AKG C 680 BL Owner's manual

Bedienungshinweise

User Instructions

Mode d’emploi

Istruzioni d’uso

Modo de empleo

Instruções de Uso

C 680 BL

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Netzgerät zum Betrieb von sechs Mikrofonen N 66 E

1. Description

The C 680 BL is a cardioid condenser table microphone. Thanks to its small

dimensions, the C 680 BL can be placed so it will not distract the speaker.

When lying on a table or lectern the microphone element is very close to

a boundary. This design prevents any comb filter effects or other acoustic

interferences which would normally exist at microphone positions close to

reflecting surfaces.

The supporting surface (tabletop, lectern, etc.) limits the pickup area. In

other words, the microphone will only pick up sounds arriving from above

the table or lectern. (See the dashed lines in figs. 1 and 2.)

Fig. 1: Placement on a lectern. Fig. 2: Placement on a table.

A transducer shock mount prevents vibrational noise such as knocking or

footsteps from being picked up.

The microphone has a low-impedance, electronically balanced output

allowing it to be powered from phantom power sources. If you use an AKG

power supply (B 18, N 62 E, or N 66 E) you may connect the C 680 BL to

balanced or unbalanced inputs. The required phantom power adapter is

integrated in the microphone case.

The C 680 BL is fitted with a fixed, 3-m (10-ft.) cable with an XLR connector.

2. Uses

2.1. Placement

Place the microphone on the conference table or lectern so that the micro-

phone will be at least 40 cm (16 in.) but no further than 1 m (40 in.) away

from the speaker’s mouth.

2.2. Permanent Installation

1. Fix the supplied adhesive strips to the underside of the microphone.

2. Remove the protective films from the adhesive strips and press the

microphone against the tabletop at the desired position.

The adhesive strips are non-tainting and you can remove the micro-

phone at any time.

2.3. Repainting the C 680 BL

If you wish to blend the microphone in with the interior decoration of the

room you can repaint the C 680 BL as described below:

1. Remove the two Phillips screws from the underside of the microphone.

2. Remove the case.

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3. Carefully lift the grid out of the bottom panel.

4. Place the case on a wood block to lift the edge of the case off the

workbench surface.

Ventilate the room and be sure to observe the instructions provided

by the paint manufacturer. When using spray paints, wear a respi-

rator and use a spray booth.

Important:

Do not paint the grid. The paint would inevitably restrict or clog the holes

and thus severely degrade the acoustic performance of the microphone.

3. Powering

The C 680 BL is a condenser microphone and therefore needs a polarization

voltage (”phantom power”).

If your mixer provides phantom power, switch the phantom power on. (Refer

to the relevant section in your mixer manual.)

3.1. Using Optional Phantom Power Supplies

If your mixer has no phantom power, insert an external phantom power

supply between the microphone and mixer input. We recommend the

optional N 62 E or N 66 E AC power supplies or B 18 battery supply (also

optional) from AKG. Using any power supplies not recommended by

AKG may damage your microphone and voids the warranty.

3.2. Retrofitting Phantom Power

You may also consider retrofitting a phantom power supply as per DIN 45596

to your mixer. If you do so, be sure to observe the precautions and war-

ranty conditions in the manual for the equipment in which you intend to

install the phantom supply.

3.2.1. Balanced Inputs

The DIN 45596 standard specifies a positive voltage of 12, 24, or 48 V on

the audio lines versus the cable shield. For balanced inputs, we recom-

mend the following wiring schemes:

Fig. 3: Input transformer with center tap (ungrounded).

Fig. 4: Input transformer without center tap (ungrounded).

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Standard values for Rv and 2 x Rv:

VDC Rv 2 x Rv

12 V ±2 V 330 Ω ±10% 680 Ω ±10%

24 V ±4 V 680 Ω ±10% 1,200 Ω ±10%

48 V ±4 V 3,300 Ω ±10% 6,800 Ω ±10%

Important:

In order to satisfy the DIN 45596 symmetry requirement, make sure the

actual values of the two resistors 2 x Rv do not differ by more than 0.4%!

3.2.2. Unbalanced Inputs

If the equipment inputs are grounded or transformerless, wire either

capacitors or extra transformers into the audio lines as shown below in order

to prevent any current leakage into the input stage.

Fig.5: Retrofitting phantom power to unbalanced inputs.

4. Cleaning

Clean all exterior surfaces with methylated spirits or alcohol.

