RFL4120 - Car stereo MTX Audio - Free user manual and instructions

Product Type	4-Channel Class AB Amplifier
Brand	MTX Audio
Model	RFL4120
Dimensions (L x W x H)	525 mm x 204 mm x 59 mm
Estimated Weight	4 kg
Power Supply	+12V battery, 50 mm² fuse recommended
RMS Power (CEA2006)	4 x 200 W @ 2 ohms, 4 x 120 W @ 4 ohms, 2 x 400 W bridged @ 4 ohms
Peak Power	3200 W
Frequency Response	10 Hz - 90 kHz (±1 dB)
Signal-to-Noise Ratio	> 98 dB (1 W)
Total Harmonic Distortion (THD+N)	≤ 0.05% (1 W)
Input Sensitivity Level	200 mV to 6 V
High-Pass Filter (HPF)	12 dB/oct, 40 Hz - 5 kHz
Low-Pass Filter (LPF)	24 dB/oct, 40 Hz - 5 kHz
Band-Pass Filter (BPF)	12/24 dB/oct, 40 Hz - 5 kHz
Minimum Output Impedance	2 ohms stereo, 4 ohms bridged
Protection	Fuse, short circuit protection
Input Connectivity	RCA (high and low level)
Output Connectivity	Screw terminals
Special Features	Remote EBC control, bridged mode, input selector
Maintenance and Cleaning	Clean with a soft, dry cloth. Avoid liquids.
Safety	Disconnect battery before installation. Use an appropriate fuse.
Spare Parts and Repairability	Replacement fuses. Repair by a professional.

Frequently Asked Questions - RFL4120 MTX Audio

How to set the amplifier gain?

Set the gain by turning the GAIN potentiometer counterclockwise to minimum. Raise the source volume to 3/4, then increase the gain until you hear distortion, then reduce it slightly.

What to do if the amplifier does not turn on?

Check that the REM terminal receives +12V, that + BATT is powered, that the ground is good, and that the fuse is not blown. Replace the fuse with one of the same rating.

How to wire in bridged mode?

Use the terminals marked Bridge on the terminal block. The minimum impedance in bridged mode is 4 ohms. Do not go below.

How to connect multiple speakers to the same channel?

You can use an input selector to feed the amplifier with a single RCA pair. For outputs, respect the minimum impedance (2 ohms stereo, 4 ohms bridged).

What type of cable to use for power?

MTX recommends a 50 mm² cable for power and ground. For RCA, use quality twisted cables to avoid noise.

How to adjust the low-pass or high-pass filter?

Use the LP X-over and HP X-over switches to activate the filters, then the potentiometers to set the cutoff frequency from 40 Hz to 5 kHz.

What to do in case of distorted sound?

Distortion is often due to excessive gain or too high source volume. Reduce the gain or the source volume.

How to connect the amplifier ground?

Find a ground point on bare metal (scraped), as short as possible. Use a cable of the same gauge as the power (50 mm²). Tightly screw.

Where to install the main fuse?

Install a fuse and fuse holder within 20 cm of the vehicle battery. This is essential protection against short circuits.

How to use the EBC remote?

Connect the provided EBC remote into the dedicated port on the amplifier. It allows adjusting the subwoofer level from the front seats.

USER MANUAL RFL4120 MTX Audio

High-End 4-Channel Class-AB Amplifier - 800W RMS - 3200W Peak

Designed by MTX in Phoenix, AZ - USA

Thank you for purchasing an MTX Audio High-End amplifier. Proper installation matched with MTX speakers and subwoofer provide superior sound and performance for endless hours of waking the neighbors, slammin' your friends or flat out stomping wanna-be players. Congrats and enjoy the ultimate audio experience with MTX!

Specifications :

• 4-Channel Class-AB amplifier
• CEA2006 certified Power Output :
• 200 Watts RMS x 4-channels at 2 ohm and THD + N ≤ 1%
• 120 Watts RMS x 4-channels at 4 ohm and THD+N ≤ 1%
• 400 Watts RMS bridged x 2 at 4 ohm and THD+N ≤1%
  Crossover:
• High pass 12dB/occt variable from 40Hz to 5000Hz
• Low pass 24dB/occt variable from 40Hz to 5000Hz
• Band pass 12dB-24dB/oc't variable from 40Hz to 5000Hz
• Signal-to-Noise Ratio (1 Watt): > 98dB
• THD+Noise (Distortion) (1 Watt): ≤ 0,05%
  Frequency Response (± 1dB) : 10Hz - 90000Hz
  Maximum Input Signal: 6V
  Maximum Sensitivity: 200mV
• EBC remote control
• Dimensions : 525mm x 204mm x 59mm

Controls and Inputs :

RCA Inputs - These RCA inputs are used with head units that have RCA or Line level outputs (head units need a minimum level of 200mV output for proper operation of the amplifier).

