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BLOCK DIAGRAM
2nd dual
cascode
amp stage
Ist cascode
amp stage
Input
Stage Dual
ASO
Protection
r
Class A amp stage
eh
a53
a2
i (+) Speaker Drive Terminal
(+) SENSOR Output Terminal
J
|
(—} SENSOR Output Terminal
{=} Speaker Drive Terminal
INPUT
A Class Remote Contro!
Remote Switch a
External =a
Connectors
Transtormer
|
£
'
|
|
|
i
s e
b
|
aud)
aa]
Goes
ite
AClass
|
Dp
Power Relay
Ripple Filter
|
©
|
a
B Class Power Relay
Z
g 2 3 =
| | |
— —
ae
A Class Power Supply
* B Class
__ Powe: |
Supply
|
Relay Timing Circuit
DC Protection Circuit
LED ectivating Circuit
B eo
|
|
|
|
eae ees
THE © DRIVE SYSTEM
The speaker cord and output relay are included in
the sensor circuit which starts at the speaker enclosure
terminals in the © drive system as shown in Fig. 4. It is
a new
approach
to control speaker cone vibrations,
which
it achieves ideally to improve sound quality by
preventing distortion.
Performance data obtained through test measure-
ments as shown in Fig. 5 and 6 show improved sound
reproduction
heretofore
unattainable
with
even
the
highest quality circuits. Thus, superior sound is assured
with
& drive, and
confirmed
by these
performance
data.
INPUT
Speaker Cable
vs
Speaker
Hild
Vv
Fig. 4 Principle of © Drive
0.7
0.6, -
osb-
S 04
~
9.3
6
G2
<q
ol
bf ~
0.35
.
O-0.7
-08
0.9F
"48
{
10
(90
tk
10k
FREQUENCY
[Hz]
SE
eo
a
3
=
e
_ Conventional
<2)
Amplifier
a
rs)
S
0.01
fe)
Y Drive Arqpiitier
7
™ Mounted $ peakers
<
__& Drive Arnplitier
7 9.001
Mounted 3 esistors
<
a
je)
—
6.0001
10
FREQUENCY
[Hz]
All measurements were made at the speaker end of 10 m
length cables
Distortion is 1/10 to 1/200th for £ drive as compared to conventionalcirive
throughout the jow to high frequency range.
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