Shure SCM268 User manual

Model SCM268 User Guide
©2008 Shure Incorporated
27D8646 (Rev. 6)
Printed in U.S.A.
Four-channel Microphone Mixer
Mélangeur à quatre canaux
Mikrofonmischpult mit vier Kanälen
Mezclador de micrófonos de cuatro canales
Mixer microfonico a quattro canali
4 チャンネルマイクロホンミキサーです
1
2
3
4
AUX IN
OUTPUT
LEVEL
METER
MASTER
POWER
-10 0+6
+12
+18
-20
SCM268 microphone mixer

! IMPORTANT SAFETY INSTRUCTIONS !
1. READ these instructions.
2. KEEP these instructions.
3. HEED all warnings.
4. FOLLOW all instructions.
5. DO NOT use this apparatus near water.
6. CLEAN ONLY with dry cloth.
7. DO NOT block any ventilation openings. Install in accordance with the manu-
facturer's instructions.
8. DO NOT install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including amplifiers) that produce heat.
9. DO NOT defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wider blade or the third
prong are provided for your safety. If the provided plug does not fit into your out-
let, consult an electrician for replacement of the obsolete outlet.
10. PROTECT the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
11. ONLY USE attachments/accessories specified by the manufacturer.
12.
13. UNPLUG this apparatus during lightning storms or when unused for long periods of
time.
14. REFER all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is dam-
aged, liquid has been spilled or objects have fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does not operate normally, or has been
dropped.
15. DO NOT expose the apparatus to dripping and splashing. DO NOT put objects filled
with liquids, such as vases, on the apparatus.
16. The MAINS plug or an appliance coupler shall remain readily operable.
17. The airborne noise of the apparatus does not exceed 70dB (A).
18. Apparatus with CLASS I construction shall be connected to a MAINS socket outlet
with a protective earthing connection.
19. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or
moisture.
20. Do not attempt to modify this product. Doing so could result in personal injury
and/or product failure.
USE only with a cart, stand, tripod, bracket, or table
specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid
injury from tip-over.
This symbol indicates that dangerous voltage constituting a
risk of electric shock is present within this unit.
This symbol indicates that there are important operating and
maintenance instructions in the literature accompanying this unit.
WARNING: Voltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel. The
safety certifications do not apply when the operating voltage is changed from the factory setting.
! CONSIGNES DE SÉCURITÉ IMPORTANTES !
1. LIRE ces consignes.
2. CONSERVER ces consignes.
3. OBSERVER tous les avertissements.
4. SUIVRE toutes les consignes.
5. NE PAS utiliser cet appareil à proximité de l'eau.
6. NETTOYER UNIQUEMENT avec un chiffon sec.
7. NE PAS obstruer les ouvertures de ventilation. Installer en respectant les con-
signes du fabricant.
8. Ne pas installer à proximité d'une source de chaleur telle qu'un radiateur, une
bouche de chaleur, un poêle ou d'autres appareils (dont les amplificateurs) pro-
duisant de la chaleur.
9. NE PAS détériorer la sécurité de la fiche polarisée ou de la fiche de terre. Une
fiche polarisée comporte deux lames dont l'une est plus large que l'autre. Une
fiche de terre comporte deux lames et une troisième broche de mise à la terre.
La lame la plus large ou la troisième broche assure la sécurité de l'utilisateur. Si
la fiche fournie ne s'adapte pas à la prise électrique, demander à un électricien
de remplacer la prise hors normes.
10. PROTÉGER le cordon d'alimentation afin que personne ne marche dessus et
que rien ne le pince, en particulier au niveau des fiches, des prises de courant
et du point de sortie de l'appareil.
11. UTILISER UNIQUEMENT les accessoires spécifiés par le fabricant.
12.
13. DÉBRANCHER l'appareil pendant les orages ou quand il ne sera pas utilisé pendant
longtemps.
14. CONFIER toute réparation à du personnel qualifié. Des réparations sont nécessaires
si l'appareil est endommagé de quelque façon que ce soit, comme par exemple : cor-
don ou prise d'alimentation endommagé, liquide renversé ou objet tombé à l'intérieur
de l'appareil, exposition de l'appareil à la pluie ou à l'humidité, appareil qui ne marche
pas normalement ou que l'on a fait tomber.
15. NE PAS exposer cet appareil aux égouttures et aux éclaboussements. NE PAS poser
des objets contenant de l'eau, comme des vases, sur l'appareil.
16. La prise SECTEUR ou un adaptateur d'alimentation doit toujours rester prêt(e) à être
utilisé(e).
17. Le bruit aérien de l'appareil ne dépasse pas 70 dB (A).
18. L'appareil de construction de CLASSE I doit être raccordé à une prise SECTEUR
dotée d'une protection par mise à la terre.
19. Pour réduire les risques d'incendie ou de choc électrique, ne pas exposer cet
appareil à la pluie ou à l'humidité.
20. Ne pas essayer de modifier ce produit. Une telle opération est susceptible
d'entraîner des blessures ou la défaillance du produit.
UTILISER uniquement avec un chariot, un pied, un trépied,
un support ou une table spécifié par le fabricant ou vendu
avec l'appareil. Si un chariot est utilisé, déplacer l'ensemble
chariot-appareil avec précaution afin de ne pas le renverser,
ce qui pourrait entraîner des blessures.
