MTX Thunder TH90.4 User manual

TH90.4
4-Channel Class-AB Power Amplifier
Designed by MTX in the USA
www.mtx.com

English mtx.com
Owner’s Manual - TH90.4
Introduction
Thank you for purchasing an MTX Audio Hi-Performance amplier. Proper installation matched with MTX
speakers and subwoofers provide superior sound and performance for endless hours of enjoyment whether
you are waking the neighbors or just out enjoying your tunes. Congratulations and enjoy the ultimate audio
experience with MTX!
Specications :
t$IBOOFM$MBTT"#"NQMJöFS
t$&"DFSUJöFE1PXFS0VUQVU
 XBUUT3.4YDIBOOFMBUPINBOE5)%/ź
 XBUUT3.4YDIBOOFMBUPINBOE5)%/ź
 XBUUT3.4YDIBOOFMBUPINBOE5)%/ź
t$SPTTPWFS
 )JHIQBTTE#PDUWBSJBCMFGSPN)[UP)[
 -PXQBTTE#PDUWBSJBCMFGSPN)[UP)[
t4JHOBMUP/PJTF3BUJPXBUUE#
t5)%/PJTF%JTUPSUJPOXBUUź
t'SFRVFODZ3FTQPOTFE#)[)[
t.BYJNVN*OQVU4JHOBM7
t.BYJNVN4FOTJUJWJUZN7
t%JNFOTJPOTJOYJOYJO
t)JHIMFWFMJOQVUT
Control Panel
FRONT REAR
HPF LPF
FRONT
REAR
6V 0.1V
6V 0.1V
40Hz 400Hz
HP FULL LP
HP FULL LP 40Hz 400Hz
40Hz 400Hz
40Hz 400Hz
HLI
+ - G - +
FR FL
+ - G - +
RR RL
POWER
FRONT
REAR
SPEAKER
R+ R- L+ L-
BRIDGE
+-
GAIN X-OVER
POWER/
PROTECT

Control Panel :
(BJO$POUSPM("*/5IFHBJODPOUSPMNBUDIFTUIFJOQVUTFOTJUJWJUZPGUIFBNQMJöFSUPUIFTPVSDFVOJUCFJOHVTFE
5IFPQFSBUJOHSBOHFWBSJFTGSPNNWUP7
Adjusting the gain
5VSOUIFHBJODPOUSPMPOUIFBNQMJöFSBMMUIFXBZEPXODPVOUFSDMPDLXJTF
5VSOVQUIFWPMVNFDPOUSPMPOUIFTPVSDFVOJUUPBQQSPYJNBUFMZcPGNBYJNVN
"EKVTUUIFHBJODPOUSPMPOUIFBNQMJöFSVOUJMBVEJCMFEJTUPSUJPOTPDDVST
"EKVTUUIFHBJODPOUSPMEPXOVOUJMBVEJCMFEJTUPSUJPOEJTBQQFBST
5. The amplier is now calibrated to the output of the source unit.
-PX1BTT)JHI1BTT90WFS4XJUDI907&3
*Oi-1'wQPTJUJPOUIFBDUJWFMPXQBTT-1YPWFSJTUVSOFEPO
*Oi)1'wQPTJUJPOUIFBDUJWFIJHIQBTT)1YPWFSJTUVSOFEPO
*Oi'6--wQPTJUJPOUIFYPWFSJTUVSOFEPò
)JHI1BTT90WFS'SFRVFODZ$POUSPM)1'
6TFEUPTFMFDUUIFEFTJSFEIJHIQBTT)1YPWFSGSFRVFODZ5IFGSFRVFODZJTBEKVTUBCMFGSPN)[UP)[
-PX1BTT90WFS'SFRVFODZ$POUSPM-1'
6TFEUPTFMFDUUIFEFTJSFEMPXQBTT-1YPWFSGSFRVFODZ5IFGSFRVFODZJTBEKVTUBCMFGSPN)[UP)[
3$"*OQVUT*/1655IFTF3$"JOQVUTBSFVTFEXJUITPVSDFVOJUTUIBUIBWF3$"PS-JOFMFWFMPVUQVUT4PVSDF
VOJUTOFFEBNJOJNVNMFWFMPGN7PVUQVUGPSQSPQFSPQFSBUJPOPGUIFBNQMJöFS
.59 SFDPNNFOET POMZ IJHI RVBMJUZ UXJTUFE QBJS DBCMFT TVDI BT 4USFFU8JSFT UP EFDSFBTF UIF QPTTJCJMJUZ PG
radiated noise entering the system.
