(ground)
Sleeve
Tip
a HA543.
phone Output of
into the Headnever be plugged
jack and should
This is a MONO
105 dB SPL at 1 hour
95 dB SPL at 4 hours
WARNING
110 dB SPL at 1/2 hour
100 dB SPL at 2 hours
(ground)
Sleeve
Tip
115 dB SPL at 15 minutes
Ring
120 dB SPL - avoid or damage may occur
USE AS LOW A VOLUME AS POSSIBLE
PERMANENT HEARING DAMAGE.
Outputs.
Headphone
with the HA543
is compatible
stereo jack that
This is a TRS or
phone Outputs THE HA543 WILL BE PERMANENTLY DAMAGED
would be shorted to ground. Never plug a mono plug into any of the Headputs on the HA543 will cause permanent damage to the unit because one side
CAUTION: Plugging a mono 1/4” or 1/8” TS plug into the Headphone Out-
damage occurs. 90 dB SPL at 8 hours
Administration (OSHA) on maximum time exposure to sound pressure levels before hearing
levels. Please use the following guidelines established by the Occupational Safety Health
In order to use this system safely, avoid prolonged listening at excessive sound pressure
USING THIS PRODUCT AT EXCESSIVE VOLUMES CAN CAUSE
OHMS. THE MAXIMUM HEADPHONE IMPEDANCE IS 600 OHMS.
WARNING: THE MINIMUM HEADPHONE IMPEDANCE FOR THE HA543 IS 8
we care about your hearing.
The warning section of the manual. Boring, but hey
6 - Enjoy your music.
experince.
5 - Use the “enhance” switch to get the desired listening
phones the RCA out is always active.
is still active. The “mute” switch will only mute the headthe same time. When using the headphone the RCA “out”
phone”. You can use eigther the 1/8” or 1/4” jack or both at
4 - Connect your headphones to the jack, marked “headpreamp out).
your other equipment (this is also called a pass thru or
3 - Optional: Connect the RCA out to
cause damage.
some repair work done. Reversed polarity adapters will
adapter, or the unit might not be happy and you would need
jack labeled “POWER.” Do not use any other
2 - Connect the supplied PS27s adapter to the
jack or XLR jacks.
1 - Connect your source to the HA543’s “in” RCA
quality music.
built in Salt Lake City, Utah by people who care about high
do and we’re happy to help. All Bellari products are hand
in your love of quality music and sound. We love what we
ate the opportunity to build a product for you and participate
ing to your vinyl collection rewarding. We sincerely apprecihope you enjoy using the HA543, and that it makes listenHundreds of hours listening and improving the design. We
able amount of time designing and developing the HA543.
Thank you for purchasing the HA543. We spent a consider-
What's in the box?
1 - Made in USA HA543
1 - 15V power supply PN PS27s
1 - This owners manual
1 - Love for great audio
Salt Lake City, UT
11/18
HA543 Headphone Amplier
SPECIFICATIONS
Input Impedance: 10K Ohms unbalanced - 20K Balanced
Max Input Level: +14 dBV
Input Connectors: RCA, XLR balanced
Outputs: 1: 1/4" TRS Stereo jacks
1: 1/8" (3.5 mm) TRS Stereo jacks
Max Gain: 20 dB
Output Power: 326 mW/side, 652 mW/Channel (62 Ohms)
Frequency Response: 3 Hz - 59 kHz +/- 3 db
S/N Ratio: 92 dB
THD: <.008%
IMD: <.008%
Phase Shift (In to Out): less than 10 deg.
Slew Rate: 2 V per microsecond
Crosstalk: - 75 dB
Power VDC (Power Supply Included)
Weight: 1 lb
Size: 4.5” x 1.5” x 3”
Headphone impedance: 8 Ohms to 600 Ohms
Connection guide
in
right in left in
out
power
HA543
The Enhance takes low quaility headphones that
are not very fun to listen to, and makes them much
more entertaing to the listener. Switch in is active
(it will be obvious) when out the HA543 is 100%
completely at.
Headphone output’s
1/4” Stereo, and
1/8” stereo jack’s for
connection to stereo
headphones. Can be
used at the same time.
Mutes both
headphone
jacks when in
headphone
headphone amplifier
Mute
Adjusts the
level of signal
sent to the
headphones
Volume
MADE IN USA
Enhance
Hard wired power
switch. When out the
connection from the
power adapter is completely disconected.
Power LED.
Power
HA543
Power input is 9-15
VDC for connection to the external
Rolls PS27s power
adapter.
HA543
power
right in left in
Ballanced XLR line level
inputs for connection to
a source with ballanced
outputs. When a signal is
present on the XLR’s signal
is sent to the RCA out’s.
out
Stereo RCA output used
as a pass thru so you
can use the HA543 as a
headpne amp and still
send the main signal out
to other equipment.
in
RCA stereo jack for
connection to a line
level source such
as a DAC, phone
output, CD player or
computer, etc.
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