Gt Sfx Mk2 Package

“
Stereo Field Expander Operator’s Guide
SFX
TM
Technology for an enhanced 300-degree stereo sound field experience
TM
Groove Tubes
Custom Shop
SFX Technology –
TM
TM
like hearing color in a
black-and-white world.
SFX ENCODING
E1
Electronic SFX Stereo Encoder
Congratulations!
SFX is the first and only way
play live with convincing stereo
You’re one of the first to experience
effects. Its ground-breaking
playing in the enhanced 300-degree
technology will forever change the
stereo sound field created by
rules for live stereo performances.
SFX Technology.
Pittman and Daniels
Your rack-mount
Research exclusively licensed
SFX Encoder, coupled
this technology to Fender
with an SFX Stereo
Musical Instruments
300o stereo
Decoder Speaker
Corporation in 1999. FMIC is
Cabinet, create whole
currently producing the
new stereo possibilities
SFX Stereo Technology
award-winning
for the live performer.
delivers an enhanced
Acoustasonic Amp which
300-degree sound field
is an “all-in-one” acousticfrom a special SFX Stereo
A brief history Decoder Speaker Cabinet – electric solution with
preamps, power amps,
of the SFX
producing sound so rich,
Digital Stereo Processing
Technology
vibrant and natural, the
source-point seems to
(DSP), and two speakers
emanate from everywhere
housed in a single combo
Aspen Pittman and
in live performances.
cabinet.
Drew Daniels coThe Acoustasonic Amp won
invented The SFX Stereo Technology,
Best New Amp at the Music and
which was recently awarded US
Sound Retailer Awards at the Los
patent 6219426-B1, and patents are
Angeles NAMM show, and the SFX
pending in several foreign countries
line won the coveted International
as well.
Press Award at the Frankfurt Musik
SFX Technology produces a
TM
stunning stereo image in live
performance – stunning because it
emanates from a single cabinet!
Groove Tubes
Custom Shop Products
and the SFX Stereo
product line
Groove Tubes has received Fender’s
blessing to produce a limited quantity
of SFX Stereo Technology systems for
those musicians who want SFX Stereo
but also want to keep their existing
tube amps and stereo effects
devices.
Our goal was to produce a
complete SFX Stereo system – an
electronic SFX Encoder, and a range
of SFX Stereo Decoder Speaker
Cabinets that would work with any
tube amp, tube preamp, stereo
effects unit and/or tube power amps.
We also designed special SFX
Stereo Decoding Speaker Cabinets for
keyboard instruments – the K1 and
K3 – because so many modern
keyboard samples are based upon
stereo patches, which are greatly
enhanced by the SFX Stereo
SFX DECODING
G3
SFX Stereo Decoder
Speaker Cabinet for guitar
K3
SFX Stereo Decoder
Speaker Cabinet for keyboards
Technology.
Messe in April 2000.
The E1 SFX Stereo
Encoder
Most everyone records using
stereophonic effects, but must
perform in mono. This is because
using stereo speakers widely spread
on stage will only produce stereo
results for the small number of
The E1 SFX Stereo Encoder converts
the stereo left-right signals from your
stereo effects device or keyboard into
special front-side signals for input to
listeners sitting in the center of the
audience. Moving the speakers
your stereo amplifier, which in turn
power any of our special SFX
towards each other produces a mono
result because the they mix together
within just a few feet.
GROOVE TUBES
The new Fender
Acoustasonic Amp
utilizes SFX Technology.
K1
SFX Stereo Decoder
Speaker Cabinet for keyboards
S12
SFX Stereo Decoder Satellite
Decoding Speaker Cabinets.
CUSTOM SHOP PRODUCTS
S15
SFX Stereo Decoder Satellite
3
Required
equipment
The E1 may be used for guitar, bass
or keyboard applications, while the
The SFX Encoder
“in-series” setup
1
Your instrument
SFX Decoder Speaker Cabinets are
specially designed for their
respective instruments.
