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One Control BJF-S66 Amp

Excellent condition, 8/10, price brand new is
4999SEK (about 500USD), more specs: Think of this
as the best sounding American amp you have ever
played. At any volume. And you can keep it in your
gig bag.It sounds ridiculous but please, come by
us and play it. Many a wise guitarist has
discovered that the amplifier can be the most
important and significant part of the entire tonal
chain in determining the overall quality of guitar
sound. A well-known guitar tone connoisseur once
sat in on a jam session that was hosted by another
tone-fiend player, and observed that the host was
playing a Squier Stratocaster, while he himself
had a beautiful vintage Stratocaster with the
original pickups and electronics. However, the
hosting player also had an amazing sounding 1966
amplifier that was made in Fullerton California
with the legendary blackface graphics and 40
watts of tone through 4x10 speakers. Our
vintage-snob player friend soon discovered that
his guitar (worth $10,000 more than his friends
humble Squier model) made very little difference
plugged into the blackface amplifier.The One
Control BJF-S66 is the very first all solid-state
design by amp guru Bjorn Juhl from BJFe. Bjorn has
crafted and designed amplifiers for famous players
and studio cats all over the world, but his
hand-made amplifiers have been at a price point
that has put them out of reach of all but the most
well-heeled guitarists. While many purists will
not consider a solid-state based amplifier design,
Bjorn has never been beholden to any specific
design philosophy that is tied to parts as mojo
components, instead always using the functions of
various parts to suit his design rather than
letting the parts dictate the sound.One discrete
all analog signal path preamp that is configured
as two switchable channels, each with reverb level
and decay. The reverb can be set up per channel,
along with a fully switchable effects loop and
tremolo that can be assigned via intelligent
footswitch to either channel. Up to 100 watts of
output power depending on load impedance. And tone
from the mind of one of the most prolific boutique
amplifier and effects designers of the past three
decades. Tone that stays consistently amazing no
matter where the master volume is set, making
everyone from your soundman to your landlord
happy.For this first One Control guitar amplifier,
Bjorn has selected the black faced amplifier from
1966 with built in reverb & trem from
Fullerton California as his tonal palette. This
amp is legendary for being a great plug n play
amplifier, as well as a fantastic pedal platform
for those guitarists who like to have a lot of
tonal variety at their feet. With modern design
and build techniques, this new amplifier is small
and light enough to fit into a gig bag, yet robust
enough to handle nearly any gig you can bring it
to. Congratulate yourself on selecting one of the
best amplifiers one can find on the market today,
designed by one of the most meticulous analog
electronics gurus on the face of the earth. The
One Control BJF-S66 is yours.Specifications:Power
requirements: Included switching mode supply works
worldwide with any input voltage higher than 40
Volts.Input impedance: 1 MegOhmPower Output: 66
watts into 8 Ohms, 100 watts into 4 Ohms.Effects
Loop Send and Return: Switchable with footswitch
which can remember what channel or both it is
assigned to.EQ: Common to both channels.Bass: 70Hz
+-20dBMid: 450Hz +- 10dBTreble: 2KHz +-20dBBright
switch: +10dB at 4KHz - Bright switch is tuned to
avoid tinnitus- inducing trebleChannel Switching:
Channels are switchable via footswitch, and each
channel has dedicated reverb controls for level
and decay.Rhythm Channel has Gain and Master and
Reverb Level and Reverb Decay.Lead channel has
Gain and Master and Reverb Level and Reverb
Decay.Tremolo has depth and speed controls and is
switchable via footswitch and can be assigned to
either channel or both or manually switched
on/off.The footswitch draws power from the
amplifier and contains a memory of last
setting.Power amp is a Class D design and is
highly power efficient.Reverb is a digital BJF
design.Preamp is a discrete solid state all analog
signal path for pure tone. Bjorns Take:Welcome to
my newest amplifier, the One Control BJF-S66.The
amplifiers that influenced the design for this amp
are the classic mid 60 s high powered tube amps.
This allows playing feel to be set comfortably at
