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BHA-1OWNER’S MANUAL
IMPORTANT SAFETY INSTRUCTIONSThe lightning flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of un-insulated “dangerous voltage “ within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
1. Read these instructions.2. Keep these instructions.3. Heed all warnings.4. Follow all instructions.5. Do not use this apparatus near water.6. Clean only with dry cloth.7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding
type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the appa-ratus.
11. Only use attachments/accessories specified by the manufacturer.12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used use
caution when moving the cart/apparatus combination to avoid injury from tip-over.13. Unplug this apparatus during lightning storms or when unused for long periods of time.14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-
supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.DO NOT EXPOSE THIS EQUIPMENT TO DRIPPING OR SPLASHING AND ENSURE THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, ARE PLACED ON THE EQUIPMENT.TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM THE AC MAINS, DISCONNECT THE POWER SUPPLY CORD PLUG FROM THE AC RECEPTACLE.THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN READILY OPERABLE.
BRYSTON LIMITED WARRANTYBryston analog audio products are warranted to be free from manufacturing defects for twenty (20) years from the original date of manufacture. The warranty includes parts and labour.Bryston Digital products and cables are warranted for five years from the original date of manufacture. The warranty includes parts and labour. Bryston products having motorized moving parts, excluding motorized volume controls, are warranted for three years from the original date of manufacture. The warranty includes parts and labour. Bryston will remedy the problem by repair or replacement, as we deem necessary, to restore the product to full performance. Bryston will pay return shipping costs for the full length of the specific product’s warranty.In the event of a defect or malfunction, contact Bryston’s repair centers for return authorization. Products must be returned using original packaging material only. Packing material may be purchased from Bryston if necessary. This warranty is considered void if the defect, malfunction or failure of the product or any component part was caused by damage (not resulting from a defect or malfunction) or abuse while in the possession of the customer. Tampering by persons other than factory authorized service personnel or failure to fully comply with Bryston operating instructions voids the warranty. This warranty gives you specific legal rights and you may also have other rights which may vary from province to province and country to country.As of 2006-02-22 Bryston will only warranty Bryston products purchased through authorized Bryston dealers. Bryston products with a date code of 0608 or higher (date code format is “yyww”, where “yy” is the two least significant digits of the year and “ww” is the week of the year) must be accompanied by a copy of the bill-of-sale from a Bryston authorized dealer to qualify for warranty service. The warranty is transferable from the original owner to a subsequent owner as long as a copy of the bill-of-sale from the original authorized Bryston dealer accompanies the re-sale. The copy of the bill of sale to any subsequent owner need ONLY include the Name of the Bryston Authorized Dealer and the Model and Serial number of the Bryston product The warranty will only be honored in the country of the original purchase unless otherwise pre-authorized by Bryston.
Postal address: P.O. BOX 2170, Stn. Main PETERBOROUGH, ONTARIO CANADA K9J 7Y4Courier address: 677 NEAL DRIVE PETERBOROUGH, ONTARIO CANADA K9J 6X7
PHONE: 705-742-5325FAX: 705-742-0882E-mail: [email protected]
79 COVENTRY ST., Suite 5NEWPORT, VERMONTU.S.A. 05855-2100
PHONE: 802-334-1201FAX: 802-334-6658E-mail: [email protected]
BRYSTON SERVICE in CANADA: BRYSTON SERVICE in the USA:
contact your local distributor or
CHECK OUR WEB SITE: www.bryston.com E-MAIL BRYSTON DIRECTLY: [email protected] BRYSTON DIRECTLY: 01-705-742-0882PHONE BRYSTON DIRECTLY: 01-705-742-5325
BRYSTON SERVICE outside Canada and the USA:
TABLE of CONTENTS
Safety Instructions, Warranty and Contact Information ...........OppositeGeneral Information ................................................................. Page 1
Introduction General Description Installation & Setup Power Conditioners XLR Connector Options Fuses Driving Multiple Pairs of Headphones ........................................Page 2
Wiring Headphones for Balanced OperationFront Panel Legend ......................................................................Page 3 Input Select Switch Gain Select Switch Volume Control Balance Control Balanced Outputs Single Ended Output Status LED ...............................................................................Page 4 Power SwitchRear Panel Legends Power Inlet Fuse Drawer Fuse Label & Warnings Remote Trigger Connector Mini Jack Input ........................................................................Page 5 Single-Ended Inputs Balanced Inputs Data PlateConnecting the BHA-1 to the MPS-2 External PSURemote Trigger (Power On/Off) Control .....................................Page 6
TechnicalSpecificationsOverall Schematic .......................................................................Page 7
External Dimensions .................................................................. Page 8
BHA-1 HEADPHONE AMPLIFIER
INTRODUCTION: Thank you for choosing the Bryston BHA-1 Head Phone Amplifier. We welcome any suggestions you may have, or comments regarding the opera-tion of your amplifier. We consider you, our cus-tomer, to be Bryston’s’ most important resource, and your opinion is very much appreciated. No warranty card is necessary to initiate your cover-age. Refer to the back page for detailed warranty information. Please save the original box and all packing materials. Always use the original pack-ing materials when shipping or moving the BHA-1.