The SFX E1 Encoder is placed in the
signal chain AFTER your stereo
either
the effects loop returns of both your
original amp top and your second
2
Your amplifiers
effects unit, and BEFORE your
amplifiers.
amp – OR to the inputs of your
stereo amp.
3
A stereo effects unit
The E1 provides either a
common series signal path or a
parallel signal path that allows for
Connect the preamp OR the
effects loop output (send) of your
4
An E1 SFX Encoder
mixing the dry/wet level of your
effects at the E1 instead of your
stereo effects device, thereby
preserving your preamps’ sonic and
1
4
amp top to the stereo effects
processor you have chosen.
Speaker Cabinet. Be sure the Front
signal amplifier is connected to the
SFX Decoder Speaker Cabinet’s
Note
Your preamp signal will enter your
stereo FX device as a mono signal,
Front input, and the Side signal
amplifier’s output to the SFX
Decoder Speaker Cabinet’s Side
and exit in stereo mode (left/right).
input. Also, be sure to set your
amp’s impedance selector (if
applicable) to the correct input
impedance of the SFX Decoder
Speaker Cabinet.
5
A SFX Decoding
Speaker Cabinet
Required cables
for setup
Depending upon whether
you choose “in-series” or
“in-parallel” setup, you’ll
need a minimum of seven
male mono 1/4-inch phone
to male mono 1/4-inch
phone cables.
dynamic character.
These two effects signal
processing paths are explained in
the following paragraphs. Further
questions may be directed to us
here at Groove Tubes.
Once you hear the SFX
magic, we predict you’ll never be
able to play in ordinary mono again.
Please take the time to read
this brief setup guide so you may
fully realize the potential, and magic,
of SFX Stereo
An SFX Stereo system
requires either a separate preamp
and stereo amp – or two amps, with
the first amp having a common
effects loop.
Connect the speaker outputs of
the two amps to the SFX Decoder
2
Connect the stereo effects left
and right outputs to the
corresponding SFX Encoder inputs
for Left and Right.
5
Note for keyboards
Stereo keyboards already contain
left-right stereo information, so your
setup is easy. Simply connect the
left-right outputs of your keyboard to
the corresponding SFX Encoder
inputs for Left and Right. Additionally,
the effects mix control on your E1
will act as a master volume for your
whole system for the two sides.
Now you’re ready for action! Plug
in your instrument and get the
preamp signal level showing
adequate gain into the stereo effects
processor. These usually have a
level and peak indicator to help with
this process. Now set the stereo
effects parameter on your stereo
effects to produce a dramatic
Left:Right ratio – and also
SFX Encoder “in-series” setup
Amp #1 (for Front SFX speaker)
Speaker
output
Connect the SFX Encoder
outputs, labeled Front and Side, to
Stereo effects device
Effects loop out (send)
Input (mono)
Outputs (left/right)
Effects loop in (return)
SFX E1 Encoder
Inputs (left/right)
Amp #2 (for Side SFX speakers)
Side output
Front output
Effects loop in (return)
Speaker
output
SFX Encoder “in-parallel” setup
SFX Decoder Speaker Cabinet
Effects mix – Wet:Dry ratio
SFX E1 Encoder
Preamp in
From amp #1 effects loop out (send)
Front input
(8 ohms)
Side
output
Front
output
Preamp
out
Inputs
(left/right)
To amp #1 effects loop in (return)
Side input
(4 ohms)
To amp #2 effects loop in (return)
Input
(mono)
Outputs
(left/right)
Stereo effects device
set your Wet:Dry ratio to taste. Next,
adjust the SFX balance of Side/Front
by using the SFX Encoder levels as a
balance control. We suggest turning
the Front speaker up first to maximum
level, then add in the Side cabinet to
the desired level, which will be
determined by the acoustical
Suggestions for
recording an SFX
system in live
performance
The SFX Encoder
“in-parallel” setup
Tech specs
This stereo effects signal patching
system allows for mixing the dry/wet
Basic description
We’re commonly asked for
suggestions in miking the SFX Stereo
level of your effects at the SFX
Encoder, instead of in the stereo
effects device. This preserves your
phenomenon, and frankly it’s a hard
thing to do.
