MC2 Audio E Series User manual

E100

2
E100
E100E100
E100
OPERATORS
MANUAL
MC
2
AUDIO Ltd.,
Units 6-8, Kingsgate,
Heathpark Industrial state,
HONITON,
Devon X14 1YG
ngland
Tel: ++(0)1404.44633 Fax: ++(0)1404.44660
www.mc2-audio.co.uk

3
CONTENTS
EC DECLARATION OF CONFORMITY 3
IMPORTANT SAFETY INSTRUCTIONS 4
INSTALLATION Electrical 4
RF Emissions 8
Mec anical 8
GENERAL INFORMATION 10
CONNECTIONS Inputs 11
Outputs 12
OPERATION Switc ing on 13
Level controls 13
Bar signal indicators 13
-3dB indicator 13
Limiters 13
PRC indicators 13
Temperature control 13
Fault indicator 14
CH Link LED 14
MAINTENANCE 15
TECHNICAL SPECIFICATION 16
APPENDIX Table of PRC settings and resulting 17
output

4
Important Safety Instructions
1) Read and keep t ese instructions.
2) Heed all warnings.
4) Follow all instructions.
5) Do not block any ventilation openings, install in accordance wit t e manufacturer’s
instructions.
6) Unplug t is apparatus during lig tning storms or w en unused for long periods of time.
7) Clean only wit a dry clot .
8) Do not use t is apparatus near water; t e apparatus s all not be exposed to dripping or
splas ing and no objects filled wit liquids, suc as vases s all be placed on t e
apparatus.
9) Refer all servicing to qualified service personnel. Servicing is required w en t e
apparatus as been damaged in any way, suc as if t e power-supply cord or plug is
damaged, liquid as been spilled or objects ave fallen into t e apparatus, t e
apparatus as been exposed to rain or moisture, does not operate normally, or as
been dropped.
Installation Instructions: ELECTRICAL
T e amplifier as been manufactured to comply wit your local power supply requirements, but before
connecting t e unit to t e supply, ensure t at t e voltage (printed on t e rear panel) is correct.
Make sure power outlets conform to t e power requirements listed on t e back of t e unit. Damage
caused by connecting to improper AC voltage is not covered by t e warranty.
SAFET WARNING
Apparatus wit CLASS I construction s all be connected to a MAINS socket outlet wit a protective
eart ing connection.
W ere a MAINS plug or appliance coupler is used as t e disconnect device, it s ould remain readily
operable.
W ere t e amplifier is mounted in a rack and permanently connected to t e mains, t en t e rack s ould
be installed wit a readily accessible connector or an ALL POLE circuit breaker wit 3mm breaking
distances.
T is unit is fitted wit a 3-wire power cord. For safety reasons, THE EARTH LEAD SHOULD NOT BE
DISCONNECTED IN AN CIRCUMSTANCE. If ground loops are encountered consult t e section on
‘Input Connections’ later in t is manual.
THE WIRING COLOURS ARE:
230V AREAS: EARTH = GREEN AND YELLOW 120V AREAS: EARTH = GREEN
NEUTRAL = BLUE NEUTRAL = WHITE
LIVE = BROWN LIVE = BLACK

5
WARNING To reduce t e risk of fire or electric s ock, do not expose t is apparatus to rain or
moisture.
WARNING To prevent injury, t is apparatus must be securely attac ed to t e rack in
accordance wit t e installation instructions
WARNING Apparatus wit CLASS I construction s all be connected to a MAINS socket outlet
wit a protective eart ing connection
TO AVOID ELECTRICAL SHOCK DO NOT REMOVE COVERS. REFER ALL SERVICING TO QUALIFIED
PERSONNEL.
DO NOT USE THE UNIT IF THE ELECTRICAL POWER CORD IS FRAYED OR BROKEN. T e power supply
cords s ould be routed so t at t ey are not likely to be walked on or pinc ed by items placed upon or
against t em, paying particular attention to cords and plugs and t e point w ere t ey exit from t e
appliance.
ALWAYS OPERATE THE UNIT WITH THE AC GROUND WIRE CONNECTED TO THE ELECTRICAL SYSTEM
GROUND. Precautions s ould be taken so t at t e means of grounding of a piece of equipment is not
defeated.
DO NOT REMOVE THE LID. Removing t e lid will expose you to potentially dangerous voltages. T ere
are no user serviceable parts inside.