GENERAL DESCRIPTION:The BHA-1 is a stereo headphone amplifier that features: ● Balanced dual mono circuitry ● High quality laser trimmed Noble stereo
Volume control ● Left/Right balance control ● 6 fully discrete class A Bryston opera-
tional amplifiers ● Balanced outputs: 4 pin stereo and dual
left/right 3 pin outputs ● Stereo ¼ inch single ended outputs ● 14dB or 20dB of selectable gain available ● All input and output connectors are Gold
plated ● 10k input impedance ● Multiple headphone drive capability ● Power supply options: Standard: high quality Bryston inter-
nal analog power supply Optional: External MPS-2 power
supply (replaces internal supply)
INSTALLATION & SETUP:Check the label next to the power input con-nector on the rear of the BHA-1 and verify your amplifier complies to your local A/C volt-age and frequency requirements. The BHA-1 is a convection cooled amplifier. The entire enclosure, and the aluminum top in particu-lar, acts as a large surround heat sink helping to transfer heat to the surrounding air. Therefore the BHA-1 installation should allow for unrestricted air flow around it. We recommend maintain-ing at least 3 inches of clear space to the sides and top of the amplifier. The BHA-1 should not be installed near other heat sources like heat-ing vents or radiators. The BHA-1 should not be
installed in tight enclosed areas. Bryston recommends that at least 6 inches of space be provided to the rear of the amplifier for properly dressing input, output and power cables.
POWER CONDITIONERS:Bryston urges caution in choosing a power condi-tioner for your audio/video system. Large power amplifiers can draw very substantial current from the wall plug, and many so-called power condi-tioners can in fact hinder the supply of current by inserting resistances in series with the line cord. However, there are now power condition-ers that can reduce or eliminate RF and ‘hash’ from the AC supply and may actually improve current delivery to your system. This type of power conditioner (exemplified by Bryston B.I.T. Power Conditioners) uses the energy storage in a large toroidal transformer to provide high instan-taneous power and reduce the substantial AC output resistance of the wall socket and house wiring. This resistance can be in the range of 0.5 to 1 Ohm and is typically reduced to only a few milli-ohms by the Power Conditioner. That in turn considerably reduces Voltage drop in the power line on high current surges and quite substantially increases the stability of the power line improving audio (and video) focus, precision and clarity.
XLR CONNECTOR OPTIONS:Although the pictures and illustrations in this manual show all female non-locking connectors, all XLR connectors are available with locking mechanisms on a special order basis. Also, the XLR output connectors on the front panel are available in either gender (male or female).
