Reckhorn A-405 User Manual [ml]
Betriebsanleitung
R CKHORN
A-405
user manual
Mode d’emploi
www.reckhorn.com
Subwoofer amplifier with parametric crossover and room equalization
Subwooferverstärker mit parametrischer Weiche und Raumanpassung
Amplificateur de subwoofer avec filtre paramétrique et égalisation de salle
Subwoofer versterker voorzien van parametrisch filter en ruimte instelling
A-405A-405
I
Aanleiding
7575
1515 7575
.
8585
1717
..
1010 5050
3030 4 00400
AC supply 230 V / 50 Hz or 110 V / 60 Hz according to back side printing, protection circuits against overheat and shortcut with
speaker relay / breaker / Stromversorgung 230 V / 50 Hz oder 110 V / 60 Hz gemäß Aufdruck auf der Geräterückseite, Schutzschaltungen gegen Überhitzung und Kurzschluss durch Lautsprecherrelais / Alimentation 230 V / 50 Hz ou 110 V / 60 Hz selon
spécifications au dos de l'appareil, circuits de protection contre la surchauffe et court-circuit grâce aux relais des haut-parleurs
Voeding 230 V / 50 Hz of 110 V / 60 Hz zie hiervoor achterzijde versterker.
damping factor at 8 ohms/ Dämpfungsfaktor an 8 Ohm / Facteur d'amortissement sous 8 Ohm / Dempingsfactor bij 8 ohm 250
output power at distortion level 0.02 % / Ausgangsleistung bei Verzerrung 0,02 % 180 watts / 8 ohms
Puissance de sortie avec distorsion 0,02 % / Uitgangsvermogen bij een vervorming van 0,02% 290 watts / 4 ohms
420 watts / 2 ohms
frequency response subwoofer / Frequenzgang Subwoofer 10 - 400 Hz / -1dB
Réponse en fréquence subwoofer / Frequentiebereik subwoofer
frequency response satellite output / Frequenzgang Satellitenausgang 30 - 40000 Hz -1 dB
Réponse en fréquence sortie satellite / Frequentiebereik van satellieten uitgang
S-N ratio / Störabstand / rapport signal-bruit / signaal-ruis verhouding over 95 dB
RCA low input sensitivity / Eingangsempfindlichkeit / sensibilité d'entrée / ingangsgevoeligheid 0.3 volts / 10 k ohms
speaker high input sensitivity / Eingangsempfindlichkeit bei Lautsprecheransteuerung / 1.2 volts
Sensibilité d'entrée au niveau des haut-parleurs / Inganggevoeligheid via luidspreker ingang
high cut / Tiefpass / filtre passe-bas / Hoogfilter 40 - 300 Hz / 24 dB
boost level / Bassanhebung / accentuation des graves / Basversterking 0 to +7,5dB
boost frequency / Bassanhebung Frequenz / accentuation des graves fréquences / Frequentie van de basversterking 15 - 55 Hz
equalizer decrease variable / Bassanhebung variabel / Accentuation variable des graves / Variabele basversterking 0 to -7.5 dB
equalizer decrease frequency variable / Bassanhebung Einsatzfrequenz variabel 17 - 85 Hz
Accentuation des graves avec fréquence variable / Basversterking bij variabele frequentie
subsonic 24dB / Subsonic 24dB / subsonique 24 dB / Subsonisch 24 dB 10 - 50 Hz / 24 dB
phase shift variable Phasendrehung variabel / Rotation de phase variable / Fase verschuiving variabel 0 - 270°
satellite high pass variable / Satelliten Hochpass variabel 30 - 400 Hz / 24 dB
Filtre passe-haut variable des satellites / Satellieten hoogdoorlaat filter
satellite output signal / Ausgangssignal Satelliten / Signal de sortie des satellites / Uitgangssignaal satellieten -2 dB / 47 k ohms
max. power consumption / Maximale Leistungsaufname / Puissance absorbée max. / Maximale stroomverbruik 700 watts
width x height x depth / Breite x Höhe x Tiefe / largeur x hauteur x poids / Breedte x hoogte x diepte 425 x 100 x 240 mm
weight / Gewicht / poids / Gewicht 8 kg
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Subwoofer combinations
All passive subwoofers with minimum impedance of 2 ohms can be driven. The A-405 has
exeptionally strong deep bass power and must be adjusted to the power rating of the subwoofer.
Subwoofer connection with these steps
1. POWER at OFF, all knobs far left, HIGH CUT far right
2. LOW INPUT connect as sketches A to G. B is useful if the Subwoofer input
signal is too low. C is requested if SAT OUT = Satellite output signal is needed. At F and
G the level is only adjustable at A-405.
H and J show the connection to a separate amplifier for satellite speakers.