Ce symbole indique la présence d'une tension dangereuse dans
l'appareil constituant un risque de choc électrique.
Ce symbole indique que la documentation fournie avec l'appareil contient
des instructions d'utilisation et d'entretien importantes.
AVERTISSEMENT : Les tensions à l'intérieur de cet équipement peuvent être mortelles. Aucune pièce interne réparable par l'utilisateur. Confier toute réparation à du per-
sonnel qualifié. Les certifications de sécurité sont invalidées lorsque le réglage de tension d'usine est changé.

! WICHTIGE SICHERHEITSHINWEISE !
1. Diese Hinweise LESEN.
2. Diese Hinweise AUFHEBEN.
3. Alle Warnhinweise BEACHTEN.
4. Alle Anweisungen BEFOLGEN.
5. Dieses Gerät NICHT in der Nähe von Wasser verwenden.
6. NUR mit einem sauberen Tuch REINIGEN.
7. KEINE Lüftungsöffnungen verdecken. Gemäß den Anweisungen des Herstell-
ers einbauen.
8. Nicht in der Nähe von Wärmequellen, wie Heizkörpern, Raumheizungen,
Herden oder anderen Geräten (einschließlich Verstärkern) installieren, die
Wärme erzeugen.
9. Die Schutzfunktion des Schukosteckers NICHT umgehen. Bei Steckern für die
USA gibt es polarisierte Stecker, bei denen ein Leiter breiter als der andere ist;
US-Stecker mit Erdung verfügen über einen dritten Schutzleiter. Bei diesen
Steckerausführungen dient der breitere Leiter bzw. der Schutzleiter Ihrer
Sicherheit. Wenn der mitgelieferte Stecker nicht in die Steckdose passt, einen
Elektriker mit dem Austauschen der veralteten Steckdose beauftragen.
10. VERHINDERN, dass das Netzkabel gequetscht oder darauf getreten wird, ins-
besondere im Bereich der Stecker, Netzsteckdosen und an der Austrittsstelle
vom Gerät.
11. NUR das vom Hersteller angegebene Zubehör und entsprechende
Zusatzgeräte verwenden.
12.
13. Das Netzkabel dieses Geräts während Gewittern oder bei längeren Stillstandszeiten
aus der Steckdose ABZIEHEN.
14. Alle Reparatur- und Wartungsarbeiten von qualifiziertem Kundendienstpersonal
DURCHFÜHREN LASSEN. Kundendienst ist erforderlich, wenn das Gerät auf
irgendwelche Weise beschädigt wurde, z.B. wenn das Netzkabel oder der
Netzstecker beschädigt wurden, wenn Flüssigkeiten in das Gerät verschüttet wurden
oder Fremdkörper hineinfielen, wenn das Gerät Regen oder Feuchtigkeit ausgesetzt
war, nicht normal funktioniert oder fallen gelassen wurde.
15. Dieses Gerät vor Tropf- und Spritzwasser SCHÜTZEN. KEINE mit Wasser gefüllten
Gegenstände wie zum Beispiel Vasen auf das Gerät STELLEN.
16. Der Netzstecker oder ein Gerätekuppler müssen leicht betriebsbereit bleiben.
17. Der Luftschall des Geräts überschreitet 70 dB (A) nicht.
18. Das Gerät mit Bauweise der KLASSE I muss mit einem Schukostecker mit Schutzle-
iter in eine Netzsteckdose mit Schutzleiter eingesteckt werden.
19. Dieses Gerät darf nicht Regen oder Feuchtigkeit ausgesetzt werden, um das
Risiko von Bränden oder Stromschlägen zu verringern.
20. Nicht versuchen, dieses Produkt zu modifizieren. Ansonsten könnte es zu Verlet-
zungen und/oder zum Produktausfall kommen.
NUR in Verbindung mit einem vom Hersteller angegebenen oder mit
dem Gerät verkauften Transportwagen, Stand, Stativ, Träger oder
Tisch verwenden. Wenn ein Transportwagen verwendet wird, beim
Verschieben der Transportwagen-Geräte Einheit vorsichtig vorgehen,
um Verletzungen durch Umkippen zu verhüten.
Dieses Symbol zeigt an, dass gefährliche Spannungswerte,
die ein Stromschlagrisiko darstellen, innerhalb dieses
Geräts auftreten
Dieses Symbol zeigt an, dass das diesem Gerät beiliegende
Handbuch wichtige Betriebs- und Wartungsanweisungen enthält.
ACHTUNG: Die in diesem Gerät auftretenden Spannungen sind lebensgefährlich. Das Gerät enthält keine Teile, die vom Benutzer gewartet
werden können. Alle Reparatur- und Wartungsarbeiten von qualifiziertem Kundendienstpersonal durchführen lassen. Die Sicherheitszulas-
sungen gelten nicht mehr, wenn die Werkseinstellung der Betriebsspannung geändert wird.
! INSTRUCCIONES IMPORTANTES DE SEGURIDAD !
