WUNDER cm7 Manual

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This microphone has been meticulously created to meet the demand for

the U47 sound using historically correct components around the "heart"

of the microphone – the original, specially selected EF14 tube.

It should be stressed at this point, that vacuum tubes with their heater

ﬁlaments are much more delicate than solid-state components.

Consequently, the user has to take great care in handling the microphone.

Drops from even moderate heights may cause the ﬁlament to break and

would result in immediate failure of the microphone. It would be advisable

for the users to keep a spare tube – specially selected by an Wunder

Audio Service Department – always ready or replacement.

Repairs are to be carried out only by experienced, authorized service personal. Unauthorized

opening or modiﬁcation to the equipment shall void the warranty. High Operation voltages are

required for the tube in the microphone. Contact with the voltages present in the interior of the

device can result in injury of death; therefore, the microphone and PSU must be opened only

by authorized, qualiﬁed personnel. The microphone must be operated only with the supplied

cable. Since hazardous voltages are generated by the PSU that can result in injury or death,

always ensure that the microphone cable used is undamaged, Damaged cables must no

longer be used.

Please note: tube may have become slightly unplugged in shipping. If

after shipping the microphone has no audio output, 99% of the time it is a

result of a slightly unplugged tube.

1. Disconnect microphone from PSU.

2. Remove the three bright nickel screws at the lower end of the

microphone grille housing.

wunder cm7

Replacing the vacuum tube

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Summary of Contents for WUNDER cm7

Page 1 Drops from even moderate heights may cause the ﬁlament to break and would result in immediate failure of the microphone. It would be advisable for the users to keep a spare tube – specially selected by an Wunder Audio Service Department – always ready or replacement.
Page 2 8. Installing a new tube is simply the reverse order of these steps. Operation The CM7 is equipped with a 6-pin Tuchel connector that plugs into the base of the microphone and screwed ﬁnger tight. Always make sure that the PSU is switched off when plugging the mic connector into the mic and PSU.
Page 3 The warm-up time of the CM7 is approximately one minute. When your CM7 is new, a 24 hour burn-in period is recommended. The CM7’s tube will “break in” over a period of time enabling the CM7 to sound subtly better over a period of time.
Page 4 To set the switch to 115V, toggle the switch towards the transformer. To set the switch to 230V, toggle the switch away from the transformer. Warning: Connecting the CM7 to the wrong AC voltage may destroy the unit and cause ﬁre and/or electric shock.
Page 5 Shutdown and Storage Before switching off the microphone or disconnecting cables, reduce the volume of the connected equipment – only then should the PSU be switched off. Disconnect the cables. When disconnecting a cable, always pull only on the connector housing and not the cable itself. When the microphone is not in use it should put away so that dust does not accumulate.
Page 6 Powering: Via the included powering unit with 115/230 VAC Maximum Sound Pressure Level: 128 dB Connector: Large-sized Tuchel, 6 pin Dimensions: 240 mm (9.45'') 63 mm (2.48'') Shipping Weight: Approx. 12 Ibs. Included Accessories CM7, Power Supply EF14 tube, connection cable Shock mount Quarter-sawn oak case...