FUSE:The BHA-1 has a single, fast acting 5x20mm tubular glass fuse, located in a locking drawer that is integrated into the power inlet (see pg’s 6 & 7). Turn off the unit and remove the power cord before attempting to remove and replace the fuse. Replace fuse with the type and value stated on the fuse label. In the event of a descrepency, follow the data on the fuse label. For 100-120VAC models: F 2A/250VFor 200-240VAC models: F 1A/250V
BHA-1 HEADPHONE AMPLIFIER
DRIVING MULTIPLE PAIRS OF HEADPHONESWhile the BHA-1 is capable of driving multiple pairs of headphones from its three outputs (single 4 pin XLR jack, dual 3 pin XLR jacks and 1/4” stereo phone jack) the total power delivered should be less than or equal to the rated output power in order to maintian optimum performance. While more power can be delivered, this will cause the class A amplifier stages to run hotter and performance may suffer. The inter-nal heat generated is primarily determined by the power delivered to the load(s). Unfortunately there is no easy way to determine in advance how much power headphones would be using as this would require knowing not only the load impedances but also the output voltage levels and that is determined by listen-ing levels in conjunction with the headphones’ effeciency. Note that the three outputs are in parallel being driven from the same output amplifiers. Also, though we recommend that the load impedance be greater than 32 Ohms it can be a low as 16 Ohms.
To connect multiple pairs of unbalanced headpones DO NOT use the balanced output jacks as this could damage the BHA-1. Each half of either balanced output is driven from a separate amplifier in a bridged configuration (for a total of 4 output amplifiers) and thus there is no common ground. Unbalanced (also refered to as single ended) headphones should only be connected to the unbalanced output connector (a 1/4” 3-conductor phone jack on the front panel). A suitable “Y” adaptor to facilitate driving two unbal-anced headphones from the unbalanced output jack to is shown below. This is a typical “Y” adaptor and should be readily available.
WIRING HEADPHONES FOR BALANCED OPERATION
For headphones that have a separate pair of wires (+ and - phase) from each side, maximum per-formance can be obtained by wiring these head-phones for fully balanced operation where there is no common or shared ground. The BHA-1 provides two different connector op-tions for balanced operation:1) Using a single 4 pin XLR connector (e.g. Neu-
trik NC4MC-B), the left driver is connected as follows:
LEFT+ → pin 1 RIGHT+ → pin 3 LEFT– → pin 2 RIGHT– → pin 42) Using two 3 pin XLR plugs (e.g. Neutrik NC3MX-B) wire the two connectors as follows: LEFT connector + → pin 2 RIGHT connector + → pin 2 LEFT connector – → pin 3 RIGHT connector – → pin 3
BHA-1 REAR & FRONT PANEL LEGENDS
FRONT PANEL1: INPUT SELECT SWITCH Select between Balanced (XLR 3 pin female),
RCA (unbalanced or single-ended) and MINI (3.5mm TRS or 3 conductor mini Phone jack)
2: GAIN SELECT SWITCH Select between LOW (14dB decibels, (gain =
5) or HIGH (20 decibels, gain = 10)
3: VOLUME CONTROL
4: BALANCE CONTROL With centre detent.
5: BALANCED OUTPUTS
Using two 3 pin XLR jacks, one for the left channel output and another for the right chan-nel output. Pin 1 is ground, pin 2 is the posi-tive phase and pin 3 is the negative phase. See page 5 and 6 for more wiring details.
6: BALANCED OUTPUT (4 PIN XLR) This 4 pin XLR jack is wired in parallel to the
dual 3 pin XLR jacks (see above), therefore do not use both the dual 3 pin XLR’s and the single 4 pin XLR output at the same time.
Pin 1 = Left + Pin 3 = Right + Pin 2 = Left – Pin 4 = Right –
7: SINGLE ENDED OUTPUT Quarter inch stereo phone jack, also referred
to as a ¼ inch TRS (Tip-Ring-Sleeve) connec-
BHA-1 HEADPHONE AMPLIFIER
tor, or a 3 conductor ¼ inch phone jack. This single ended or unbalanced output uses only one of two output stages and therefore deliv-ers only half the available power.
TIP = Left channel RING = Right channel, SLEEVE = ground (or common)
8: STATUS LED LED lights green when the BHA-1 is turned
ON. When the BHA-1 with the external pow-er supply option is properly connected to an MPS-2 external power supply & the MPS-2 is turned ON but the BHA-1 is turned OFF, the LED will light red to indicate that external pow-er is available.