1. LEA estas instrucciones.
2. CONSERVE estas instrucciones.
3. PRESTE ATENCION a todas las advertencias.
4. SIGA todas las instrucciones.
5. NO utilice este aparato cerca del agua.
6. LIMPIESE UNICAMENTE con un trapo seco.
7. NO obstruya ninguna de las aberturas de ventilación. Instálese según lo
indicado en las instrucciones del fabricante.
8. No instale el aparato cerca de fuentes de calor tales como radiadores, registros
de calefacción, estufas u otros aparatos (incluyendo amplificadores) que
produzcan calor.
9. NO anule la función de seguridad del enchufe polarizado o con clavija de
puesta a tierra. Un enchufe polarizado tiene dos patas, una más ancha que la
otra. Un enchufe con puesta a tierra tiene dos patas y una tercera clavija con
puesta a tierra. La pata más ancha o la tercera clavija se proporciona para su
seguridad. Si el tomacorriente no es del tipo apropiado para el enchufe, con-
sulte a un electricista para que sustituya el tomacorriente de estilo anticuado.
10. PROTEJA el cable eléctrico para evitar que personas lo pisen o estrujen, par-
ticularmente en sus enchufes, en los tomacorrientes y en el punto en el cual
sale del aparato.
11. UTILICE únicamente los accesorios especificados por el fabricante.
12.
13. DESENCHUFE el aparato durante las tormentas eléctricas, o si no va a ser utilizado
por un lapso prolongado.
14. TODA reparación debe ser llevada a cabo por técnicos calificados. El aparato
requiere reparación si ha sufrido cualquier tipo de daño, incluyendo los daños al
cordón o enchufe eléctrico, si se derrama líquido sobre el aparato o si caen objetos
en su interior, si ha sido expuesto a la lluvia o la humedad, si no funciona de modo
normal, o si se ha caído.
15. NO exponga este aparato a chorros o salpicaduras de líquidos. NO coloque objetos
llenos con líquido, tales como floreros, sobre el aparato.
16. El enchufe de alimentación principal o acoplador de aparato electrodoméstico deberá
permanecer en condiciones de funcionamiento.
17. El nivel de ruido transmitido por el aire del aparato no excede de 70 dB (A).
18. Los aparatos de fabricación CLASE I deberán conectarse a un tomacorriente DE
ALIMENTACIÓN con clavija de puesta a tierra protectora.
19. Para reducir el riesgo de causar un incendio o sacudidas eléctricas, no exponga
este aparato a la lluvia ni a humedad.
20. No intente modificar este producto. Hacerlo podría causar lesiones personales y/
o la falla del producto.
UTILICESE únicamente con un carro, pedestal, trípode,
escuadra o mesa del tipo especificado por el fabricante o ven-
dido con el aparato. Si se usa un carro, el mismo debe mov-
erse con sumo cuidado para evitar que se vuelque con el
aparato.
Este símbolo indica que la unidad contiene niveles de voltaje
peligrosos que representan un riesgo de choques eléctricos.
Este símbolo indica que la literatura que acompaña a esta
unidad contiene instrucciones importantes de funcionamiento
y mantenimiento.
ADVERTENCIA: Los voltajes presentes en este equipo representan un riesgo para la vida. No contiene componentes reparables por el
usuario. Toda reparación debe ser llevada a cabo por técnicos calificados. Las certificaciones de seguridad no tienen vigencia cuando el
voltaje de funcionamiento de la unidad es cambiado a un valor distinto al ajustado en fábrica.

! ISTRUZIONI IMPORTANTI PER LA SICUREZZA !
1. EGGETE queste istruzioni.
2. CONSERVATE queste istruzioni.
3. OSSERVATE tutte le avvertenze.
4. SEGUITE tutte le istruzioni.
5. NON usate questo apparecchio vicino all'acqua.
6. PULITE l'apparecchio SOLO con un panno asciutto.
7. NON ostruite alcuna apertura per l'aria di raffreddamento. Installate l'apparec-
chio seguendo le istruzioni del costruttore.
8. NON installate l'apparecchio accanto a fonti di calore quali radiatori, aperture
per l'efflusso di aria calda, forni o altri apparecchi (amplificatori inclusi) che gen-
erino calore.
9. NON modificate la spina polarizzata o con spinotto di protezione. Una spina polar-
izzata è dotata di due lame, una più ampia dell'altra. Una spina con spinotto è dot-
ata di due lame e di un terzo polo di messa a terra. La lama più ampia ed il terzo
polo hanno lo scopo di tutelare la vostra incolumità. Se la spina in dotazione non si
adatta alla presa di corrente, rivolgetevi ad un elettricista per far eseguire le modi-
fiche necessarie.
10. EVITATE di calpestare il cavo di alimentazione o di comprimerlo, specie in cor-
rispondenza di spine, prese di corrente e punto di uscita dall'apparecchio.
11. USATE ESCLUSIVAMENTE i dispositivi di collegamento e gli accessori specificati
dal costruttore.
12.
13. SCOLLEGATE l'apparecchio dalla presa di corrente in caso di temporali o di non uti-
lizzo per un lungo periodo.
