BRYSTON SST
PERF ORMA NCE DRIVEN
10 B ELECTRONIC CROSSOVER
Bryston’s Model 10B Electronic Crossover combines ideal
signal-handling with an enormously flexible control function.
Simple, direct front-panel switches allow any crossover curve
to be set instantly, and the signal purity is always maintained.
The Model 10B features independently selectable crossover
points for high-pass and low-pass, in case the speaker installation
requires slightly overlapped, (or slightly staggered), response
curves f or the drivers. You can also independently select
crossover slope, from 6, 12, or 18dB/Oct., where one driver
requires raster cutoff than another in the same system.
MODEL 10B LR
The 10B-LR, a fixed frequency plug in Linkwitz-Riley
alignment with steep roll off curves of 24 dB/Oct. is
also available.
frequencies more suitable to sub-woofer applications and a
10B standard which is more applicable to speakers reacquiring
frequency control in the midband and tweeter areas.
All crossover selections are extremely accurate and repeatable,
being implemented with 1% selected metal-film resistors
and polystyrene capacitors. All switches are heavily gold-
plated, for lifetime protection from corrosion. The level-
controls are precise 1dB increments, also derived f rom
gold-plated switches and 1% metal-film resistors. Most
important, however, is that the Bryston 10B Crossover uses
NO integrated circuits in the signal path. All internal buffer
and amplification stages are Bryston’s exceedingly linear and
superbly quiet discrete op-amp circuitry. This means the
signal is always maintained as “Audiophile Quality”, with
stability and freedom from noise and distortion unapproached
in other crossovers.
The crossover may be used in any of three connections: 2-way
stereo, 3-way mono, and a special configuration, 2-way stereo with
summed low pass out to allow the use of one sub-woofer. The
10B is available in two stock versions, a 10B sub incorporating
From the point of view of adaptability, flexibility and signal
integrity, the Bryston 10B Electronic Crossover is the ideal choice
for the widest range of multi-way speaker installations.
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10B SWITCHING AND CONNECTIONS
(B) (C) (D ) (E) (F) (A) (G) (H) (A) (B) (C) (D ) (E) (F) (A)
(I) (J) (K) (L) (K) (J) (I)
(A) MUT E SWI TCH
One each for low pass and high pass filters
(B) LOW PASS FREQUENCY SELECTOR
12 selectable crossover points
(C) LOW PASS SLOPE SELECTOR
Sets low pass slope in decibels per octave
(6, 12 or 18dB/Oct.)
(D) HIGH PASS LEVEL CONT ROL
Sets high pass output level for channel.
-5dB to + 5dB in 1dB steps.
(E) HIGH PASS SLOP E SELECTOR
Sets high pass slope in decibels per octave
(6, 12 or 18dB/Oct.)
Selectable
frequencies
10B standard
70 Hz, 100 Hz, 140 Hz, 200 Hz,
300 Hz, 450 Hz, 700 Hz, 1 kHz,
2 kHz, 3 kHz, 4.5 kHz
Selectable 40 Hz, 50 Hz, 60 Hz, 70 Hz,
frequencies* 80 Hz, 90 Hz, 100 Hz, 200 Hz,
10B sub 250 Hz, 300 Hz, 400 Hz, 500 Hz
(F) HIGH PASS FREQ UENCY SELECTOR
12 selectable crossover points
(G) STATU S LEDS
(H) POWER SWI TCH (PUSH BUTTON)
(I) INPUT RCA OR XLR (FEMALE)
(J) LOW PASS OU TPU T RCA OR XLR (MALE)
(K) HIGH PASS OUTPU T RCA OR XLR (MALE)
(L) MODE SELECTOR SWI TCH
Features Stereo 2-way
Monaural 3-way
Stereo 2-way summed low pass
Balanced or unbalanced
Independent high and low pass
frequency selection
Slope 6/12/18 dB per Oct.
