Thank you very much for purchasing the Otomatsu amplifier kit.
Please read this manual carefully prior to commencing assembling
the amplifier kit. Ensure to pay attention in preventing any
accidental electrical shock.
Table of Contents
1. Introduction and Circuit overview
2. Assembling Headphone amplifier module. 2 sets
3. Assembling the Balance drive module
4. Assembling the Power supply module
5. Case set
6. Assembling the case and cover modules
7. Assembling the back panel
8. Attaching together modules to the case
9. Wiring the power supply
10. Wiring signal path -1,
-2
11. Checking all wiring
12. Checking the voltage level of key areas
13. Modification of Headphone cable
14. Improvement options
How to Assemble the Balanced Headphone Amplifier Kit BDR-HPA01E
(Estimated assembly time: 10 hours)
otomatsu
If you have any technical question, please contact: [email protected]
Input Stereo RCA un-balance line signal
Output
Stereo XLR Balance x1. or Un-balance 1/4inch phone x2
Or capable to drive XLR input Power Amplifiers
Frequency Response
5Hz
-80kHz
Total Harmonic Dist Noise
0.0046
％
@40Ω load 1kHz
Output power 1600mW x2 max. @40Ω load
Headphone impedance matching 16Ω
- 300Ω
Power supply
AC100V – 120V 50-60Hz
Size
W230mm x D180mm x H50mm
o t o m a t s u
Both of XLR and 1/4inch Phone jack are supported by the Combo
jack. In the case of 1/4inch phone jack, the AMP drive has a
single-end, and supports two headphones
.
1
Rev.1.0 E All Copy Right Reserved by otomatsu
