Mapletree Sugarmaple Octal Duo User Manual Download Page 1 | Manualshive

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Octal Duo Stereo Headphone Amplifier

Users' Manual

Rev Oct. 12/14

Mapletree Audio Design

Al Freundorfer

R. R. 1, Seeley's Bay, Ontario, Canada, K0H 2N0

(613) 3873830

www.mapletreeaudio.com

[email protected]

©

Copyright Al Freundorfer 2014

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Summary of Contents for Sugarmaple Octal Duo

Page 1: ...eadphone Amplifier Users Manual Rev Oct 12 14 Mapletree Audio Design Al Freundorfer R R 1 Seeley s Bay Ontario Canada K0H 2N0 613 387 3830 www mapletreeaudio com info mapletreeaudio com Copyright Al F...

Page 2: ...are if necessary If the fuse blows a second time you should not try to operate the unit Contact Mapletree Audio Design for information regarding service The power supply is connected to the amplifier...

Page 3: ...to warm up the heater before switching on heater Switch off last LED Heater Power Indicator High Voltage On Switch Switch on second After both heater switch and high voltage switch are on the OD300 i...

Page 4: ...f several hours may be needed to achieve the best sonic performance Tube life should be thousands of hours Aging tubes may result in a reduced gain in one or both channels or an increase in noise leve...

Page 5: ...but excluding shipping is free within the warranty period Additional Notes This manual is an aid to the user for the operation of the OD300 Details of the amplifier and power supply circuits are subje...

Page 6: ...y response at 0 2 Vrms HiZ output into 32 Ohms headphone load 10 100 1000 10000 100000 0 1 2 3 4 5 6 7 8 9 10 Right Left Frequency Hz Gain dB Maximum undistorted HiZ output at 1 kHz Po max Rload 1 4 W...

Page 7: ...mpedance at 1 kHz LoZ 1 1 and HiZ 2 1 Input impedance 50 k Hum and noise at output less than 3 V rms 120 dB below max output Recommended load impedance 16 600 Phase non inverting Power consumption 90...

Page 8: ...MAD OD300 Headphone Amplifier Version 5c Copyright Al P Freundorfer 2014 Rev October 2014 7...

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