S/N ratio -90 dB
Distortion 0.005%
Input 15k ohms, unbalanced
impediance 15k ohms, balanced
Output 100 ohms
impediance
± 5dB gain on high pass section
Internal adjustments for up to ± 10 dB
Dimensions 19 or 17 x 1.75 x 10 inches,
48.25 or 43.18 x 4.44 x 25.4 cm
wt: 12 lbs, 5.5 kg
* Custom frequencies available on request
** 24 dB per octave with plug-in frequency modules also available
Balanced version also available
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POWERPAC SST MONAURAL AMPLIFIERS
The Bryston PowerPac Amplifiers are a modular monaural
version of our very popular stereo amplifiers but designed to
be utilized in applications where portability, sound quality
and flexibility are of prime importance.
The PowerPac Amplifiers are a perfect choice for use as a
portable power amplifier which can be attached directly to
the rear of your loudspeaker. This provides for the use of very
short speaker leads resulting in a much improved loudspeaker/
amplifier interface. The PowerPac Amplifiers can also be bolted
on the wall for utilization in audio/video surround systems
(left/right/center/rears/backs) where a non-conspicuous
power module is required. A further application would be in
multi-room audio systems where single or multiple amplifiers
are needed to provide music in adjacent rooms. Finally, with
the recent popularity in passively or actively amplifying the
individual drivers in your stereo loudspeakers the Bryston
PowerPac’s would be ideal for use in this capacity.
POWER PAC 60 ST MO NAURAL AMPLIFIER
The Bryston PowerPac 60-ST amplifier, is a no-compromise,
modular, single channel power amplifier delivering 60 watts at 8
Ohms, or 100 watts into 4 Ohms. The PowerPac 60 is a modular
monaural version of our very popular 2B-LP stereo amplifier
but designed to be utilized in applications where portability,
sound quality and flexibility are of prime importance.
VERSATILE FEATURES
• Allows direct attachment or adjacent placement
to loudspeakers.
• On-wall mounting.
• Easy application in any multiple driver active or passive
stereo system.
• Balanced or unbalanced operation at the flick of a switch.
• Gold plated 5-way banana jacks, RCA and XLR
connectors.
• Level control adjustment.
• Detachable power cord.
POWERPAC SPECIFICATIONS
SLEWING RATE
Greater than 60 volts per microsecond
POWER BANDWIDTH
Less than 1Hz to over 100kHz
POWERPAC 120 SST MONAURAL AMPLIF IER
The Bryston PowerPac 120-SST amplifier, is a superior quality,
modular, single channel power amplifier delivering 120 watts
at 8 Ohms, or 200 watts into 4 Ohms. The PowerPac 120-SST
is essentially a monaural version of our very popular 3B-SST
stereo amplifier but intended for use in applications where
portability and flexibility are of prime importance.
POWERPAC 300 SST MONAURAL AMPLIF IER
The Bryston PowerPac 300-SST amplifier, is a superior quality,
modular, single channel power amplifier delivering 300 watts
at 8 Ohms, or 400 watts into 4 Ohms. The PowerPac 300-SST
is essentially a monaural version of our very popular 4B-SST
stereo amplifier but intended for use in applications where
portability and flexibility are of prime importance.