5IF1PXFS-&%XJMMJMMVNJOBUFXIFOUIFVOJU IBTQPXFSGSPNB7TPVSDFBOE7JTBQQMJFEUPUIF SFNPUF
UFSNJOBM5IF1PXFS-&%XJMMCMJOLXIFOUIFBNQMJöFSFOUFSTQSPUFDUNPEFEVFUPBOFMFDUSJDBMTIPSUPSFYDFTTJWF
UIFSNBMJODJEFOUTFF5SPVCMFTIPPUJOH
4QFBLFSMFWFMJOQVUT)-*5IJTJOQVUXJMMBMMPXUIFBNQMJöFSUPPQFSBUFGSPNTPVSDFVOJUTXJUITQFBLFSMFWFM
PVUQVUT0VUQVUTQFBLFSMFBETGSPNUIFTPVSDFVOJUTIPVMECFUJFEEJSFDUMZUPUIFXJSFIBSOFTTQSPWJEFEXJUI
the amplier.
/PUF8IFOTQFBLFSMFWFMJOQVUTBSFVTFEBSFNPUFUVSOPOXJSFNVTUCFVTFEUPTXJUDIUIFBNQMJöFS0OBOE0ò
1PXFS5FSNJOBM#"555IJTJTUIFNBJOQPXFSJOQVUGPSUIFBNQMJöFSBOENVTUCFDPOOFDUFEEJSFDUMZUPUIFQPTJUJWF
UFSNJOBMPGUIFWFIJDMFTCBUUFSZGPSQSPQFSPQFSBUJPO6TFDBVUJPOXIFOJOTUBMMJOHQPXFSDBCMFJOUIFWFIJDMF
"WPJESVOOJOHUIJTDBCMFQBSBMMFMXJUI3$"DBCMFTBOUFOOBTPSPUIFSTFOTJUJWFFRVJQNFOUEVFUPNBTTJWFDVSSFOUT
UIBUDBOJOEVDFOPJTFJOUPUIFBVEJPTZTUFN*UJTBMTPWFSZJNQPSUBOUUPIBWFBUJHIUTFDVSFDPOOFDUJPOGPSNBYJNVN
QFSGPSNBODF.59SFDPNNFOETVTJOH"8(QPXFSXJSFXJUIUIF.595)BNQMJöFS
3FNPUF5FSNJOBM 3&.  5IF BNQMJöFS DBO CF UVSOFE PO CZ BQQMZJOH  WPMUT UP UIJT UFSNJOBM 5ZQJDBMMZ UIJT
WPMUBHFJTTVQQMJFECZBXJSFGSPNUIFTPVSDFVOJUNBSLFEiSFNPUFwPSiQPXFSBOUFOOBw
(SPVOE5FSNJOBM(/%"QSPQFSHSPVOEJTSFRVJSFEGPSZPVSBNQMJGJFSUPPQFSBUFBUQFBLQFSGPSNBODF"
short ground cable the same diameter as the power cable should be used to attach the ground terminal
EJSFDUMZUPUIFDIBTTJTPGUIFWFIJDMF"MXBZTSFNPWFQBJOUEJSUPSEFCSJTUPFYQPTFCBSFNFUBMXIFSFUIF
ground will be attached.