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1. Read t ese instructions.
2. Keep t ese instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use t is apparatus near water.
6. Clean only wit a dry clot .
7. Do not block any ventilation openings, install in
accordance wit t e manufacturer’s instructions.
8. Do not install near any eat sources, suc as
radiators, eat registers, stoves or ot er apparatus
(including amplifiers) t at produce eat.
9. Protect t e power cord from being walked on or
pinc ed particularly at plugs, convenience
receptacles and t e pint w ere t ey exit from t e
apparatus.
10. T e mains circuit breaker s all remain readily
accessible.
11. Only use attac ments/accessories specified by t e
manufacturer.
12. Use only wit t e cart, tripod, bracket or table
specified by t e manufacturer, or sold wit t e
apparatus. W en a cart is used, use caution w en
moving t e cart/apparatus combination to avoid
injury from a tip over.
13. Disconnect t is apparatus during lig tning storms
or w en unused for a long period of time.
14. Refer all servicing to qualified service personnel.
Servicing is required w en t e apparatus as been
damaged in any way, suc as if t e power-supply
cord or plug is damaged, liquid as been spilled or
objects ave fallen into t e apparatus, t e
apparatus as been exposed to rain or moisture,
does not operate normally, or as been dropped.
15. Do not expose t is equipment to dripping or
splas ing and ensure t at no objects filled wit
liquids, suc as vases, are placed on t e
equipment.
16. To completely disconnect t is equipment from t e
AC mains, disconnect t e power cord from t e
mains circuit breaker.
17. W ere t e amplifier is mounted in a rack and
permanently connected to t e mains, t en t e rack
s ould be installed wit a readily accessible
connector or an ALL POLE circuit breaker wit 3mm
breaking distances.
18. T is unit is fitted wit a 3-wire power cord. For
safety reasons, THE EARTH LEAD SHOULD NOT BE
DISCONNECTED IN ANY CIRCUMSTANCE.
19. T e cooling fans suck cool air in t roug t e front
and blow ot air out at t e rear of t e unit t roug
t e ventilating grills. T e front and rear of t e
amplifier s ould ave free exposure to t e air (i.e.
in a rack leave t e front and rear doors off), wit
2cm air gap at t e sides and top. IF AIR IS NOT
ALLOWED TO ESCAPE FROM THE REAR, OVER-
HEATING WILL OCCUR. Take care w en mounting
ot er equipment in t e same rack.
WARNING:
Apparatus wit CLASS I const
ruction s all be connected to a MAINS socket outlet wit a protective
eart ing connection.
WARNING: To prevent injury, t is apparatus must be securely attac ed to t e rack in accordance wit t e installation
instructions.