The best bet is to just mic
environment you’re playing in. This
can be instantly monitored by
defeating the SFX signal on the front
panel, and hearing the amazing
the front speaker, as it’s mono
compatible. If you want a stereo
recording, or for live reinforcement
results of SFX Stereo processing.
Normally, the Side level will be louder
purposes, we suggest using a stereo
mic such as a MS recording system.
Groove Tubes Custom Shop
Products has just such a device for
than your Front, so you’ll usually set
your Side level lower than your front.
Note
The more stereo separation, the
this type of stereo recording. Click
over to www.groovetubes.com – or
see our catalog for our MS-Stereo
Matrix Decoder System that’s used
with stereo mics, or any two mics with
cardioid and figure-eight patterns
available.
Note
Always use shielded signal cable to
avoid noise and hum.
better SFX will work. If you have a
programmable stereo effects device,
create hard left/right programs to
increase the dramatics of SFX Stereo
Technology. You’ll notice the very wide
dispersion pattern – up to 300
degrees – from your SFX Decoder
Speaker Cabinet.
preamp, and before your stereo
effects unit. This requires using a
conventional guitar amp with an
effects loop – such as a currentmodel Fender or Marshall – and a
second slave amp to produce the
stereo result.
The second amp doesn’t
need to be a perfect match to your
first amp, but does need to have a
similar power level as the primary
amp. You may also use separate
components such as a preamp and
a stereo amp.
Right output
Outputs
Front
Side
Inputs
Front
Side
R
L
R
SFX E1
Encoders
Inputs
Front
Front
Preamp
input
Side
Outputs
Side
Inputs
Wet
Stereo amps
Front
output
Side
output
Dry
Combo amp
# 1 SFX amp
SFX E1 Encoder
Front output
Side
output
Input
(mono)
Side
output
Effects loop in
(return)
Effects device mix ratio
100% Wet – 0% Dry
Signal chain for SFX K3
Speaker Cabinet
L
Preamp
output
Inputs
(left/right)
Stereo effects device
Outputs
(left/right)
Amp #2 (for satellite SFX speakers)
(Two Groove Tubes
Dual 75 amps pictured)
Speaker output
Effects loop
in (return)
Front
speaker
input
Full-range
speaker
cabinet
Note: Combo
amp #1 must
sit directly on
top of the SFX
S12 satellite.
Front input
(8 ohms)
Output level – Side
+21dBu
Output impedance – Front
100 ohms
Output impedance – Side
100 ohms
Parallel effects loop
with mix control
section
Input level
Functions between -10dBv
and +4dBu
Input impedance
+21dBu
Output impedance – preamp
Frequency response
20Hz to 20KHz, + or - 0.2 dB
Frequency response at 10Hz
-0.5dB
Frequency response @
00KHz
-0.3dB
Distortion at 1KHz/0 dBu
<0.3% THD
Clipping level – Front Out
+15dBu
Clipping level
Side Out +21dBu
Clipping level
Preamp Out +21dBu
Input impedance – all inputs
30K ohms nominal
Output impedance – all
outputs
100 ohms nominal
Power section
(Groove Tubes
Soul-o 45
pictured)
AC input
115 volts/60 cycles – and
internally switchable to 230
volts
Fuse
External 0.25 amp at 250 volts
Side input
(4 ohms)
Side input
(4 ohms)
SFX S15
Stereo Decoder
Satellite Cabinet
Functions between 10dBv and
+4dBu
Output level – Front
+15dBu
Typical general
system specs
Effects loop out
(send)
Inputs
Input impedance –
Left/Right 30k
Input levels – Left/Right
100 ohms
Stereo
keyboard
Signal chain for SFX S15
Speaker Satellite
Encoder section
Configured using “in-parallel” connections
Configured using “in-parallel”
effects loop connections
Left output
system with output level
adjustments.
30K ohms
Output level – preamp
SFX satellite speaker setup
SFX setup for keyboards
Front
output
original tube preamp‘s sonic and
dynamic character.