9: POWER SWITCH The UP position is ON and the DOWN position
is OFF. There is no standby mode in the BHA-1. However, when the power switch is OFF it is still possible to turn the unit on via the Remote Trigger Input on the rear panel (se Rear Panel, item 11 and also Remote Turn On on page 5)
REAR PANEL10: FUSE DRAWER Turn off unit and disconnect power cord
before attempting to replace the fuse. Re-place the fuse only with the same type and value as stated on the fuse label on the rear panel next to the fuse drawer/power inlet module.
11: IEC 60320-C14 POWER INLET Mates with C13 power cord connector.
12: FUSE LABEL & WARNINGS. Follow all warnings and cautions.
13: REMOTE TRIGGER INPUT When the power switch (item #9) is turned off
(down) the unit can still be powered on by ap-plying 12 volts DC at 50mA, across the two TRIGGER INPUT pins. A two position mating screw terminal connector (Bryston part num-ber CO-110A-11102) is included with each unit. (see next page for hookup details)
14: STEREO MINI-JACK INPUT A 3.5mm 3 conductor gold plated phone jack for
connecting any audio analog audio source like MP3 players, etc. Corresponds to the “MINI” position of the input selector switch (item #1).
15: SINGLE ENDED INPUTS
One pair of RCA jacks, gold plated, for connect-ing line level analog audio inputs
16: BALANCED INPUTS 3 pin female XLR jacks, gold plated, for con-
necting balanced analog audio input signals the BHA-1.
Pin 1 = ground Pin 2 = positive phase Pin 3 = negative phase
17: BALANCED OUTPUTS 3 pin male XLR jacks, gold plated, for connect-
ing balanced analog audio signals to the inputs of other compatible equipment.
18: DATA PLATE LABEL Lists the model name, electrical ratings, se-
rial number, manufacturing date code (yyww, where the first two digits represent the two least significant digits of the year, and the last two digits represent the week of the year).
CONNECTING Special Order BHA1-X HEADPHONE AMP to the MPS2 POWER SUPPLYThe BHA-1 is available without an internal power supply on a special order basis. These models require a Bryston MPS-2 external power supply and an interconnecting cable as shown below. The required cable as-sembly is Bryston part number 101175. Becuase of the higher power consumption of the BHA-1, compared to the power requirements of preamps the MPS-2 is normally paired with, two of the MPS-2’s four outputs must be used to power a single BHA-1.When the MPS-2 is properly connected to the BHA-1 and the MPS-2 is turned on but the BHA-1 is turned off, the BHA-1’s front panel status indicator LED will light red. This indicates that power is available to the BHA-1. Once the BHA-1 is turned on, either by the front panel On/Off switch or remotely by via the Remote Trigger connection, the LED will light green.
BHA-1 HEADPHONE AMPLIFIER
REMOTE TRIGGER HOOKUPWhen the front panel power switch (item #9) is turned off (down) the unit can still be powered on by ap-plying 12 volts DC at 50mA, across the two TRIGGER INPUT pins. Because the Remote Trigger Input is rectified and regulated the polarity of the this input voltage doesn’t matter. The Trigger voltage can be supplied form any safe external source. A two position mating screw terminal connector (Bryston part number CO-110A-11102) is included with each unit. Do not over tighten the terminal set screws as this can actually cause the connection to loosen over time. Maximum torque is 4.5 inch-pounds (0.5Nm). Stranded copper wire between 24 and 18 AWG is recommended. Strip 1/4” of insulation off the end of the wires to be connected to the CO-110A-11102. The wire ends should be bare copper; not tinned.
The Remote trigger input is non-polarized so either output wire can go to either input pin.