4QFBLFS5FSNJOBMT41&",&3$POOFDUTQFBLFSTUPUIFTFUFSNJOBMT0CTFSWFTQFBLFSQPMBSJUZUISPVHIPVUUIF
TZTUFN*NQSPQFSQIBTFDBOSFTVMUJOMPTTPGCBTTSFTQPOTFBOEPSQPPSPWFSBMMTPVOERVBMJUZ
#SJEHF.PEF8IFOCSJEHJOHUIFBNQMJöFSVTFUIFSJHIUQPTJUJWFUFSNJOBMBOEUIFMFGUOFHBUJWFUFSNJOBMPOMZ
Warning EPOPUCSJEHFUIFBNQMJöFSXJUIBOJNQFEBODFMPXFSUIBOPIN
'VTF'64&*GUIFGVTFCMPXTSFQMBDFUIFNXJUIUIFTBNFWBMVF/FWFSVTFBIJHIFSSBUFEGVTF
$BVUJPOGVTFTBSFMPDBUFEVOEFSUIFBNQ

mtx.com
Owner’s Manual - TH90.4
Installation & Mounting
.59SFDPNNFOETZPVSOFX5IVOEFSBNQMJöFSCFJOTUBMMFECZBO"VUIPSJ[FE.59SFUBJMFS"OZEFWJBUJPOGSPN
TQFDJöFEJOTUBMMBUJPOJOTUSVDUJPOTDBODBVTFTFSJPVTEBNBHFUPUIFBNQMJöFSTQFBLFSTBOEPSWFIJDMFTFMFDUSJDBM
TZTUFN%BNBHFDBVTFEGSPNJNQSPQFSJOTUBMMBUJPOJT/05DPWFSFEVOEFSXBSSBOUZ1MFBTFWFSJGZBMMDPOOFDUJPOT
prior to system turn on!
%JTDPOOFDUUIFWFIJDMFTOFHBUJWFCBUUFSZDBCMF
%FUFSNJOFUIFNPVOUJOHQMBDFGPSZPVS.59BNQMJöFS,FFQJONJOEUIFSFTIPVMECFTVóDJFOUBJSøPXGPS
QSPQFSDPPMJOH.BSLUIFNPVOUJOHIPMFTGSPNUIFBNQMJöFSUPCFESJMMFE#FGPSFESJMMJOHNBLFTVSFBMMWFIJDMF
XJSFTHBTMJOFTCSBLFMJOFTBOEHBTUBOLBSFDMFBSBOEXJMMOPUJOUFSGFSFXJUIJOTUBMMBUJPO%SJMMUIFEFTJSFEIPMFT
and mount the MTX amplier.
*OTUBMMBQPTJUJWFQPXFSDBCMFGSPNUIFWFIJDMFTCBUUFSZUISPVHIUIFöSFXBMMVTJOHBHSPNNFUPSöSFXBMM
CVTIJOHUPBWPJEDBCMFEBNBHFGSPNTIBSQFEHFTPGUIFöSFXBMM3VOUIFDBCMFUISPVHIUIFJOUFSJPSPGUIFWFIJDMF
BOEDPOOFDUJUUPUIFBNQMJöFST#"55UFSNJOBM%P/PUDPOOFDUUPUIFCBUUFSZBUUIJTUJNF
/PUF6TFPOMZQSPQFSHBVHFXJSFGPSCPUIQPTJUJWFBOEOFHBUJWFDPOOFDUJPOT
*OTUBMMBDJSDVJUCSFBLFSPSGVTFXJUIJOJOPGUIFCBUUFSZ5IJTFòFDUJWFMZMPXFSTUIFSJTLPGTFWFSFEBNBHFUP
ZPVPSZPVSWFIJDMFJODBTFPGBTIPSUDJSDVJUPSBDDJEFOU.BLFTVSFUIFDJSDVJUCSFBLFSJTTXJUDIFEPòPSUIFGVTF
JTUBLFOPVUPGUIFGVTFIPMEFSVOUJMMBMMDPOOFDUJPOTBSFNBEF/PXDPOOFDUZPVSQPTJUJWFQPXFSDBCMFUPUIF
positive battery terminal of the battery.
(SPVOEJOH-PDBUFBQSPQFSHSPVOEQPJOUPOUIFWFIJDMFTDIBTTJTBOESFNPWFBMMQBJOUEJSUPSEFCSJTUPSFWFBM
a bare metal surface. Attach the ground wire to that contact point. Connect the opposite end of the ground wire
UPUIF(/%UFSNJOBMPOUIF.59BNQMJöFS
$POOFDUB3FNPUF5VSOPOXJSFGSPNUIFTPVSDFVOJUUPUIF.59BNQMJöFST3&.UFSNJOBM*GUIFTPVSDFVOJU
EPFTOPUIBWFBEFEJDBUFE3FNPUF5VSOPOMFBEZPVNBZDPOOFDUUPUIFTPVSDFVOJUT1PXFS"OUFOOBMFBE
$POOFDUJOHTJHOBMDBCMFTUPUIFBNQMJöFS5IFSFBSFUXPXBZTUPTVQQMZUIFTJHOBMUPZPVS.59BNQ
t5PHFUNBYJNVNQFSGPSNBODFXFTVHHFTUDPOOFDUJOHBIJHIRVBMJUZ3$"UPUIFDPSSFTQPOEJOHPVUQVUTBUUIF
source unit and inputs of the amplier.
