APART Champ-4 User manual

MANUAL
Champ - 4
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2Caution: hot and sharp surfaces ! This professional device needs to be installed by
TXDOL¿HGSHUVRQQHORQO\Please check the carton box for any kind of damage on reception of the goods. In case of adamaged carton, please contact your dealer before opening the carton.
!!!! Danger !!!! Exposure to extremely high noise levels may cause a permanent hearingloss. Individuals vary considerably to noise induced hearing loss but nearly everyone will lose
VRPHKHDULQJLIH[SRVHGWRVXI¿FLHQWO\LQWHQVHQRLVHIRUDVXI¿FLHQWDPRXQWRIWLPH7KHUHIRUHit is recommended that all persons exposed to equipment capable of producing high sound
SUHVVXUHOHYHOVVXFKDVWKLVDPSOL¿HUEHSURWHFWHGE\KHDULQJSURWHFWLRQZKLOHLQVWDOOLQJRUoperating this unit.
5HDGDOOGRFXPHQWDWLRQEHIRUHRSHUDWLQJ\RXUHTXLSPHQWKeep all documentation for future reference.Save the carton and packing material even if the equipment has arrived in good condition.Should you ever need to ship the unit, use only the original factory packing.Do not spill water or other liquids into or on the unit.Make sure power outlets conform to the power requirements listed on the back of the unit.Do not use the unit if the electrical power cord is frayed or broken.Always operate the unit with the AC ground wire connected to the electrical system ground.+DYHJDLQFRQWUROVRQDPSOL¿HUVWXUQHGGRZQGXULQJSRZHUXSWRSUHYHQWVSHDNHUGDPDJHLIthere are high signal levels at the inputs.
'RQRWFRQQHFWWKHLQSXWVRXWSXWVRIDPSOL¿HUVRUFRQVROHVWRDQ\RWKHUYROWDJHVRXUFHVXFKDVDEDWWHU\PDLQVVRXUFHRUSRZHUVXSSO\UHJDUGOHVVRIZKHWKHUWKHDPSOL¿HURUFRQVROHLVturned on or off.
Power down & disconnect units from mains voltage before making connections.Do not use the unit near stoves, heat registers, radiators, or other heat producing devices.'RQRWRSHUDWHHTXLSPHQWRQDVXUIDFHRULQDQHQYLURQPHQWZKLFKPD\GLVWRUWWKHQRUPDOÀRZof air around the unit. If the unit is used in an extremely dusty or smoky environment, the unit
should be periodically “blown free” of dust.
Do not remove the cover. Removing the cover will expose you to potentially dangerous voltages.
Do not drive the inputs with a signal level higher than that required to drive equipment to fulloutput.
'RQRWUXQWKHRXWSXWRIDQ\DPSOL¿HUEDFNLQWRDQRWKHULQSXWDo not ground the red output terminal, never connect a red output terminal to another redoutput terminal.
,QFDVHRIPDOIXQFWLRQWKLVGHYLFHVKRXOGEHVHUYLFHGE\TXDOL¿HGVHUYLFHSHUVRQQHORQO\Safety First!

3
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6ZLWFKDEOHKLJKDQGORZSDVV¿OWHUVIRUHDV\DQGWURXEOHIUHHVXEZRRIHUVDWHOOLWHDSSOLFDWLRQV,QWHJUDWHG$3&OLPLWHUFLUFXLWU\DQGFOLSLQGLFDWLRQ7KLVLQWHOOLJHQWFLUFXLWZLOOSUHYHQWKDUVKdistortion caused by clipping, provided that the input signal itself is not distorted of course…
what goes in, comes out.
%ULGJHDEOHSRZHUDPSOL¿HUVGRXEOHWKHRXWSXWSRZHUE\XQLWLQJWKHSRZHURIDPSOL¿HUVMinimum load impedance in bridge mode is 8 ohms.
6HOIVXSSRUWLQJORZUHVRQDQFHIUDPH7RUVLRQIUHHIURQWDQGVLGHSDQHOFRQVWUXFWLRQZLWKintegrated heatsink assembly.