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1. Lisez ces instructions.
2. Gardez ces instructions.
3. Faites attention à tous les avertissements.
4. Suivez toutes les instructions.
5. N'utilisez pas cet appareil près de l'eau.
6. Faites le ménage seulement avec un tissu sec.
7. Ne bloquez pas d'ouvertures de ventilation, installez
conformément aux instructions du fabricant.
8. N'installez près d'aucunes sources de c aleur,
comme les radiateurs, les registres de c aleur, les
cuisinières ou d'autre appareil (en incluant des
amplificateurs) qui produisent la c aleur.
9. Protégez la corde de pouvoir d'être marc é sur ou
pincé particulièrement aux prises de courant, les
réceptacles d'avantage et la pinte où ils sortent de
l'appareil.
10. Le disjoncteur de conduite principale restera sans
ésiter accessible.
11. Utilisez seulement des attac ements/accessoires
spécifiés par le fabricant.
12. Utilisez seulement avec le c ariot, le trépied, la
parent èse ou la table spécifiée par le fabricant, ou
vendu avec l'appareil. Quand un c ariot est utilisé,
utilisez la prudence en déplaçant la combinaison de
c ariot/appareil pour éviter la blessure d'un bout.
13. Débranc ez cet appareil pendant les tempêtes de
foudre ou quand neuf pendant un long terme de
temps.
14. Renvoyez tout l'entretien au personnel de service
qualifié. L'entretien est exigé quand l'appareil a été
nui de toute façon, comme si la corde de pouvoir
provision ou la prise de courant sont nuis, le liquide
a été déversé ou les objets sont tombés dans
l'appareil, l'appareil a été exposé pour pleuvoir ou
l' umidité, n'opère pas normalement, ou a été
baissé.
15. N'exposez pas cet équipement au fait de tomber
goutte à goutte ou au fait d'éclabousser et
garantissez qu'aucun objet rempli des liquides,
comme les vases, n'est placé sur l'équipement.
16. Pour complètement débranc er cet équipement de
la conduite principale de courant alternatif,
débranc ez la corde de pouvoir du disjoncteur de
conduite principale.
17. Où l'amplificateur est monté dans un égouttoir et
en permanence raccordé à la conduite principale,
alors l'égouttoir devrait être installé avec un
connecteur sans ésiter accessible ou TOUT le
disjoncteur de PÔLE avec 3 millimètres cassant des
distances.
18. Cette unité est correspondue avec une corde de
pouvoir de 3 fils. Pour les raisons de sécurité,
l'AVANCE DE TERRE NE DEVRAIT ÊTRE
DÉBRANCHÉE DANS AUCUNE CIRCONSTANCE.
19. Les ventilateurs engloutissent l'air frais par le front
et soufflent l'air c aud à l'arrière de l'unité par les
grils aérants. Le front et l'arrière de l'amplificateur
devraient avoir l'exposition libre à l'air (c'est-à-dire
dans un égouttoir omettent les portes de devant et
arrière), avec le trou aérien de 2 centimètres aux
côtés et au aut. Si on NE PERMET PAS QUE D'AIR
S'ÉCHAPPE DE L'ARRIÈRE, LE FAIT DE
SURCHAUFFER SE PRODUIRA. Faites attention en
montant d'autre équipement dans le même
égouttoir.
ATTENTION
: Appareils de construction de CLASSE I doit
être raccordé au réseau électrique via une prise de courant
reliée à la terre.
ATTENTION: Pour éviter toute blessure, cet appareil doit être solidement fixé à la torture, conformément aux
instructions d'installation.

8
INSTALLATION EMC (RF Emissions)
T e ig frequency resonant converters in t e E Series amplifiers ave been designed to ave very
low radio frequency (RF) emissions, w ic can cause interference wit ot er equipment. In order for t is
to be optimised, t e amplifier s ould be mounted in a metal rack enclosure, w ic s ould ave a
separate (tec nical) Eart . Alternatively a separate eart s ould be attac ed to t e amplifier at t e rear
rack mounting bracket.
INSTALLATION: MECHANICAL
To ensure t at t is equipment performs to specification, it s ould be mounted in a suitable rack or
enclosure as described below. Like all ig power amplifiers, it s ould be kept away from ot er
equipment w ic is sensitive to magnetic fields. Also, t is amplifier may suffer a substantial reduction in
performance if it is subjected to, or mounted close to equipment w ic radiates ig RF fields.
Warning: To prevent injury, this apparatus must be securely attached to the rack in accordance
with the installation instructions
W en mounting t e amplifier in a rack or enclosure, ensure t at:-
1. T e rear of t e unit is adequately supported. T e brackets w ic are supplied fit standard 19 inc
(483mm) rack mounting systems. THE FRONT PANEL IS NOT CAPABLE OF SUPPORTING THE
UNIT ON ITS OWN.
2. THERE IS ADEQUATE VENTILATION. T e cooling fans suck cool air in t roug t e front and blow
ot air out at t e rear of t e unit t roug t e ventilating grills. T e front and rear of t e amplifier
s ould ave free exposure to t e air (ie in a rack leave t e front & rear doors off), wit 2cm air
gap at t e sides. IF AIR IS NOT ALLOWED TO ESCAPE FROM THE REAR, OVER-HEATING WILL
OCCUR. Take care w en mounting ot er equipment in t e same rack.
3. T e rack unit as a separate eart connection (tec nical eart ).
ALSO SEE MAINTENANCE SECTION, page 15.

