Gamut M250i Kullanıcı Kılavuzu - Sayfa 6

Amplifikatör Gamut M250i için çevrimiçi göz atın veya pdf Kullanıcı Kılavuzu indirin. Gamut M250i 13 sayfaları. Mono power amplifer

Connecting your loudspeakers

Normal power ampli ers have a coil in parallel with a resistor between the ampli er and the

output connector. Its purpose is to protect the ampli er against capacitive speaker and cable loads.

However, this will slightly reduce the delity of the sound in the treble range, when the ampli er

is used with normal loudspeakers. So we have added a direct output in addition to the normal lter

protected output.

The red terminal closest to the heat sinks is the direct output. The other red terminal is the lter

output.

The white terminals are ground.

Biwiring: This also gives you the ability to connect biwiring nicely, using the lter output for the

bass and the direct output for the treble. However, you will achieve the best possible sound and

the most correct tonal balance when biwiring both bass and treble from the same pair of output

terminals, choosing either direct or normal.

NB: When biwiring an electrostatic loudspeaker, please connect both cables to the normal

( lter) output.

Inside the cabinet the ground terminals are kept biwired until they meet at the main star ground

point.

So please do not connect them together.

The red terminals go positive when there is a positive signal on the Pin 2 on the input XLR.

In other words, GamuT ampli ers are non-inverting. Some other brands of ampli ers do not follow

this standard. Keep this in mind if you want to bi-amp, with another ampli er from another brand.

Most loudspeaker are 8 or 4 Ohm, and they are speci ed so by the manufacturer.

Unfortunately, some loudspeakers have an impedance, which is much lower than speci ed.

They will not damage the GamuT power ampli er, because it will simply mute.

In the GamuT M250i, we use a gem of a MOSFET transistor. It handles 500 Watts, and a peak

current of 400 Ampere and 100 Ampere long-term.

Such high currents will destroy any HiFi loudspeaker we know of.

The lower the impedance, the higher the current will be.

Somewhere, we have to draw a line between what is a loudspeaker load, and what is a short circuit.

We have set this line at 1.5 Ohm, which will draw about 47 Ampere peak.

The impedance of a few electrostatic loudspeakers does go down below 1.5 Ohm at high

frequencies. The protection circuit will not allow this longterm on test signals. However, it works

well with Quad ELS-63 and most Martin Logan electrostatic loudspeakers.

Please also note that a Quad ELS-63 electrostatic loudspeaker cannot handle more than 55V peak,

and the GamuT can give more than 70V peak. So be careful.