Eich T-300 User manual

T·300 T·500 T·900
Gain Taste Lo LoMid HiMid Hi Master DI
Input Clip
Mute Post
On
Gnd Lift
0 10 0 10 0 10 0 10 0 100 10 RichDry
0 10 0 10 0 10 0 10 0 100 10 RichDry
Gain Taste Lo Lo Mid Hi Mid Hi Master DI
Input
Clip
Mute Post
On
Gnd Lift
0 10 0 10 0 10 0 10 0 100 10 RichDry
Gain Taste Lo Lo Mid Hi Mid Hi Master DI
Input
Clip
Mute Post
On
Gnd Lift
MANUAL

Congratulations! You are now the proud owner of a EICH
T bass amplifier. This manual will help you get to learn
all the useful and exciting features of one of the best
amplifiers in the world.
The new EICH T is extremely small in size but very big in
sound. Composed of only the finest materials this com-
pact sound machine covers a broad frequency range and
impresses with a powerful punch.
Exclusive features and our new ultra-flat premium input
stage set new standards in this amplifier class. The very
effective tone controls suit all musical styles. The amps
of the T series boast a four-band tone control section
which lets you easily dial any sound you want. The TAS-
TE control emphasizes the tonal characteristics of the
individual instrument. Set to the centre, the control has
no effect on the signal. Turn it counter-clockwise to filter
out some ultra-low frequencies and at the same time
enhance a pronounced mid range. This is the ultimate
fretless tone. Turn it clockwise to soften the high end
which leads to a pumping bass sound.
Additional features like an effects loop, Tuner Out, Line
Out, Line In, Speakon® output and a DI out with Pre/
Post- and Ground Lift-switch prove that the T amps are
extremely versatile devices. T amps are ideal for travel-
ling around the world due to their voltage switch which
allows them to be operated at 230 and 115 volts.
The result is an impressive live performance with an un-
beatable power-to-weight ratio.
The meticulous quality control during all stages of pro-
duction guarantees failsafe performance. Using only the
best components available the unique circuit design and
the professional workmanship make the T today’s state-
of-the-art in top-of-the-line bass amp manufacturing.
>> T TOPS
IMPORTANT SAFETY INSTRUCTIONS
The apparatus shall not be exposed to dripping or splashing and that
no objects with liquids, such as vases, shall be placed on the appara-
tus. The MAINS plug is used as the disconnect device, the disconnect
device shall remain readily operable.
Warning: the user shall not place this apparatus in the area during
the operation so that the mains switch can be easily accessible.
1. Read these instructions before operating this apparatus.
2. Keep these instructions for future reference.
3. Heed all warnings to ensure safe operation.
4. Follow all instructions provided in this document.
5. Do not use this apparatus near water or in locations where con-
densation may occur.
6. Clean only with dry cloth. Do not use aerosol or liquid cleaners.
Unplug this apparatus before cleaning.
7. Do not block any of the 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 is provided
for your safety. If the provided plug does not into your outlet,
consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particu-
larly at plug, convenience receptacles, and the point where they
exit from the apparatus.
11. Only use attachments/accessories specified by the manufactu-
rer.
12. Use only with a 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 tipover.
13. When a cart is used, use caution when moving the cart/appara-
tus combination to avoid injury from tipover.
14. Unplug this apparatus during lighting storms or when unused for
long periods of time.
15. Refer all servicing to qualified service personnel. Servicing is re-
quired 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.
CAUTION: Use of controls or adjustments or performance of proce-
dures other than those may result in hazardous radiation exposure.
WARNING: To reduce the risk of FIRE or electric shock, do
not expose this apparatus to rain or moisture.
CAUTION: RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK) NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within
the product’ s enclosure that may be of suficient magni-
tude 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 appliance.
!
