For those who are reluctant to work with vacuum tubes, and high voltages associated with them, we designed a low voltage transistor headphone amplifier kit Brig® (User Manual). Brig® is a high end pure class A DIY transistor headphone amplifier kit designed for the highest quality music reproduction with the minimum distortion. An essential part of any good sounding headphones is the amplifier that is driving them. Brig® is capable of driving a wide range of headphones from 30 Ohm Grado to 300 Ohm Schennheiser and it will give you the best advantage in listening pleasure. Do not compare this amplifier to the ones made somewhere in Asia from counterfeit parts and using Wal-Mart switching power supplies. Brig® uses only the finest audiophile quality components that have been carefully selected with no expense spared. Brig® uses two LME49710HA audio amplifiers for their linearity and ultra low distortion. High quality WIMA and Nichicon capacitors are used along with an audio grade ALPS volume potentiometer. Military grade Vishay/Dale metal film resistors used throughout the kit. A high quality built in dual bus power supply Janus® with ultra low noise characteristics delivers +12 Volt and -12 Volt voltages and almost 10,000 microfarads of post and pre regulation smoothing capacitance provided by Nichicon and WIMA capacitors. The kit is assembled on a Canadian made printed circuit board that has thickness of 1.75 millimeters and 2 Oz copper traces. Brig® uses 229A16 transformer manufactured by Hammond Manufacturing Corp. and is designed for both 120V and 240V power arrangements.
Headphone transistor amplifier Brig® is shipped the same business day it is purchased via Canada Post Express with a tracking number.
Headphone transistor amplifier Brig® is also available as assembled, tested and operating headphone amplifier. Contact us if you wish us assemble headphone transistor amplifier Brig® for you.
User Manual
Specifications of Single End Pure Class A OTL Headphone Amplifier Brig®
Frequency Response: 10Hz - 250 KHz (-1dB)
Headphone Impedance Range: 30 Ohm - 600 Ohm
Input Impedance: 100 KOhm
Output Impedance: 55 Ohm
Total Harmonic Distortion: < 0.001%@1KHz
Power Consumption: 1.2 W@12 Volt
Signal to noise ratio: 103 dBa
Crosstalk between left and right channels: - 92 dB
Maximum Output Power vs. Impudence:
150 mW@30 Ohm
250 mW@60 Ohm
200 mW@100 Ohm
150 mW@250 Ohm
100 mW@300 Ohm
80 mW@350 Ohm
Component Selection of Single End Pure Class A OTL Headphone Amplifier Kit Brig®
Amplifiers: Two LME49710HA
Volume Potentiometer: ALPS RK27 also known as Blue Velvet
Resistors: Vishay/Dale Metal Film
Input Coupling Capacitors: WIMA 1 Microfarad
Output Coupling Capacitors: WIMA 1 Microfarad
Decoupling Capacitors: WIMA 0.1 Microfarad, Nichicon 100 Microfarad
Feedback Grounding Capacitors: Nichicon Muse Audio Grade 100 Microfarad
PSU Pre-Regulator Capacitors: Three Nichicon 1000 Microfarad and One WIMA 1 Microfarad
PSU Post-Regulator Capacitors: One Nichicon 4700 Microfarad and One WIMA 1 Microfarad
PSU Pre-Regulator Capacitors (Filament): Three Nichicon 1000 Microfarad and One Kemet 0.22 Microfarad
PSU Voltage Regulator +12 Volt: LM2940CT-12
PSU Voltage Regulator -12 Volt: L7912CP