14. RIVOLGETEVI a personale di assistenza qualificato per qualsiasi intervento. È nec-
essario intervenire sull'apparecchio ogniqualvolta sia stato danneggiato, in qualsiasi
modo, ad esempio in caso di danneggiamento di spina o cavo di alimentazione, ver-
samento di liquido sull'apparecchio o caduta di oggetti su di esso, esposizione
dell'apparecchio a pioggia o umidità, funzionamento irregolare o caduta.
15. NON esponetelo a sgocciolamenti o spruzzi. NON appoggiate sull'apparecchio
oggetti pieni di liquidi, ad esempio vasi da fiori.
16. La spina di alimentazione o un attacco per elettrodomestici devono essere sem-
pre pronti per l'uso.
17. Il rumore aereo dell'apparecchio non supera i 70dB (A).
18. L'apparato con costruzione di CLASSE I va collegato ad una presa elettrica dot-
ata di messa a terra di protezione.
19. Per ridurre il rischio di incendio o folgorazione, non esponete questo apparec-
chio alla pioggia o all’umidità.
20. Non tentate di modificare il prodotto. Tale operazione può causare infortuni e/o il
guasto del prodotto stesso.
USATE l'apparecchio solo con carrelli, sostegni, treppiedi,
staffe o tavoli specificati dal costruttore o venduti insieme
all'apparecchio stesso. Se usate un carrello, fate attenzione
durante gli spostamenti per evitare infortuni causati da un
eventuale ribaltamento del carrello stesso.
Questo simbolo indica la presenza di alta tensione all'interno
dell'apparecchio, che comporta il rischio di folgorazione.
Questo simbolo indica la presenza di istruzioni importanti per
l'uso e la manutenzione nella documentazione in dotazione
all'apparecchio.
AVVERTENZA: le tensioni all'interno di questo apparecchio possono essere letali. L'apparecchio non contiene parti che possono essere
riparate dall'utente. Per qualsiasi intervento, rivolgetevi a personale di assistenza qualificato. Le certificazioni di sicurezza non sono valide se
si cambia la tensione di funzionamento rispetto al valore prefissato in fabbrica.

安全にお使いいただくために 
☀椉ቧ㚜⹂ቑ⮶ሰሸቋ⒖扺ቑ䲚ㄵት㢝䯉ሼቮቂቤ቎ᇬ崳ቆቂ㔀ሧትሼቮቋ䞮ሻቮሶቋሯ㎂⸩ሸቯቮ␔⹈ት㶰ቑ⸩券ቑቫሩ቎ᇷ巵
⛙ᇸᇷ㽷㎞ᇸቑℛቇ቎◉⒕ሺ቉ሧቡሼᇭ
ሶቑ嫷䯉␔⹈ት䎰尥ሺ቉崳ቆቂ♥ቭ㔀ሧትሼቮቋᇬ㸊ℰቡቂቒ摜⍆ት弯ሩ♾厌㊶ሯ㎂⸩ሸቯቮ␔⹈ቊሼᇭ
ሶቑ嫷䯉␔⹈ት䎰尥ሺ቉崳ቆቂ♥ቭ㔀ሧትሼቮቋᇬ⍆⹂ት弯ሩ♾厌㊶ቡቂቒ䓸䤓㚜⹂ሯ䤉䞮ሼቮ♾厌㊶ሯ
㎂⸩ሸቯቮ␔⹈ቊሼᇭ
注意
巵⛙
巵⛙
㠃⌨ቑ椪ቒᇬ彖㫋ቑሥቮ㠃⌨㕔㇢劔቎㉔ሽሷ䦇嵖ሲቃሸሧᇭ榊䄟ነዙኦቧኴ዆ኍቑ㚜⍆ᇬ䁁⇢ቧ䟿䓸ሯ孔函␔቎⏴ቭ手ವ
ቶቃ⫃⚗ᇬ孔函ሯ楷ቧ䄎㺦቎ሸቬሸቯቂ⫃⚗ᇬ㷲デ቎⇫╤ሺቍሧ⫃⚗ᇬ孔函ት囌ቋሺቂ⫃⚗ቍቌᇬ孔函ሯ⇤ቬሮቑ䕅㏚
ቊ㚜⍆ሺቂ⫃⚗ቒᇬ㠃⌨ሯ㉔尐ቊሼᇭ
孔函቎㻃䆃ቧሺ቙ሰሯⅧሮቍሧቫሩ቎ሺ቉ሲቃሸሧᇭ孔函ቑₙ቎啀䞅ቍቌቑ䁁⇢ቑ⏴ቆቂ䓸ት函ሮቍሧቊሲቃሸሧᇭವ
㦻完❐ቑ㟈抯ቒ峵ቢቍሧቊሲቃሸሧᇭ㟈抯ሺቂ⫃⚗቎ቒ㊹㒠ቧ完❐㟔椫ቑ☮⥯ቋቍቭቡሼᇭವ
注意
ሶቑ完❐ቒ㻃ቑ扠ሲቊ∎䞷ሺቍሧቊሲቃሸሧᇭವ
㘒棳ቒᇬ㉔ሽℍሧቂをቊ㕼ሧ቉ሲቃሸሧᇭವ
抩欷♲ት⫭ሯቍሧቫሩ቎ሺ቉ሲቃሸሧᇭ∎䞷崻㢝㦇቎㈢ቆ቉岼函ሺ቉ሲቃሸሧᇭವ
዆ንኅዙኜዙቧ㤥㓎抐欷♲ᇬኖእዙኳᇬቀቑⅥᇬ䑀ት䤉䞮ሼቮ㳮⣷᧤ቿዐኴቍቌ᧥ቑ扠ሲ቎ቒ岼函ሺቍሧቊሲቃሸሧᇭವ
㦘㰄ኴ዆ኍቧቿዙኖⅧሰኴ዆ኍቒ⸘⏷ቑቂቤ቎䞷ሧቬቯ቉ሧቡሼᇭ䎰╈቎ሺቍሧቫሩ቎ሺ቉ሲቃሸሧᇭ㦘㰄ኴ዆ኍቒᇬವ
