Concerto Grosso - Speaker HECO - Free user manual and instructions

USER MANUAL Concerto Grosso HECO

At the end of the product's useful life, please dispose of it at appropriate collection points provided in your country.

We congratulate you on acquiring this exclusive HECO product.

Acquiring this loudspeaker will enable you to fulfil your wildest dreams for listening to natural, unadulterated sound.

Please study the instructions and information below carefully before using your new loudspeakers.

SET-UP INFORMATION

CONCERTO GROSSO should if possible be set up without obstruction and slightly inclined towards the place of listening (fig. 1).

In the ideal configuration the speakers and the listening position should form an equilateral triangle. When the left and right speakers are the same distance from the listening position their sound arrives at the same time, resulting in a harmonious, natural music reproduction.

There should be a clear line of sight between the loudspeakers and the listening position. Any sound-absorbing or reflecting obstacles in the path will distort the sound.

The side-mounted bass speaker is located on the left-hand side of one speaker and on the right-hand side of the other. Due to the identical appearance of the speakers and the opposite-mounted passive radiator, this can only be identified through the designation “L” and “R” on the connecting terminal. When set up correctly, the bass speakers should both face inwards, as this produces an optimum sound in the majority of cases. If the bass response is adversely affected as a result of poor room acoustics, however, we recommend you try swapping the speakers around so that the bass speakers face outwards.

SPIKES

You should use the supplied spikes. The spikes are height-adjustable and possess a counter nut. Any irregularities in the floor may be offset and a firm stand may be achieved with the spikes. They also decouple the loudspeakers from the base so that any undesirable resonance is avoided.

The spikes must be screwed into the threaded sleeves at the bottom of the box when the hard rubber feet have been removed.

In order to prevent the floor from being damaged, you should get help from someone to tilt the box slightly when fitting the spikes.

First, screw in two spikes next to each other and – before setting the box down – put the corresponding washers (rubber facing down) in place. Then attach the two opposite spikes and lower accordingly.

Then align the box vertically and counter the spikes.

BI-WIRING AND BI-AMPING, TRI-WIRING AND TRI-AMPING

CONCERTO GROSSO possesses a field with eight screw terminals, which – besides conventional connection to an amplifier – also permit bi-wiring/bi-amping and tri-wiring/tri-amping.

The (-) terminals are on the left.

The upper terminals are connected to the treble section, the central terminals are connected to the mid-section of the crossover, and the lower terminals are connected to the bass section, which includes both the bass-midrange driver at the front and the side woofer. The additional terminal at the top right allows the treble range to be elevated by 2dB, the other terminal in the centre right allows the mid-range to be lowered by 2dB.

The appropriate setting depends on the listening space, on where the loudspeakers are placed and naturally on personal taste.

In rooms with high absorption (e.g. heavily upholstered furniture and curtains), the +2dB tweeter setting is recommended and where the speakers are set up in close proximity to a wall at their backs and rooms with low absorption, the -2dB setting is recommended.

Bi-wiring means that high and low frequencies are transported through separate cables. The bi-amping method also requires a second final amplifier in addition to the second cable.

Tri-wiring requires a third cable, tri-amping requires an additional third amplifier.

Four cable bridges have been supplied.

Please connect the loudspeaker terminals for conventional use with the y-cable bridges (one cable shoe and two plugs) in accordance with Fig. 2 a – d.

Please use the other cable bridges (one cable shoe and one plug) as shown in Fig. 2 e-1 for bi-wiring and bi-amping.

No bridges may be used for tri-wiring and tri-amping. Figs. 2 m – t show the connections to the amplifier(s).

CONNECTING YOUR HECO CONCERTO GROSSO LOUDSPEAKERS

Warning: Only hi-fi amplifier loudspeaker outputs may be connected to the loudspeaker terminal.

Please always use a good quality loudspeaker connection cable from an audio dealer. To prevent impairment of sound quality, we recommend cables with cross-sections of at least 2.5 mm^2 for lengths up to 3 m and at least 4 mm^2 for lengths above 3 m.

Always turn off the amplifier or receiver before connecting or disconnecting loudspeaker cables.

Place the loudspeakers in their planned positions and cut the cables to the right length. The cables for both channels should always be exactly the same length.

For good sound it is imperative that the cables must be connected in such a way that the speakers are “in phase”. This means that the black negative terminals on the speakers (-) must be connected to the negative (-) terminals on the amplifier, the red positive (+) speaker terminals to the positive (+) amplifier terminals. To make this easier one wire of most speaker cables is marked with a coloured strip or a ridge in the insulation.

The terminal is designed for 3 cord sets:

• Connection via banana plugs (fig. 3a)
• Connection via clevis type fittings (fig. 3b)
  • Non-ready-made (fig. 3c)

Strip 10 – 15 mm of insulation from the ends of non-ready-made cables. Twist the ends – this is much better than tinning them with solder – insert them in the terminals and tighten the terminal screws firmly.

Before switching on the system double-check all your connections and make sure that the terminal screws are tight and that there are no short circuits caused by stray wire filaments – this could cause serious damage to your amplifier!

MAINTENANCE

The lacquered surface is best cleaned with a mild household cleaner. On no account use furniture polish or similar products on these surfaces.