5. Dimensional 6. Polar Diagram

Drawing

7. Frequency Response

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8. Specifications

8.1. Microphone

Type: Self-polarized condenser microphone

Polar pattern: Cardioid

Frequency range: 60 to 20,000 Hz

Sensitivity: 30 mV/Pa (-30 dBV)

Impedance: ≤200 Ω

Recommended load impedance: ≥2,000 Ω

Max. SPL for 1% THD: 115 dB SPL

Signal/noise ratio re 1 Pa (A weighted): 67 dB (A)

Supply voltage: 9 VDC to 52 VDC phantom power to DIN 45596

Current consumption: ≤2 mA

Connector: 3-pin XLR

Cable length: 3 m (10 ft.)

Size: 97 x 67 x 20 mm (3.8 x 2.6 x 0.8 in.)

Net weight: 100 g (3.5 oz.) (without cable and connector)

This product conforms to EN 50 082-1

8.2. Standard Accessories

Fixed 10-m (33-ft.) cable w/XLR connector

2 special adhesive strips

8.3. Optional Accessories

B 18 battery power supply

N 62 E AC power supply for two microphones

N 66 E AC power supply for six microphones

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Valori standard per Rv (e/o 2 x Rv):

V al. Rv 2 x Rv

12 V ±2 V 330 Ω ±10% 680 Ω ±10%

24 V ±4 V 680 Ω ±10% 1,200 Ω ±10%

48 V ±4 V 3,300 Ω ±10% 6,800 Ω ±10%

Importante:

Per adempiere alle esigenze di simmetria secondo DIN 45596, i valori attuali

delle resistenze 2xRv possono deviare al massimo del 0,4%.

3.2.2. Ingressi asimmetrici

Se gli ingressi del dispositivo sono collegati a terra o non esistono tras-

formatori d’ingresso, inserite condensatori o trasformatori addizionali nelle

linee audio per evitare un impedimento dello stadio d’ingresso causato da

correnti di fuga.

Fig. 5: Alimentazione virtuale per ingresso asimmetrico

4. Avvertenze per la pulizia

Pulite le superfici metalliche con spirito (industriale) o alcool.

5. Disegno 6. Diagramma

dimensionale polare

7. Curva di frequenza

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8. Datos técnicos

5.1. Micrófono

Funcionamiento: transductor de condensador con carga permanente

Característica direccional: cardioide

Gama de frecuencia: 60 a 20.000 Hz

Sensibilidad a 1000 Hz: 30 mV/Pa (-30dBV)

Impedancia eléctrica: ≤200 Ω

Impedancia de carga recomendada: ≥2000 Ω

Nivel de presión sonora máx.

para factor de distorsión no lineal de 1%: 115 dB SPL

Relación señal/ruido rel. con 1 Pa (pond.A): 67 dB (A)

Tensión de alimentación: 9 a 52 V CC seg. DIN 45596

Toma de corriente: ≤2mA

Conector: XLR de 3 polos

Longitud del cable de conexión: 3 m

Dimensiones: 97x67x20 mm

Peso neto: aprox. 100 g (sin cable ni conector)

Este producto cumpie con la norma EN 50 082-1

8.2. Accesorios incluidos

Cable de conexión de 3m de largo con clavija XLR

2 cintas adhesivas especiales

8.3. Accesorios recomendados

Alimentador de batería B18

Alimentador de red para dos micrófonos N 62 E

Alimentador de red para seis micrófonos N 66 E

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Valores padronizados para Rv (e 2 x Rv):

V DC Rv 2 x Rv

12 V ± 2 V 330 Ω ±10% 680 Ω ±10%

24 V ± 4 V 680 Ω ±10% 1200 Ω ±10%

48 V ± 4 V 3300 Ω ±10% 6800 Ω ±10%

Importante:

A fim de satisfazer os requerimentos de simetria da DIN 45596, certifique-

se de que os valores atuais dos dois resistores 2 x Rv não sejam diferen-

tes em mais do que 0.4 %!

3.2.2. Entradas não balanceadas

Se as entradas dos equipamentos estão aterradas ou não existem trans-

formadores de entrada disponíveis, ou capacitores ou transformadores opcio-

nais tem podem ser instalados nas linhas de àudio a fim de prevenir qual-

quer fuga de corrente para dentro do circuito de entrada.

Fig. 5: Alimentação de phantom power para entradas não balanceadas

4. Limpeza

Limpe todas as superfícies externas com àlcool industrial

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5. Desenho das 6. Diagrama Polar

Dimesões

7. Frequência de Resposta

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AKG C 680 BL Owner's manual

AKG C 680 BL Owner's manual

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