㦻ቑኳዉዙኦቑሩቄ₏㡈ሯピㄒ቎ቍቆ቉ሧቡሼᇭቿዙኖⅧሰኴ዆ኍቒᇬ㦻ቑኳዉዙኦቑⅥ቎ᇬ㦻䥽ቑቿዙኖቑ㭡ሯቇ
ሧ቉ሧቡሼᇭピㄒቑኳዉዙኦቧ㦻䥽ቑ㭡ቒᇬ⸘⏷ቑቂቤ቎ሥቮብቑቊሼᇭሶቯቬቑኴ዆ኍሯነዐኘዐእቑぽሺ手ቢ♲቎
⚗ቲቍሧ⫃⚗ቒᇬ榊㺦ぴℚ㯼劔቎䦇嵖ሺᇬነዐኘዐእትℳ㙪ሺ቉ብቬቆ቉ሲቃሸሧᇭ
榊䄟ነዙኦቒᇬ䔈቎ኴ዆ኍぽሺ手ቢ捷⒕ᇬㆅ栆ነዙኦᇬ㳮⣷ሮቬ⒉቉ሧቮ捷⒕቎ርሧ቉ᇬㆤቆሮሮቆ቉㔫ሴቂቭ㖮ቡቯವ
ቂቭሺቍሧቫሩ቎≬帆ሺ቉ሲቃሸሧᇭ
ቿኜአኞኾዐእቧⅧ⻭❐ቒᇬ㉔ሽኾዙኈዙ㖖⸩ቑብቑትሷⒸ䞷ሲቃሸሧᇭವ
ኈዙእቧኖኜዐኦᇬₘ厩ᇬኳ዆኎አእᇬኣዙኳወ䷘ቒᇬኾዙኈዙ㖖⸩ቑብቑሮᇬሶቑ孔函䞷቎弸⮁ሸቯ቉ሧቮብቑት㉔ವ
ሽሷⒸ䞷ሲቃሸሧᇭኈዙእት∎䞷ሼቮ⫃⚗ቒᇬ孔函ት憘ሾ቉䲊╤ሼቮ椪ᇬ㊹㒠ትሺቍሧቫሩ㽷㎞ሺ቉ሲቃሸሧᇭ
榆ት⇃ሩ⿟ቑ椪ᇬቡቂቒ栆㦮栢∎䞷ሺቍሧ⫃⚗ቒᇬኴ዆ኍትነዐኘዐእሮቬ㔫ሧ቉ሲቃሸሧᇭವ
Ɣ抐≰㳮㔏嫢⪉䄥拸⚗峋㢝዆኶ወ቎ቇሧ቉
抐≰㳮ቒ榊㽱㽤ቊ尞⸩ሸቯቮ㔏嫢⪉䄥拸⚗峋㢝❐ቊሼᇭ峋㢝䟹⚆ት岧ሺቂ峋㢝዆኶ወሯ♿ሽቇ彋ቆ቉ሥቭቡሼᇭ嫷䯉ቑ㟈⮘ᇬ
棳♊ቒ㽤㈚ቊ䰐ሻቬቯ቉ሧቡሼቑቊᇬቢቃቭ቎⓴ሯሺቂቭᇬ㚜⍆ሼቮሶቋቑቍሧቫሩ㽷㎞ሺ቉ሲቃሸሧᇭ
Ɣ拤㽤㟈抯቎ቇሧ቉
㳮⣷ት⒕屲ሺቂቭᇬ␔捷ቑ捷❐቎屵ቯቂቭሺቍሧቊሲቃሸሧᇭ㟈抯䷘ቒ㽤㈚ቊ䰐ሻቬቯ቉ሧቡሼᇭ

TABLE OF CONTENTS
ENGLISH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INTERNAL MODIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FRANÇAIS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
BRANCHEMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
MONTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
MODIFICATIONS INTERNES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CARACTÉRISTIQUES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DEUTSCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ANSCHLÜSSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
MONTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INTERNE MODIFIKATIONEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
TECHNISCHE DATEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ESPAÑOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
CONEXIONES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
INSTALACION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
MODIFICACIONES INTERNAS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
ESPECIFICACIONES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
ITALIANO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
COLLEGAMENTI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
INSTALLAZIONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
MODIFICHE INTERNE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DATI TECNICI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
日本語. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
接続. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
取付け . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
内部の変更 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
仕様. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7
ENGLISH
SHURE SCM268
DESCRIPTION
The Shure Model SCM268 is a transformer-balanced, four-channel mi-
crophone mixer. Its simple, compact design delivers superior perfor-
mance and exceptional sound quality with low noise and a flat frequency
response.