DAMPING FACTOR
Over 500 at 20Hz, ref. 8 ohms
IMPEDANCE
50k unbalanced, 20k balanced
FEATURES
• Regulated power supplied to all voltage gain stages
• Gold plated input and output connectors
• Switchable balanced XLR -1/4” and RCA unbalanced inputs
• Remote power turn-on. 12 v AC/DC
• Power Clipping Indicator
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POWER PAC COMPARISON CHART
MODEL
POWERPAC
60 ST
POWERPAC
120 SST
POWERPAC
300 SST
WATTS DISTORTION NOISE INPUT SENSITIVITY
60 watts @ 8 ohms
100 watts @ 4 ohms
< 0.009% from 20Hz to
20kHz @ 60 watts
> 101dB below
full output
AND IMPEDANCE
.75V in for 60 watts out @ 8 ohms
50k unbalanced, 20k balanced
IM or THD
120 watts @ 8 ohms
200 watts @ 4 ohms
< 0.008% from 20Hz to
20kHz @ 1200 watts
> 104dB below
full output
1.0V in for 100 watts out @ 8 ohms
50k unbalanced, 20k balanced
IM or THD
300 watts @ 8 ohms
400 watts @ 4 ohms
< 0.007% from 20Hz to
20kHz @ 300 watts
IM or THD
> 106dB below
rated output
1V in for 100 watts @ 8 ohms
50 Kohms unbalanced
20 Kohms balanced
DIMENSIONS
12 x 1.8 x 7.1 inches
30.5 x 4.7 x 17.9 cm
wt: 5 lbs, 2.6 kg
12 x 3.6 x 7.25 inches
30.5 x 9 x 18.3 cm
wt: 10 lbs, 4.5 kg
17 x 8.4 x 4.5 inches
43 x 21 x 11.5 cm
wt: 24 lbs, 11 kg
POWERPAC 300 SST POWERPAC 120 SST
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POWERPAC 60 ST
BRYSTON INTERCONNECT CABLES
BRYSTON
ANALOG/ DIGITAL/VIDEO CABLE
We at Bryston, do not think cables should be ‘voiced’ to
sound a specific way. The best cable is NO cable at all so
we contend that the best cable is the cable that changes the
signal the least.
The geometry (where the plus is relative to the minus) of a
cable determines the inter-relationship between the measured
performance of a specific cable. These measured performance
criteria are call the ‘Primary Constants’. They are R-resistance,
L- inductance, C- shunt capacitance and G-shunt conductance.
You can play around with all types of exotic packaging and
add-on appendages you like but ultimately the measured
performance (primary constants) tell the tale.
COAX INTERCONNECT CABLES
An analogue Preamp/Amplifier connection is a ‘high impedance
interface’ therefore; you are looking for low measured
Capacitance. An interconnect cable acts like a capacitor in
the signal path so the better that capacitor the better the
interconnect. We use an interconnect wire with (very low
capacitance) and the RCA connectors are made for us in
Switzerland. The RCA cables ‘make and break ground’ first
and last when connecting and disconnecting. This prevents
ugly pops and bangs from going through your system with
the possible negative results.
DIGITAL CABLES
With ‘Digital’ interconnects things are a lot different. The
wavelengths of digital signals are ‘very short’ (same for FM) so
the lengths and terminations are much more critical than with
the analogue signals previously discussed. When the wavelength
of the signal the cable is used for approaches 1/30th of the
length of the cable then transmission line effects start to appear
and much more attention has to be paid to the connection
and termination. If not then reflections and cancellation of
data is a real possibility. For instance the AES/EBU digital
connection on the back of the Bryston SP2 should be used
with a cable having an impedance of 110 ohms.
VIDEO CABLES
Video cables also operate at very high frequencies - typically
5-6 MHz for Composite and S-Video and 8-30 MHz for
Component Video depending on the scan rate and resolution.
So again understanding the wavelengths of the signals and
interfaces involved is important.
XLR INTERCONNECT CABLES
The XLR cables we use are also very low in capacitance.
Actually the XLR cable we are currently using is in fact low
noise balanced microphone cable with 100% shield coverage
against RF. The advantage of Balanced XLR cables is that they
have a noise canceling effect know as ‘common mode noise
reduction’. This helps prevent noise and hum from affecting
your system. With today’s complexity of audio and video
surround systems this is a big plus, so if you ‘got em-use em’.
BALANCED XLR CABLE
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BRYSTON
BRYSTON SPEAKER CABLES
SPEAKER CABLES
The Amplifier/Speaker interface is a ‘low impedance’
connection. Therefore, in a speaker cable you are looking
for low ‘self inductance’ (because inductance rolls off the top
end) as opposed to ‘low capacitance’ required in the RCA
or XLR analogue interconnect. For speaker cables we use a
stranded 9 gauge linear crystal copper with ‘Heavily Gold
plated’ Spade lugs or Expandable Banana plugs specially
made for Bryston.
