HH electronics M Series Professional Power Amplifier User Manual

: June 4, 2024
: HH Electronics

Table of Contents

SAFETY WARNINGS
GENERAL INSTRUCTIONS
INTRODUCTION
FRONT PANEL CONTROLS AND FEATURES
REAR PANEL CONTROLS AND FEATURES
INPUTS AND OUTPUTS
SPECIFICATIONS
References
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HH electronics M Series Professional Power Amplifier User Manual

SAFETY WARNINGS

Intended to alert the user to the presence of uninsulated ‘Dangerous Voltage’ within the products enclosure that may be sufficient to constitute a risk of electrical shock to persons.

Intended to alert the user of the presence of important operating and maintenance (Servicing) instructions in the literature accompanying the product.

CAUTION
Risk of electrical shock – DO NOT OPEN.
To reduce the risk of electrical shock, do not remove the cover. No user serviceable parts inside. Refer servicing to qualified personnel.

SAFETY WARNINGS

After unpacking your amplifier check that it is factory fitted with a three pin ‘grounded’ (or earthed) plug. Before plugging into the power supply ensure you are connecting to a grounded earth outlet.
If you should wish to change the factory fitted plug yourself, ensure that the wiring convention applicable to the country where the amplifier is to be used is strictly conformed to. As an example in the United Kingdom the cable colour code for connections are shown opposite.

GENERAL INSTRUCTIONS

In order to take full advantage of your new product and enjoy long and trouble-free performance, please read this owner’s manual carefully, and keep it in a safe place for future reference.

Unpacking: On unpacking your product please check carefully for any signs of damage that may have occurred whilst in transit from the HH factory to your dealer. In the unlikely event that there has been damage, please re-pack your unit in its original carton and consult your dealer. We strongly advise you to keep your original transit carton, since in the unlikely event that your unit should develop a fault, you will be able to return it to you dealer for rectification securely packed.
Amplifier Connection: In order to avoid damage, it is advisable to establish and follow a pattern for turning on and off your system. With all system parts connected, turn on source equipment, tape decks, cd players, mixers, effects processors etc, BEFORE turning on your amplifier. Many products have large transient surges at turn on and off which can cause damage to your speakers.
By turning on your bass amplifier LAST and making sure its level control is set to a minimum, any transients from other equipment should not reach your loud speakers.Wait till all system parts have stabilised, usually a couple of seconds. Similarly when turning off your system always turn down the level controls on your bass amplifier and then turn off its power before turning off other equipment.
Cables: Never use shielded or microphone cable for any speaker connections as this will not be substantial enough to handle the amplifier load and could cause damage to your complete system.
Servicing: The user should not attempt to service these products. Refer all servicing to qualified service personnel.

FCC COMPLIANCY STATEMENT

This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions:

This device may not cause harmful interference
This device must accept any interference received, that may cause undesired operation.

Warning: Changes or modification to the equipment not approved by HH Electronics Ltd. can void the user’s authority to use the equipment.
Note:This equipment has been tested and found to comply with the limits for Class B digital device, pursuant to Part 15 of the FCC Rules.These limits are designed to provide reasonable protection against harmful interference in a residential installation.This equipment generates, uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try and correct the interference by one or more of the following measures.

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

This product conforms to the requirements of the following European Regulations, Directives & Rules:
CE Mark (93/68/EEC), Low Voltage (2014/35/EU), EMC (2014/30/EU), RoHS (2011/65/EU), ErP (2009/125/EU).

In order to reduce environmental damage, at the end of its useful life, this product must not be disposed of along with normal household waste to landfill sites. It must be taken to an approved recycling centre according to the recommendations of the WEEE (Waste Electrical and Electronic Equipment) directive applicable in your country.