6ROLGDOXPLQXPEUXVKHGIURQWSDQHOZLWKUHPRYDEOH´EUDFNHWVDQGKDQGOHVIRUXVHLQDUDFNQRDGGLWLRQDOVXSSRUWQHHGHG:LWKRXWWKH´EUDFNHWVLWZLOOEHDVWDQGDORQHXQLWLQhigh quality audio systems.
High power toroidal transformer.Low impedance power supply for improved dynamic response.Solid speaker binding posts.4 sets of banana screw plugs included.Manual contents
1. Features
2. Inputs and outputs
3. Rack mounting and wiring
4. standalone use
7HFKQLFDOVSHFL¿FDWLRQV1. Features

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4
2. Inputs and outputs
9ROXPHSRWPHWHUFKDQQHOXVHWKLVSRWPHWHUWRSUHVHWWKHYROXPH,QFDVHWKHDPSOL¿HUKDVEHHQVZLWFKHGto bridge mode, this potmeter sets the level for bridge operation.
6LJQDOOHGFKDQQHOWKLVOHGOLJKWVXSJUHHQZKHQDVXI¿FLHQWO\VWURQJVLJQDOLVSUHVHQWRQWKH¿UVWFKDQQHOafter passing the input level control. At startup, the led will light up red during a few seconds, this is perfectly
QRUPDO:KHQLWOLJKWVXSUHGGXULQJXVHWKHSRZHUWUDQVIRUPHURUSRZHUDPSOL¿HULVRYHUKHDWHGRULQSURWHFWPRGHDQGLVVKXWGRZQ7XUQRIIWKHSRZHU7KHDPSOL¿HUZLOOQRWWXUQRQDXWRPDWLFDOO\DIWHUPRVWHUURUFRQGLWLRQV,QVRPHFDVHVWKHXVHU0867WXUQRIISRZHUUHPRYHWKHRYHUORDGRUOHWLWFRROGRZQDQGWKHQSRZHURQDJDLQ$3&DFWLYLW\OHGFKDQQHOWKLVOHGOLJKWVXSZKHQWKH$3&FLUFXLWU\LVDFWLYH7KH$3&FLUFXLWU\UHGXFHVWKHJDLQDWWKHLQSXWVWRJXDUDQWHHWKHIXOOG\QDPLFUDQJHRIWKHSRZHUDPSOL¿HUFLUFXLWVZLWKRXWDOORZLQJDQ\harsh distortion.
&OLSOHGFKDQQHOWKLVOHGOLJKWVXSZKHQHYHUWKHDPSOL¿HUFOLSV7KLVLVDZDUQLQJVLJQ\RXDUHSXVKLQJthings a little too far or you are overloading the amp. Reduce the input level by a few dB so that this led never
lights up anymore !
%ULGJHOHGWKLVOHGOLJKWVXSWRLQGLFDWHWKDWWKHDPSOL¿HULVLQEULGJHPRGH6LJQDOOHGFKDQQHOWKLVOHGOLJKWVXSJUHHQZKHQDVXI¿FLHQWO\VWURQJVLJQDOLVSUHVHQWRQWKHOHIWFKDQQHOafter passing the input level control. At startup, the led will light up red during a few seconds, this is perfectly
QRUPDO:KHQLWOLJKWVXSUHGGXULQJXVHWKHSRZHUWUDQVIRUPHURUSRZHUDPSOL¿HULVRYHUKHDWHGRULQSURWHFWPRGHDQGLVVKXWGRZQ7XUQRIIWKHSRZHU7KHDPSOL¿HUZLOOQRWWXUQRQDXWRPDWLFDOO\DIWHUPRVWHUURUFRQGLWLRQV,QVRPHFDVHVWKHXVHU0867WXUQRIISRZHUUHPRYHWKHRYHUORDGRUOHWLWFRROGRZQDQGWKHQSRZHURQDJDLQ$3&DFWLYLW\OHGFKDQQHOWKLVOHGOLJKWVXSZKHQWKH$3&FLUFXLWU\LVDFWLYH7KH$3&FLUFXLWU\UHGXFHVWKHJDLQDWWKHLQSXWVWRJXDUDQWHHWKHIXOOG\QDPLFUDQJHRIWKHSRZHUDPSOL¿HUFLUFXLWV&OLSOHGFKDQQHOWKLVOHGOLJKWVXSZKHQHYHUWKHDPSOL¿HUFOLSV7KLVLVDZDUQLQJVLJQ\RXDUHSXVKLQJthings a little too far or you are overloading the amp. Reduce the input level by a few dB so that this led never
lights up anymore ! Don’t ignore this !