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General Information
Your E100 power amplifier utilises a proprietary designed switc ing output (Class-D), w ic couples
t e advantages of extremely ig power output levels wit very ig efficiency and yet maintains a ig
sonic performance consistent wit MC
2
Audio p ilosop y.
Sop isticated internal controls and protection circuits maintain t e amplifier at optimum performance
level regardless of situation. Fan speed is varied as required to keep t e amplifier wit in its temperature
limits and signal limiters are included to protect speakers from clipped signals.
T e amplifiers include full DC and s ort circuit protection to ensure trouble-free service even in ‘ ars er’
environments.
T e E SERIES introduces t ree user-controlled features previously not seen on MC
2
Audio
amplifiers:
 -3dB indicators
 Power reduction control (PRC)
 User-settable gain/sensitivity (internal)
 Output Current limiters and dynamic power control.
-3dB INDICATORS
Part of t e front panel signal level display, t ey will lig t up w en t e signal is approximately 3dB below
t e limiting point. T e limiting point is set during production to be at t e onset of clipping. T e response
times of t e -3dB indicators (YELLOW) are faster t an t ose of t e limit indicators (ORANGE).
Power Reduction Circuit (PRC)
T is enables t e user to set a maximum output power level below t e rated output of t e amplifier. T is
reduction is controlled by switc es on t e rear panel, 2 per c annel. Eac c annel as an LED indicator
(GREEN) active w en eit er PRC switc is selected. A full table of PRC settings and t e resulting outputs
are given in t e Appendix. T e possible settings are: -2dB, -4dB, -6dB. T is relates to t e maximum
output of t e amplifier. (See t e c art in t e Appendix section at t e end of t is manual.)
In bridged mode t e C annel A PRC circuit operates over bot C annel A and B. In t is mode C annel
B PRC is not used and is out of circuit. T e same rules apply for c annels C and D in bridged mode.
Notes on Dynamic Amplifiers
T e E100 is t e very latest example of a ‘dynamic amplifier’. T is new ‘breed’ of power amplifiers
provide very ig peak power levels in a muc smaller, and lig ter, package t an previously possible
wit conventional amplifiers. T ey are designed specifically for today’s ig power audio installations,
w ic use multiple speakers wit electronic crossovers or speaker controllers. T ese systems can andle
very ig transient signals w ic far exceed t eir RMS power rating. T e E Series amplifiers ave
been designed to matc t is requirement and can deliver uge levels of power for s ort durations. In
order to protect t emselves and t e loudspeakers t at t ey are driving, continuous signals, suc as sine
waves, are automatically detected and reduced (ramped down) to a safe level. W en trying to measure
the power output owever, continuous signals will give totally incorrect results. A dynamic signal,
suc as a tone burst, s ould be used and t e levels measured by monitoring t e waveform on an
oscilloscope. T e power envelope can t en be accurately measured.

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Connections
INPUTS
Note: T is amplifier is wired to t e latest industry recommendations. PIN1 is connected directly to t e
c assis/mains eart . If ground loops (mains um) are encountered remove t e screen
connection from t e ot er end of t e cable and leave it open circuit. If problems persist, consult
your dealer/supplier, DO NOT TAMPER WITH OR ALTER ANY GROUND (EARTH) CONNECTIONS
INSIDE THE AMPLIFIER.
T e inputs are made via 3-pin XLR connectors, w ic are electronically balanced and s ould be
connected via a ig grade twin core screened cable, as follows:-
PIN1 - Screen (see note)
PIN2 - Hot (signal +)
PIN3 - Cold (signal -)
T e amplifier is designed to operate wit fully balanced equipment and ground loops or loss of
performance may be experienced if connected to unbalanced sources. If it is unavoidable owever, t e
following wiring s ould be used. T e cable s ould still be twin core plus screen.
PIN1 - Screen - connected to t e c assis of t e unbalanced equipment - or left disconnected at t e
unbalanced end.
PIN2 - Signal Hot
PIN3 - Signal Cold
For BRIDGED OPERATION use c annels A & B (or C & D). Inputs s ould be connected to c annel A (or
C). Pressing t e A/B link switc (or C/D link switc ) on t e rear panel connects B amplifier to t e A input
(or t e D amplifier to t e C input).
Input Link Switches.
T e t ree input link switc es on t e rear panel link t e inputs of t e c annels to t e one ig er up t e
ierarc y ladder. So t e following combinations can be ac ieved.
A & B (input on A) B & C (input on B) C & D (input on C)
A & B & C (input on A) B & C & D (input on B)
A & B & C & D (input on A)
T is switc ing, toget er wit internal crossover cards (optional extras) provides a wide variety of input
connection options.