CE Declaration of Conformity
T Bassamp
We declare under our sole responsibility that this product is
in conformity with the following standards or standardization
documents in attention of operation conditions and installation
arrangements according to operating manual:
EN 61000-3-2, EN 61000-3-3, EN 55013, EN 55020, EN 55022,
EN 60065 according to the provisions of the regulations
89/336/EWG and 73/23/EWG.
Gain Taste Lo LoMid Hi Mid Hi Master DI
Input Clip
Mute Post
On
Gnd Lift
0 10 0 10 0 10 0 10 0 100 10 RichDry
0 10 0 10 0 10 0 10 0 100 10 RichDry
Gain Taste Lo Lo Mid HiMid Hi Master DI
Input
Clip
Mute Post
On
Gnd Lift
0 10 0 10 0 10 0 10 0 100 10 RichDry
Gain Taste Lo Lo Mid HiMid Hi Master DI
Input
Clip
Mute Post
On
Gnd Lift
3

>> FRONT PANEL
1 INPUT
Plug in your shielded instrument cable into this jack. We
advise you to always turn down the volume control on
your instrument before plugging it into this jack.
2 CLIP
The red »CLIP« LED helps you adjust the input sensitivity
of the T preamp so that the signal from your instrument
best matches the preamp’s internal operating level. Turn
up the »GAIN« control (#3) while you hit the strings of
your bass hard until the »CLIP« LED starts flashing. Now
back up the »GAIN« (#3) control a bit until the LED goes
off. The flashing »CLIP« LED tells you that the input sta-
ge of the preamp is clipping somewhere and that you
should either turn down the »GAIN« control (#3). Keep
in mind that excessive use of the »LO« control (#5) will
raise the internal level and thus make the »CLIP« LED
come on much earlier.
3 GAIN
This control adjusts the basic signal level in the preamp
and thus determines it’s sensitivity and overall dynamic
characteristics. In order to best adjust your instrument’s
signal level to the internal operating level of T watch the
»CLIP« LED (#2). Set the »GAIN« such that the »CLIP« LED
(#2) just doesn’t come up.
Do not leave the volume control on your instrument
set too low, otherwise noise picked up along the
cable will become more prominent and thus lower
the signal-to noise ratio of the amp.
4 TASTE
This unique feature adds to the superiority of the T’s to-
nal qualities. Leave the control in the centre position if
you seek a more “natural” sound. When turned to the
right (clockwise) towards »RICH« the sound gets incre-
asingly fatter with lots of low-end punch, ending in a
warm, vintage-like tone. When turned to the left (coun-
ter clockwise) towards »DRY« this control adds urgent
attack and midrange growl.
The “TASTE” control allows you to quickly and
effectively soften those instruments which sound
a little harsh and scathing. At the same time bass
guitars with a muddy, booming neck pickup gain
definition by turning the “TASTE” control towards
the “DRY” position.
5 LO
This is the primary low frequency control. It allows for
cutting or boosting the frequency range around 30 Hz
by 15 dB each. This frequency range represents the bot-
tom end and massive yet distinguished punch in a bass
guitar. Start from the 12 o’clock position and dial in the
sound you like.
6 LO MID
The »LoMID« control is centred at 250 Hz and offers a cut
or boost of 12 dB. The slope of this control is not as steep
as the one of the »LO« control (#5). This frequency range,
when turned up, determines the body of the bass guitar
signal and lets the bass kick out in a mix. Turn it counter
clockwise to reduce unwanted room resonance.
7 HI MID
The »HiMID« control is centred at 800 Hz and offers a
cut or boost of 12 dB, again with a more gentle slope
just like the »LO MID« control (#6). Due to the broader
ranges which are covered by these controls the sound
never gets booming or honky when you turn them all
the way up. Turning up the »HI MID« control gives you
a great fretless sound. On the other hand, when you cut
the »HI MID« range you end up with a funky slap sound
of extremely high quality.
8 HI
The »HI« control is centred at 8 kHz and offers a cut or
boost of 15 dB. Turn it up for a biting, crystal clear rock
or funk bass. Turn it counter clockwise to reduce hiss or
generally dampen the sound for a muted reggae feel.
