Download Xm-224/Xm-124

Technische Informationen
Architects and engineers
specifications
X m -224/Xm -124
X-Amp Module
Description
Minimal System Requirements
1. X-OVER FREQUENCY fc2
The modules Xm-224 and Xm124 have been
designed as universal crossover/signal
processor modules for the X-Amp system.
Combined with X-series power amplifiers, they
are optimally suitable for use in active 2-way or
3-way applications. Using only two Xm-224
modules allows easy configuration of an active
stereo 2-way system. When in 3-way mode the
Xm-124 module is used for the SUB/LO-range,
it controls the sub-bass range. The fine-tuned
filter and EQ-functions are entirely realized in
the analog domain ensuring maximum
distortion-free reproduction and a superb
dynamic range. The Xm-224 module is simply
inserted into the frontal module slot "A" of any
two-channel X-Amp, like for example the
X1202. With only a few adjustments it takes
over control of the connected system
components, distributing the low-frequency
audio signal to the power amplifier output "A"
and the high-frequency signal to output "B".
Without using input "B", introducing the audio
has to be done via input "A". The crossover
frequency of the 4th order Linkwitz-Riley
crossover, the cutoff frequency of the Hi-Pass
filter, as well as the volume setting of both
channels can be set through precision controls
located on the front panel. It is possible to
internally activate the already integrated notchfilter and CD-Horn equalizer. Using the Xm-224
module with an X-Amp system provides the
possibility to realize high-quality and yet costeffective, active 2-way speaker configurations.
Furthermore, this goes hand in hand with the
drastic reduction of the entire system's
complexity, cabling, and resultant causes for
errors. The setting range of the Xm-224 module
allows optimal operation not only of 2-way but
also of 3-way set-ups. 3-way systems are
accomplished by simply using the Xm-124
subwoofer module inserted into the module slot
of the according LF-power amp, e.g. the X1201.
Separating the sub/low and mid channels is
achieved through the Hi-Pass filter in the Xm224 and the Lo-Pass filter in the Xm-124, which
form a 4th order Linkwitz-Riley crossover.
Frontal precision controls on the Xm-124
subwoofer module allow adjusting the cut-off
frequency of Lo-Pass filter, Lo-Cut filter, and
volume of the subwoofer channel. When
operating the Xm-124 module in a two-channel
power amplifier, the "MODE SELECTOR"switch on the module board is used to set the
amplifier sections A&B to parallel input
operation ("1in2Mode"). This uses only one
filter module for both channels. Each frontal
control can be separately protected against
unauthorized or inadvertent manipulation,
using optionally available protectors (control
covers, 16mm, 358 235).
The Xm-224 and Xm-124 modules have been
exclusively designed for being used in
DYNACORD X-Amp systems. The Xm-224
crossover module has to be installed in a twochannel power amplifier (e.g. X1202) while
employing the Xm-124 subwoofer module is
possible in single and two-channel power amps
(e.g. X1201 or X1202) as well, depending on
the application and the needed power.
Consequently, active stereo 2-way system
configurations need at least 2 Xm-224 modules
and 2 stereo X-Amp Series power amplifiers.
Active stereo 3-way systems employ two Xm124 modules for the subwoofers, where MID
and HI-channels are equipped with two Xm224 crossover modules each; i.e. a minimum
of three stereo power amplifiers, e.g. X1202
are necessary.
The crossover frequency between Hi and Lochannels - or in 3-way operation mode between
Hi and MID-channels - is adjusted using this
41-steps precision control. The control range is
70Hz to 3.2kHz with a slope of 24dB/oct. and
Linkwitz-Riley characteristics. The lowfrequency signal is automatically routed to the
power amplifier output A while the highfrequency signal is routed to output B. The
amount of steps of the control guarantee
maximum setting-precision and most of all
optimum adaptability to other modules in the
system.
Module Installation
When factory-shipped the module-slots of the
X-Amps are covered with blinds. For installing
the Xm-224 crossover module, first unplug the
power amplifier's mains cord, remove the
module slot A's blind cover, insert the crossover
module, and lock it in place. Please make sure
to correctly slide the module boards into the
according guiding rails to ensure accurate
contact and connection. The power amplifier is
now fully operational. For installing the Xm-124
module, please follow the same procedure.
Here, the audio signal can be fed via inputs A,
B, or - for summing the input signals in MonoBass applications - via both inputs. For different
possible system configurations, please also
refer to the setting-up examples in the
appendix.
2. Level A (LO/MID)
dB-scaled, 31-steps volume control for setting
the level of the power amplifier output A.
3. Level B (HI)
dB-scaled, 31-steps volume control for setting
the level of the power amplifier output B.
4. HIGH PASS FREQUENCY fc1
Depending on individual applications, this 41steps precision frequency control provides two
different functions. In 2-way system set-ups the
Hi-Pass filter is used as controllable LO-CUT
with a slope of 24dB/oct. in 3-way systems the
filter's high-pass edge is being used to
frequency-couple the subwoofer module Xm124. Setting the LO-PASS filter in the Xm-124
module and the Xm-224 module's HI-PASS
filter to identical cut-off frequencies,
automatically results in an additional LinkwitzRiley frequency crossover with a slope of
24dB/oct., providing optimal matching of the
LO/MID- to the subwoofer channel.