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OUTPUTS
T e speaker outputs are via Neutrik Speakon connectors: 2-pole (NL2FC) or 4-pole (NL4FC) connectors
can be used. Terminations (all connectors) are as follows:-
Pin +1 = +ve signal output
Pin -1 = -ve signal output
For ease of installing bi-amped or bridged speakers, output connector A also carries output B and output
connector C also carries output D. T e terminations are as follows:
Output connector A Pin +1 = +ve c annel A Pin -1 = -ve c annel A
Pin +2 = +ve c annel B Pin -2 = -ve c annel B
Output connector C Pin +1 = +ve c annel C Pin -1 = -ve c annel C
Pin +2 = +ve c annel D Pin -2 = -ve c annel D
For bi-amped operation connect as above.
For bridged operation connect as follows:
C annels A & B +ve = c annel B +ve (pin +1 on connector B or +2 on connector A)
-ve = c annel A –ve (pin -1 on connector A)
C annels C & D +ve = c annel D +ve (pin +1 on connector D or +2 on connector C)
-ve = c annel C –ve (pin -1 on connector C)
Note: Bot level controls must be set to t e same position.
When operating in bridged mode, the minimum impedances are 8 ohms.
Note: 1. Negative (-ve) output terminals must not be joined toget er, since t ey are not bot at 0V.
2. Because t e currents involved are very ig , t e speaker cables s ould conform to t e
following minimum requirements, ot erwise t e losses will cause t e cables to get ot and
audio power will be reduced:
E100 - 14A into 4 o m speaker loads.
3. Do not connect t e inputs/outputs to any ot er voltage source suc as a battery,
mains source or power supply, regardless of w et er t e amplifier is turned on or off.
3. Do not run t e output of any amplifier c annel back into anot er c annel’s input and do not
parallel or series-connect an amplifier output wit any ot er amplifier output.

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Operation
SWITCHING ON
At ‘switc -on’ t e protection circuit will initially activate w ilst t e circuits stabilise. Assuming no faults
are detected after a few seconds, only t e ‘POWER’ LED and active “Link” LEDs (and ‘SIGNAL’ indicators
if signal is applied) will be illuminated.
PANEL CONTROLS AND INDICATORS
Level controls
T ese are analogue controls allowing precise level settings. Note t at if c annel link LEDs are
illuminated, some controls may not operate – please refer to previous section explaining t e operation of
t e Input Link Switc es.
Signal Indicators (3 Green LEDs)
T ese are active from a minimum output level of approximately 10 Watts and are only an indication of
signal level.
-3dB Indicators (yellow LED)
T ese are active w en t e signal is 3dB below t e limiting level.
Limiter/OCM Indicators (Red LED)
T e E Series amplifiers incorporate signal limiters, w ic are preset to prevent clipping wit ig levels
of drive. T e red LEDs on t e front panel illuminate to indicate operation of t e limiters. T e output
current monitor (OCM) may activate to limit t e output current of t e amplifier c annel - t is can occur
even if t e amplifier as not reac ed clipping point. T e OCM indicator can operate independently of
t e bargrap meter. Typical conditions t at may trigger t e OCM circuitry would be too low a load
impedance, or ig subsonic or VHF levels.
PRC Indicators (green LED)
T ese indicate w en t e PRC circuit for t at specific c annel as been selected wit t e rear panel
switc es.
Temperature Control
T e cooling fans respond to temperature sensors wit in t e unit to maintain a safe operating
temperature. In t e event of excessive temperature, t e protection circuit will operate, disabling t e
output. T e red ‘AUDIO-PROTECT’ (A/P) LED will indicate t is condition. (See fault indicator.)
T ere are 2 fans connected permanently wit variable speed.

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Normal dynamic signals will not cause the amplifier to overheat unless the ventilation is
inadequate. (See installation section and maintenance section.)
Fault Indicator (Audio Protection – red LED)
If t e outputs are s orted or if DC is present, t e protection circuit will disengage t e outputs and t e
A/P LED will illuminate. T e amplifier will continue to be monitored and depending on t e type of fault,
will eit er reset after t e fault as cleared or require manual resetting by switc ing off at t e mains
switc and t en on again after a few seconds. (See also temperature control above).
Temperature related faults will reset once t e unit as cooled sufficiently.
Output s ort circuits will require manual reset after clearing t e fault. S ort circuits on eit er c annel
will affect t e individual c annel. A/P will illuminate toget er wit t e Limit LED on t e s orted c annel.
CH Link LED (amber)
T ese indicate t e position of t e input link switc es on t e rear panel and are illuminated w en
relevant CH Link mode is selected wit t e switc pressed in.

