TrendsAudio BA-10 Bi-amp Audio System User Manual
Page 6
Trends BA-10 Bi-amp User Guide
Section 6 Technical Notes / Section 7 Hints & Tips
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PA-10(1 Output) Bias Setting
1.
Use screwdriver to take out the two upper level screws in the front panel &
another two screws in the back panel. Then, open the upper case.
2.
Power ON the machine with no audio signal input.
3.
Wait at least 5 minutes for the machine to run in.
4.
Use the multi-meter to detect the DC voltage between the test point A(L) [red] in
the PCB & the GND [black] (e.g. the ring of the power switch or the outer ring of
those RCA sockets) of the LEFT channel.
5.
Turn the screw on the top of the R5 of PA-10.1D or R3 of PA-10 potentiometer
by a small screwdriver clockwise or anticlockwise until the voltage as close as to
+16.5V.
6.
Then, repeat step 4 and 5 for the RIGHT channel by changing the test point to
A(R) [red] and turning the screw on the top of the R6 of PA-10.1D or R13 of
PA-10 potentiometer.
7.
Power OFF the amplifier.
8.
Cover back the upper case and tighten the screws.
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Use cloth glove or baggie to hold the tubes, wipe off any fingerprints on glass
portion of tube with a soft cloth. Fingerprints can lead to premature tube failure
l
Try not put excess force on the glass of the tube this can (rarely) cause the seal
between the glass and base to leak the vacuum.
l
Do not leave Trends BA-10 Bi-amp Audio System unattended for long lengths of
time during the 22 hour initial burn-in
l
The sound of Trends BA-10 will open up after about 5 minutes of warm-up. At
least half an hour of warm-up, if you are doing some audiophile listening
l
Always wait at least 5 minutes prior to turning Trends BA-10 back on after
turning it off.
Trends BA-10 Bi-amp User Guide
Section 8 Specification
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8.1 Specification of the Pre Amplifier Unit
Model
PA-10
PA-10.1D
Vacuum Tube
6DJ8/6922 series or 12AU7 series (exchangeable)
Standard Edition: Chinese 6N11 Tube
SE Edition: Russian 6H23n
GE Edition: USA 12AU7 Tube
Output Stage
MOSFET x 2
Amplification Gain
x3 (for Audio CD/DAC IN)
x6 (for Audio PC/iPod IN)
Signal-to-Noise Ratio
(SNR)
92dB
Dynamic Range
92dB
THD+Noise
0.05% @ 10k ohm
0.15% @ 33 ohm
Input
Two
Audio CD/DAC IN RCA
(Left/Right) x 1 [3Vpp max.]
AND
Audio PC/iPod IN RCA
(Left/Right) x 1 [0.55Vpp max.]
Power Socket(5.5mm/2.1mm)
x 1
Single(switchable)
Audio CD/DAC IN RCA
(Left/Right) x 1 [3Vpp max.]
Or
Audio PC/iPod IN RCA
(Left/Right) x 1 [0.55Vpp max.]
Power Socket(5.5mm/2.1mm)
x 1
Output
Audio OUT RCA(Left/Right) x
1
Headphone OUT (3.5mm) x 1
Audio OUT RCA(Left/Right) x
2
Headphone OUT (3.5mm) x 1
Other Switch & Knob
Audio IN selection switch x 1Power ON/OFF switch x 1
Power Indicator (Blue LED under Tube Socket) x1
Volume Knob x 1
Power Supply
DC 24V-26.5V (max.)
Dimensions(DxWxH) 114mm x 76mm x 46mm[case only]/145mm[incl.sockets &
knob]
Front Panel
1.5mm
4mm
System Package
Trends Combo & Bi-amp
BA-10 Bi-amp
Weight
380g
400g
Remark
Provide all functions of Tube Headphone Amplifier