5. LOW PASS FREQUENCY fc2
41-steps precision frequency control. In 3-way
systems the filter's low-pass edge is being used
to frequency-couple the subwoofer module
Xm-124 to the Xm-224 module. Setting the
LO-PASS filter in the Xm-124 module and the
Xm-224 module's HI-PASS filter to identical
cut-off frequencies, automatically results in an
additional Linkwitz-Riley frequency crossover
with a slope of 24dB/oct., providing optimal
matching of the LO/MID- to the subwoofer
channel.
XM124 LowCut LCR
6. LO CUT FREQUENCY fc1
41-steps, controllable LO-Cut filter with a slope
of 24dB/oct.
7. Level SUB
dB-scaled, 31-steps SUB-volume control.
8. Mode Selector
This switch is only supported on the Xm-124
module. In "1in2 Mode" the MODE
SELECTOR-switch, which is located on the
insert-board allows to assign the processed
audio signal to both channels of a stereo power
amplifier.
XM124 X-Over LCR
XM224 LowCut LCR
9. Driver EQ
Setting the jumper J2 to ON activates the horn
driver EQ, which is a permanent-calibrated
notch filter compensating the often noticed
peaking in the frequency response of horn
drivers by attenuating the level by -3dB in the
range around 4 kHz.
10. CD Horn EQ
Operating a Constant Directivity Horn directly
connected to the power amplifier output often
makes additional equalization necessary.
Setting the jumper CD-HORN EQ to ON
activates a filter, which compensates for the
dropping level of the CD-Horn in the highfrequency range. The filter's cutoff-frequency
(Frequency Set) is determined by the foil-type
capacitor C26. Here, the -3dB drop in the horn
driver's level is the critical factor. Please, make
sure to mind the requirements stated by the
driver's manufacturer. Use the table on this
page to select the corresponding correct
capacitor value. Caution: when using passiveequalized cabinets, never activate the CD-Horn
EQ.
-3dB drop of the
horn driver
correction capacitor
C26 (F)
1.8 kHz
2.2 kHz
2.7 kHz
3.3 kHz
4.0 kHz
4.8 kHz
5.8 kHz
7.0 kHz
18n
15n
12n
10n
8n2
6n8
5n6
4n7
XM224 X-Over LCR
XM224 Driver EQ
Technical Specifications Xm-124
Module measured in Amplifier X1202, no load, level control in center position, unless otherwise
specified.
Note: 0dBu = 0.775V
Crossover
Function
Frequency Range, variable
Filter Type
Low Pass
20Hz ... 260Hz, 41-detent
24dB, Linkwitz-Riley
Lo-Cut
Function
Frequency Range, variable
Filter Type
Gain Range
Frequency Response, -3dB ref.100Hz, max. positions
S/N Ratio , note module in X1202 amplifier,
A-weighted
Dynamic Range,
measured at module output, A-weighted, +20dBu
THD+N
THD+N, typical, measured internal at module output
Level Control Attenuation
Supply Voltage
Supply Current
Dimensions, (WxHxD), mm
Weight
High Pass
10Hz ... 100Hz, 41-detent
24dB, Linkwitz-Riley
-∞ ... + 6dB, 31-detent
14 Hz ... 208 Hz
< 105dB
>116dB
< 0.05%
< 0.005%
> 85dB
+/-15Vdc
+/- 62 mA
120 x 43.6 x 142
178 g
Technical Specifications Xm-224
Module measured in Amplifier X1202, no load, level control in center position, unless otherwise specified.
Note: 0dBu = 0.775V
Crossover
Function
Frequency Range, variable
Filter Type
2-Way, LO(MID)/HI
70Hz ... 3200Hz, 41-detent
24dB, Linkwitz-Riley
HIGH-PASS
Function
Frequency Range, variable
Filter Type
LO-CUT or 3-Way SUB-HP Slope
20Hz ... 260Hz, 41-detent
24dB, Linkwitz-Riley
Equalization
CD HORN-EQ
HORN Driver-EQ, selectable
Gain Range
Low Channel Frequency Response, -3dB ref.100Hz
High Channel Frequency Response, -3dB ref.1kHz
S/N Ratio , note module in X1202 amplifier,
A-weighted
Dynamic Range,
measured at module output, A-weighted, +20dBu
THD+N
THD+N, typical, measured internal at module output
Level Control Attenuation
Supply Voltage
Supply Current
Dimensions, (WxHxD), mm
Weight
optional, SHELVING
4kHz, -3dB, Q=1, NOTCH
-∞ ... + 6dB, 31-detent
20Hz ... 2.56kHz
92Hz ... 91.2kHz
< 105dB
>116dB
< 0.05%
< 0.005%
> 85dB
+/-15Vdc
+/- 62 mA
120 x 43.6 x 142
193 g
GmbH • Hirschberger Ring 45 • 94315 Straubing •Telefon (09421) 706-0 •Telefax (09421) 706-265
Änderungen vorbehalten. Subject to change without prior notice.
Printed in Germany 17. 04. 2000 / 358 228
Internet: http:// www.dynacord.de