t*GBTPVSDFVOJUJTCFJOHVTFEXJUIPVU3$"PVUQVUTVTFUIFJODMVEFEIJHIMFWFMBNQMJöFSTTQFBLFSUFSNJOBMT
using the right proper speaker wire.
 $POOFDU ZPVS TQFBLFST UP ZPVS .59 BNQMJöFST TQFBLFS UFSNJOBMT VTJOH UIF QSPQFS HBVHF TQFBLFS XJSF
#SJEHFEDIBOOFMTDBOESJWFBPINNJOJNVNMPBEGPSNBYQPXFS
%PVCMFDIFDLBMMQSFWJPVTJOTUBMMBUJPOTUFQTJOQBSUJDVMBSXJSJOHBOEDPNQPOFOUDPOOFDUJPOT0ODFWFSJöFE
SFDPOOFDUUIFWFIJDMFTOFHBUJWFCBUUFSZDBCMFUVSOUIFDJSDVJUCSFBLFSPOPSQMBDFUIFGVTFJOUIFGVTFIPMEFS
/PUF(BJO-FWFMTPOUIFBNQMJöFSTIPVMECFUVSOFEBMMUIFXBZEPXODPVOUFSDMPDLXJTFCFGPSFQSPDFFEJOH
with adjustments.
English

Troubleshooting
Problem Cause Solution
/P-&%JOEJDBUJPO /P7BUSFNPUFDPOOFDUJPO 4VQQMZ7UPUFSNJOBM
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 *OTVóDJFOUHSPVOEDPOOFDUJPO 7FSJGZHSPVOEDPOOFDUJPO
 #MPXOQPXFSGVTF 3FQMBDFGVTF
1PXFS-&%POOPPVUQVU 7PMVNFPOTPVSDFVOJUPò *ODSFBTFWPMVNFPOTPVSDFVOJU
 4QFBLFSDPOOFDUJPOTOPUNBEF .BLFTQFBLFSDPOOFDUJPOT
 (BJODPOUSPMPOBNQMJöFSPò 5VSOVQHBJO
 4JHOBMQSPDFTTJOHVOJUTPò "QQMZQPXFSUPTJHOBMQSPDFTTPS
 "MMTQFBLFSTCMPXO 3FQMBDFTQFBLFST
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Amplier gain set too high Lower amplier gain
#BMBODFSFWFSTFE 4QFBLFSTXJSFE-3SFWFSTFE 8JSFTQFBLFSTXJUIDPSSFDUPSJFOUBUJPO
 3$"JOQVUTSFWFSTFE 3FWFSTF3$"JOQVU
#BTTJTXFBL 4QFBLFSTXJSFEPVUPGQIBTF 8JSFTQFBLFSTXJUIDPSSFDUQIBTF
 /PUVTJOH.59XPPGFST #VZ.59XPPGFST
#MPXJOHGVTFT &YDFTTJWFPVUQVUMFWFMT -PXFSUIFWPMVNF
 "NQMJöFSEFGFDUJWF 3FUVSOGPSTFSWJDF

MTX is proud to be an American Audio Company.
© 2011 Mitek. All rights reserved
MTX, COUSTIC, XTANT, STREETWIRES and THUNDER
are registered trademarks of Mitek
Due to continual product development, all
specications are subject to change without notice.
MTX004237 12/11
NDM646
Mitek - MTX
4545 East Baseline Rd. Phoenix, AZ 85042, USA
MTX is a proud member of Mitek Corp high
quality consumer audio product lines.

Mitek Mobile Limited Warranty
Our Guarantee
Mitek Mobile products (including MTX, Streetwires, Coustic and Magnum) purchased in the USA after
1/1/2013 from an authorized Mitek retailer are guaranteed to be free from material defects in products
and workmanship for five (5) years to the original end user purchaser, subject to the terms and conditions
below.
