background image

Fig. 4:

The dotted line shows
frequency responses for a
soft Bass (S

OFT

) at varying

P

ROCESS

and a M

ID

-H

I

T

UNE

of 3.5 kHz.

The solid line shows the
phase responses, which
always drift only a few
degrees if the P

ROCESS

inten-

sity is increased.
The diagram shows very
clearly that the mid attenua-
tion gets stronger as the
P

ROCESS

value increases.

An improved harmonic struc-
ture results in a silky top-end
with far better separation
and intelligibility.

14

S T E R E O

S

TEREO

V

ITALIZER

alters the frequency spectrum in such a way that the

balance is maintained between all frequency ranges even at varying

monitor volumes. For the human ear, the sound is more pleasant and

easier to perceive than the original. In other words, increasing the P

ROCESS

value also increases the intensity of the M

ID

-H

I

T

UNE

filter and the B

ASS

filter, whilst dominant mid frequencies are damped by amplitude-

controlled phase shiftings. This improves the perception of loudness, clarity

and the bass punch, i.e. the strength and fullness of the audio signal.

The S

TEREO

V

ITALIZER

works with steep filters and controlled changes of

the phase relationships of the harmonics to process the harmonics struc-

ture.

We consciously did without the generator principle of »Exciters«. The

S

TEREO

V

ITALIZER

's harmonic filter does not add any distortions to the

original signal, unlike with the generator principle. It extracts all the infor-

mation it needs from the original signal. This significantly reduces the

hearing fatigue effect on the listener. By influencing the phase relationship

in an intelligent fashion, the harmonics which have been filtered out are

emphasized with increasing addition expressed as a percentage. The effect

significantly improves the speech intelligibility and the transparency. Old

archived recordings sound fresh and silky again. The brilliance of any audio

signal can be improved without it sounding sharp.

The H

ARMONICS

filter derives its input signal from the original signal and

the output of the M

ID

-H

I

T

UNE

filter. If you close the P

ROCESS

control

(extreme left), the B

ASS

and M

ID

-H

I

T

UNE

controls do not function any more.

You can then listen to the H

ARMONICS

control separately.

The second potentiometer level of the M

ID

-H

I

T

UNE

control is responsible

for the cut-off frequency of the H

ARMONICS

filter. A variation of the M

ID

-H

I

T

UNE

control alters the cut-off frequency (fundamental tone) of the harmo-

nics. Both filters complement each other in an ideal fashion as they each

always process the part of the audio signal which is not being processed by

the other filter. If the M

ID

-H

I

T

UNE

control is set at 20 kHz, the H

ARMONICS

Harmonics

6

Control elements

Содержание STEREO VITALIZER 9320

Страница 1: ...Owner s Manual SOUND PERFORMANCE LABORATORY STEREO Models 9319 9320...

Страница 2: ...ons of Liability In no event will SPL be liable for any damages including loss of data lost profits cost of cover or other special incidental consequential or indirect damages arising from the use of...

Страница 3: ...ssors currently available The STEREO VITALIZER is a first rate sound processor with exemplary performance excellent work manship and unrivalled sound quality Please study this owner s manual carefully...

Страница 4: ...w transparent and powerful almost every audio signal sounds after it has been processed with the STEREO VITALIZER The housing of the STEREO VITALIZER has the standard 19 EIA format and occupies 1 unit...

Страница 5: ...Two positions are available The LOW position indicates that the input sensitivity of the STEREO VITALIZER is low which means high level signals can be processed at this position Conversely the HIGH p...

Страница 6: ...rdings played through the same monitor system Do not connect the STEREO VITALIZER between master outputs and amplifier The major disadvantage of this connection is the varying input sensitivity with e...

Страница 7: ...to compen sate for deficiencies in the copying system It may also be necessary to modify the bass end as many high speed systems fail to reproduce the bass end of the spectrum faithfully In both areas...

Страница 8: ...oundtracks benefit in the ways already described for audio only applications and the fact that the STEREO VITALIZER is so quick to set up can save a lot of wasted time spent tuning multi band equalize...

Страница 9: ...to the right The bass sounds tight and dry Turn to the left The bass sounds soft and round You should perform these hearing tests on appropriate full range monitors because near field monitors normall...

Страница 10: ...e familiar disadvantages of this principle are as follows although odd harmonics do add to the brilli ance of the audio signal to a significant degree they tend to be somewhat sharp which leeds to hea...

Страница 11: ...only light up briefly if at all It is essential to avoid the PEAK LEDs being lit up for any length of time If they do so reduce the input level or switch from LOW to HIGH on the rear of the unit The B...

Страница 12: ...a different bass structure than with a lower bass amplification combined with a higher PROCESS value Choosing the best solution is a matter of personal taste and also depends on the type of original s...

Страница 13: ...lower frequencies The further down you go the brighter the sound image becomes as an increasing number of frequencies are included in the process The MID HI TUNE control can also be used to tone down...

Страница 14: ...le of Exciters The STEREO VITALIZER s harmonic filter does not add any distortions to the original signal unlike with the generator principle It extracts all the infor mation it needs from the origina...

Страница 15: ...he integral power supply is designed to minimize induced hum and noise due to the non existence of an air gap On the XLR jack version 9320 the primary voltage may be selected between 230V 50Hz and 115...

Страница 16: ...uency range 15 Hz 22 kHz CMRR common mode rejection 85dBu at 100 Hz 76dBu at 1 kHz 65dBu at 15 kHz THD N total harmonic distortion noise 0 002 at 1 kHz 0 105 at 10kHz Signal to noise CCIR 468 Bypass 9...

Страница 17: ...ized SPL warranty repair facility in the country where purchased or to the SPL factory in Germany in the original packaging or a replacement supplied by SPL with all transportation costs and full insu...

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