MTX recommends only high quality RCA cables to decrease the possibility of radiated noise entering the system.

Gain Control - The gain control matches the input sensitivity of the amplifier to the head unit being used. The operating range varies from 200mv to 6V.

Adjusting the gain

1. Turn the gain control on the amplifier all the way down (counter clockwise).
2. Turn up the volume control on the head unit to approximately 3/4 of maximum.
3. Adjust the gain control on the amplifier until audible distortion occurs.
4. Adjust the gain control down until audible distortion disappears.
5. The amplifier is now calibrated to the output of the head unit.

Low Pass X-Over Switch -Turns the active low pass (LP) x-over on and off. When engaged (On) the x-over is "ON", when disengaged (Off) the x-over is "OFF"
Low Pass X-Over Frequency Control - Used to select the desired low-pass (LP) x-over frequency. The frequency is adjustable from 40Hz to 5000Hz.
High Pass X-Over Switch - Used to turn on the active high-pass (HP) x-over on and off. When engaged (On) the x-over is "ON", when disengaged (Off) the x-over is "OFF".
High Pass X-Over Frequency Control - Used to select the desired high-pass (HP) x-over frequency. The frequency is adjustable from 40Hz to 5000Hz.

Band Pass X-Over: To use, turn "ON" the LP (3) and HP (5) x-overs at the same time, creating a band-pass x-over for kick woofers or midranges. You can tune the filter with frequency controls (4) and (6).
Input Switch: If the head unit is equipped with 4 RCA outputs (2 front and 2 rear), use the ch-3 ch-4 mode and connect the 4 RCA outputs to the ch-1 ch-2 ch-3 ch-4 RCA inputs on the amp. If only 2 RCA outputs are available from the head unit, use the ch-1 ch-2 mode and connect the RCA outputs to the ch-1 and ch-2 inputs of the amp.
EBC Port (External Bass Control) - The Remote Subwoofer Level Control (EBC) plugs directly into this port, while the EBC itself can be placed anywhere in the vehicle for on demand bass adjustments. EBC is included.

Ground Terminal - A proper ground is required for your amplifier to operate at peak performance. A short ground cable the same diameter as the power cable should be used to attach the ground terminal directly to the chassis of the vehicle. Always remove paint, dirt or debris to expose bare metal where the ground cable will be attached.
Remote Terminal - The amplifier can be turned on by applying 12 volts to this terminal. Typically this voltage is supplied by a wire from the source unit marked "remote" or "power antenna".
(+12) Power Terminal - This is the main power input for the amplifier and must be connected directly to the positive terminal of the vehicles battery for proper operation. Use caution when installing (+12) power cable in the vehicle. Avoid running this cable parallel with RCA cables, antennas, or other sensitive equipment due to massive currents that can induce noise into the audio system. It is also very important to have a tight, secure connection for maximum performance. MTX recommends using 50mm² power wire with the MTX RFL4120 amplifier.
Fuses - When fuses blow, replace them with the same value. Never use a higher rated fuse!
13 Speaker Terminals - Connect speakers to these terminals. Observe speaker polarity throughout the system. Improper phase can result in loss of bass response and/or poor overall sound quality.

Bridge Mode:

When bridging the amplifier, use the Ch1 positive terminal and the Ch2 negative terminal only.

When bridging the amplifier, use the Ch3 positive terminal and the Ch4 negative terminal only.

Warning : do not bridge the amplifier with an impedance lower than 4 ohm.

Installation & Mounting :

MTX recommends your new amplifier be installed by an Authorized MTX retailer. Any deviation from specified installation instructions can cause serious damage to the amplifier, speakers and/or vehicles electrical system. Damage caused from improper installation is NOT covered under warranty. Please verify all connections prior to system turn on!

