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HM-54

HM-54

1.

  Read these instructions.  

2.

  Keep these instructions.

3.

  Heed all warnings.

4.

  Follow all instructions.

5.

  Do not use this apparatus near water.

6.

  Clean only with dry cloth.

7.

  Do not block any 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 are provided for your safety. If the 

provided plug does not fit into your outlet, consult an electrician for 

replacement of the obsolete outlet.

10.

 Protect the power cord from being walked on or pinched particularly at 

plugs, convenience receptacles, and the point where they exit from the 

apparatus.

11.

 Only use attachments/accessories specified by the manufacturer.

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 tip-over.

13.

 Unplug this apparatus during lightning storms or when unused for long 

periods of time.

14.

 Refer all servicing to qualified service personnel. Servicing is required 

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.

15.

 This apparatus shall not be exposed to dripping or splashing, and no 

object filled with liquids, such as vases, shall be placed on the apparatus.

16.

 This apparatus has been designed with Class-I construction and must 

be connected to a mains socket outlet with a protective earthing con-

nection (the third grounding prong).

17.

 This apparatus has been equipped with a single-pole, rocker-style AC 

mains power switch. This switch is located on the front panel and 

should remain readily accessible to the user.

18.

 This apparatus does not exceed the Class A/Class B (whichever is 

applicable) limits for radio noise emissions from digital apparatus as 

set out in the radio interference regulations of the Canadian Department 

of Communications.

ATTENTION

 — 

Le présent appareil numérique n’émet pas de bruits 

radioélectriques dépassant las limites applicables aux appareils numériques de 

class A/de class B (selon le cas) prescrites dans le réglement sur le brouillage 

radioélectrique édicté par les ministere des communications du Canada.

19.

 Exposure to extremely high noise levels may cause permanent hearing 

loss. Individuals vary considerably in susceptibility to noise-induced 

hearing loss, but nearly everyone will lose some hearing if exposed to 

sufficiently intense noise for a period of time. The U.S. Government’s 

Occupational Safety and Health Administration (OSHA) has specified 

the permissible noise level exposures shown in the following chart.

  According to OSHA, any exposure in excess of these permissible limits 

could result in some hearing loss. To ensure against potentially danger-

ous exposure to high sound pressure levels, it is recommended that all 

persons exposed to equipment capable of producing high sound pres-

sure levels use hearing protectors while the equipment is in operation. 

Ear plugs or protectors in the ear canals or over the ears must be worn 

when operating the equipment in order to prevent permanent hearing 

loss if exposure is in excess of the limits set forth here. 

Important Safety Instructions

WARNING — To reduce the risk of fire or 

electric shock, do not expose this apparatus 

to rain or moisture.

Duration Per Day 

 Sound Level dBA, 

Typical 

  In Hours 

Slow Response 

Example

 

90 

Duo in small club

 

92 

 

 

95 

Subway Train

 

97

 

100 

Very loud classical music

 

  1.5 

102

 

105 

Tami screaming at Adrian about deadlines

 

0.5  

110

 

 0.25 or less 

115 

Loudest parts at a rock concert

PORTABLE CART WARNING

Carts and stands - The

Component should be used

only with a cart or stand

that is recommended by

the manufacturer.

A Component and cart

combination should be

moved with care.  Quick

stops, excessive force, and

uneven surfaces may cause

the Component and cart

combination to overturn.

CAUTION    

AVIS

RISK OF ELECTRIC 

SHOCK 

DO NOT OPEN

RISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK

DO NOT REMOVE COVER (OR BACK)

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

ATTENTION: POUR EVITER LES RISQUES DE CHOC

ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE.  AUCUN

ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER.  CONFIER

L'ENTRETIEN AU PERSONNEL QUALIFIE.

AVIS: POUR EVITER LES RISQUES D'INCENDIE OU

D'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE 

A LA PLUIE OU A L'HUMIDITE

   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 sufficient magnitude to constitute a risk of electric shock to persons.

   Le symbole éclair avec point de flèche à l'intérieur d'un triangle 
équilatéral est utilisé pour alerter l'utilisateur de la présence à 
l'intérieur du coffret de "voltage dangereux" non isolé d'ampleur 
suffisante pour constituer un risque d'éléctrocution.

   The exclamation point within an equilateral triangle is intended to 
alert the user of the presence of important operating and maintenance 
(servicing) instructions in the literature accompanying the appliance.

   Le point d'exclamation à l'intérieur d'un triangle équilatéral est 
employé pour alerter les utilisateurs de la présence d'instructions 
importantes pour le fonctionnement et l'entretien (service) dans le 
livret d'instruction accompagnant l'appareil.

Summary of Contents for HM-54

Page 1: ... ...

Page 2: ...ed hearing loss but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a period of time The U S Government s Occupational Safety and Health Administration OSHA has specified the permissible noise level exposures shown in the following chart According to OSHA any exposure in excess of these permissible limits could result in some hearing loss To ensure against potenti...

