Digital Voice Research Macsub 512 User manual

COMPACT ACTIVE SUBWOOFER
500 W RMS MOSFET POWER AMPLIFIER
ELECTRONIC STEREO CROSSOVER
AUDIO PROCESSOR
ELECTRONIC LIMITER
USER’S MANUAL
GB
CODEM MUSIC S.r.l. -Via Del Vallo, 110 - 61100 PESARO - ITALY
Tel. [phone]- Fax [phone]
hhttttpp::////wwwwww..ccooddeemmmmuussiicc..ccoomm--EE--mmaaiill::iinnffoo@@ccooddeemmmmuussiicc..ccoomm

DESCRIPTION
The MACSUB 512 is a very compact and innovative subwoofer that can ensure an
absolute sound quality in any use conditions.
It incorporates a powerful and reliable 500 Wrms power amplifier with MOS-FET technology
designed for making a dynamic and clear sound, along with a music quality without equal.
The dynamics of trasducer is maximized by the AUDIO SIGNAL PROCESSOR and the
ELECTRONIC LIMITER and it at the same time protected from signal peaks and
distorsion wich could compromise its lenght.
Thanks to the trasducers quality, the high technological content of its incorporated power
amplifier, the
MACSUB 512 meet the strict demand of PA system as bass frequency
reinforcement system.
On the top of the cabinet there is a top hat on which insert a standard stand for acoustic
speaker.
USE OF BALANCED INPUTS
MACSUB 512 inputs are BALANCED 3 poles XLR CANNON type.
Balanced connection is studied to have a better rejection against the noise that wires (if very
long) takes from external interferences.
Most of professional audio equipment have balanced outputs, you can use however non
balanced connection with mono JACK (or 3 poles CANNON with pin 3 connected to pin 1)
the MACSUB 512 will work normally, but it will be more sensitive to external interferences.
LINK outputs are paralleled with inputs, so they are balanced/sbalanced like the inputs.
XOVER outputs are always BALANCED type.
USE OF CROSSOVER AND
LINK / XOVER OUPUTS
Internal crossover can be utilized in STEREO mode; connecting the two inputs L - R and their
outputs, or in MONO mode; connecting only the R (MONO) input and its relative outputs (see
fig.1).
The crossover outputs can be LINK or XOVER types;
• LINK OUTPUT is nothing else that the paralleled input signal, it can be used to give the save
signal to another speaker system.
It can be used to have a reinforcement on bass frequency, the speaker system connected to
the LINK output will reproduce the full range of frequency. If the speaker system does not
can handle bass frequency or you hear dangerous distorsions, is preferred to use XOVER
output.
• XOVER OUTPUT allows to exclude from the output signal all bass frequency range (< 125 Hz).
It can be used to have the best sound clearness and an higher sound pressure in the
mid/high frequency. The sound system connected to the XOVER ouput will reproduce only the
mid/high frequency range (> 125 Hz).
To have an higher sound pressure in bass frequency, is preferred to use LINK output.
USE OF INPUTS LEVEL
Volume knob adjust the input level of the two inputs and control only the subwoofer level,
the volume of LINK and XOVER outputs are unchanged.
Is preferred to use this control to have the right compromise between the bass frequency
generated from subwoofer and the rest of sound system.
The sound level can vary, it depend of the type of sound systems and connections
(balanced/sbalanced - link/xover).
The internal electronic limiter will always protect the loudspeaker and the amplifier from
dangerous input signal levels.