Versatile in all types of applications, the SCM268 integrates transform-
er-balanced XLR inputs, a switchable microphone/line level transform-
er-balanced XLR output, phono jack inputs and output, phantom power,
and an auxiliary input channel. It can function as a primary or add-on mix-
er for sound reinforcement, recording, broadcast, or audio-visual presen-
tation systems.
With the supplied hardware, the mixer's half-rack chassis mounts se-
curely in single or dual rackmount installations. For fixed installations, the
SCM268 can be fastened on or below a shelf, counter, or tabletop.
FEATURES
• Four transformer-balanced microphone inputs
• Transformer-balanced output-switchable mic/line level
• Five -10 dB line-level inputs
• Six-segment LED output level meter
• Built-in 12-volt phantom power
• Internal power transformer
• Built-in low-cut filter on microphone inputs (below 80 Hz)
FRONT PANEL
Gain Controls (1-4). Adjusts gain for microphone level
inputs and auxiliary level inputs 1-4.
Auxiliary Channel Gain Control (AUX IN). Adjusts the
auxiliary channel input gain.
Output Meter. LED meter indicates peak output signal
level.
Master Gain Control (MASTER). Adjusts overall output
level.
Power Indicator (POWER). This LED illuminates when the
unit is plugged in and receiving power.
NOTE: The SCM268 does not have a power switch. To turn the unit
off, unplug the power cord or use an external power strip with a
switch. However, it can remain plugged in as it uses very little power
when idle.
REAR PANEL
Power Connector. Accepts 100-120 Vac (SCM268) or
220-240 Vac (SCM268E).
Output Connector (MIC/LINE OUT). Transformer-bal-
anced XLR output connector. Switchable between line and
microphone level.
Output Level Switch (MIC/LINE OUT). Recessed switch
changes the signal level of the XLR output connector:
In = Microphone Level
Out = Line Level
Auxiliary Output Connector (AUX OUT). Phono jack
feeds consumer-level audio equipment. Not affected by
MIC/LINE switch.
Auxiliary Level Inputs (AUX LEVEL INPUTS, 1-4). Phono
jacks connect to consumer-level audio sources.
Auxiliary Input Channel (AUX IN). A dedicated auxil-
iary-level input for the auxiliary channel.
Phantom Power Switch (12V PHANTOM). Recessed
switch turns on phantom power for microphone inputs 1-4.
Microphone Level Inputs (MIC LEVEL INPUTS). Trans-
former-balanced, microphone-level XLR inputs.
1 2 3 4 5
1
2
3
4
5
1 2 3 4 5 6 7 8
1
2
3
4
5
6
7
8

8
ENGLISH
GAIN CONTROL
INPUT GAIN
The gain control knobs 1-4, located on the front panel, adjust the gain
for both microphone and auxiliary-level inputs of channels 1-4 (see Figure
1). For example, the channel 1 gain control is used for both the channel 1
microphone input (MIC LEVEL INPUT 1)
and the channel 1 auxiliary level
input (AUX LEVEL INPUT 1). The auxiliary gain control knob (AUX IN) af-
fects only the auxiliary input (AUX IN).
OUTPUT GAIN
The master output gain control knob (MASTER) adjusts gain to both
the XLR balanced output (MIC/LINE LEVEL) and the auxiliary level output
(AUX LEVEL).
OUTPUT LEVEL METER
The six LEDs on the front panel labeled OUTPUT LEVEL METER illu-
minate to reflect the peak level of the mixed output signal from the
SCM268 (in reference to balanced line output) in dBu (0 dBu = 0.775 V).
Use the master gain control (MASTER) to adjust peak levels, as indi-
cated by the LEDs. The red LED illuminates when the output is 2 dB be-
low clipping.
PHANTOM POWER
When the phantom power switch on the back panel is on (12V PHAN-
TOM-ON), the SCM268 provides 12 V of phantom power to each XLR mi-
crophone input. The switch is recessed to prevent accidental
engagement. Most condenser microphones require phantom power. Use
it when connecting these types of microphones to the SCM268.
NOTE: Phantom power does not affect the operation of balanced
dynamic microphones. With phantom power on, they can be
connected to the SCM268 in combination with condenser
microphones that do use it.
OUTPUT LEVEL SWITCH
The output level switch on the back panel (MIC/LINE OUT) sets the
level of the balanced XLR output. When set to MIC, it reduces the output
by about 50 dB. Set the switch so that the output level matches the input
level of the device to which you are connecting the SCM268. The switch
is recessed to prevent accidental engagement.
NOTE: The output level switch does not affect the auxiliary output
(AUX OUT) level.
Channel 1 Channel 3
Channel 2
Channel 4
Master Output
Auxiliary Channel
GAIN CONTROL
FIGURE 1
GREEN-Nominal RED-Clip
Peak in dBu
Phantom Power Switch
OFF ON
Output Level Switch
LINE MIC

9
ENGLISH
CONNECTIONS
The following diagram illustrates a few of the many types of connec-
tions possible with the SCM268. Note that nothing is connected to the
channel 4 microphone input (MIC LEVEL INPUT 4). This is because
channel 4 is being used for the consumer-level equipment connected to
the channel 4 auxiliary level input (AUX LEVEL INPUT 4). Connecting
both auxiliary level and microphone level inputs to a single channel is not
recommended because the SCM268 would not be able to independently
mix the two sources.