1. Disconnect the vehicle's negative battery cable.
2. Determine the mounting place for your MTX amplifier. Keep in mind there should be sufficient air flow for proper cooling. Mark the mounting holes from the amplifier to be drilled. Before drilling make sure all vehicle wires, gas lines, brake lines and gas tank are clear and will not interfere with installation. Drill the desired holes and mount the MTX amplifier.
3. Install a positive (+) power cable from the vehicle's battery through the firewall using a grommet or firewall bushing to avoid cable damage from sharp edges of the firewall. Run the cable through the interior of the vehicle and connect it to the amplifier's +BATT terminal. Do Not connect to the battery at this time.
   Note : Use only proper gauge wire for both positive and negative connections.
4. Install a circuit breaker or fuse within 20cm of the battery. This effectively lowers the risk of severe damage to you or your vehicle in case of a short circuit or accident. Make sure the circuit breaker is switched off or the fuse is taken out of the fuse holder until all connections are made. Now connect your positive power cable to the positive battery terminal of the battery.
5. Grounding - Locate a proper ground point on the vehicle's chassis and remove all paint, dirt or debris to reveal a bare metal surface. Attach the ground wire to that contact point. Connect the opposite end of the ground wire to the GND terminal on the MTX amplifier.

Installation & Mounting :

1. Connect a Remote Turn-on wire from the head unit to the MTX amplifier's Remote terminal. If the head unit does not have a dedicated Remote Turn-on lead, you may connect to the head unit's Power Antenna lead.
2. Connect RCA cables from the head unit to the MTX amplifier's RCA inputs. Run all signal cables away from vehicle wiring, computers and power cables. If cables must be crossed do so at a 90^ angle. Use only high quality RCA cables to decrease radiated noise from entering the system.
3. Connect your speakers to your MTX amplifier's speaker terminals using the right gauge speaker wire. Two channels bridged can drive a 4 ohm minimum load for max power.
4. Double check all previous installation steps, in particular, wiring and component connections. Once verified, reconnect the vehicle's negative battery cable, turn the circuit breaker on or place the fuse in the fuse holder.

Note : Gain Levels on the amplifier should be turned all the way down (counter clockwise) before proceeding with adjustments.

Troubleshooting :

Problem

Cause

Solution

No LED indication No +12V at remote connection Supply +12V to terminal No +12V at Power connection Supply +12V to terminal Insufficient ground connection Verify ground connection Blown power fuse Replace fuse

Power LED on, no output Volume on head unit off Increase volume on head unit
Speaker connections not made Make speaker connections
Gain control on amplifier off Turn up gain
Signal processing units off Apply power to signal processor
All speakers blown Replace speakers

Output distorted Head unit volume set too high Lower head unit volume Amplifier gain set too high Lower amplifier gain

Balance reversed Speakers wired reversed Wire speakers with correct

RCA inputs reversed

Reverse RCA input

orientation

Bass is weak Not using MTX woofers

Speakers wired out of phase Buy MTX woofers

Wire speakers with correct phase

Blowing fuses Amplifier defective

Excessive output levels Return for service

Lower the volume

How To Stay Tuned :

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Merci!

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https://twitter.com/MTXEurope

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Muchas Gracias!

MTX woofers no son usados

Compra woofers MTX

Fusibles danados

Amplificador defectuoso

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Vielen Dank!

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Grazie!

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http://www.mtxaudio.eu

Obrigado!

Invertas as entradas RCA

Baixos fracos

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Bedankt!

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Cnacn6o!

Cnacn6o, yTO BbIbpanu ycunntenMx Audio Hi-Performance. IpaBnHna yCTaHOBka, a TAKKe KOLOHKn Cu6Byepebl oecneayat HnpeB30dHnBn 3Byk n DOnrme Yacsb 6e3 Cha dNn Baunx cOceJe, a TAKKe 3actabT Baunx npy3e 3abIOBaTn He ocTabT uHcoB conepnKam. POn3dpabnEeM! HacnaxdaTeCb lyuWM 3ByaHMe C MTX Audio!