Tighten wires with no more than 0.5Nm torque
BHA-1 SPECIFICATIONS
POWER OUTPUT: Maximum: 2 Watts per channel into 32 Ohms at 1% THD (continuous) Rated: 500 milliwatts per channel into 32 Ohms at .005% THD.INPUT IMPEDANCE: 10K ohms single ended (unbalanced) +15K/-5K ohms double ended (balanced) SENSITIVITY: HI (approx 20 dB) setting: 70mVin = 100 mWout into 50 ohms (500mVin = 5Vout) LO (approx 14 dB) setting: 140mVin = 100 mWout into 50 ohms (500mVin = 2.5Vout)
DISTORTION: THD+noise: < 0.005% 20 Hz to 20 kHz IMD: < 0.001% 60 Hz + 7 kHz mixed 4:1 NOISE: Measured with input shorted (20 Hz to 20 kHz.) >103 dBv (with 20 Hz to 22 kHz band pass filter)FREQUENCY RESPONSE: 20 Hz to 20 kHz @ ± 0.1 dB.POWER BANDWIDTH: <1 Hz to over 100 kHz POWER CONSUMPTION: 50 Watts HEAT LOAD: 130 BTU/hr DIMENSIONS: Maximum overall dimensions with C-series front panel & feet: 17” dress panel: 2.713” high & 11.1” deep (432mm • 69mm • 282mm) 19” dress panel: 2.713” high & 11.1” deep (483mm • 69mm • 282mm)
Maximum overall dimensions with Rack mount panel & feet: 19” wide, 2.45” high & 11.1” deep (483mm • 62.2mm • 282mm) Maximum overall dimensions with Rack mount panel but without feet: 19” wide, 2.45” high & 11.1” deep (483mm • 62.2mm • 282mm (See page 8 for more details)
WEIGHT: unit alone: 11.7 lbs (5.3 kg) approx. with packaging 16.5 lbs (7.5kg) approx.
BHA-1 OVERALL SCHEMATIC
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LTD
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ON. CANADA K9J 7Y4PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
Date :
File : Sheet : of Rev :
Drawn :
Title : BHP1 - HEADPHONES AMPLIFIER
SEPT 2012 ST
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B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
-20B
+20B
+
5C7
47u
+
2C747u
+
4C7
47u
+
6C9
47u
+4C
947
u
+20D +20F
+20C+20E
-20D -20F
-20E-20C
-20A
+20A
4RM
10K
0
3OUT
4OUT 6OUT
5OUT
R3R49R9
R6R49R9
J8T
J8R
J8S
2R7
499R
3_A
2_A
5H1
1560-OB
5H2
1560-OB
5H3
1560-OB
FU1
FIDUCIAL
5H5
1560-OB
5H6
1560-OB
5H7
1560-OB
5H8
1560-OB
5H9
1560-OD
3R17
10R
03R
H4K
75
6RB1K0
4RF
4K75
4RH
4K75
2_B
3_B
5H11
1560-OD
5H12
1560-OD
LEFT
VBB
BA
L
R1L4K99
C1L270p
C1R 270p
R1R4K99
R249K9
3CF
100p
4CF
100p
LD5S1G
LD2S1G
LD3S1G
RIG
HT
VBA
BA
L
4R14
5R11
4Q11 M
JD24
34R
155R
11
4Q12
MJD
253
3R14
5R11
3R15
5R11
3Q11 M
JD24
33Q
12M
JD25
3
6R14
5R11
6R15
5R11
6Q11 M