http://support.hhelectronics.com/approvals

Read these instructions.
Keep these instructions safe.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including amplifiers) that produce heat.
An apparatus with Class I construction shall be connected to a mains socket outlet with a protective connection. 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 third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point they exit from the apparatus.
Only use attachments/accessories provided by the manufacturer.
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.
The mains plug or appliance coupler is used as the disconnect device and shall remain readily operable. The user should allow easy access to any mains plug, mains coupler and mains switch used in conjunction with this unit thus making it readily operable. Unplug this apparatus during lightning storms or when unused for long periods of time.
Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way,such as when 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.
Never break off the ground pin. Connect only to a power supply of the type marked on the unit adjacent to the power supply cord.
If this product is to be mounted in an equipment rack, rear support should be provided.
Note for UK only: If the colours of the wires in the mains lead of this unit do not correspond with the terminals in your plug‚ proceed as follows:
a) The wire that is coloured green and yellow must be connected to the terminal that is marked by the letter E‚ the earth symbol‚ coloured green or coloured green and yellow.
b) The wire that is coloured blue must be connected to the terminal that is marked with the letter N or the colour black.
c) The wire that is coloured brown must be connected to the terminal that is marked with the letter L or the colour red.
This electrical apparatus should not be exposed to dripping or splashing and care should be taken not to place objects containing liquids, such as vases, upon the apparatus.
Exposure to extremely high noise levels may cause a 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 sufficient time.
The U.S. Government’s Occupational Safety and HealthAdministration (OSHA) has specified the following permissible noise level exposures: According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. Earplugs or protectors to the ear canals or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss, if exposure is in excess of the limits as set forth above.To ensure against potentially dangerous exposure to high sound pressure levels, it is recommended that all persons exposed to equipment capable of producing high sound pressure levels such as this amplification system be protected by hearing protectors while this unit is in operation.
Symbols & nomenclature used on the product and in the product manuals, intended to alert the operator to areas where extra caution may be necessary, are as follows:
Intended to alert the user to the presence of high ‘Dangerous Voltage’ within the products enclosure that may be sufficient to constitute a risk of electrical shock to persons.
Intended to alert the user of the presence of important operating and maintenance (Servicing) instructions in the literature accompanying the product.

Risk of electrical shock – DO NOT OPEN.To reduce the risk of electrical shock, do not remove the cover. No user serviceable parts inside. Refer servicing to qualified personnel.
To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this appliance please read the operating instructions.

INTRODUCTION

HH M-Series power amplifiers are high power, 2U rack amplifiers designed to provide maximum performance for demanding applications.Three models are available all featuring heavy duty linear toroidal power supply units and rugged construction. Suitable for bars, pubs, clubs, houses of worship, musicians, or indeed anywhere you need high power amplification. HH has over five decades of experience designing quality power amplifiers, and indeed was one of the pioneers in this area.

Key Features:

Two Channel Audio Power Amplifier.
High Quality Heavy Duty,Toroidal Power supply.
Heavy Gauge 2U chassis.
Ultra-reliable linear power stage.
Comprehensive Protection System.

FRONT PANEL CONTROLS AND FEATURES

M2600D front panel shown, but all modes in the range have the same controls and layout.

FRONT PANEL CONTROLS AND FEATURES

RACK MOUNT FIXING HOLES: Allows for installation into a standard 19″ rack case.
POWER SWITCH: Turn off amplifier when not in use.
VENTILATION HOLES: To keep your amplifier cool, air passes through the front panel punching, through a filter and finally exiting to the rear of the unit.
It is vital that the flow of air IS NOT restricted in any way.
If the amplifier is rack mounted, there MUST be a free un-restricted flow of air to prevent potential overheating. There should be a clearance of at least 20cm between the rear face of the amplifier and any other structures and a means of the exhaust air to escape.
LEVEL CONTROL AND INDICATORS: All amplifiers in the M-Range have dedicated Level control and Signal Level monitors for each channel. The meter provides the following information:
Indicates the onboard protection circuit is active, thus preventing damage to the amplifier.
The onboard compressor / limiter is active and prevents overload or signal distortion.
Shows signal is present.
Indicates the amplifier is powered up and ready for use.

LEVEL CONTROL: This provides continuous adjustment from -80dB to 0dB. Set to 0dB for normal operation.
The function of the Level Control is determined by the amplifier mode set via the rear panel Mode Switch.