any volume and distortion to be set at any volume.
Tremolo is placed after reverb to allow tremolo to
modulate the reverb tail. The tremolo modulation
has been designed to be close to perfect sine for
an even sounding hypnotic effect. This means that
if the sound of this amp is mostly inspired by
black amplifiers of the 60 s, the tremolo sound is
more similar to brown amplifiers of the 50 s.The
Preamp and Power amp stages each replicate circuit
responses that occur in a tube amplifier. The
functions in real tube amps take into account the
small distortions that that are almost
imperceptible as distortion by the human ear, and
the onset of distortion is set gradually -
increasing in the same way as similar amp with
tube amplifiers. For the channel switching, I have
made a departure from standard designs - I thought
long and hard about hardwiring the gain for rhythm
so it would be on max when in Lead mode but
something useful is to set the rhythm gain at 6
and then switch channels so you can have about the
same sound plus you can set the output level of
each channel with respective master volume as well
as set two independent reverb levels. The channel
footswitch changes the master volume and kicks in
the lead boost and selects channel reverb
controls. For musicians, the amp is pretty
straight forward with the exception that some
would expect to have dedicated gain controls; but
once you look deeper into possible use of the
amplifier, it makes sense.The OC BJF-S66 was
originally designed to work with the Eminence
Allessandro Speaker, because this speaker provides
Twang*, and as speakers are half the sound, this
is to give it the correct vintage EQ and partly
the playing feel. That said, the BJF-S66 amplifier
can work with most any speaker, though the exact
intended vintage feel will not be quite as
prominent. Note that the output power is about 66
watts into 8 Ohms and 100 watts into 4 Ohms and a
mere 30 watts into 16 Ohms, so output behaves like
a solid state power amp. NEVER short-circuit
output or damage will occur! But you can leave the
output disconnected and use the preamp via the
effects loop send jack for direct recording or to
drive other signal chains. (On tube amps: NEVER
leave the output open!)Premier Guitar Magazine
published an article by me entitled A Mad
Professor Speaks on Speakers. This is the article
that I quoted to support the choice of the
Allessandro speaker which is a really fantastic
speaker, making it a breeze to design an amp
backwards from speaker to input.About speaker
choices - the BJF-S66 can absolutely use a number
of speakers although it should be remembered that
speakers are half of your sound. For instance, the
BJF-S66 sounds excellent with a Celestion Vintage
30, which is likely the world s most common
speaker. Soundwise, this will make the amp sound
more like Mike Landau s signature Fender Hot Rod
Deluxe than a vintage 60 s blackface model.The
BJF-S66 amp is a bold move forward into whether
transistors can be made to sound like tubes.I
profess to say that if the desired functions can
be defined, then these functions can be created
and then one must first answer what is desirable
to the ear. The BJF-S66 draws functions from an
array of amplifiers of the mid 60 s isolating
functions that have been desirable, including the
sounds produced after aging components and much
more as it also draws influences from sounds
produced only at certain power levels. This amp is
therefore also an entry in the debate whether
great sounds can only be obtained at very loud
levels. I profess to say that if the desired
functions can be defined, then the feel can be
replicated; but to be really true, the speaker
cone must be able to move. However, that would
make it possible to get playing feel allegedly
only obtainable at 100W s at 1W.Though this amp is
made to do vintage sounds, it has many modern
features to make life easier for musicians. The
range of controls have been defined to both be
familiar to musicians but also intuitive to
musicians(* twang as a sound quality is a certain
protruding upper midrange)Note: BJF-S66 has so far
replaced both a JCM 900 half-stack and a Twin
Reverb on a major stage where both the musician
felt better AND the soundman felt it easier to get
a great sound, with the audience enjoying the
overall sound of the band more.

Price: SEK 3500

For more purchase information, please
contact Oscar at oscar@oscarguitars.se

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