Quantum 757 - Loudspeaker MAGNAT - Free user manual and instructions

Product type	Bookshelf / floorstanding speaker
Brand	Magnat
Model	Quantum 757
Category	Speaker
Speaker type	3-way floorstanding
Number of ways	3
Rated power (RMS)	200 W
Peak power	380 W
Impedance	4-8 Ω
Frequency response	28 - 40000 Hz
Sensitivity	89 dB (2.83 V/1 m)
Woofer diameter	200 mm
Midrange diameter	170 mm
Tweeter diameter	25 mm
Dimensions (H x W x D)	1100 x 240 x 370 mm
Weight	26 kg
Sound enhancements	Bass reflex, removable grille
Installation tips	Place at least 30 cm from the rear wall
Care and cleaning	Clean with a soft, dry cloth
Safety	Do not expose to moisture or direct sunlight
Spare parts and repairability	Contact Magnat customer service

Frequently Asked Questions - Quantum 757 MAGNAT

How do I connect my Magnat Quantum 757 speaker?

Use a speaker cable of sufficient cross-section (2.5 mm² minimum). Connect the red wire to the positive (+) terminal and the black wire to the negative (-) terminal of the amplifier and speaker. Observe polarity for correct sound reproduction.

What is the recommended amplifier power?

The recommended power is between 30 and 200 watts RMS per channel. An amplifier that is too powerful can damage the speakers.

Can I use these speakers for a home theater system?

Yes, the Quantum 757 can be used as front speakers in a home theater system. Combine them with a center speaker and surrounds for optimal surround sound.

How do I clean the speaker grilles?

Carefully remove the grille. Clean it with a slightly damp soft cloth. Avoid chemical products. Let it dry before replacing.

Is there a burn-in period for new speakers?

Yes, a burn-in period of about 30 to 50 hours at moderate volume allows the suspensions to loosen and achieve optimal performance.

Can I bi-wire or bi-amp the Quantum 757?

The terminals are designed for bi-wiring. Remove the metal bridges between the HF and LF terminals, then connect two separate cables from the amplifier or use two amplifiers.

What is the speaker impedance?

The nominal impedance is 4 to 8 ohms. Check compatibility with your amplifier.

How to optimize speaker placement?

Place the speakers at least 30 cm from the rear wall and 2-3 meters apart. Angle them slightly towards the listening position (toe-in) to improve the soundstage.

Are the speakers magnetically shielded?

No, the Quantum 757 are not magnetically shielded. Avoid placing them near a cathode ray tube television or sensitive magnetic media.

What to do in case of distorted sound or crackling?

Check cable connections, ensure no debris on the speakers, and reduce the volume. If the problem persists, contact Magnat after-sales service.

USER MANUAL Quantum 757 MAGNAT

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

Dear MAGNAT Customer,

Congratulations on your fine new loudspeakers and thank you very much for choosing MAGNAT! You have made an excellent choice. The high-quality speakers produced by MAGNAT are renowned all over the world.

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

GENERAL INFORMATION ABOUT CONNECTING YOUR MAGNAT QUANTUM LOUDSPEAKERS

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.

Strip 10 – 15 mm of insulation from the ends of the cables. Twist the ends – this is much better than tinning them with solder – insert them in the terminals and tighten the terminal screws firmly. (Fig. 1)

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.

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!

THE MAGNAT QUANTUM LOUDSPEAKERS IN STEREO MODE

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. (Fig. 2)

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. When you install the loudspeakers the following distances should be maintained:

QUANTUM floorstanders: at least 20 cm away from the rear wall and at least 30 cm from the side walls. This will prevent excessive emphasis of the bass range.

QUANTUM bookshelf speakers: shelf loudspeakers should also be as free-standing as possible, the distance to the sides and rear to walls and items should be at least 10 cm, the tweeters should be located at ear height.

Spikes (QUANTUM floorstanders): you should use the supplied spikes when setting the speakers up. This isolates them from the supporting surface, preventing unpleasant resonance effects.

MAGNAT QUANTUM LOUDSPEAKERS AS A FRONT OR REAR LOUDSPEAKER

The front loudspeakers are positioned at ear height on the left and right as equidistant from the television as possible. The rear loudspeakers are placed at ear height or a little above on the left and right besides or better behind the listening position. (Fig. 3)

BI-WIRING AND BI-AMPING

Bi-wiring means using separate cables to carry the high and low audio frequencies. Bi-amping takes this idea one step further and uses separate power amplifiers as well as separate cables for high and low frequencies. Bi-amping in particular produces an additional improvement in sound reproduction quality.