9ROXPHSRWPHWHUFKDQQHOXVHWKLVSRWPHWHUWRSUHVHWWKHYROXPH,QEULGJHPRGHWKLVSRWPHWHUKDVQRfunction.
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2 3 4 5 12 13 14 15

5
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9ROXPHSRWPHWHUFKDQQHOXVHWKLVSRWPHWHUWRSUHVHWWKHYROXPH,QFDVHWKHDPSOL¿HUKDVEHHQVZLWFKHGto bridge mode, this potmeter sets the level for bridge operation.
6LJQDOOHGFKDQQHOWKLVOHGOLJKWVXSJUHHQZKHQDVXI¿FLHQWO\VWURQJVLJQDOLVSUHVHQWRQWKH¿UVWFKDQQHOafter passing the input level control. At startup, the led will light up red during a few seconds, this is perfectly
QRUPDO:KHQLWOLJKWVXSUHGGXULQJXVHWKHSRZHUWUDQVIRUPHURUSRZHUDPSOL¿HULVRYHUKHDWHGRULQSURWHFWPRGHDQGLVVKXWGRZQ7XUQRIIWKHSRZHU7KHDPSOL¿HUZLOOQRWWXUQRQDXWRPDWLFDOO\DIWHUPRVWHUURUFRQGLWLRQV,QVRPHFDVHVWKHXVHU0867WXUQRIISRZHUDQGUHPRYHWKHRYHUORDGDQGWKHQSRZHURQDJDLQ$3&DFWLYLW\OHGFKDQQHOWKLVOHGOLJKWVXSZKHQWKH$3&FLUFXLWU\LVDFWLYH7KH$3&FLUFXLWU\UHGXFHVWKHJDLQDWWKHLQSXWVWRJXDUDQWHHWKHIXOOG\QDPLFUDQJHRIWKHSRZHUDPSOL¿HUFLUFXLWV&OLSOHGFKDQQHOWKLVOHGOLJKWVXSZKHQHYHUWKHDPSOL¿HUFOLSV7KLVLVDZDUQLQJVLJQ\RXDUHSXVKLQJthings a little too far or you are overloading the amp. Reduce the input level by a few dB so that this led
never lights up anymore ! Don’t ignore this !
%ULGJHOHGWKLVOHGOLJKWVXSWRLQGLFDWHWKDWWKHDPSOL¿HULVLQEULGJHPRGH6LJQDOOHGFKDQQHOWKLVOHGOLJKWVXSJUHHQZKHQDVXI¿FLHQWO\VWURQJVLJQDOLVSUHVHQWRQWKHOHIWFKDQQHOafter passing the input level control. At startup, the led will light up red during a few seconds, this is perfectly
QRUPDO:KHQLWOLJKWVXSUHGGXULQJXVHWKHSRZHUWUDQVIRUPHURUSRZHUDPSOL¿HULVRYHUKHDWHGRULQSURWHFWPRGHDQGLVVKXWGRZQ7XUQRIIWKHSRZHU7KHDPSOL¿HUZLOOQRWWXUQRQDXWRPDWLFDOO\DIWHUPRVWHUURUFRQGLWLRQV,QVRPHFDVHVWKHXVHU0867WXUQRIISRZHUDQGUHPRYHWKHRYHUORDGDQGWKHQSRZHURQDJDLQ$3&DFWLYLW\OHGFKDQQHOWKLVOHGOLJKWVXSZKHQWKH$3&FLUFXLWU\LVDFWLYH7KH$3&FLUFXLWU\UHGXFHVWKHJDLQDWWKHLQSXWVWRJXDUDQWHHWKHIXOOG\QDPLFUDQJHRIWKHSRZHUDPSOL¿HUFLUFXLWV&OLSOHGFKDQQHOWKLVOHGOLJKWVXSZKHQHYHUWKHDPSOL¿HUFOLSV7KLVLVDZDUQLQJVLJQ\RXDUHSXVKLQJthings a little too far or you are overloading the amp. Reduce the input level by a few dB so that this led
never lights up anymore ! Don’t ignore this !