The SFX Encoder must be
placed in the signal chain after your
The SFX Technology is a linelevel signal processor which
can achieve Unity Gain through
SFX K3
Stereo Decoder
Speaker Cabinet
(S12 pictured)
Speaker
input
SFX Decoding Speaker Cabinet Satellite
www.groovetubes.com
1
Connect the preamp OR the effects loop
output (send) of your amp top to the SFX
Encoder input labeled “PREAMP IN – from
preamp.”
2
Connect the SFX Encoder’s output labeled
“PREAMP OUT – to the input” to your stereo
effects processor.
Note
Your preamp signal will enter your stereo
effects device as a mono signal, and exit in
stereo mode (Left/Right).
3
Connect the stereo effects unit’s left and
right outputs to the corresponding SFX Encoder
inputs labeled “FX INPUTS – LEFT/RIGHT.”
4
Connect the SFX Encoder outputs, labeled
Front and Side, to the effects loop returns of
both your original amp top, and/or your second
amp – unless you’re using a stereo amp.
change at all. Once you’ve heard your effects
mixed this way, you’ll never want to go back to
an “in-series” signal path again.
7
Next, we’ll adjust the SFX balance
between the Side and Front signals using the
Your SFX Stereo Technology gear is warranted
to the original purchaser for a period of ONE
E1 front panel level controls. We suggest
turning the Front speaker to maximum level,
then adding in the Side cabinet to the desired
YEAR – except tubes and/or speakers which
are warranted for three months – from the
date of purchase. This warranty protects the
level, which will be determined by the
acoustical environment you’re playing in. In
acoustically live rooms with many reflective
purchaser against defects in material and
workmanship.
This warranty is VOID if the unit has
been damaged due to accident, improper
surfaces, you’ll need less Side levels.The SFX
balance – and the magic – can be instantly
monitored by defeating the SFX Side signal on
the front panel.
8
The more stereo separation in the effects
processing, the more dramatic the SFX
processing will be. If you have a programmable
stereo effects device, create extreme hard
left/right programs to increase the dramatics
of SFX Stereo Technology.
5
Connect the two amps speaker outputs to
the SFX Decoder Speaker Cabinet. Be sure the
Front signal amplifier is connected to the SFX
Decoder Speaker Cabinet’s “Front” input, and
the Side signal amplifier’s output to the SFX
Decoder Speaker Cabinet’s “Side” input. Also,
be sure to set your amp’s impedance selector
(if applicable) to the correct input impedance
of the SFX Decoder Speaker Cabinet.
6
Now you’re ready for action! Plug in your
instrument and get the preamp signal level
showing adequate gain into the stereo effects
processor. These usually have either a level
and/or a peak indicator to help you with this.
In the parallel setup, set your stereo effects
device “mix” level to produce 100% Wet and
0% Dry signal as you’ll mix the Wet/Dry ratio
at the SFX Encoder to preserve the original
tone of your tube preamp. After you have set
your effects device for maximum wetness,
then you should only need to mix in a small
fraction of its signal with your original tube
preamp signal (at the E1) with your original
tube preamp signal.
Note
This balance is usually 98% original dry tone
with 2% fully wet-effected signal from your
stereo effects device. In this mode, you can
turn your effects on/off via a footswitch (the
E1 has a 1/4-inch switching jack for this
purpose) and you’ll notice no level or tonal
The Groove Tubes
Custom Shop Products
Warranty
Notice the 300-degree dispersion pattern from
your SFX system. Your whole band will hear
and enjoy your new “magic” stereo image. You
may also find you’re getting better results at
lower volume levels than previously needed.
This is a good thing and be sure to point this
out during band meetings – as maybe they
should get an SFX system, too!
If your SFX gear
needs repair
handling, improper installation, shipping
damage, abuse or misuse, unauthorized repair
or attempted repair, custom modification, or in
the event that the serial number has been
defaced or altered. Groove Tubes LLC reserves
the right to make such determination on the
basis of factory inspection.
All liability for incidental or
consequential damages from breach of any
expressed or implied warranties is disclaimed
and excluded herefrom.
GROOVE TUBES
Groove Tubes LLC
Custom Shop Products
1543 Truman Street
1 Locate the original bill of sale with date of
purchase.