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Maintenance
CAUTION: These servicing instructions are for use by qualified personnel only. Ensure that
Electrical power to the unit is disconnected before carrying out any maintenance.
GAIN/SENSITIVITY SETTINGS
Gain settings are c anged internally by simple jumper links. Four rows of pins marked - GAIN A and
GAIN B - are situated on t e input PCB (PCB741). A jumper link sets t e gain and t e settings are as
follows:
Link 1 & 2 gives 26dB gain = +16dBu/4.9V sensitivity
Link 2 & 3 gives 32dB gain = +10dBu/2.5V sensitivity
Link 3 & 4 gives 36dB gain = +6dBu/1.5V sensitivity
NOTE: Factory setting is normally link 2 & 3 = 32dB gain.
Setting ig er gain does not c ange t e maximum available power but c anges t e level of signal input
to ac ieve maximum power. In any case, provided t at t e input signal is less t an 20dBu/7.7V, t e
built in limiter circuit will prevent distortion wit in t e amplifier.
T e gain s ould be set to matc t e signal from t e source, e.g. mixer, controller, equaliser etc.
AIR FILTER
T e filter be ind t e air intake apertures on t e front of E SERIES amplifiers s ould be cleaned or
replaced periodically, e.g. 3-6 mont s. (Filters in amplifiers located in more 'dirty' atmosp eres may
require more frequent maintenance). Access is via t e blue front panel retained by 2.5mm Hex screws.
T e filter s ould be 'dry' cleaned, using a vacuum cleaner preferably. Running t e unit wit out a filter is
not recommended unless it is wit in a 'clean room'. Replacement filter material is available.
No ot er regular maintenance is required.
If you have any doubt about carrying out this procedure, refer to a service engineer or
contact your dealer.
IF OUR AMPLIFIER DEVELOPS A FAULT, PLEASE REFER TO OUR SUPPLIER FOR SERVICE
AND TECHNICAL SUPPORT. DO NOT ATTEMPT TO REPAIR THE FAULT OURSELF AS THIS
WILL INVALIDATE THE WARRANT .

15
TECHNICAL SPECIFICATION
Output power (Watts RMS)
per c annel
8 o ms @ 1kHz 1400
4 o ms @ 1kHz 2800
2 o ms @ 1kHz 3700
Mono Bridged
8 o ms @ 1kHz 5300
4 o ms @ 1kHz 17400
THD @ rated power
4 o ms 1 kHz <0.08%
20Hz-20 kHz <0.15%
Input CMRR >80dB
Hum & Noise -110dBA
Gain (selectable) +26dB/+32dB/+36dB
Sensitivity for
rated output, 4 o ms +16dBu (4.9v)/+10dBu(2.5v)/+6dBu(1.5v)
Damping Factor 1 kHz, 8 o ms >400
Frequency response 20Hz-20kHz - +0/-0.5dB
Input impedance (actively balanced) 20k o ms
Dimensions (mm) - 2U 8x482x428
Weig t 11.8kgs
Power requirement 230 VAC @ 20 amps max
115 VAC @ 40 amps max
Power requirements
T e E100 can be supplied for nominal mains voltage of 115V or 230V.
An internal link can be set to eit er 100V or 120V for t e 115V version and 220V or 240V for t e 230V
version. Normally t ese are set to 120V and 240V respectively.
This amplifier will only operate to its very high specification if it is installed and operated
as described in this manual.

16
APPENDIX
Table of PRC settings and resulting Output – E100
E100E100
E100
Output Per C annel (Watts) Bridged Mode (Watts)
Max Power into 8o m 1400 5300
-2dBu PRC Setting 980 3700
-4dBu PRC Setting 560 2100
-6dBu PRC Setting 310 1175
Max Power into 4o m 2800 7400
-2dBu PRC Setting 1950 5160
-4dBu PRC Setting 1110 2940
-6dBu PRC Setting 620 1640
Max Power into 2o m 3700 N/A
-2dBu PRC Setting 2580 N/A
-4dBu PRC Setting 1470 N/A
-6dBu PRC Setting 820 N/A