Jas-Audio BRAVO 2.3 User Manual

OWNER’S MANUAL

JAS Bravo 2.3

Vacuum Tube

Single-Ended Class A

Integrated Amplifier

NOTE: Before installing your new Bravo 2.3 audio amplifier, please read this
manual carefully. I t will inform you of the product specifications and also proper
installation and operation procedures.

For additional requests
If you have any additional questions regarding the installation
or operation of our products, you are welcome to contact us directly via
email: “ [e-mail] “, and please check frequently our JAS Audio
official website: “ http://www.jas-a udio.co m “.

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JAS AUDIO HIGH FIDELITY

Welcome to JAS Audio Family! This JAS Bravo 2.3 integrated amplifier is designed

and manufactured to the highest quality standards. The design

exemplifies performance, elegance, and simplicity. You will find this tube amplifier

visually pleasing and easy to use without going through pages of instructions.

IMPORTANT: before operating the unit, make sure that you are familiar with the safety

measures documented below.

Bravo 2.3 OWNER’S MANUAL

Introduction

Single-Ended Class A Integrated Amplifier

Thank you for purchasing the JAS Audio Bravo 2.3 Integrated Amplifier. Standing on the

chassis immediate in front of the transformer casing are two 5AR4 rectifier tubes. On either

ends of the front row are 6C33 drive stage tubes separated by two 6J4P input stage tubes in

the middle. The transformer cage and the tube platform on the chassis are both overlaid with

hand finished solid wooden board engraved with scripts of Bravo and a thick acyclic sheet

engraved with tube notations and other indications respectively. The decorations and

indications are intended to put an appearance of stylish and elegance in front of audience.

Made of aluminum alloy, the front panel of 8mm in thickness is also a representation of

coherence in design of making the chassis robust and the electronics working with

durability.

6C33

5AR4

6J4P

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Preliminary

The front panel of Bravo 2.3 features a step-less negative feedback knob that regulates

amount of signal feedback in music playing for meeting individual preferences. Signal input

to 4 sets of RCA female plugs is selectable by the selector on the right of the panel. Power

switch is located on the left of the panel.

Negative feedback knob Selector

It is important to be careful with tube installation. Please do not force
anything, easy does it! This precaution is mentioned to help you
obtain pleasing results and avoid damage! If you have any trouble
replacing or changing tubes, please don’t hesitate to call your dealer!

Tube Replacement

Caution: Make sure the amplifier has been unplugged for 30 minutes from the AC

mains before replacing the tubes. This is to avoid any risk of shock or discomfort from

high temperature. Although tube life span varies depending on the nature and degree of

use, the 6C33 output tubes and the 6J4P driver tubes should last years in the Bravo 2.3

under normal home use.

Cautionary Terms

When the following cautionary terms are used in this manual, these

definitions apply:

Electrical hazard! Misuse or failure to follow instructions properly
may result in personal injury or death!

CAUTION: No risk of personal injury; however, misuse or failure to
follow instructions may result in damage to equipment.

NOTE: No risk of personal injury or equipment damage; however,
misuse or failure to follow instructions may prevent proper
performance

NOS types of 6C33, 6J4P, 5AR4 tubes will work fine in the JAS Bravo 2.3 amplifier.
The amplifier voltage settings will also work fine with all compatible types.

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