Page 3: ...nnections 5 SettheLevels 5 HookupDiagrams 6 HM 54Features 8 FrontPanel 8 1 MAININPUTLEVEL 8 2 PHONESJack 8 3 SOURCESelectSwitch 8 4 LEVELControl 8 5 PowerSwitch 8 RearPanel 9 6 IECPowerReceptacle 9 7 LEFTandRIGHTPHONESINPUT 9 8 PHONESOUTPUT 9 9 LEFTandRIGHTMAININPUT 9 10 MAINPHONESINPUT 9 AppendixA ServiceInformation 10 WarrantyService 10 Troubleshooting 10 Repair 11 AppendixB Connections 12 Appen...

Page 4: ...ight away Right after that are the ever popular hook up diagrams that show typical setups for live sound and recording Then when you have time read the Features Description section This describes every knob button and connection point on the HM 54 Throughout this section you ll find illustrations with each feature numbered If you want to know more about a feature simply locate it on the appropriate...

Page 5: ...s for headphone amp 1 and S L O W L Y turn up the LEVEL control on the front panel for the corresponding headphone amp Adjust for a comfortable listening level Note If the volume gets really loud really fast turn down the MAIN INPUT LEVEL control until you can turn up the headphone amp LEVEL control at least halfway Conversely if you have to turn the headphone amp LEVEL control all the way up turn...

Page 6: ...studio preamp in a recording application The microphones and instruments are connected to the 400F and tracked to the DAW via the FireWire connection Separate stereo headphone mixes are returned from the DAW over the FireWire connection using the DAW s stereo auxes and connected to the Phones Inputs on the HM 54 via the eight analog outputs on the 400F ...

Page 7: ...o headphone mixes to the HM 54 The Phones output from the 1640 is connected to the Main Phones Input on the HM 54 allowing the talent to listen to either the same mix as the engineer in the control room i e stereo return from the DAW for overdubbing or to their own individual headphone mix tracking If the talent and engineer are in the same room each musician can adjust their own headphone mix on ...

Page 8: ...l from the rear panel PHONES jack WARNING The headphone amps are designed to drive any standard headphones to a very loud level We re not kidding They can cause permanent hearing damage Even intermediate levels may be painfully loud with some headphones BE CAREFUL Always start with the PHONES level turned all the way down before connecting headphones to the PHONES jack Keep it down until you ve pu...

Page 9: ...hard wiring the headphone outputs to a patch panel in the rack Note Plugging headphones into the front panel PHONES jack automatically disconnects the signal from the rear panel PHONES jack 9 LEFTandRIGHTMAININPUT These 1 4 TRS jacks accept a balanced or unbalanced line level input signal This is the signal that you select when you leave the SOURCE select switch 3 on the front panel in the out pos...

Page 10: ...nel Is the input LEVEL control 4 for the channel turned up Is the signal source turned up Make sure the signal level from the selected input source is high enough to drive the line level inputs on the HM 54 Try the same source signal in another channel set up exactly like the suspect channel Bad Output If you are listening to a PHONES OUTPUT 8 on the rear panel make sure that nothing is plugged in...

Page 11: ...ory packaging 5 Include a legible note stating your name shipping address no P O boxes daytime phone number Service Request Number and a detailed description of the problem including how we can duplicate it 6 Write the Service Request Number in BIG PRINT on top of the box Units sent to us without the Service Request Number will be refused 7 Tech Support will tell you where to ship the preamplifier ...

Page 12: ... ground earth connection from the balanced input ground earth connection leaving the unbalanced ground connected to the balanced input low cold connection only In some cases you may have to make up special adapters to interconnect your equipment For example you may need a balanced XLR female connected to an unbalanced 1 4 TS phone plug Many common adapters can be found at your local electronics su...

Page 13: ...hnical Info HM 54 Specifications Frequency Response Main Input to any Output Level 12 o clock 0 1 dB 20 Hz to 20 kHz Distortion THD IMD Main Input to any Output 4 dBu output THD N 0 01 20 Hz to 20 kHz BW 1 kHz input 4 dBu Level 12 o clock Noise Residual Output Noise 103 dBu all outputs off 600Ω load 97 dBu all outputs 12 o clock 600Ω load Input Sensitivity 0 dBu 1 5 mW 600Ω Level 12 o clock Input G...

Page 14: ...CT MAIN Main Input Level Phones 1 Front Phones Level Phones 1 Rear Left Right Phones 2 Input DIRECT MAIN Phones 2 Front Phones Level Phones 2 Rear Left Right Phones 3 Input DIRECT MAIN Phones 3 Front Phones Level Phones 3 Rear Left Right Phones 4 Input DIRECT MAIN Phones 4 Front Phones Level Phones 4 Rear ...

Page 15: ... of the LOUD Technologies factory authorized service centers and deemed eligible for repair or replacement under the terms of this warranty will be repaired or replaced within thirty days of receipt LOUD Technologies and its authorized service centers may use refurbished parts for repair or replacement of any product Products returned to LOUD Technologies that do not meet the terms of this Warrant...

Page 16: ... Road NE Woodinville WA 98072 USA United States and Canada 800 898 3211 Europe Asia Central and South America 425 487 4333 Middle East and Africa 31 20 654 4000 Fax 425 487 4337 www mackie com E mail sales mackie com ...

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