Length of Limited Warranty and Remedy
The warranty period begins the day the product is purchased by the end user, and is limited to the original
retail purchaser of the product.
Free Replacement Period (2 Years)
Products found to be defective in materials or workmanship during the first 2 years will be, at Mitek's
option, repaired or replaced by Mitek at no charge. When a product is replaced during first 2 years, the
warranty does not renew, it continues on from the original date of purchase.
Proration Period (Years 3-5)
The prorated purchase price of any product which becomes defective after the first two years and prior to
the end of the warranty period may be credited toward the purchase of a new Mitek product. The amount
of the proration shall be determined by dividing the purchase price by the number of months of the
warranty period (60), and then multiplying the result by the number of months remaining in the warranty
period. Any partial months will be rounded to the nearest whole month. For example, a product purchased
37 months ago for $100 would be calculated by dividing $100 by 60 months = $1.66/month, multiplied by
23 (the months remaining in the warranty period) for a prorated warranty amount of $38.33.
You are responsible for all costs for removal, reinstallation and proper packaging, shipping, insurance or
other freight charges incurred in the shipment of the product or part to Mitek. Mitek will ship the repaired
or replaced Mitek product or replacement parts to you at no charge. Mitek reserves the right to utilize
reconditioned, refurbished, repaired or remanufactured products or parts in the warranty repair or
replacement process. Such products and parts will be comparable in function and performance to an
original product or part and warranted for the remainder of the original warranty period.
What Is Not Covered
This warranty does not cover the product if it has been subject to neglect, abuse, misuse, incorrect
connection, or if it has been subject to unauthorized repair or alterations of any nature, or if the serial
number has been altered or removed, and the warranty does not extend to cosmetics or finish. This
warranty only applies to products installed and used in the USA.
What You Must Do to Obtain Warranty Service
You must contact Mitek Warranty via our website at MTX.com, or via email at
[e-mail], or by calling 800-556-2888. If you did not purchase the product directly from
Mitek, a proof of purchase must be provided in order to receive warranty consideration. You will be issued
a Return Authorization (RA) number which must be written on the outside of the package before returning
the product to Mitek.

No Other Warranties
THE LIMITED WARRANTIES DESCRIBED ABOVE ARE EXCLUSIVE AND IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. MITEK DISCLAIMS AND EXCLUDES ALL OTHER EXPRESS
WARRANTIES, AND DISCLAIMS AND EXCLUDES ALL WARRANTIES IMPLIED BY LAW, INCLUDING
WITHOUT LIMITATION THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. TO THE EXTENT THAT APPLICABLE LAW PROHIBITS THE EXCLUSION OF IMPLIED
WARRANTIES, THE DURATION OF ANY APPLICABLE IMPLIED WARRANTY IS LIMITED TO THE
PERIOD SPECIFIED FOR THE EXPRESS WARRANTY. Some states do not allow limitations on how
long an implied warranty lasts, so the above limitation may not apply to you. Any oral or written
description of any Mitek product is for the sole purpose of identifying it and shall not be construed as an
express warranty.
Limitation of Liability
MITEK'S OBLIGATION TO PROVIDE A CREDIT, OR REPAIR OR REPLACE AT MITEK'S OPTION,
SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY UNDER THIS LIMITED WARRANTY AND
MITEK'S SOLE AND EXCLUSIVE OBLIGATION. MITEK SHALL NOT BE LIABLE FOR INCIDENTAL,
INDIRECT, CONSEQUENTIAL OR SPECIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH
THE MITEK PRODUCT, ITS USE OR PERFORMANCE. Incidental damages include, but are not limited
to, such damages as loss of time and loss of use. Consequential damages include, but are not limited to,
the cost of repairing or replacing other property which was damaged if the Mitek product does not work
properly.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may
also have other rights, which vary from state to state. This limited warranty supersedes all prior warranties
and is not transferable from the original consumer purchaser.
Any assistance Mitek provides to or procures for you outside the terms, limitations or exclusions of this
limited warranty will not constitute a waiver of such terms, limitations or exclusions, nor will such
assistance extend or revive the warranty. Mitek will not reimburse you for any expenses incurred by you
in repairing or replacing any defective product, except for those incurred with Mitek's prior written
permission.