diyhifisupply Crescendo Manuel - Sayfa 3

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1 Introduction and Overview

High Efficiency, friendly size, reasonable bandwidth and good

sound. SET friendly. Impossible dream?

Unfortunately horns with any bandwidth are the size of a

refrigerator. So...we have developed a horn ribbon based system

which achieves our goals. The wide band horn ribbon covers from

about 600hz to 23khz. The special carbon fiber reinforced paper

cone cast frame 8" Driver covers below that, using 1st order

(phase-coherent) crossovers.

The 600Hz Crossovers uses extreme

quality parts: all film caps, oil paper and

copper

foil

inductors,

Silver

Kiwame Resistors etc.

The Systems sensitivity is an honest

98db/w (100db in room as specified by

many speaker manufacturers), nomi-

nally 8 ohms. The box is 30L and covers

from about 60hz to 23khz in room. The

Crescendo can be used with many

commercial Subwoofers to extend the

low frequency response.

The -6dB coverage angle for the

Crescendo HF 50 degrees horizontal

and 30 degrees vertical. Such controlled dispersion over such a

wide frequency range ensures that even in acoustically difficult

rooms and the midrange and treble remain from excessive

reflections and room reverb.

diyhifisupply®

The Crescendo (Grande) Speaker System

Wire,

There is an option for bass modules – making the Crescendo into

the the Crescendo Grande System. We wanted a cabinet that

could slip under the Crescendos and take the place of the stand.

For this a really beefy, quick bass driver was needed, which

happens to be exactly what the DynaFone is. The cabinet is about

50L and tuned to cover down to 25hz flat.

Also needed was lots of power to drive the bass modules. We use

some high quality plate Amplifiers which give us about 250w in a

small footprint integrated into

the

woofer

cabinet.

This

bass system has no problem

keeping up with the Cres-

cendo horn ribbons while at

the same time giving up

really

clean

earthquake

tones in our 170m

shop.

How does it sound? The

dynamics from this combo

are pretty scary at times.

Since the ribbon is horn

loaded, wideband and closed

on the back (doesn't need

nor use the box) it gives

Electrostatic levels of trans-

parency and immediacy, and

the coherence of a full-range

driver.