TexHnueckne xapaKTepeNtMkn :

-4-KaHaJIbHbIy yCmJIteJIb KJIacca AB
ceptnufuipobaaHaa CEA2006 bixoHaHa MoaHocb:
-240 Bt. RMS x 4-KaHaHa Ha 2 Om THD+N ≤1%
-120Br.RMSx4-KaHaHa 4OMTHD+N≤1%
-480Br.RMSx2-KaHaJIHa4OMTHD+N≤1%
-KpoccoBep:
-BY12d/0kT40Γu-5000Γu
-HY24b/okr 40fU-5000fU
-NonocnponyckanHn12d-24dB/OKT 40Γu-5000Γu
-OTHOWeHHe CmHnA-N-WyM (1Bt.):>98n6
-THD+Iomexa（MckaeHne）(1Bt.):≤0,05%
-actoTHaXapaKTePncTnKa（±1b）：10u-90000Tu
-MakcunmaNbBbI BxOdHcRHaN:6B
-MakcHmAbha YyBCTBnteJbHOCTb:200MB
IpoBODHOe DnCTaHUNOHHOy npabneHHe
- Pa3Mepb1:525mm x 204mm x 59mm

Bxodbl npablenne :

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Hactpoika ycneneHHa

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5.Tenepb ycnntenb OTKaHbOpaBH C bixoHbIM CnHraJIOM ITOCHNka.

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High Pass X-Over Frequency Control - Used to select the desired high-pass (HP) x-over frequency. The frequency is adjustable from 40Hz to 5000Hz..

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Cnilobbie n akyctueckne podknoucheHra :

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12 PpeoxpaHnte: Pn cropann peoxpaHnte 3aMeHnte nx Ha aHaonuHbIe. HkoRa Ha 3aMeHnTe nx Ha neoxpaHnte KnaCCOM Bblwe!
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UctahOBka N MOHTaX:

MTX pekomehnyet yctahabnabaB BaH hobbl ycnntteb abTOp3npoBaHbM npedctabnteMe MTX.

Maneiuee OTKIOHHeMe OT CneuaIbIbIX INCTpyKmI NO yCTaHOBe MOKe HAeCTn cepbe3Hb I Bpe ycINTeHIO, DnHaMnKaM n/nn 3JNEKTpuieckOuCteme ABTOMOBn. Ueep6, pnuHHeHbI npHnepaBnBHO yCTaHOBe, HE NOKpbBaETcRAPaHTnei. PoxanyctA, npOBpTe BCE coeMHEnr nepe Bd BkIOUeHEm CNTeMb!

1. OToCoeHNHTe OToPiAteNbHb Ka6Bb AkkymyIaTopa aBTOMo6nla.
2. OnpeDenntecb c MecTOM MOHTaKa BaUero ycNtTeMa MTX. ImeTe BnuNy, TTo dHaNExkaUero oxNaJdHnne Hno6xoDmIOCTaTOuHbI NOTOK BO3dyxa. OTMBeTe MeTa CbePHeHr OTBepCTn Dn MOHTaKa. IpePe CbePHeHem y6eNTecb, TTo BCE DetAInABTOMoBuHxOaTcB YnCTOTE Hne NOMEwAot YCTAHOBKe. IpocBepNTe OTBepCTn N yCTaHOBtE YCINNTeJIb.
3. IpoBEnIte npOBd nonIOcoBOrO nHTAHnO t AkkymyIaTopa yepe3 noKapHyIO nepeToPOky, cnONb3y yNtIOHauOe KOnbU Onn pe3HOBvO BtynKy dna N36ExaHaN NOBpExdHm npOBoA ocTpBMn KpaAMN noKapHou nepeToPOKn. IpOBeIte npOBdpe3 caNoH abTomobnHn IOCoEHNHTe K pa3bemy +BATYcunnten. He noDcoEHNHTeC b AkkymyIaTopy B 3OT MOMENT.
   PpHmEaHHe: nCnObl3yIte TOnbKO npoBOKy nOxOJaIero pa3Mepa, KaK dNn pIOca, TaK nDn MInHyCa.
4. yctahobntpepeoxpahnteb h paacctoaHm 20cm ot akkymnTopa.3TO nOMOKET 3auNTb ABTOMoBnbpn 3aMbkaHm. He BkIOuatae BbIKIOUATEnb H e yCTaHabNBAutepepeoxpahnteb, noka he 6ydyT bblONHehB BCE noDCoeHNHeHn. Tenepb NOKNHOHTe npBOD PIIIOCOBOI NTAHM K NIOCOBOI KJILOMME AKKMYJTopa.
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yctahOBka m MoHTaK :