DESCRIPTION OF REAR PANEL AND CONNECTIONS
1) Power supply 220/240 Vac 50/60 Hz
2) Power switch with lamp (0-1)
3) Protection fuse
4) Balanced line input LEFT
5) Balanced line output LEFT - LINK (without crossover cut)
6) Balanced line output LEFT - XOVER (with crossover cut)
7) Balanced line input RIGHT or MONO
8) Balanced line output RIGHT - LINK (without crossover cut)
9) Balanced line output RIGHT - XOVER (with crossover cut)
10) Input level adjutment (L+R)
NOTE: In case of internal amplifier over-
heating, the heat-protection turn off the
system, when the temperature return to
normal level, automatically the protection
turn on again the system.
If the input signal level is higher than +10
dB the electronic limiter lose his effect.
Input level higher than +10 dB can
damage the speaker system.
INPUT LINK OUT XOVER OUT
0
MAX
L
R
mono
MADE IN ITALY
PROCESSOR CONTROLLED
500 WRMS MOSFET AMPLIFIER
COMPRESSOR/LIMITER
125 Hz
INPUT LINK OUT XOVER OUT
125 Hz
MACSUB
LEVEL
125 Hz
BALANCED
IN / OUT
BALANCED
IN / OUT
AC-IN
220~240 Vac
50/60 Hz
POWER
ON/OFF
POWER CONSUMPTION: 780 W
FUSE: 8A /250 VAC
Serial n°
512
MAC 2
MAC 3
MAC 32
STEREO MODE: 1 SUBWOOFER + 2 ACTIVE SPEAKERS
MONO MODE: 1 SUBWOOFER + 1 ACTIVE SPEAKER for CHANNEL
CCoolllleeggaarreeaallll’’uusscciittaaLLIINNKKooppppuurreeXXOOVVEERRddeellccaannaalleeLL
L
MAC 2
MAC 3
MAC 32
L
R
RL
L
Connect to
RR ((MMOONNOO))
INPUT
Connect like
LLcchhaannnneell
CCoonnnneeccttttooLLIINNKKoorrXXOOVVEERROOUUTTooff
RR ((MMOONNOO))cchhaannnneell
Connect to LINK or XOVER OUT of
R (MONO) channel
MIXER
MIXER
MAC 2
MAC 3
MAC 32
R
MAC 2
MAC 3
MAC 32
R
INPUT LINK OUT XOVER OUT
0
MAX
L
R
mono
MADE IN ITALY
PROCESSOR CONTROLLED
500 WRMS MOSFET AMPLIFIER
COMPRESSOR/LIMITER
125 Hz
INPUT LINK OUT XOVER OUT
125 Hz
MACSUB
LEVEL
125 Hz
BALANCED
IN / OUT
BALANCED
IN / OUT
AC-IN
220~240 Vac
50/60 Hz
POWER
ON/OFF
POWER CONSUMPTION: 780 W
FUSE: 8A /250 VAC
Serial n°
512
INPUT LINK OUT XOVER OUT
0
MAX
L
R
mono
MADE IN ITALY
PROCESSOR CONTROLLED
500 WRMS MOSFET AMPLIFIER
COMPRESSOR/LIMITER
125 Hz
INPUT LINK OUT XOVER OUT
125 Hz
MACSUB
LEVEL
125 Hz
BALANCED
IN / OUT
BALANCED
IN / OUT
AC-IN
220~240 Vac
50/60 Hz
POWER
ON/OFF
POWER CONSUMPTION: 780 W
FUSE: 8A /250 VAC
Serial n°
512
Fig. 1
INPUT LINK OUT XOVER OUT
0
MAX
L
R
mono
MADE IN ITALY
PROCESSOR CONTROLLED
500 WRMS MOSFET AMPLIFIER
COMPRESSOR/LIMITER
125 Hz
INPUT LINK OUT XOVER OUT
125 Hz
MACSUB
LEVEL
125 Hz
BALANCED
IN / OUT
BALANCED
IN / OUT
AC-IN
220~240 Vac
50/60 Hz
POWER
ON/OFF
POWER CONSUMPTION: 780 W
FUSE: 8A /250 VAC
Serial n°
512
Pannello posteriore
4 5 6
7 8 9
10
1
3
2

TECHNICAL SPECIFICATION
TECHNICAL SPECIFICATION AMPLIFIER
Type Active subwoofer - bass reflex
TECHNICAL SPECIFICATION STEREO CROSSOVER
Cut frequency: 125 Hz - 24 dB/oct.
Type: Electronic - low noise - stereo
Inputs: Balanced - 2 x XLRF (stereo/mono)
Outputs: Balanced - 2 x XLRF Flat + 2 x XLRF Xover 125 Hz
Type: AB class mosfet with audio signal processor
Output power: 500 W R.M.S. / 4 Ohm
THD < 0,1 % a 1 Khz
Frequency response: 20 - 50.000 Hz
Sensibilità d’ingresso:
0 dB / -7 dB max
Input impedance: 10 KOhm
Loudspeaker type: 320 mm (12”) high efficiency
Sensitivity (1W/1m): 96 dB
Frequency response: 38 - 125 Hz
Protections
Electronic limiter on the input signal (max +10 db)
Protection fuse on power supply (1 x 8AF)
Double protection fuse on power amplifier (2 x 10AF)
Self-resetting thermal fuse on transformer and power amplifier
Dimensions : Cm 47,5 x 40 x 40 (H - L - W)
Weight: Kg. 26
5