The special connection terminals of the QUANTUM loudspeakers support both conventional connection and operation in bi-wiring and bi-amping modes. There are four screw terminals on each speaker. The top pair are for the tweeter (high frequencies), the lower pair for the woofer (low frequencies). The factory-installed metal strips connecting the positive and negative terminals are for conventional 2-wire connection and must be removed for bi-wiring and bi-amping operation. The pictures below show the correct set-up for conventional operation (Fig. 4a), bi-wiring (Fig. 4b) and bi-amping (Fig. 4c).

MAGNAT QUANTUM CENTER 73

The QUANTUM CENTER 73 loudspeaker visually and acoustically ideally matches the other QUANTUM models. The loudspeaker is placed immediately on or under the television set. Otherwise please adhere to the general recommendations outlined in the previous chapters.

MAGNAT QUANTUM 731A

The QUANTUM 731A active subwoofer visually and acoustically ideally matches the other loudspeakers in the Vica series. Please refer to the separate operating instructions supplied with this product.

CONNECTING TO AN AV RECEIVER

Figs. 5 and 6 show two different methods of connecting to AV receivers.

Fig. 5: AV receiver without subwoofer output.

Fig. 6: AV receiver with subwoofer output.

HOW TO AVOID DAMAGE TO YOUR VALUABLE SPEAKERS

All MAGNAT 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.

MAINTENANCE

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

SPECIFICATIONS

QUANTUM 757 QUANTUM 755

Configuration: 3-way bass reflex 2 1/2-way bass reflex

Power-handling capacity: 220 / 350 W 190 / 300 W

Impedance: 4 – 8 ohms 4 – 8 ohms

Frequency response: 20 – 50 000 Hz 22 – 50 000 Hz

Recommended amplifier output: >30 W >30 W

Efficiency (1W/1m): 93 dB 93 dB

Dimensions (WxHxD): 190 x 1062 x 370 mm 190 x 992 x 370 mm

Accessory:

Metal spikes

Metal spikes

QUANTUM 753 QUANTUM CENTER 73

Configuration: 2-way bass reflex 2-way bass reflex

Power-handling capacity: 120 / 180 W 120 / 180 W

Impedance: 4 – 8 ohms 4 – 8 ohms

Frequency response: 30 – 50 000 Hz

30 - 50 000 Hz

Recommended amplifier output: >20 W

20 W

Efficiency (1W/1m): 91 dB 91 dB

Dimensions (WxHxD): 190 x 362 x 335 mm

470 x 170 x 295 mm

Subject to technical change.

Très cher client,

BI-WRING Y BI-AMPING

QUANTUM HÖGTALARE I STEREODRIFT

BI-WIRING OCH BI-AMPING

Diagram showing two objects above a rectangular screen with dashed lines indicating alignment or perspective (no text or symbols)

3

4a
4b
4c

graph TD
    A["FRONT L"] --> B["SEAKER OUT"]
    C["CENTER"] --> B
    D["FRONT R"] --> B
    E["REAR L"] --> F["REAR R"]
    G["SUBWOOFER"] --> H["SUBWDER"]
    I["REAR L"] --> J["REAR R"]
    K["FOOD"] --> L["FOOD"]
    M["FOOD"] --> N["FOOD"]
    O["FOOD"] --> P["FOOD"]
    Q["FOOD"] --> R["FOOD"]
    S["FOOD"] --> T["FOOD"]
    U["FOOD"] --> V["FOOD"]
    W["FOOD"] --> X["FOOD"]
    Y["FOOD"] --> Z["FOOD"]
    AA["FOOD"] --> AB["FOOD"]
    AC["FOOD"] --> AD["FOOD"]
    AE["FOOD"] --> AF["FOOD"]

graph TD
    A["FRONT L"] --> B["SEAKER OUT"]
    C["CENTER"] --> D["RECEIVER"]
    E["FRONT R"] --> F["SUBWODFER"]
    G["REAR L"] --> H["REAR R"]
    I["SUBWODFER"] --> J["REAR R"]
    K["REAR R"] --> L["REAR L"]
    M["FRONT L"] --> N["SEAKER OUT"]
    O["FRONT R"] --> P["RECEIVER"]
    Q["REAR L"] --> R["REAR R"]
    S["REAR R"] --> T["REAR L"]
    U["SUBWODFER"] --> V["REAR R"]
    W["REAR L"] --> X["REAR R"]
    Y["REAR L"] --> Z["REAR R"]
    AA["REAR L"] --> AB["REAR R"]
    AC["REAR L"] --> AD["REAR R"]
    AE["REAR L"] --> AF["REAR R"]

D

Congratulations! You have made a wise selection in becoming the owner of a MAGNAT HiFi equipment. Due to high quality MAGNAT 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 MAGNAT HiFi products.

The equipments are checked and tested continuously during the entire production process. In case you have problems with your MAGNAT 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. • 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

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Käufer/Customer

Name/Name

Straße/Street

PLZ, Ort/City

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No warranty without receipt!

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