HOW TO AVOID DAMAGE TO YOUR VALUABLE SPEAKERS

All HECO loudspeakers are designed and built for optimum sound reproduction with the tone controls in the central position – i.e. with “linear” amplifier output. Turning up the bass and treble controls too far delivers more power to the woofers and/or tweeters, and at high volumes this can actually destroy the speaker units!

If the output of your amplifier is significantly higher than the rated power handling capacity of your speakers extremely high volumes can physically destroy your speakers. This doesn't actually happen often but you should be aware that it is possible.

Weak amplifiers with low output ratings can actually be more dangerous for your speakers at medium volumes because weak amplifiers may overload much faster than powerful ones and this causes measurable and audible distortion, which is extremely dangerous to your loudspeakers.

Always turn the volume down immediately as soon as you hear distortion! If you like listening to loud music make sure that your amplifier can deliver at least as much power as the speakers' power-handling rating.

Amplifiers, tuners and CD players can all produce inaudible high-frequency signals – and this doesn't only apply to cheap products. If your tweeters fail at low or medium volumes you should have a qualified technician check your system components for dangerous inaudible signals.

SPECIFICATIONS

Configuration: 4-way bass reflex

Power-handling capacity: 325 / 550 W

Impedance: 4 – 8 ohms

Frequency response: 16 – 52 000 Hz

Recommended amplifier output: 30 - 550 W

Efficiency (1W/1m): 92 dB

Dimensions (WxHxD): 324 x 1352 (excl. spikes) x 617 mm

Weight: 63.1 kg

Accessory: 4 adjustable spikes

Subject to technical change.

Très cher client,

Diagram of a person holding hands in front of a large rectangular frame with two hanging square boxes above (no text or symbols)

2a

2a Normal linear HIGH LINEAR +2dB MID LINEAR -2dB HECO LOV Amplifier -

2b

Normal High+2dB HECO - Amplifier + - HIGH +2dB MID -2dB LOW

2c

C Normal Mid-2dB HIGH LINEAR +2dB MID LINEAR -2dB HECO LOW Amplifier

2d

2d Normal High+2db Mid-2db HECO Amplifier - + - HIGH LINEAR +2db MID LINEAR -2db LOW

2e

e Bi-Wiring linear HIGH +2dB MID +2dB HECO LOV Amplifier -

2f

f BI-Wiring High+2dB HIGH LINEAR +2dB MID LINEAR -2dB HECO LOW Amplifier -

2g

g Bi-Wiring Mid-2dB HIGH +2dB MID -2dB HECO LOV Amplifier -

2h

Bi-Wiring High+2dB Mid-2dB IIECO Amplifier - + - HIGH LINEAR +2dB MID LINEAR -2dB LOW

2i

Amplifier1 + Amplifier2 + Bi-Amping linear HIGH LINEAR +2dB MID LINEAR -2dB HECO LOW

2j

Amplifier1 + Amplifier2 + Bi-Amping High+2dB HIGH LINEAR +2dB MID LINEAR -2dB HECO LOW

2k

2k Amplifier1 + Amplifier2 + Bi-Amping Mid-2dB HIGH LINEAR +2dB MID LINEAR -2dB ILECO LOW

21

Amplifier1 + Amplifier2 + Bi-Amping High+2dB Mid-2dB HIGH LINEAR +2dB MID LINEAR -2dB HECO LOW

3a	-YXGW]
3b
3c

D

Congratulations! You have made a wise selection in becoming the owner of a HECO HiFi equipment. Due to high quality HECO HiFi products have earned an excellent reputation through the western world. And this high quality standard enables

us to grant a 5-years warranty for HECO HiFi speakers and a 2-years warranty for HECO HiFi-electronic components.

The equipments are checked and tested continuously during the entire production process. In case you have problems with your HECO HiFi equipment, kindly observe the following:

1. The guarantee period commences with the purchase of the component and is applicable only to the original owner.
2. During the guarantee period we will rectify any defects due to faulty material or workmanship by replacing or repairing the defective part at our discretion. Further claims, and in particular those for price reduction, cancellation of sale, compensation for damages or subsequential damages, are excluded. The guarantee period is not altered by the fact that we have carried out guarantee work.
3. Unauthorized tampering with the equipment will invalidate this guarantee.
4. Consult your authorized dealer first, if guarantee service is needed. Should it prove necessary to return the component to the factory, please insure that • the component is packed in original factory packing in good condition • the quality control card has been filled out and enclosed with the component • your enclose your receipt as proof of purchase.
5. Excluded from the guarantee are: • Illuminates • Wear parts • Shipping damages, either readily apparent or concealed (claims for such damages must be lodged immediately with forwarding agent, the railway express office or post office). • Scratches in cases, metal components, front panels, etc. (You must notify your dealer directly of such defects within three days of purchase.) • Defects caused by incorrect installation or connection, by operation errors (see operating instructions), by overloading or by external force.
6. Equipments which have been repaired incorrectly or modified or where the case has been opened by persons other than us. • Consequential damages to other equipments. • Reimbursement of cools, without our prior consent, when repairing damages by third parties.

F

Toutes nos félicitations!

Name and address of the dealer/stamp

Käufer/Customer

Name/Name

Straße/Street

PLZ, Ort/City

Land/Country

Kaufdatum/buying date

No warranty without receipt!

Lise-Meitner-Str. 9 • D-50259 Pulheim • Germany

Tel. [phone] / 807 - 0 • Fax [phone] / 807 - 399

www.heco-audio.de