JD24
36Q
12M
JD25
35R
145R
115R
155R
11
5Q11 M
JD24
35Q
12M
JD25
3
1
2
3
4
5
6
7
8
9
5J6
G
acac
+-
5BR3
RG100R
CHASSIS
PG1
EXT PWR UP
5J7
RL4B
RL4A
RL4C
LD1S1G
LD4S1G
FU2
FIDUCIAL
FU3
FIDUCIAL
PCBPCB5
BHA1 MB R8
GND ISO
OPAMPS SUPPLIES
RELAYS SUPPLY
PWRUP MUTE
5P6
LD6S1G
4D3
4Q7100
4Q8200
4R11
499R
6Q7100
6Q8200
6D3
6R11
499R
5Q7100
5Q8200
5D2
5R11
499R
3D3
3Q8200
3R11
499R
3Q7100
5R6
10K0
6R7
10K
0
6C14100p
6R6
10K
0
6C13100p6C
E10
0p
G
6R17
10R
0
6CA
680p
4R7
10K
0
4C14100p
4R6
10K
0
4C13100p
4CE100p
G
4R17
10R
0
4CA680p
5D35R
710
K0
5C13
100p
5C14100p
G
5CE
100p
G
3CE
100p
3R6
10K
03R
710
K0
3C13100p
3C14100p
G
G 3RF
4K75
3CA680p
3C11100N
G
3C10100N
G
4C11100N
G
4C10100N
G
5C11100N
G
5C10100N
G
6C11
100N
G
6C10100N
G
5R17
10R
0
5CA
680p
+
+
4C154700u
+
+6C154700u
+
+
5C154700u+
+
3C154700u
FU4
FIDUCIAL
G
INPUT BUFFERS POWER OP AMPS
QR1MJE15031
QR2 MJE15030
DR2
DR1
+VB
-VB
+VA
-VA
+VA
-VA
+VA
-VA
+VA
-VA
+VB
-VB
+VB
-VB
+VB
-VB
RR1
1K5
RR2
1K5
+
CG
+ CK+
CR1022u
+CR922u
CR12100N
CR11100N
QR3MJE15031
QR4 MJE15030
DR4
DR3
RR3
1K5
RR4 1K5
+
CB
2200u
+
CE
2200u
+
CC
+
CF
+
CH
2200u
+ CL
2200u
+
CJ
+ CM
RCAMINI
BAL
HI
LOW
GAIN
INPUTS
G
5R20
2R00
G
3R20
2R00
G
3RM
10K
0
G
G
5RM10K
0
4R20
2R00
G
6R20
2R00
G
6RM
10K
0
G
RL5C
RL5A
RL5B
RL6A
RL6B
RL6C
G
5P4
+
-AC
AC
5BR1
+
5CR22u
L0UT+
L0UT-
R0UT-
R0UT+
1 2 3BIAS3
1 2 3
BIAS4
1 2 3
BIAS6
1 2 3
BIAS5
FU5
FIDUCIAL
5J8
5J9
R11R49R9
R12R49R9
L0UT+
L0UT-
R0UT-
R0UT+
R11L49R9
R12L49R9
RV
L20
K0
RV
R20
K0
Bias Adjustcold - set to 100mv - place cover on
1/2 hour - readjust to 250mv cover on
bias
adj
bias
adj
bias
adj
bias
adj
3CH
100p
4CH
100p
5QB MJD44
5QA MJD45
5RA24K99
5IC1
5RA44K99
5RA11K0
5RA31K0 ON
5R10
500R
6R10
500R
+12V
-V
G
+V
V-
G
G
LBW
LVW
RVW
RBW
LBH
RBH
T
T2
T
T3
T
T4
V+
V-
T
90C THERMAL SWITCHES
T1 5QC100
5RT2K61
G5L
WGY1GRN/YL
V+
G
G
G
JM10R0
5CM
1000
p
6CM
1000p
4CM
1000
p3C
M
1000
p
JM20R0
4R10
500R
4RL2B
4RL1A
PCBPCB4 BHA1 MPS2 PSW R7
4RL2C
4RL2A
4RL1B
4RL1C12V4
ON4
4VR50K
4H190008
MPS2 ONLY
4H390008
4H290008
4H490008
4RJ
1K50
4QAPN100
G4
4RE
4K99
4RK1K0
G4L
4EXT+
4EXT-
RG
4LE
D
G4
4SW PWR
4RR
20K
0
4P2
5RJ
1K0
LD7S1G
R349K9
QF2100
LD8S1G
LOGO
BHA-1 HEADPHONE AMPLIFIER
BHA-1 EXTERNAL DIMENSIONS
There are no user serviceable parts inside the BHA-1. Please refer any servicing to qualified personnel.300028-6-bha1-20130219 BRYSTON LTD., PETERBOROUGH, ONTARIO, CANADA