2 Call or write the factory with a brief
description of the problem.
3 We will issue a Return Authorization
Number.
4 Pack the unit carefully, preferably in the
original box, and include a copy of your bill of
sale. Ship it prepaid to the factory with the
Return Authorization Number on the outside of
the box. You are responsible for any freight or
insurance charges when shipping to us. We
will pay for freight and insurance when we
return the unit to you after repairing it (only
when under warranty).
San Fernando, California 91340 USA
Tel 818 361 4500
Fax 818 365 9884
www.groovetubes.com
©2001 Groove Tubes LLC. All rights reserved. Groove Tubes, the GT in a circle
logomark, Groove Tubes Custom Shop, Groove Tubes Custom Shop Products, SFX,
SFX Technology, and SFX Stereo are trademarks and service marks created and
owned by Groove Tubes LLC. All specifications subject to change without notice.
Fender is a registered trademark of Fender Musical Instruments Corporation.
Acoustasonic is a trademark of Fender Musical Instruments Corporation. Marshall
is a registered trademark of Marshall Amplification.
Groove Tubes Specifications:
SFX SPACESTATION™ MK2 STEREO AMPLIFIER
SFX: The Cure For the Common Gig
The GT SFX Spacestation MK2 is a single compact powered monitor that
creates a 300-degree field of stereo sound using a 100-watt per channel
Class D power amp and dipole speaker array. The SFX "acoustical space
vortex" created by the dipole speaker is the secret to the stereo magic,
electronically encoding left and right signals, and then acoustically
decoding them in the unique Front & Side powered speaker systems.
The SFX Spacestation MK2's front speaker is a custom-made co-ax speaker
with a compression driver and super tweeter. The Side speaker is a specially designed full range speaker mounted 90 degrees off axis to the front
speaker. Level and Width controls allow balance between the Front and
Side speakers to compensate for room acoustics (use more Width for a
dead room). The SFX MK2 also offers a Subwoofer output to handle larger
gigs. The improvements over the original SFX models include a new 2-inch
port in the cabinet for extended low end frequency response, as well as a
re-tuning of the cabinet itself, adding smoother, more natural low frequency
harmonics and increasing speaker life while allowing more power output.
In the amplifiers’ electronics, a new heavy-duty passive crossover and a
new active EQ filter combine with its new front coaxial speaker for more
power, tighter definition, and smoother frequency response at all volume
levels.
The SFX Spacestation MK2 is perfect for amplifying stereo sources such as
keyboards, and can also be driven from the stereo outputs of a mixer, or
even directly from many stereo effects devices. Plug in and get a fantastic
300 degree stereo sound field for your vocals, keyboards, bass, and guitar
which all emanates from one central point... so everybody hears the same
mix, even the audience! The SFX Spacestation MK2 measures just 18” high
and 11” deep and wide, and weighs only 32 lbs. It's the perfect solution
for getting terrific, room-filling sound at small gigs!
SFX is a registered trademark of FMIC. US patent 6219426-B1.
SFX SPACESTATION MK2
Inputs
Input Levels
Output
Power
Distortion
Frequency Response
Dimensions
Weight
Electrical
SPECIFICATIONS
Two 1/4” phone jacks for stereo signal input. SFX 100 Only: XLR mic input with 10dB pad and +48V phantom power
Line level (-10dBu to +10dBu) One 1/4” phone jack to drive line level external subwoofer amplifier
100 + 100 Watts RMS into internal speaker loads
0.009% typical, 0.1% maximum THD
60Hz - 20kHz useable
18”H x 11”W x 11”D
(45cm H x 28cm W x 28cm D)
32 lbs. (12.7kg)
120 VAC, 3A (240 VAC, 1.5A)
SFX MK2 FEATURES:
• Great-sounding STEREO amplification from a single cabinet
• Compact and lightweight: only 18” x 11” x 11”, 32 lbs.
