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Table of Contents
The warning section of the manual. Boring, but
hey we care about your hearing and health.
WARNING
USING THIS PRODUCT AT EXCESSIVE VOLUMES CAN CAUSE
PERMANENT HEARING DAMAGE.
USE AS LOW A VOLUME AS POSSIBLE
In order to use this system safely, avoid prolonged listening at excessive sound pressure
levels. Please use the following guidelines established by the Occupational Safety Health
Administration (OSHA) on maximum time exposure to sound pressure levels before hearing
90 dB SPL at 8 hours
damage occurs.
95 dB SPL at 4 hours
100 dB SPL at 2 hours
105 dB SPL at 1 hour
110 dB SPL at 1/2 hour
115 dB SPL at 15 minutes
120 dB SPL - avoid or damage may occur
CAUTION:
Plugging a mono 1/4" or 1/8" TS plug into the Headphone Out-
puts on the HA540 will cause permanent damage to the unit because one side
would be shorted to ground. Never plug a mono plug into any of the Head-
phone Outputs THE HA540 WILL BE PERMANENTLY DAMAGED
This is a TRS or
Tip
stereo jack that
Ring
is compatible
with the HA540
Sleeve
Headphone
(ground)
Outputs.
WARNING:
THE MINIMUM HEADPHONE IMPEDANCE FOR THE
HA540 IS 8 OHMS. THE MAXIMUM HEADPHONE IMPEDANCE IS 2000
OHMS.
DO NOT OPEN THE HA540. REMOVING THE UNITS COVER COULD
POTENTIALLY DAMAGE THE UNIT OR CAUSE HARM TO UNQUALI-
FIED PERSONS. THE UNIT OPERATES AT +150 VOLTS INSIDE.
HIGH VOLTAGES EXIST INSIDE THE UNIT EVEN WHEN THE UNIT
IS NOT POWERED ON. ALL WARRANTIES ARE VOID IF ANY INTER-
NAL COMPONENTS ARE DAMAGED DUE TO USER ERROR.
This is a MONO
Tip
jack and should
never be plugged
into the Head-
Sleeve
phone Output of
(ground)
a HA540.
Salt Lake City, UT
12/18
HA540 MK2 Headphone Amp
Headphone
MADE IN USA
Input select
SPECIFICATIONS
Input Impedance:
47K ohms
Max Output Gain:
19.6 dB
THD:
0.04%, 20Hz-20KHz, at 1V RMS
S/N Ratio:
85 db, unweighted
Indicator:
1 Power LED
Max Output Power:
332 mW/side, 664 mW/Channel (30 Ohms)
Frequency Response:
6 Hz - 51 KHz +/- 3 db
Phase Shift (In to Out):
0 Deg.
Crosstalk:
-75 dB
Headphone impedance:
8 Ohms to 2000 Ohms
Input Connectors:
CH 1: RCA, 1/8" (3.5mm)Stereo; CH 2: RCA
Outputs:
1: 1/4" TRS Stereo jack
1: 1/8" (3.5 mm) TRS Stereo jack
PWR:
15 VDC 500mA
Size:
6"w x 2.5"h x 5.4"d
Weight:
2 lb.
Connection guide
HA540 MK2
Power
Volume
headphone amplifier
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Table of Contents
Related Manuals for Bellari HA540 MK2
Summary of Contents for Bellari HA540 MK2
-
Page 1: Connection Guide
WARNING USING THIS PRODUCT AT EXCESSIVE VOLUMES CAN CAUSE HA540 MK2 Headphone Amp PERMANENT HEARING DAMAGE. USE AS LOW A VOLUME AS POSSIBLE In order to use this system safely, avoid prolonged listening at excessive sound pressure levels. - Page 2 FAQ: Thank you for purchasing the HA540. We spent a consider- able amount of time designing and developing the HA540. Q:What is a N.O.S. tube? Hundreds of hours listening and improving the design. We N.O.S. refers to (new old stock) it is a tube that was man- hope you enjoy using the HA540, and that it makes listening ufactured long ago and never used.
- Page 3 Do tubes have a burn in time? BUZZING: Yes, in our testing new tubes need 30 to 50 hours to burn Your HA540 will buzz when you listen to headphones with in. The sound difference is very slight, but we recommend nothing plugged into the input selected.
- Page 4 When out the headphones. Can be connection from the used at the same time. power adapter is com- pletely disconnected. HA540 MK2 This switch Headphone selects between MADE IN USA Power Channel 1 and 2 Power LED.
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