9ROXPHSRWPHWHUFKDQQHOXVHWKLVSRWPHWHUWRSUHVHWWKHYROXPH,QEULGJHPRGHWKLVSRWPHWHUKDVQRfunction.
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6&KDQQHOXQEDODQFHGLQSXWRQFLQFKFRQQHFWRUVXVHWKHWRSRUERWWRPFLQFKFRQQHFWRUWRDSSO\DQXQEDODQFHGVLJQDORQFKDQQHO7KHVHFRQQHFWRUVDUHZLUHGLQSDUDOOHOWKLVPHDQV\RXFDQXVHWKHVHFRQGconnector as a signal link connector.
&KDQQHOXQEDODQFHGLQSXWRQFLQFKFRQQHFWRUVXVHWKHWRSRUERWWRPFLQFKFRQQHFWRUWRDSSO\DQXQEDODQFHGVLJQDORQFKDQQHO7KHVHFRQQHFWRUVDUHZLUHGLQSDUDOOHOWKLVPHDQV\RXFDQXVHWKHVHFRQGconnector as a signal link connector. In case of bridge operation of channel 3 and 4, use this connector and
leave channel 4 input unused.
0RGHVZLWFKHQDEOHVWRVZLWFKWRQRUPDOFKDQQHOVWHUHRRSHUDWLRQFKDQQHOVPL[HGDQGHDFKSOD\LQJthis mono mix, or single channel bridge mode. In case of bridge mode, only the channel 3 volume control is
XVHG7KLVLVLQGLFDWHGE\WKHEULGJHOHGRQWKHIURQWSDQHO*URXQGOLIWVZLWFKXVHWKLVVZLWFKWROLIWRUFRQQHFWDXGLRJURXQGWRVDIHW\JURXQG7KLVFDQEHXVHIXOOLQFDVHof hum.
7RSVZLWFKZKHQSXVKHGLQDQDFWLYHKLJKSDVV¿OWHUDW+]G%RFWDYHLVDSSOLHGWRFKDQQHOVDQGwhen not pushed in, channels 3 and 4 operate as full range channels.
&KDQQHOVSHDNHUELQGLQJSRVWWKLVFRQQHFWRUDFFHSWVVSHDNHUFDEOHDVZHOODVPPEDQDQDSOXJVRemove the protective cover from the middle of the red/black binding post in case you want to use banana
plugs.)RUEULGJHPRGHDSSOLFDWLRQV\RX0867XVHWKHUHGELQGLQJSRVWVRQO\FKDQQHOUHGSOXJLVEULGJHPRGHQHJDWLYHVSHDNHUFRQQHFWRU&KDQQHOVSHDNHUELQGLQJSRVWWKLVFRQQHFWRUDFFHSWVVSHDNHUFDEOHDVZHOODVPPEDQDQDSOXJVRemove the protective cover from the middle of the red/black binding post in case you want to use banana
plugs. )RUEULGJHPRGHDSSOLFDWLRQV\RX0867XVHWKHUHGELQGLQJSRVWVRQO\FKDQQHOUHGSOXJLVEULGJHPRGHSRVLWLYHVSHDNHUFRQQHFWRU0DLQVFDEOHFRQQHFWRUSOXJWKHPDLQVFDEOHFRQQHFWRUKHUHWKLVVRFNHWDOVRFRQWDLQVDPDLQVIXVHKROGHUReplace this fuse only with the type as indicated on the rear panel.