• Heavy duty strap handle
• Stereo 100W/channel Class D power amp
• Patented SFX encoder for 300˚ stereo soundfield
• Front speaker system: 8” coax with 1” compression driver and super tweeter
• Master Level and stereo width controls
• Subwoofer output (automatically cuts off internal speakers at 100Hz when activated)
www.groovetubes.com
All specifications subject to change without notice
0108-JKC-SFXMK2
Groove Tubes
SFX Spacestation can handle just about any small live performance where a realistic
stereo image is preferred over the typical (read: boring) Mono or two-point Mono type
musical instrument amps used in the past. Keyboards have been stereo for 20 years...
but players continue to suffer with Mono amps! Our amp creates an exciting stereo
sound field in those smaller venues (with bad acoustics and bad stage location) such as
bars, schoolrooms or church halls. Your vocals and instruments will sound BIG, WIDE, and
FAR more intelligible at the lowest volume levels. You no longer have to play loud to be
heard... it’s truly a cure for the common gig! Your audience will hear more of your performance and at lower levels (read: boy can talk to girl, which sells more drinks making
bartender very happy!) The experience is especially rewarding for you, the performer,
because you hear the same amazing wide stereo sound as your audience hears from
every seat in the house! No more guessing or asking your friend, “How does it sound
out there?” You will know and feel it instantly!
SFX Spacestation 2x100 Stereo Amplifier
2) Electronic Drums: Either live or pre-recorded electronic drum tracks can also be
accommodated by the SFX Spacestation to produce convincing separation. For those
larger gigs, we might recommend a subwoofer.
3) Guitar Amp Modeling: The popular Line 6 POD® can finally move beyond the
bedroom to become a practical tool for live performance through the SFX Spacestation.
The powerful stereo modeling tones of the POD, as heard through stereo headphones,
are totally lost through a conventional Mono guitar amp. Even a conventional stereo PA
system or pseudo stereo combo amps can not extend the stereo effect beyond a few
feet, and even then, it only works if the listener is in the perfect position. Move a few
feet off center, or far back from a conventional stereo PA or combo amp and the stereo
effect is totally lost! All you get is “Mushy Mono”.
The SFX patented signal processing technology is fundamentally different from all conventional stereo systems, and can produce stereo results beyond anything you have ever
experienced. Reviewers have likened it to “standing inside a giant set of headphones”.
Another review said, “Suddenly, you are swimming in the sound of your guitar” (Guitar
World). Only the patented SFX Spacestation responds to the “stereo challenge”. Now, all
within earshot "get it" and the players literally gush with excitement over the big sonic
signature they are hearing for the first time.
The SFX Spacestation’s control panel: Power indicator, 1/4” inputs (left
and right), subwoofer output, SFX width control, amp level control,
power on/off switch, AC power input.
SFX Spacestation Applications
1) Keyboards: SFX Spacestation was designed especially for the modern stereo based
keyboard which has a wide range of stereo based and modeled sound effects. You won’t
believe your ears when your “Leslie®” patch actually spins! Multiple keyboards can be
mixed through a small stereo line mixer. Also, an optional subwoofer can be connected
if you’re covering those big bottom bass parts.
4) “Band in a Box”: Picture this... the whole band using stereo based instruments and
also a few vocal mics processed through a stereo effects unit, then mixed in a stereo
mixer like a studio recording and finally amplified in LIVE stereo dimension through a
single SFX Spacestation amp. No guitar amps, no keyboard amps, no main or monitor
PA... just one SFX Spacestation amp effectively reproducing the whole band. Sound
impossible? Well, it was before SFX was invented just a few years ago. The Left/Right
stereo mixer outputs now emanate from a single acoustic source point. There is no
competition (or weird audio cancellations) common to the multi-amp approach. Using
a single SFX Spacestation amp, the band and the audience now all hear the same
“mix”, and in a convincing stereo soundfield. No need for monitors, no need for the
players to wonder how loud or soft to play as they now can “mix” naturally as they all
hear the same source! The players can concentrate on the music, not the mix! SFX
Spacestation makes playing live a pure pleasure, no more escalating volume competitions from 5 to 10 separate stage amps. Now while we do not seriously suggest using
your SFX Spacestation as a high volume vocal PA for auditoriums, the SFX Spacestation
is ideal for those smaller “acoustic” coffeehouse sets, church worship events, or just a
bedroom jam.