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8. IIOcoeMHInTe Baun DnHAMNK K pa3bEaMa M DnHAMNKOB ycHNTeMa MTX, NcNpOb3yra NoxOJaUy npoBOnky. BycuHNTe ectb Da npapannenbHbIX pa3bEma DnHAMKAs, noNoXHTeNBHy n OtpuaTeNBHy dna OndHO Byepa n PaKynbTaTHBBHy bTOpoi KOMNKeT PNOXHTeNBHorO n OTPuaTeNBHO p3bEMoB dna CoCTaba nDByx Byepob. MnHmAbHa Harpy3ka dny yCnuNTe -20M.
9. Ipe npoepebte BCE npdbdyuime wann no yctahOBke, ocoeHNO npobOda n coedHHeHH. Nocle npoebpkn 3aHO BO NOcOeHNHTe OtpnataBn Kaebn akymyIATOpA, BkNCHTe bblKIOHaTeB nnn yCTaHOBTne pnpdoxpaHntB.

PpmeHne : PerynIaTOpbl yCmEnHa yCmInTeJax HxKHO noBepHyb do npedena (npoTMb yacoboi ctpenKn) nepei npdoJXeHHem HaCTpOKn.

YcTpaHHeHHeNcnpaBHOCTeI:

Ipo6nema

PpMnHa

PeeHne

Het HnHnKAtopa LED OTCyTCTByeT +12B npu ydaenHHo NpOKnHoueHN NpOKnHouHe +12B K TePMnHaIy

OTcyTCTByET +12B p3a3bEme nHTaHnI PoKKnOHTe +12K TepMnHaJy

Heoctatoohoe3aemnneHnePpOBepeTe 3aemnne

CropaHne npedoxpaHnte 3amehTe npedoxpaHnteB

LED BkHoueH, HET BHeHrero CmHraJa BbKIOUeH 3ByK NCTOuHnKa CmHraJa D06aBbTe rPoMkoctb Ha NCTOuHnke

CnHana

He npdknlouehbl DnHaMnKn PnpkIouHte DnHaMnKn

BbKJIuOeH KOHTpObl ycIeHn BkIouHte ero choBa

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https://www.facebook.com/MTXEurope

https://twitter.com/MTXEurope

http://www.mtxaudio.eu

Multumesc!

V a multumim penta anui amplificator audio MTX High-End. Instalare corecta, impreuna cu difuzoare si subwooerele MTX va vor oferi un sunet si o performanta de exceptie pentru nenumarate ore de trezire a vecinilor. Felicitari si sa va bucurati de inalta experienta audio cu MTX!

Specificatii:

• Amplificator 4 canale, Clasa-AB
• Putere de cesire certificata CEA2006 :
  -200 Watts RMS x 4-canale la 2 ohmi si THD+N≤1%
• 120 Watts RMS x 4-canale la 4 ohmi si THD+N≤1%
• 400 Watts RMS in punte x 2 la 4 ohmi si THD+N ≤1%
  Crossover:
• High pass 12dB/act variabil de la 40Hz la 5000Hz
• Low pass 24dB/act variabil de la 40Hz la 5000Hz
• Band pass 12dB-24dB/ocf variabil de la 40Hz la 5000Hz
• Raportul semnal/zgomot (1 Watt): > 98dB
• THD+Noise (Distorsiuni) (1 Watt): ≤ 0,05%
  Raspuns in freventa (± 1dB) : 10Hz - 90000Hz
  Semnal intraramexim:6V
  Sensibilitate maxima:200mV
  Telecomanda EBC
• Dimensiuni : 525mm x 204mm x 59mm

https://www.facebook.com/MTXEurope

https://twitter.com/MTXEurope

http://www.mtxaudio.eu

m5

AUDIO

MTX is proud to be an American Audio Company since 1971.

MTX is a proud member of Mitek Corp high quality consumer audio product lines.

Designed and Engineered by Mitek in Phoenix-AZ,USA.Assembled in PRC.

© 2022 Mitek. All rights reserved. MTX is a registered trademarks of Mitek.

Due to continual product development, all specifications are subject to change without notice.

Mitek-MTX-4545 East Baseline Rd. Phoenix, AZ 85042, USA

Mitek-MTX-23 rue des Apennins 75017 Paris, France-Tel: [phone]

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