Â
Â
Â
Â
Â
Â
AUX IN
CONSUMER-LEVEL
EQUIPMENT
CHANNEL 4
CONSUMER-LEVEL
EQUIPMENT
CHANNEL 3
DYNAMIC
MICROPHONE
CHANNEL 2
CONDENSER MI-
CROPHONE
CHANNEL 1
DYNAMIC
MICROPHONE
CD PLAYER
OR
AM/FM RECEIVER
OR
TAPE DECK
POWER SUPPLY
AMPLIFIER 70 V P.A.
LOUDSPEAKERS AUX OUT
OR
OR
LINE OUT
VCR

10
ENGLISH
INSTALLATION
SUPPLIED HARDWARE
• 4 rubber feet. For stand-alone installation.
•
1 rackmount bracket, long. For half-rack (single unit) instal-
lations.
•
1 rackmount bracket, short. For half-rack (single) or du-
al-mount installations.
•
2 straddle brackets. For dual-mount or fixed installations.
•
12 bracket screws, 1/4 in. (6 mm). For securing the brackets
to the chassis.
•
4 rackmount screws, 1 in. (2.5 cm). For mounting the unit in
a rack.
•
4 plastic washers. For use with the supplied rackmount
screws.
•
4 wood screws, 1/2 in. (1.25 cm). For fixed installations.
RACKMOUNT INSTALLATION
The SCM268 can be mounted as a single unit or dual-mounted with ei-
ther another SCM268 or another Shure half-rack unit such as the
SCM262 or DFR11EQ.
Attach the rackmount brackets using one of the
following methods:
Single unit (half-rack) installation:
1. Attach the short and long rackmount brackets to the SCM268
with eight (8) of the supplied bracket screws.
Dual-mounted installation:
1. Connect the two units together side-by-side using two (2)
straddle brackets. The brackets should straddle the recessed
edges on on the top and bottom of each chassis. Fasten
them using eight (8) bracket screws.
NOTE: Be sure to use both straddle brackets-one on the top and
one on the bottom.
2. Attach the short rackmount brackets to the outsides of the com-
bined units with eight (8) of the bracket screws.
3. After attaching the brackets, mount the unit in an equipment rack
using the supplied rackmount screws and plastic washers.
STAND-ALONE INSTALLATION
Adhere the four (4) supplied rubber feet to the bottom of the unit at
each corner. This will keep it from sliding and protect the table surface.
FIXED INSTALLATION
To permanently affix the SCM262 above or below a table, shelf, or
counter top, use the following steps:
1. Fasten the straddle brackets to the recessed edges of the chassis
using four (4) bracket screws.
Top mount: Fasten the straddle brackets to on the bottom of the
unit
Hanging mount: Fasten the straddle brackets to the top of the unit.
2. Fasten the straddle brackets to the surface using the four (4) sup-
plied wood screws.
TOP MOUNT
HANGING MOUNT
Wood Screw
Rackmount Screw
Bracket Screw

11
ENGLISH
INTERNAL MODIFICATIONS
DISASSEMBLY
To access the printed circuit board (pc board) for internal modifica-
tions, use the following steps:
1. Unplug the power cord.
2. Remove the knobs and retainer nuts from the front panel (See
Figure 2).
KNOB ASSEMBLY
FIGURE 2
3.
Remove the four screws at each corner of the back panel.
4. Remove the two screws at each bottom corner of the front panel
5. Slide the back panel and pc board out from the rear of the chas-
sis.
CAUTION: When reassembling the SCM268, DO NOT
OVERTIGHTEN the knob retainer nuts. Use a minimal amount of
force to secure the nut (0.6-0.8 N⋅m (5-7 in⋅lb)). Damage to the
internal components will result if too much force is used.
LOW-CUT FILTER
To bypass the built-in low-cut filter for a given channel, remove the
specified resistor and place a 10
μ F to 33 μ F capacitor in the specified pc
board location (polarity does not matter). Refer to the following table:
To select a particular corner frequency for the low cut filter, remove the
R18, R28, R38, or R48 resistor for a given channel as specified above.
Then, in the corresponding pc board location (X17, X27, X37, or X47),
place a capacitor of the specified value (polarity does not matter). Refer
to the following formula for selecting the correct capacitor value for the de-
sired corner frequency.
where:
C = value of capacitor in μF
F = corner frequency (-3 bB) for low-cut filter in Hz
The following table lists the low-cut frequency corners for some of the
most common capacitor values:
PHANTOM POWER DISABLE
To disable phantom power for a given microphone input, remove the
specified resistor as listed in the following table:
LINE PAD
To insert a 50 dB line pad for a given microphone input, remove the
specified resistor and short the solder points at the specified pc board lo-
cations. Refer to the following table:
HOT MIC PAD
Some condenser mics have a high output. In order to avoid overdriv-
ing the input stage, the user may need to set the input pot lower than de-
sired. To fix this problem, the user can place an 11 dB pad into the input
gain stage of a selected channel.