&KDQQHOVSHDNHUELQGLQJSRVWWKLVFRQQHFWRUDFFHSWVVSHDNHUFDEOHDVZHOODVPPEDQDQDSOXJVRemove the protective cover from the middle of the red/black binding post in case you want to use banana
plugs. )RUEULGJHPRGHDSSOLFDWLRQV\RX0867XVHWKHUHGELQGLQJSRVWVRQO\FKDQQHOUHGSOXJLVEULGJHPRGHQHJDWLYHVSHDNHUFRQQHFWRU5HDUSDQHOOD\RXW1 2 3 4 5 6 7 8 9 10 11 12 13 14

7
&KDQQHOVSHDNHUELQGLQJSRVWWKLVFRQQHFWRUDFFHSWVVSHDNHUFDEOHDVZHOODVPPEDQDQDSOXJVRemove the protective cover from the middle of the red/black binding post in case you want to use banana
plugs. )RUEULGJHPRGHDSSOLFDWLRQV\RX0867XVHWKHUHGELQGLQJSRVWVRQO\FKDQQHOUHGSOXJLVEULGJHPRGHSRVLWLYHVSHDNHUFRQQHFWRU:LWKWKLVVZLWFK\RXFDQDFLYDWHGHDFWLYDWHWKHLQWHJUDWHGVXEZRRIHU¿OWHUFLUFXLWU\6WDQGDUGFURVVRYHUIUHTXHQF\LVORZSDVVDW+]7KHSRVLWLRQPDUNHGµ$3¶KDVEHHQRSWLPL]HGIRUXVHZLWKRSWLRQDOO\DYDLODEOH$3DUWDXGLRSDVVLYHVXEZRRIHUV0RGHVZLWFKHQDEOHVWRVZLWFKWRQRUPDOFKDQQHOVWHUHRRSHUDWLRQFKDQQHOPL[HGPRQRRSHUDWLRQRUVLQJOHFKDQQHOEULGJHPRGH,QFDVHRIEULGJHPRGHRQO\WKHFKDQQHOYROXPHFRQWUROLVXVHG7KLVLVLQGLFDWHGby the bridge led on the front panel.
&KDQQHOXQEDODQFHGLQSXWRQFLQFKFRQQHFWRUVXVHWKHWRSRUERWWRPFLQFKFRQQHFWRUWRDSSO\DQXQEDODQFHGVLJQDORQFKDQQHO7KHVHFRQQHFWRUVDUHZLUHGLQSDUDOOHOWKLVPHDQV\RXFDQXVHWKHVHFRQGconnector as a signal link connector.
&KDQQHOXQEDODQFHGLQSXWRQFLQFKFRQQHFWRUVXVHWKHWRSRUERWWRPFLQFKFRQQHFWRUWRDSSO\DQXQEDODQFHGVLJQDORQFKDQQHO7KHVHFRQQHFWRUVDUHZLUHGLQSDUDOOHOWKLVPHDQV\RXFDQXVHWKHVHFRQGFRQQHFWRUDVDVLJQDOOLQNFRQQHFWRU,QFDVHRIEULGJHRSHUDWLRQRIFKDQQHODQGXVHWKLVFRQQHFWRUDQGOHDYHFKDQQHOLQSXWXQXVHGWhat is bridge mode ?
,QEULGJHPRGH\RXFDQXQLWHWKHSRZHURIVPDOODPSOL¿HUVLQWRJLDQWDPS7KHUHVXOWLQJSRZHUXVXDOO\LVPRUHWKDQGRXEOHWKHSRZHURIERWKDPSOL¿HUVXVHGindividually with the same load. There is a simple reason for this power boost:
because the speaker load is wired to the channel’s positive (hot) connectors, the
DPSOL¿HUVµIHHO¶KDOIRIWKHDFWXDOVSHDNHU¶VLPSHGDQFH7KLVPHDQVWKDWGHVSLWHthe fact that you connect for example an 8 ohm speaker, the amp thinks there is a 4
RKPORDGUHVXOWLQJLQKLJKHUSRZHURXWSXWSHUDPSOL¿HUDQGVLQFHERWKDPSOL¿HUVwork in bridge mode, this increased power is doubled. As a result, the minimum load
LPSHGDQFHLQEULGJHPRGHLVOLPLWHGWRRKPVEHFDXVHHYHU\DPSOL¿HURQO\µIHHOV¶half of this impedance. Set the speaker impedance selector of channel 1 to the 4-8
ohms position for 8 ohms(or higher) loads in bridge mode.

