Manley Labs Langevin Dual Vocal Combo instruction

REPLACING FUSES & METER LAMPS

1	2
A	B
	B

Changing the fuse is easy and can be done without any tools and while the DVC is still in a rack.

1)Disconnect the IEC AC mains for safety

2)Rotate the fuse cap anti-clockwise 1/4 turn

3)Remove the fuse and replace it with a new 1 AMP, 250 VOLT, AGC1 type fuse

4)Reconnect the IEC AC mains, turn on the power and meter lamps should once again glow.

If the new fuse also blows, it means there is probably a problem in the Dual Vocal Combo that needs fixing. Fuses are meant to blow in those situations to protect against further damage including fire and the unpleasant smell of transformer meltdown. The DVC will need to be sent to the dealer or factory for service.

Changing the meter lamps is pretty easy. These are simple incandescent bulbs chosen for long life but eventually they will fail. They are always available from Manley Labs but most electronic stores will also have them (Radio Shack part number 272-1143) and are described as "Midget Screw-Base Lamps", 12 Volts @ 75 mA.

1)Disconnect the IEC AC mains for safety

2)Remove the two small Phillips head screws located at the back which hold the perforated top cover in place. Slide the cover towards the back to remove it.

A) Locate the meters at the front panel and the two brass nuts on the back which holds a small printed circuit board to the back of the meters. These are 3/32 nuts which must be loosened and removed to gain access to the bulbs. The small board should slide back and will present the bulb in its socket.

B) Unscrew the light bulbs anti-clockwise (how many ________ does it take to unscrew a light bulb?) and screw in the new ones clockwise.

C) Replace the small printed circuit board to the back of the meters and re-attach the small brass nuts. These should be reasonably tight for good electrical contact but not forced to the point that the meter is damaged or the small screws on the meter become stripped.

D) Replace the top cover and the two screws that hold it in place, then re-connect the IEC AC mains plug and turn on the power to check out the new bulbs.

There are no other parts expected to age that are user servicable. Electrolytic Capacitors should probably be replaced after 10 years in audio gear and some say ICs, transistors and pots should be replaced in 20 years to keep the unit in optimum condition. This is a general guide for audio gear that is intended to be used for decades. On the other hand, you can expect to throw away most digital gear after 5 years because in 3 years new stuff does 10 times more and costs 10 times less. Funny how that stuff ages and fine analog keeps being used for decades. In 1999 64 megs of memory costs about $100 and is 8 chips on 1 module. In 1974 it took 150,000 chips and cost $3 million bucks and now its worth is nothing. Good Analog is a long term thing.

Langevin Dual Vocal Combo specifications

The Manley Labs Langevin Dual Vocal Combo is a premium vocal processing unit that combines vintage warmth with cutting-edge technology. Designed for both professional recording studios and home setups, this unit stands out with its ability to enhance vocal tracks dramatically while preserving their natural character.

One of the standout features of the Dual Vocal Combo is its dual-channel architecture, which allows engineers to process two vocal signals simultaneously. This is particularly useful when recording duets or layering harmonies. Each channel is equipped with a dedicated mic preamp, providing individual control over gain, EQ, and compression, thus offering flexibility for different vocal styles and recording environments.

The mic preamps in the Langevin Dual Vocal Combo are renowned for their low-noise performance and ability to handle high sound pressures without distortion. With high-quality discrete components, the preamps deliver a warm, rich tone that enhances the clarity and presence of vocals. The unit also incorporates a high-pass filter to eliminate unwanted low-end rumble, which helps to focus the vocal sound in the mix.

Another significant feature is the built-in optical compressors. These compressors are designed to provide smooth, transparent dynamic control, allowing for a more polished final sound. The optical design ensures that the compression is musical and responsive, providing the ability to gently tame peaks without squashing the dynamics of the performance.

The EQ section of the Dual Vocal Combo comprises four bands of equalization, with both boost and cut capabilities. This flexibility enables engineers to sculpt their vocal tracks precisely, enhancing desired frequencies while reducing any harsh elements. The frequency selections cover the full vocal range, making it versatile for various vocal tones.

The Dual Vocal Combo also features an intuitive user interface, making it easy to navigate adjustments. Its robust construction ensures durability, suitable for constant use in a studio environment. With the signature Manley design aesthetics, it adds a touch of professionalism to any recording setup.

In conclusion, the Manley Labs Langevin Dual Vocal Combo is an exceptional choice for vocal processing. With its dual preamps, high-quality compression, extensive EQ options, and user-friendly design, it caters to the needs of both amateur and seasoned professionals looking to elevate their vocal recordings. Whether for tracking, mixing, or live performance, this unit proves to be an invaluable asset in any audio arsenal.