Eden Valvetech VT-300A User manual

Valvetech VT-300A

All Tube Bass Guitar Amplifier

Users Manual

EDEN

The Standard in BassSound

Draft Copy: 1-20-2000

Congratulations on your purchase of this unique all tube amplifier. The VT-

300 was designed for those who love the great vintage tone and gentle

acoustic color of the old tube amplifiers. This is a hand crafted amplifier

built with modern construction techniques and reliable printed circuits by

people who care about sound and quality.

Thank you for choosing Eden. Please take the time to read this manual and

to send in your warranty card.

CAUTION

To reduce the risk of electrical shock, do not expose this unit to rain or

moisture. Do not defeat the ground or polarization of the power plug. Do not

operate the unit near sources of excessive heat. Do not obstruct the

ventilation openings.

Your ears are your most important piece of equipment. Unfortunately, they

cannot be replaced as easily as your other gear. Please take the following

warning seriously.

This product, when used in conjunction with a sound source and

loudspeakers or headphones, may be capable of producing sound levels that

could cause permanent hearing loss. DO NOT operate at high volume levels

or at a level that is uncomfortable. DO NOT place your ears next to the

speakers. If you experience any discomfort or ringing in the ears or suspect

hearing loss, you should consult a health care professional.

Please complete for your records

Date of purchase:______________________

Model:______________________________

Serial Number:________________________

Dealer:______________________________

Front Panel Features

Input Jacks

Designed to accept a standard ¼” mono phone plug. The Passive jack is for

use with low output Basses and passive Basses. The active jack is for higher

output Basses with active electronics.

Overdrive Control

This switch shifts the amplifier into an ultra hi gain mode, suitable for a

wide range of sound textures from clean to fat and all the way to saturated.

With exact control through out the entire range. This works in conjunction

with the gain control. The higher the gain control is set the more distortion

can be generated. This function is also on the foot switch.

Gain Control

This sets the channel gain for the system and lets you match the output level

of your instrument to the amplifier. In the overload mode the gain control

setting determines the amount of overload available.

Multi Q Equalizer

The Multi Q Equalizer circuit uses a four band parametric E.Q.. It has preset

centers, and fixed Qs or bandwidths that vary with center frequency. This is

a very user friendly set up. You can tune in your sound in very quickly

using this simple system. The center frequency spacing follows the natural

content of the music and fits with the instrument very well.

Master Tone Controls

The Master Bass and Treble controls are provided for very fast E.Q. of the

system. They also combine with the Multi Q for even more tone shading.

These are Hi Fi type shelving filters and effect a broad range of tone.

Master Level Control

This controls the final drive to the amplifier. Use this to control your stage

level. About mid point on the control should be normal for most playing

situations.

Compressor Active light

This indicates the activity of the compressor. When the LED lights up the

compressor is functioning.

Compressor/Limiter On/Off switch

This is located on the back panel of the original series and on the foot switch

in the (A) series currently in production.

This turns the Compressor limiter on and off to he final output stage of the

amplifier.

Damping Selector

This unique feature is on the foot switch of the current (A) model. It allows

the amplifier to be very flexible. In the low setting you get normal vacuum

tube damping response. That is an open round soft low end that works well

with 4 string Basses and traditional tones. In the hi position you get a tighter

more defined sound suitable for slapping and more modern playing styles.

Standby

This switch sets the amplifier in the standby mode. The filaments stay

powered up but the hi voltage to the output tubes is removed so that they can

not operate. This extends the life of the tube and allows for less stress during

start up and power down.

Mains On/Off

This turns the main power to the amplifier on and off.

Back Panel Features

AC Power Inlet

This is the main AC connection point. It is an IEC type inlet and also serves

as the fuse carrier. Replace the fuse only with the same type and size as the

original.

FX Loop

This loop is located post the tone controls and sit just prior to the amplifier

input.

Tuner Output

This provides a full time output for connection to a tuner.

Direct Recording Output

The direct recording output is fully balanced and has the ground lifted as the

standard configuration. It is configured for both pre and post tone with the

provided switch. The output level can be adjusted with the level control

positioned next to the pre/post switch.

Speaker Impedance Selector

This switch should be selected to match the impedance of the enclosure.

Note: This should be done with the Amplifier turned off.

Speaker Output Connectors

Connect the loudspeaker here. Connect the speaker before turning on the

amplifier. Do not disconnect the speaker while the power is on.

Cooling System

This unit uses a continuous flow cooling system that is always in operation

when the power is on to the amplifier.

Output Tubes

Your unit comes from the factory set up and fully run in for 6550 type

output tubes. Optional EL-34 outputs can also be fitted to your unit. This

requires that the bias be reset to match the selected tube type. Replacement

tubes that match your output tubes are available from the factory. Look up

the number on you output tubes and ask- for the same code number. You can

generally replace on or two numerically matched tubes without re-biasing

the amplifier. A full replacement set should always be re-biased by a

qualified technician. Good quality matched output tubes will have better

output power and longer service life than a poorly matched set will have.

Service

If you have a question about the operation of your unit, or a service problem

with your unit please call us at the factory () or at technical support (847-

949-0444) and we will be happy to help you.

Your unit has a two year warranty with the exception of the tubes. The tubes

are warranted for 90 days from date of purchase.

Eden Electronics Inc.

P. O. Box 338

310 first St.

Montrose, MN 55363

612-675-3650

612-675-3651 fax

eden@eden-electronics.com

http://www.eden-electronics.com

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