1. Twist together the leads from one side of a 15 k Ωresistor and a
0.1 μF capacitor:
2. Solder the free ends of the resistor-capacitor combination into the
holes at the jumper position indicated by the following table and
remove the corresponding surface mount resistor.
WARNING! Voltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel.
Channel Remove Resistor from: Place 10μF to 33μF
Capacitor in:
1R18 X17
2R28 X27
3R38 X37
4R48 X47
C26.5 F⁄=
Capacitor Value (μF) Low-Cut Frequency Corner (Hz)
.033 803
.047 564
.068 390
.1 265
.22 120
.33 80
.47 56
.68 39
1.0 26.5
2.2 12
Channel Remove Resistor:
1R15
2R25
3R35
4R45
Channel Remove Resistors: Short Solder Points:
1 R12, R13, R15 X11 and X14
2 R22, R23, R25 X21 and X24
3 R32, R33, R35 X31 and X34
4 R42, R43, R45 X41 and X44
Channel Remove
Resistor Insert Resistor-Capacitor Combination at Jumper
1R18 X17
2R28 X27
3R38 X37
4R48 X47
15 KΩ
0.1 ΜF

12
ENGLISH
SPECIFICATIONS
Measurement Conditions (unless otherwise specified): Line voltage 120 Vac, 60 Hz (SCM268) or 230 Vac, 50 Hz (SCM268E); full gain; 1 kHz, one channel
activated; source impedances: Mic 150 Ω, Aux Level 150 Ω; terminations: Line 600 Ω, Mic 600 Ω, Aux Out 10 kΩ. 12 V phantom power off.
Frequency Response (Ref 1 kHz, controls centered)
Microphone Inputs: 150 Hz to 20 Khz ±2 dB (built-in 80Hz
low-cut)
Auxiliary Inputs: 20 Hz to 20 kHz ±2 dB
Low-Cut Filter (Microphone inputs only)
3dB down at 80 Hz, 6 dB/octave
Gain (typical, controls full clockwise)
Inputs
Outputs
Total Harmonic Distortion
<0.25% at +4 dBu output level (through 22 Hz—22 kHz filter;
Input 1 and Master centered, all other controls full counter-
clockwise)
Equivalent Input Hum and Noise(150 Ωsource; through 22
Hz—22 kHz filter)
124 dBV
Output Hum and Noise (through 22 Hz—22 kHz filter; chan-
nel controls full counterclockwise)
Master full counterclockwise: –92 dBV
Master full clockwise: –70 dBV
Common Mode Rejection
>80 dB at 1 kHz
Polarity
All inputs to all outputs are non-inverting
Overload and Shorting Protection
Shorting outputs, even for prolonged periods, causes no
damage. Microphone inputs are not damaged by signals up
to +10 dBV; Auxiliary inputs by signals up to +36 dBV
Phantom Power
12 Vdc open-circuit through 340Ωseries resistance
Operating Voltage
SCM268: 100—120 Vac rated nominal, 50/60 Hz, 60 mA
SCM268E: 220—240 Vac rated nominal, 50/60 Hz, 30 mA
Temperature Range
Operating: –7°to 49°C (20°to 120°F)
Storage: –29°to 74°C (–20°to 165°F)
Overall Dimensions
44 mm H x 218 mm W x 162 mm D
(1.72 x 8.60 x 6.37 inches)
Net Weight
1.20 Kg (2 lbs, 10 oz)
Certifications
SCM268: UL & cUL Listed by Underwriters Laboratories, Inc.
SCM268E: Eligible to bear CE Marking. Conforms to Euro-
pean EMC Directive 89/336/EEC. Meets applicable tests and
performance criteria in European Standard EN55103 (1996)
parts 1 and 2, for residential (E1) and light industrial (E2) en-
vironments.
Replacement Parts
Knob, Master (blue) ............................................... 95B8752
Knob, Channel Gain (white)................................... 95A8752
Line (Power) Cords:
SCM268: 100-120 Vac (US/Canada)................ 95A8762
SCM268E: 220-240 Vac (EU) ........................... 95A8778
Fuse, SCM268 (5x20 mm,
250V, 80mA, slow-blow)........................................... 80A730
Fuse, SCM268E (5x20 mm,
250V, 40mA, slow-blow)............................................80J258
Hardware Kit ........................................................90AF8100
Link Bars (Bracket) ................................................ 53A8443
Single Mount Bracket............................................. 53A8484
Dual Mount Bracket ............................................... 53B8484
Optional Accessories
Line (Power) Cord, 230-240 Vac (UK) ................... 95A8713
Input Output
Mic Line Aux Out
Low-impedance mic
(150 Ω)38 dB 76 dB 65 dB
Aux Level 3 dB 40 dB 29 dB
Input Impedance
Designed for
use with Actual (typical) Input Clipping Level
Mic 19-600 Ω1.2 kΩ–5 dBV
Aux Level ≤2 kΩ21 kΩ>28 dBV
Output Impedance
Designed for
use with Actual (typical) Output Clipping Level
Mic low-Z inputs 0.2 Ω–21 dBV
Line >600 Ω72 Ω+18 dBV
Aux Out >2 kΩ870 Ω+7 dBV

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