Switchmode Precision Series, Philosophy

SWITCHMODE PRECISION SERIES

ultra light weight power amplifiers

PHILOSOPHY

For decades, DYNACORD has been one of the leading manu- facturers in the pro audio sector and has established a com- manding position in the amplifier market thanks to the excellent audio performance, absolute reliability and high stability of the Linear Precision series.

SWITCHMODE TECHNOLOGY

The combination of an analogue class-Hdesign with a state-of-the-art switching power supply has made possible the creation of a professional power amplifier delivering up to 2 x 1500 watts into 4 ohms with excellent audio specifi- cations but weighing only 8.7 kg. Even complex loads as low as 2 ohms can be driven with absolute reliability. Amp racks containing several LX power amplifiers for active multi-way use are therefore easy to manipulate.

•Comprehensive set of protective circuits • High-efficiency class-H design • Switching power supply

• Extremely light and compact • Dynamic audio limiter • Highest reliability at 2 ohms

• 30% dynamic headroom • Constant gain with 32dB • Precise raster pots on the front panel

Class H

konventionell

CLASS - H TECHNOLOGY

With this technology, two different power supply rails are permanently available internally to the power amplifier blocks. For most of the program material, the lower operating voltage is able to reproduce the audio signal flawlessly; however, as soon as there are dynamic peaks, the amplifier switches internally and at high speed to the higher supply voltage. Since for long periods the power amplifier blocks are ope- rating with the lower supply voltage, there is considerably less power dissipation than with conventional class AB power amplifiers, which also means considerably less waste heat.

Output Power

Power Consumption Power Dissipation

THD = 1%

DYNAMIC LIMITERS

Dynamic limiters are general components in all DYNACORD power amplifiers. High- speed audio processors are continuously comparing the input signal to the output signal, and in the event of any non-linearity, the processors send control signals to the limiters, which operate dynamically upon the input level. As a result, the THD all the way up to 21 dBU is limited to an inaudible 1% max at the output.

21 dBu

LPN + LO-CUT

The retrofittable NRS 90268 kit, which is available as an option for all LX power ampli- fiers, combines the patented LPN (low-pass notch) filter with a low-cut filter. These eli- minate transient non-linearities in the low frequency range in small to medium-sized full- range speakers and thereby considerably extend the reproducible range at the bottom end. The acoustic result is bass reproduction with more punch and greater substance.