REAR PANEL CONTROLS AND FEATURES

The M2600D rear panel is shown, but all modes in the range have the same controls and layout.

REAR PANEL CONTROLS AND FEATURES

IEC POWER INLET: Before the initial power up, ensure the SupplyVoltage Rating (located above the power socket) is compliant with your local mains supply.
Disconnect the power connector when the amplifier is not in use!
The unit must be earthed under all circumstances!
RESET: A protection device for the amplifier output stage. It is activated if the amplifier is driven into a short circuit or any prolonged over-current situation,such as driving into impedances too low, at too high power for too long.
Normal operation will resume once the fault has been removed and the Reset button pressed.
SAFETY INFORMATION.
OUTPUT SECTION: Two SpeakON output connectors and 4mm binding post terminals corresponding to the two channels of the amplifier. Connect loudspeakers to either the SpeakON Outputs or theTerminal Posts.
The 4mm binding posts are located behind a safety cover. To access, first remove the screw securing the plastic cover.
Please DO NOT use instrument or microphone cables to connect your amplifier and speaker cabinet!
The amplifier will drive a minimum speaker impedance of 4Ω in Stereo or Parallel mode and 8Ω in Bridge mode.
COOLING FANS: Two variable speed fans to cool the unit. DO NOT OBSTRUCT!
INPUT SECTION: Two XLR Input connectors accepting single ended and balanced inputs – Pin 2 hot. Balanced signals are recommended for improved signal to noise ratio.

LINK OUTPUTS: Internally routed from the Input XLR’s, the Link Outputs (Pin 2 hot) can be used to daisy-chain an additional device.

SENSITIVITY CONTROL: Two options available: 0.775V and 1.4V. The setting used will depend on the level of the source device.

MODE SWITCH: Provides three operating modes:

STEREO:
Channel 1 Input Channel 1 output – level adjustment via Channel 1 Gain control
Channel 2 Input Channel 2 output – level adjustment via Channel 2 Gain control.

PARALLEL:
Channel 1 Input Channel 1 output – level adjustment via Channel 1 Gain control
Channel 1 Input Channel 2 output – level adjustment via Channel 2 Gain control.

BRIDGE:
Channel 1 Input Channel 1 output – level adjustment via Channel 1 Gain control.
Channel 2 Input, Gain Control and output is disabled.

Please see the wiring diagrams on the following page.

(SpeakON is a registered trademark of NeutrikAG.
All other trademarks are the property of their respective owners)

INPUTS AND OUTPUTS

In all instances, uses either the SpeakON outputs or the binding post terminals – not both types at the same time.

STEREO MODE
PARALLEL MODE

SPECIFICATIONS

Model	M-750D	M-1500D	M-2600D
Output Power RMS : 8 Ohm Stereo	2x500W	2x1250W	2x1500W
Output Power RMS : 4 Ohm Stereo	2x750W	2x1500W	2x2600W
Output Power Bridge RMS : 8 Ohm Stereo	1500W	2900W	5150W
Frequency response1	20Hz – 20KHz (+0, -1dB)
THD%	≤0.5% 20Hz-20kHz
IMD2	=/<0.35%
S/N	≥100dB
Damping Factor	>200 (8 ohms, 10Hz-400Hz)
Slew Rate	≥20V/µS
Crosstalk (1kHz/20kHz)	-75dB/-58dB
Input Sensitivity	0.775V/1.4V
Input Impedance (Bal/Unbal)	20KΩ/10KΩ
Voltage Gain (8Ω)	36dB	37dB	37dB
Cooling	Variable Speed Fan, Air flow from front to rear
Protection	Soft start, VHF, RF, short circuit, over load, clip limit, over

heat
PSU Type| Toroidal, fixed voltage
Amplifier Type| High Performance Professional linear design
Rear Panel|
Input Connector| Balanced XLR-F
Output Connector| NL4 Speakon per channel, 4mm Binding posts with safety cover, Balanced XLR-M link out
Power Connector| 10A Removeable IEC Power Cord C14

(3×1.5mm2)

FOR ADDITIONAL DATA, PLEASE CHECK WWW.HHELECTRONICS.COM