9 MASTER
This is the overall volume control of the T and works
on internal power amp. It determines the level at the
»SPEAKER OUTPUTS« (#16) as well as the »LINE OUT«
jack on the back panel (#17). Furthermore you can control
the level of the audio source connected to the »AUX IN«
jack to blend it with your bass signal.
54
Gain Taste Lo LoMid Hi Mid Hi Master DI
Input Clip
Mute Post
On
Gnd Lift
0 10 0 10 0 10 0 10 0 100 10 RichDry
1 3 4 5 6 7 8 9
13a
122 10 11
12a

>> FRONT PANEL
10 MUTE
The »MUTE« switch should be depressed when you po-
wer up or down your T-Bassamp the switch illuminates
when the function is engaged. In this mode no audio si-
gnal will be processed and heard at any output except
the »TUNER« jack (#21). That way you don’t have to turn
down the volume for silent tuning or when changing ins-
truments, thus you do without the nasty cling which you
usually hear when you unplug the jack.
The »MUTE« switch also interrupts the signal path at the
balanced »DI OUT« (#12), no matter which position the
switch »POST« (#11) and »GND/LIFT« (#12a) is in (that
way your silent tuning or changing instruments won’t be
heard in the PA, either). During breaks the amp should
be set to »MUTE« rather than switched off completely.
That way the internal fan (only T 900) stays on and cools
down the power amp circuitry if necessary. Disengage
the »MUTE« function and start to rumble – now there is
signal at all outputs again.
11 POST
With this switch the transformer balanced »DI OUT«
(#12) can be selected to be a »PRE« or »POST« preamp
signal. In the »PRE« position (switch is not depressed)
the »DI OUT« signal (#12) is tapped directly after the in-
put stage including the »GAIN« control (#3).
In the »POST« position (switch illuminates when the
function is engaged) the »DI OUT« signal (#12) is taken
after it has been processed by the complete preamp, i.e.
including the »GAIN« control (#3), the tone control sec-
tion (#5 through #8), and the »EFFECTS LOOP« (#19). It is
not affected by the »MASTER« control (#9).
12 DI
The T-Bassamp supplies a transformer balanced line out-
put signal for connecting to a house mixing board, recor-
ding console or external amplifier(s) with balanced inputs.
Connect a shielded 3-core microphone cable with XLR
plugs to this male XLR output.
The need for an additional active DI box, which can be
pretty expensive, is obsolete. Due to the advanced circuit
design using only the best components available the high
sound quality of the »DI OUT« makes it the amp of choice
in any recording studio (you can use the T’s pre amp on its
own without driving any speakers). The DI signal can be
tapped either before or after the preamp, as determined
by the switch »POST« (#11).
12a GND/LIFT
There is no need to be afraid of nasty ground loops any-
more. In case you will get a ground loop, please switch the
»GROUND LIFT« (#12a) into the »LIFT« position.
13a ON
Provided the included power cord is plugged into the »PO-
WER SOCKET« on the back panel (#14) and into an appro-
priate wall socket, the white line on the front panel will
illuminate when the »POWER SWITCH« (#13) is turned on,
no matter what positions other switches are in.
76
Gain Taste Lo LoMid Hi Mid Hi Master DI
Input Clip
Mute Post
On
Gnd Lift
0 10 0 10 0 10 0 10 0 100 10 RichDry
1 3 4 5 6 7 8 9
13a
122 10 11
12a

>> BACK PANEL
13 POWER
At the risk of stating the obvious, this switch is used
to turn the T on and off. Before you turn on the amp do
make sure that the »MUTE« switch (#10) is depressed.
Activating the »POWER SWITCH« (the top of the switch
must be depressed towards the amp chassis) will make
the white line on the front panel (#13a) illuminate. The
amp is OFF when the bottom of the »POWER SWITCH«
is depressed – the white line (#13a) will no longer illu-
minate.
