Detailed
description
Wider
and deeper.
The
amazing 700W SPECTRUM bass amp is legendary!
It's heart is a highly dynamic preamp that accommodates
active, passive, acoustic and electric instruments
with equal ease. The massive power stage offers
twice as much power than an SVT but can go quieter
than a Champ because of Power Scaling technology.
But even a legend must sometimes end. Or change...
We
kept the preamp the same. The front-end is still
the variable gain block bass players have come to
expect in the SPECTRUM line. You can plug
in an acoustic instrument with a raw piezo pick-up
and capture the full frequency response. You can
plug in any electric with high or low output pick-ups,
or one loaded with active circuitry, and get a loud
clean signal. The DRIVE
control varies the gain of the front-end so you
can set it up for pristine clean, mild compression,
or heavy over-drive. Passive three-way EQ with
HIGH,
MID and LOW
controls provide a familiar feel and easy tuning
of your sound. The LOUD
control taps as much of this signal as you need,
passing it to the reverb loop and another gain stage.
Our
proprietary all-tube push-pull reverb driver and
full-length Accutronics delay line produces very
clean, smooth reverb sounds. A bit like old tube
reverbs. A bit like digital reverbs. Modern yet
nostalgic without boinging. Cool. The reverb loop
is a complete "side-chain", which means none of
its gain stages are in the dry signal path. This
keeps noise to an absolute minimum.
The
gain stage after the reverb loop is free-running,
so it lends a traditional tube warmth to the sound.
Depending on how the LOUD
control is set, this stage will be running totally
clean or as distorted as some modern bass styles
demand. Regardless, you can tap into all of this
tube's touch response without overdriving the output
stage - unless you want to! The LIMIT
control keeps the power amp in check.
Recent
advances in our guitar amp line have spilled over
into the bass products. The special output stage
configuration has now been adopted for use in the
50W SPECTRUM. Rock-solid tone with unique
tube dynamics.
In
the 50W model, your choice of output tube is nearly
unlimited. For a British sound, throw in some EL34s.
For a North American sound, try some 6L6s. For a
bigger sound, try 6550s or KT88s. For a sweet Tweed
sound, try mixing in 6V6s. While you're at it, try
mixing any of these tubes in any combination to
create unique sounds. This is possible because the
SPECTRUM has individual bias adjusts for each output
tube, and a wide enough bias range for any of the
tube types listed, just like every other LONDON
POWER guitar amp.
Amazing
power tube versatility. That alone
gets you more sounds than most amps out there. With
LONDON POWER's Power Scaling technology,
you can dial the output power down to milliwatts
for maxed-out crunch at whisper levels. Power Scaling
delivers, where speaker attenuators and load boxes
fail. Recording and gigging has never been so easy.
Modelling amps simply cannot match the tonal range
and feel of a real tube amp.
Power
Scaling lets you get all those cranked stack sounds
without complaints from the neighbours! And, you
can choose to dial up power tube distortion all
on its own for a cranked non-master-volume amp sound,
or combine that with the huge range of preamp textures
for the most singing sounds around. The LIMIT
control keeps the amount of power tube distortion
in check- you never get more than you need regardless
of how low the Power Scale dial is set. You can
access both the "fast" sound of fixed-bias and the
"round" tones of cathode-bias at the flick of a
switch. And maybe you wish you could just "dial
in warmth". You can with the BODY
control, which lets you sweep from loud, clean push-pull
power to warm and cozy single-ended tones. The SPECTRUM
offers the modern bass player previously unimagined
ranges of tone and power! Retro-mania to Futurama
at the flip of a dial.
Our
custom wide-band Hammond output transformer surrounds
you with incredibly deep lows and scintillating
highs. The special output configuration tolerates
a wide range of load impedances, so you can connect
any speaker cabinet to any of the direct-impedance
jacks that sounds best. Go ahead: hook up any cabinet
or combination of speakers and just play.
Early
preamp over-drive. Late preamp over-drive. Output
stage over-drive. Or any combination. And any compression
level from any point, too. Plus - this is ALL-TUBE.
No hybrid trickery.
Where
did the active EQ go? They are no longer needed.
The new SPECTRUM amps have so much feel and
dynamic response that actual players can use, they
don't need things that appeal to side-line spec
readers. How about an effects loop? Again, real
players rarely use them. Another fad from the eighties.
Besides, it would interfere with the internal gain
architecture and some depth of tone would be sacrificed.
That was not a compromise we wanted to make.
With
all the "latest greatest" 400W amps out these days,
where will a 50W be of any use? Our 50W SPECTRUM
driving a pair of our SESSION 112 or SUPER
NOVA 212 cabinets produces far more on-stage bass
sound than most sound men will tolerate. Our cabinets
are more efficient and much more toneful. And our
SPECTRUM has way more feel. Power Scaling
makes the SPECTRUM the Ultimate recording amp!
If
you really need more power, check out our SUPER
SCALER models. The SUPER SCALER v700 uses
the same 4CX250 power tubes the legendary SPECTRUM
700 used. Half the size of a 6L6 but capable of
outputting over 800W per pair. Utter reliability,
as witnessed by their aviation and military uses in
radars and transmitters in tanks, ships, planes, and
anywhere microphonics or failure could not be tolerated.
The
SPECTRUM integrated amps are built like our
other head-style amps, in a steel Hammond chassis,
with venilated cover and wooden ends with flip-uphandles.
A custom ToroidTech toroidal power transformer with
dual primaries assures world-wide mains compatibility.
Our custom Hammond output transformer, PEC sealed
military pots and Switchcraft open-frame jacks are
all chassis mounted. Solen polypropylene filter
caps, Wima and Philips signal caps, metal-film and
flame-proof metal-oxide resistors mounted on Teflon
circuit cards are hand-wired for a lifetime of service.
The usual Twenty Year Warranty applies to everything
except the tubes and reverb tank.