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8&KDPSFDQEHPRXQWHGLQD´UDFNWDNLQJXSRQO\UDFNVSDFH$OZD\VDOORZDJRRGDLUÀRZDURXQGWKHDPSOL¿HU¶VIURQWUHDUVLGHWRSDQGERWWRP:KHQLQVWDOOLQJLQDUDFNZLWKPXOWLSOHaudio devices, it is compulsory to leave one rack space between units. Fill the empty rack
VSDFHVZLWKPHVKHGEOLQGSDQHOVIRULPSURYHGYHQWLODWLRQ1HYHUPRXQWWKHDPSOL¿HULQDVHDOHGFDELQHWXQOHVVDGHTXDWHIRUFHGYHQWLODWLRQLVSURYLGHG7KHDPSOL¿HUPD\QRWEHDEOHWRPHHWWKHVSHFL¿FDWLRQVZKHQLQVWDOOHGLQDSRRUO\YHQWLODWHGHQYLURQPHQW6XSSRUWWKHXQLWDWWKHUHDUZKHQinstalling in a rack!
$OZD\VUHPHPEHUH[FHVVLYHKHDWLVRQHRI\RXUDPSOL¿HU¶VELJJHVWHQHPLHV3. Rack mounting and wiring
When wiring an audio rack, it is a good installation practice to route all AC wiring
along one side of the rack and all audio wiring along the other side to avoid coupling
mains cable interference into the audio path. Please use only high quality signal
and speaker cables and connectors. Pay special attention to avoiding ground loops
when installing audio devices in metal racks, use special insulating rack mounting
KDUGZDUHVXFKDVWKHVRFDOOHGµKXPIUHHV¶7KLVPRXQWLQJKDUGZDUHZLOOPDNHVXUHthat several devices mounted in a rack will be electrically isolated from the rack, and
thus are a great help in avoiding ground loops. Any damage caused by user induced
ground loops are not covered by warranty! Ground loops can cause hum or other
strange side effects that will affect stable and safe operation of audio hardware and
peripheral devices. Ground loops are often created by connecting tuners to cable
distribution sockets. Always use a RF isolating transformer whenever there is a cable
signal tuner or digital TV tuner in the audio path!

9
It is possible to integrate&KDPSin a high quality audio chain. In order to adapt the front panel
GLPHQVLRQVWRWKHGLPHQVLRQVRIRWKHUHTXLSPHQWLWLVSRVVLEOHWRUHPRYHWKH´EUDFNHWVDQGKDQGOHVIRUDQHYHQPRUHVOHHNDQGUH¿QHGORRNRemove the two screws marked in red circles and slide off the handles.
4. Stand alone use

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5. Technical specifications
Bridge-mono operation 8 ohm 130 W
4 channel mode 8 ohm 60 W / ch
4 channel mode 4 ohm 80 W / ch
Sine wave power, both channels driven (not recommended, for reference only)
7KLVDPSOL¿HULVGHVLJQHGIRUDQDXGLRSKLOHPXVLFH[SHULHQFHQRWIRUODEWHVWLQJ5$7('28738732:(5%27+&+$11(/6'5,9(1*(1(5$/7(&+1,&$/63(&,),&$7,216,QSXWLPSHGDQFHVHQVLWLYLW\XQEDODQFHG5&$ohm
10 KOhm / 1 V 0dBV
)UHTXHQF\UHVSRQVHG%20 Hz – 40 KHz
THD IMD Noise !G%$Gain 26 dB (32 dB in bridged mode)
Damping factor >100
Dynamics and level control $3&OLPLWHU3URWHFWLRQFLUFXLWV'&FOLSRYHUFXUUHQWVKRUWFLUFXLW$FWLYH¿OWHUFKDQQHODQGµ¶SRVLWLRQlowpass at 100Hz/12 dB/oct
$FWLYH¿OWHUFKDQQHODQGµ$3¶SRVLWLRQ$3DUWDXGLRVSHFL¿F¿OWHUFKDUDFWHULVWLFRSWLPL]HGIRU$3DUWDXGLRSDVVLYHVXEV$FWLYH¿OWHUFKDQQHOVDQGhighpass at 100Hz/12 dB/oct
7HPSHUDWXUHSURWHFWLRQ&FKWUDQVIRUPHU&&RROLQJconvectional, no fan
3RZHUFRQVXPSWLRQ9$LGOH9$IXOOSURJUDP0DLQVSRZHUUHTXLUHPHQWV9$&+]dynamics program power, all channels driven
bridge-mono operation 8 ohm 230 W
8 ohm / ch :4 channel mode 4 ohm :dynamics capacity at 2* ohm / single ch 180 W
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