IN SUMMARY:
1. The connection should be of similar metals (preferably
gold) and be airtight. If not airtight it will break down
molecularly over time and begin to rectify or produce a
diode effect on the signal.
2. With all the RF floating around today the better
the ‘Shield’ on the interconnect the less
intrusive the RF will be.
3. The connection between
yo ur a nal ogue Sourc e
components (Preamplifier,
CD Player, Tuner, DVD
Player etc.) is a ‘High
Impedance’ connection
and the interface between
your power amplifier and
your speakers is a ‘Low
Impedance’ connection. So,
the requirements are totally
different for optimizing these
interfaces.
RECOMMENDATIONS:
Bryston highly recommends keeping the speaker wires as
short as possible and utilizing XLR balanced lines if available.
Given the choice of long interconnects and short speaker leads
or short interconnects and long speaker leads – choose long
interconnects (preferably Balanced) and short speaker leads.
With digital and video cables finding out the sending and
termination requirements is very important due to the very
short wavelengths relative to cable lengths involved.
BRYSTON
SPEAKER CABLE
BRYSTON
SPADE
4. Digital and Video cables are much more susceptible
to reflection/phase/cancellation problems because of their
short wavelengths relative to cable length.
As you can see from the above, no surprise that people hear
differences in cables when connected to the variety of equipment
in the market today. Given the differences in input and output
impedance’s between transistor and tube gear, the lack of
understanding of the high impedance and low impedance
interfaces, the world of RF, and the digital/video connection
issues no wonder we have these differences of opinion.
BRYSTON
BANANA
BRYSTON 5–YEAR CABLE WARRANTY
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BRYSTON WARRANTY
In a world where most things seem to need frequent
upgrading, repair, or replacement, how can Bryston offer
a comprehensive, unconditional, and fully transferable
warranty on every audio product we make?
The answer would quickly become apparent if you were
to tour Bryston’s plant in Peterborough, Ontario, Canada.
State-of-the-art design facilities, with the latest CAD and
circuit simulation software, and an inventory of some of the
best and most reliable parts on the planet, combine with
a manufacturing philosophy that eschews the artifacts of
mass production — robots, moving assembly lines, and,
frankly, shortcuts. Every Bryston audio component is
handcrafted by people who take great pride in building the
very best. Starting with a bare circuit board, for example,
each component is hand selected and installed, every wire
is cut and bent by hand, every connection is hand soldered.
On average, it takes thirty to thirty-five person-hours to
assemble a single Bryston product. Is this just some romantic
that could result in long-term reliability problems.
We don’t skimp on testing or rush our products through
some last-minute go/no-go check; at every stage individual
parts, completed circuit-boards, sub-assemblies, and final
assemblies are all put through rigorous inspection and testing
procedures. When completed, every Bryston amplifier
receives a comprehensive and carefully documented
test of all its functions, and the printed results of this
computer-aided analysis are actually packed and shipped
with each unit. During this intensive procedure, we not
only reject any product that falls outside of our advertised
specifications, but also any not meeting an even narrower
band of specifications that we use for internal testing. As a
result, you can expect each Bryston product to perform as
least twice as well as the advertised specifications.
Our 20-year amplifier and 5-year digital circuit warranty
drives us in a different direction f rom the typical
manufacturer. We consider a Bryston product to be a
19th-century notion of the artisan-craftsman, or is there a
real benefit to you, the consumer? There is. Take the hand
soldering, for example. We could do the job much faster by
employing wave-soldering machines as many companies
do. But that would mean exposing the entire circuit board
to a molten-metal bath, a source of extreme heat shock
Canada’s largest independent manufacturer
of high-end audio electronics for consumers and professionals
Founded 1962
Bryston Limited P.O. Box 2170, 677 Neal Drive, Peterborough,
Ontario, Canada K9J 7Y4 1-800-632-8217 bryston.ca
mutual investment: by you, in an amplifier of lasting
quality, and by us, in that we invest in the quality of the
product in order to be secure in offering our warranty. It
simply makes good economic sense to produce the very
best products we can.
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