spacing: both channels 100 dB
• Crosstalk attenuation (1 kHz): 80 dB

Loudspeaker

• Construction: 3-way closed, floorstanding speaker
• Chassis:
  • woofer: 2x 210 mm cone

midrange driver: 1x 50 mm dome tweeter Tweeter: 1x 25 mm dome tweeter

• Power handling (nominal / music): 150 W / 300 W
• Efficiency: 91 dB / W / m
• Frequency response: 18 - 25'000 Hz
• Transitional ranges: 500 / 4'500 Hz
• Impedance: 8 Ohm

Special Features

• VV and signal decoder are operated in standby circuit, the power amplifier is automatically switched on or off.
• Can be operated at preamplifier or power amplifier
• Fuses for tweeter and midrange driver
• Grille made of perforated steel, covered with acoustic fleece on the inside

Remarks

• Other models of the same series:
• Braun LS 40
• Braun LS 60
• Braun LS 70
• Braun LS 80
• Braun LS 100
• Braun LS 120
• Braun LS 130
• Braun LS 150
• Braun LS 150PA
• Braun LS 200
• Braun SW 2 (subwoofer)

Pictures

• Extract from brochure: Braun LS 150

Reports

• Report at "Radiomuseum": The floorstanding speaker LS 150 active is mentioned together with the passive variant LS 150 for the first time in the catalogue Sept. 1982, additionally the amplifier insert PA1 as a blurb of the front page. Both are described as new, but the PA1 is without further technical details. In the following year (Aug. 1983, Braun Hifi. Zukunft als Konzept.) both are again described as new, but the technical data of the PA1 are given in detail for the first time. Looking at the active version in the context of the Braun amplifier spectrum from 1983 - 1986, it is noticeable that there is no separate Braun preamplifier during this period. So the LS 150 active can only be connected to Atelier-A2, where you can decouple the signal behind the VV. But there remains the investment in two power amplifiers. It wasn't until 1987 that the Atelier CC 4 appeared as an adequate partner as preamplifier (+ tuner).

In Nov. 1984, the LS 150 speaker (optically) and the PA1 power insert were modified electrically (now PA1/1). The revised version is recognisable by the following features:

• • omission of the previously light-coloured trim rings on the LS drivers.

HT driver has been acoustically reworked

• • resistor circuit of the OV IC 501a has been changed, capacitor C 622 is omitted, C 621 + C 508 have been modified.