The outputpower of an amplifier

Delivers i.e. Rated output- 600 W

Music signals look different...

600 W... to sinewaves. Power is not sufficient.

600 W What to do? Reduce gain ?

600 W No. Better buy a DYNACORD amplifier...

600 W And here is what you get:

600 W

780 W 30 % Headroom !

S 900 S 1200

2 Power Ranges S 900 = 2 x 450 W / 4 Ohm S 1200 = 2 x 600 W / 4 Ohm

Positioning

Features  Highly Competitive Pricing  Excellent Audio Performance  Full Protection Package

 Active balanced Inputs  Direkt-Outs (Loop)  Bridge Mode (with separate SPEAKON-Output)  Ground-Lift-Switch  2 Ohm operation possible

15 kg 16 kg

X The powersection as well as the transformer(s) of poweramps need reliable protection to prevent damage of the unit.

All DYNACORD and ELECTRO-VOICE Power-Amplifiers provide thermal control and dedicated protection of the heat-sinks as well as of the transformer(s).

DC at the output of amplifiers will blow the voicecoils of connected speakers !

All DYNACORD Power-Amplifiers provide reliable protection against DC at the output

X HF at the output of amplifiers will blow the voicecoils of connected speakers !

All DYNACORD Power-Amplifiers provide reliable protection against High Frequency at the output

Defective cables or defective speakers may cause short circuits at the poweramp‘s output(s)

All DYNACORD Power-Amplifiers provide reliable protection against damage due to short circuits at the output

No speakers connected ?

No Problem !

Connect any (i.e way) speaker cabinet to any power amplifier.

The cabinet with its crossover represents a reactive load to the amplifier and sends a (normally small) part of the energy back into the amp.

This phenomenon is called Electro Motive Force

In case that i.e. the crossover or a speaker is defective the BACK-EMF may become very high and can damage the power transistors of the amplifier

Audio Performance

The THD+N versus frequency test routine is used in order to determine the amount of Total Harmonic Distortion + Noise versus the frequency at rated output power.

This measurement gives information about the linearity of the power amp.

The IMD-SMPTE test routine is used in order to determine the amount of Distortion generated by the non-linear products of the test signal.

This measurement gives most critical information about the amplifiers linearity related to complex musical wave forms.

The DIM 30 test routine is used in order to determine the amount of DYNAMIC INTERMODULATION distortion using a composite square-sine-wave band limited to 30 kHz.

This measurement gives information about the amplifiers „speed“

Power Supply Rail of the amplifier

Example

Limiter Circuit detects distortion and controls gain

Distortion is now at threshold level (1%) or below

The dynamic limiting control process takes 3 ms, only

This measurement shows the response of the dynamic limiters

The limiters keep the signal within the 1% THD range as specified ZOOM

Same signal without dynamic limiters

One channel of the amplifier shown here.

INPUT Signal AMPLIFIER

The limiters get controlled by means of APC AUDIO PROCESSOR CONTROL

APC constantly monitors the input-signal...

... and the output-signal

APC monitors Input- versus Output-Signal...

... and -in case of nonlinear operating conditions- activates the limiter.

Monitors CURRENT versus POWER SUPPLY RAIL...

... activates the Peak Current Limiter and controls the audio limiter to prevent any clipping signal to be fed into the connected speakers.

TBC monitors ENERGY- versus TIME...

... thus simulates the thermal behaviour of the voicecoil...

... and controls the limiters accordingly. DC: P-1050 X + Xa/PM- Amps EV: P-1250 and Px-Amps only !

Linear Precision P-Series Procesed Precision Standard Precision Q-Series Xa-Series X-Amps DPA-Series