Before you plug in do make sure that the voltage is
correct (see #15)!
14 POWER RECEPTACLE
Connect the supplied AC power cord to the power recep-
tacle. Make sure the IEC plug is firmly inserted in the so-
cket. The other end of the cable should be connected to any
standard grounded AC outlet or into a power strip of proper
voltage. Before you plug in do make sure that the voltage is
correct (see #15)! Just in case you lose the cord provided,
the jack accepts a standard 3-prong IEC cord like those
found on most professional gear and computers – you can
get one at any electronics, music or computer store.
Never (!) remove or otherwise attempt to defeat the
ground pin of the power cord in order to get rid of a
hum induced by a ground loop.
14a POWER FUSE
The T is fused for your and its own protection. If you sus-
pect a blown fuse, disconnect the cord, pull out the »FUSE
DRAWER« (#14a, located just below the cord receptacle)
and replace the fuse with another suitable fuse. There
should be a spare fuse in the fuse drawer.. When you’re in
a country with a standard of 115 volts set the »VOLTAGE
SELECTOR« (#15) accordingly. If two fuses blow in a row,
something is very wrong. Do not open the unit. Refer ser-
vice to qualified service personnel.
15 VOLTAGE SELECTOR
The Amp features a »VOLTAGE SELECTOR« allowing you
to use your amplifier anywhere in the world just by the
flick of a switch. The unit is set to 230 V when we ship to
a country in Europe. Should you wish to use your T in the
USA set the »VOLTAGE SELECTOR« to “115 V”.
ATTENTION: Don’t forget to set it back to “230 V”
when you return home! EICH cannot be made res-
ponsible for damages to the unit caused by impro-
per voltage selection. Therefore it is a good idea
to always check the “VOLTAGE SELECTOR” before
powering up the unit.
16 SPEAKER OUT
T sports one Neutrik Speakon®Combo NLJ2 MD-V spea-
ker output. Just make sure that the minimum load of
the power amp is no less than 4 ohms. Thus you can
connect two 8 ohms speakers or one 4 ohms speaker.
Whatever your setup is, always make sure that the
speaker cables are as long as necessary but as
short as possible, using heavy gauge cable (we re-
commend at least 2 x 2.5 mm2).
Do stick to speaker cables with Speakon®connec-
tors only, either NL2FX (two pin connector) or NL4FX
(four pin connector). No matter which plug you use
the “hot” wire must be connected to pin “1+” and
the “cold” wire to pin “1-“. This Speakon®Com-
bo socket is also able to handle a 1/4“ jack. High
quality EICH speaker cables can be obtained as an
option.
You can find the output power of the T amps on page 11
under Technical Specifications.
17 AUX IN
This 3.5mm stereo Aux In jack provides the possibility to
connect your mp3 player, your iphone or other external
audio sources. You can control its‘ level with the »MAS-
TER« volume (#9) to blend it with your bass signal. Please
use the included 3.5mm stereo cable to connect the audio
source of your choice.
18 PHONE OUT
This 3.5 mm stereo jack lets you connect your headphones.
With the »MASTER« volume (#9) you can control both the
level of your instrument and the level of the audio source
connected to the »AUX IN« jack (#17). It is possible to
use your T without a cabinet, so you can just play in any
situation!
98
USE ONLY WITH A 250V FUSE
N
E
U
T
R
I
K
MINIMUM LOAD 4 Ω
SEND
EFFECTS LOOP
RETURNLINE OUT
LINE IN
TUNER
SPEAKER OUT REHEARSAL HIGH VOLTAGE! CAUTION:
TO PREVENT THE RISK OF
FIRE AND SHOCK HAZARD
DON’T EXPOSE THIS
APPLIANCE TO MOISTURE
OR RAIN. DO NOT OPEN
CASE. REFER SERVICING
TO QUALIFIED SERVICE
PERSONNEL.