Audio/Video Receiver
LFE-MONO OUT
R
LOW INPUT
A-405
F
Stereoamplifier
TAPE REC
L R
B
Audio/Video Receiver
LFE-MONO OUT
L R
LOW INPUT
A-405
Taperecorder / CD
OUTPUT
L R
G
CA
Audio/Video Receiver
PRE OUT FRONT
L R
L R
LOW INPUT
A-405
L R
H
A-404
SAT OUT
D E
Stereoamplifier
PRE OUT
L R
L R
LOW INPUT
A-405
Preamplifier
OUTPUT
L R
L R
LOW INPUT
A-405
J
A-404
SAT OUT
L R
L R
LOW INPUT
A-405
L R
LOW INPUT
A-405
L R
Stereoamplifier
MAIN IN or AUX
L R
Poweramplifier
INPUT
3. If RCA connection is not possible connect as sketch K.
4. SUBWOOFER OUTPUT connect to subwoofer speaker as sketches L = total impedance
2 - 8 ohms, M = total impedance 2 - 4 ohms, N = total impedance = 4 - 8 ohms. The amplifier
delivers the highest power at 2 ohms. The sound and overload safety are the best at 8 ohms.
K L M
Stereo amplifier speaker output
LEFT
+
+
-
-
-
A-405 HIGH INPUT
RIGHT A-405
-
-
-
SUBWOOFER OUTPUT
+
+
-
-
2 - 8Ω
++
SUBWOOFER OUTPUT
+
+
A-405
-
-
4 - 8Ω
-
4 - 8Ω
SUBWOOFER OUTPUT
+
+
-
-
2 - 4Ω
+
N
A-405
+
-
2 - 4Ω
+
+
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5. If the voltage printed at the back side (110 V or 230 V) is equivalent to your house voltage
connect AC INPUT with your house AC with the attached cable. Due to the high switch-on
power at least a 230V/10 amp (110V/20 amp) house fuse is needed.
6. Play your main amplifier at low level music with deep bass
7. POWER at On and LEVEL turn right until you hear sound from your subwoofer
8. At medium loudness adjust all knobs as shown below. The numbers are related to clocklike setting,
examples: 7 = 7 o'clock = far left, 12 = 12 o'clock = upright, 5 = 5 o'clock = far right
9. POWER OFF: amplifier is totally off = no electric power wasted
10. POWER ON: amplifier on = steady electric consumption 10 watts
11. PROTECT LED: lights up at faulty operation as too low speaker impedance / short cut,
overload, overheat
12. CLIPPING LED: a short light up indicates that overload starts but it is still tolerable at
very short bass impulses. At stronger light up reduce LEVEL. At speaker shortcut, too low
impedance and overload the relay cuts the speaker and the LED steady on. After about
every 10 seconds the circuit tests if the shortcut, low impedance or overload has been relieved.
13. LEVEL SUB: 7=no sound, 5=maximum input sensitivity
14. HIGH CUT cuts frequencies above 7=40Hz, 8=58Hz, 9=80Hz, 10=110Hz, 11= 150Hz,
12=180Hz, 1=200Hz, 3=240Hz, 4=260Hz, 5=300Hz
15. BOOST LEVEL: increases the level at 7=0dB, 8=1.2dB; 9=2.4dB, 10=3.6dB, 11=4dB,
12=5 dB, 1=6dB, 2=6.3dB, 3=6.5dB, 4=7dB, 5=7.5dB
16. BOOST FREQUENCY: sets the BOOST frequency at 7=15Hz, 8=18Hz, 9=20Hz, 10=30Hz,
11=35Hz, 12=40Hz, 1=45Hz, 2=47Hz, 3=50Hz, 4=53Hz, 5=55Hz
17. EQUALIZER LEVEL: reduces the level at the frequency set by EQUALIZER ,FREQUENCY at 7 = 0dB,
8 =1.2 dB, 9 =2.4 dB, 10 = 3.6 dB, 11 = 4 dB, 12 =5 dB, 1=6 dB, 2 =6.3 dB, 3 = 6.5 dB, 4 = 7 dB, 5 = 7.5 dB
18. EQUALIZER FREQUENCY: adjusts the narrow bandwith decrease at 7=17 Hz, 8=25Hz, 9=35Hz, 10=40Hz,
11=50Hz, 12=60Hz, 1=65Hz, 2=70Hz, 3=75Hz, 4=80Hz, 5=85Hz
19. SUBSONIC: filters unwanted lowest frequencies below 7=10Hz, 8=13Hz, 9=16Hz, 10=22Hz, 11=26Hz,
12=30Hz, 1=34Hz, 2=39Hz, 3=43Hz, 4=47Hz, 5=50Hz
20. PHASE: adjusts the subwoofer for same acoustical phase as the front speaker at the preferred listening
spot. Listening test for best mix of front speaker and subwoofer is essential.
21. SAT OUT: limits the lowest frequency of the satellite speakers at 7=30Hz, 8=36Hz, 9=60Hz, 10=97Hz,
11=126Hz, 12=150Hz, 1=200Hz, 2=280Hz, 3=310Hz, 4=357Hz, 5=400Hz.
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