Setting Up the SFX Spacestation
Groove Tubes llc
There are two stereo instrument level inputs, Left and Right. This is where you connect
your stereo keyboard, a POD, or any stereo mixer if you have multiple instruments and
vocals.
The master Width control balances the overall Front and Side system levels (increases
the width of the stereo effect when rotated clockwise). We recommend starting in the 12
o’clock position and adjust more Side speaker level for a dead room, or perhaps less in
an acoustically live room. You should “season” this balance for all occasions.
NOTE: as you might expect, signals with little or no stereo content are not affected
by the Width control because Mono signals don’t stimulate the side speaker. But
feed SFX 100 a good “Leslie” patch or guitar slap delay, and you may get caught
looking around wondering where all the extension speakers are hiding.
Typical SFX Spacestation Setups
Keyboard or other instrument
with stereo outputs feeding SFX
Multiple stereo sound sources (or stereo-effected mono
sources) going to mixer, with stereo outputs of mixer
feeding SFX
300o stereo
300o stereo
SFX Spacestation Specifications
Stereo Inputs:
Power:
Distortion:
Response:
Dimensions:
Weight:
Electrical:
1⁄4” Left/Right phone jacks for stereo instruments and/or line level signals
from -10dBu to +10dBu
2x 100 watts RMS into internal speaker loads
0.009% typical, 0.1% maximum, THD
60 Hz to 20 kHz useable
18” H x 11” D x 11” W (45cm x 28cm x 28cm)
28 pounds (12.7 kg)
120 VAC, 3 A (240 VAC, 1.5 A)
Groove Tubes LLC Custom Shop Products
1543 Truman Street, San Fernando, California 91340 USA
Tel 818-361-4500 Fax 818-365-9884 www.groovetubes.com
©2005 Groove Tubes LLC. All rights reserved. Groove Tubes, the “GT-in-a-circle” logomark, Spacestation
trademarks and service marks created and owned by Groove Tubes LLC. SFX and Acoustasonic trademark
created and owned by Fender Musical Instrument Corporation and used with permission. All other marks
are the property of their respective owners. All specifications subject to change without notice.
SFX SPACESTATION™
Operator’s Guide
POWERED STEREO MONITOR
2x100 Stereo Amp for Instruments and Vocals
US Patent #691426
SFX™ TECHNOLOGY
300˚ Stereo Field Expansion
Our patented SFX circuitry converts the Left/Right stereo input signals from your
keyboard into Front/Side signals, which are in turn amplified by a 100 watt/channel
stereo Class D amplifier to drive a rather unconventional dual chambered, single speaker
system. Our unique technology is the only effective way of producing exciting stereo
sound images in a live venue. Nothing else comes close.
The Package: The SFX Spacestation is a small, yet rugged stereo amp designed for
today’s keyboards and guitar modeling products, like the LINE 6 POD®. The SFX
Spacestation may also be used along with a small mixer to make it the perfect “plug
and play” combo package for the various single performer acts needing a simple solution for small clubs, restaurants and churches. Our unusual looking SFX Front and Side
dual chambered cabinet has a 3-way Front speaker system consisting of an 8” Co-Ax
woofer, a 1” compression driver/horn,
and a super tweeter, all tuned by our
electronic crossover and housed in the
upper chamber. The contrasting 6.5”
full range Side speaker is an open-air
dipole system set at a 90 degree angle
to the upper speaker. Together, these
radically different speakers combine to
create a “Stereo Sound Vortex” that
keep the stereo image without mixing in
the open air... these separate sound
waves are like oil and water so they
arrive to your ear as separate signals, to
be combined in your brain to create the
psychoacoustic effect. This is the process
that produces the magical SFX sound.
But perhaps the best feature of our SFX
Spacestation Big sound is its Small size!
It’s only 18” high, 11” deep and wide
and weighs just 28 pounds! This lightweight package fits nicely in a New York
taxi, or strap it behind your Harley!