Like all Fohhn Perform-Series models, the PT-70 has been specially developed for concert sound and touring. The horn-loaded, passive, two-way speaker makes an ideal compact sound reinforcement system for concerts in halls, tents and clubs, or for town festivals and smaller open-air events. It also functions as a solid extension for larger line arrays or Beam Steering systems, as well as offering a multi-functional plug & play solution for the rental market.
The PT-70's unique selling point is its Fohhn engineered Convertible Dispersion Technology (CDT). This technology - which is also registered as a utility model - enables the loudspeaker to be manually switched between vented and cardioid operational modes. In the latter case, this means significantly less sound being transmitted onto the stage area from the rear of the speaker, resulting in the best possible levels of sound quality and speech intelligibility.
The PT-70 has 2 x 12" chassis with compression chamber and horn, plus a 1.4" compression driver on CD horn. It also has a passive crossover including a voltage-controlled circuit that protects the high frequency driver against overload. An integrated mid-range waveform system suppresses unwanted side lobes in the vertical acoustic axis. The loudspeaker is available with two different beam dispersion angles (90° x 50° or 60° x 50°) and offers a maximum sound pressure level of 140 dB, a frequency range of 52 Hz - 20 kHz and a load capacity of 900 W (nominal) / 3600 W (peak).
Weighing in at 39 kg, the PT-70's compact dimensions (400 x 850 x 450 mm) and carefully designed mounting bracket system makes it highly suitable for both flown applications and secure stand-alone tripod use. The speaker housing is built from steel brace reinforced multiplex birch plywood and coated with a scratch-resistant, polyurethane black finish (with other RAL colours also available on request).
(Jim Evans)