AUX IN
Made in Germany
230
13 14 15 16 18 2021 1919a 19b
1714a

>> BACK PANEL
19 EFFECTS LOOP
RETURN/LINE IN, SEND
Connect the output of the (last) external device to the
»RETURN« jack. Always use high quality shielded instru-
ment cables for connecting to and from external devices.
Keep the cables as short as possible.
If you notice crackling distortion when using external
effects, either the batteries of the stomp box have run
out, or the send level of the amplifier is too high for the
processor’s input stage. In this case you better connect
the device between bass guitar and amplifier.
The »RETURN / LINE IN« jack (#19a) can also be used to
connect various external audio sources to the T such as
an MP3 player, or in order to just use the power amp of
the T. The »MASTER« control (#9) determines the final
output level. As the »RETURN / LINE IN« jack (#19a) is
placed after the tone controls (#5 through #8). Connect
the »SEND« jack (#19b) to the input of the (first) external
device.
20 LINE OUT
This jack provides a line level signal for connection to
a separate power amp, PA mixing console or recording
equipment. The volume of the signal is controlled by the
»MASTER« control (#9). Note that the output is muted
when the »MUTE« function (#10) is engaged.
21 TUNER
This jack is provided for connection to an electronic tuner
and is always “live” even when the T is in “MUTE” mode
(#10). This allows for silent tuning as well as providing a
monitor feed which stays hot even when the house mix
is muted.
22 MAGNET FIX PINS
On the bottom of the amp the »MAGNET FIX PINS« holds
all our T-Series Amps on all our EICH Amplification cabi-
nets. The ultra-strong magnets holds the amp safe be-
cause all Cabinets are equipped with the »AMP FIXING«
system. Even inclination angle above 45 ° are no problem.
1110
TECHNICAL SPECIFICATIONS
input impedance: 1 meg ohms
sensivity: -26 dB max
EFFFECTS LOOP impedance
EFFECT SEND: 600 Ohm
EFFECT RETURN/LINE IN: 10 kOhm
nominal input level: 0 dBu
LINE OUT impedance: 600 Ohm
nominal output LINE OUT: +6 db
impedance balanced DI out: 600 Ohm
nominal output level Dl out: +6 dBu
tone control section:
LO: 30Hz/+-15dB
LO MID: 250Hz/+-12dB
HI MID: 800Hz/+-12dB
HI: 8k/+-15dB
Power:
T300 300 w/4 ohms,
200 w/8 ohms
T500 500 w/4 ohms,
300 w/8 ohms
T900 900 w/4 ohms, 600 w/8 ohms
Fuse 230V/AC, 115V/AC T 300: 2,5 A/T
T 500: 4,0 A/T
T 900: 6,3 A/T
dimensions (w x h x d): 10,6“ x 1,7“ x 8,3“
weight: T 300: 1,27 kg, 2,80 lbs
T 500: 1,49 kg, 3,28 lbs
T 900: 1,69 kg, 3,72 lbs
MAGNET FIX PIN
BOTTOM
FRONT
22
USE ONLY WITH A 250V FUSE
N
E
U
T
R
I
K
MINIMUM LOAD 4 Ω
SEND
EFFECTS LOOP
RETURNLINE OUT
LINE IN
TUNER
SPEAKER OUT REHEARSAL HIGH VOLTAGE! CAUTION:
TO PREVENT THE RISK OF
FIRE AND SHOCK HAZARD
DON’T EXPOSE THIS
APPLIANCE TO MOISTURE
OR RAIN. DO NOT OPEN
CASE. REFER SERVICING
TO QUALIFIED SERVICE
PERSONNEL.
AUX IN
Made in Germany
230
13 14 15 16 18 2021 1919a 19b
1714a

Alter Bahnhofsweg 5 · 35745 Herborn, Germany · Fon [phone] · e-Mail: [email protected]
www.eich-amps.com