Gamut D200i User Manual - Page 9

Browse online or download pdf User Manual for Amplifier Gamut D200i. Gamut D200i 12 pages. Dual-mono power amplifiers

Print Page

A few useful speci cations:

Shipping weight is 31 kg.

Dimensions are 164 mm high, 431 mm wide, and 470 mm deep.

Idle power consumption is 100 Watts.

The slow blow mains fuse limits power consumption at 1,150 Watts long-term.

Output power in 8 Ohms resistive load is 200 Watts or 23dbW.

Speaker loads below 1.5 Ohms are not allowed by the protection circuit

Noise is at least 100 dB below 200 Watts in 8 Ohms. This depends on the gain selected, and it is below

the noise from a CD.

Strong external electromagnetic elds can increase the noise level. Use only shielded signal cables.

The balanced XLR input has a 40 kOhm input impedance. The 3-pin XLR socket has Pin 2 as plus,

Pin 3 as minus, and Pin 1 as ground. The RCA unbalanced input has a 20 kOhm input impedance.

Sensitivity can be selected internally by your dealer to be 0.775V, 1.55V, 3.1V or 3.9V for full power.

The output for a loudspeaker is single or biwiring, using 4 mm banana plugs, spade lugs or stripped

wire.

It may interest you to know that the output voltage is 55 times the input voltage at maximum gain.

However the input signal current in the 20kOhm RCA input is only 38.8uA at full power, and the output

current is 10.7 Ampere at full power in 4 Ohm, as current gain is 275,000.

Power is voltage multiplied by current, so output power is 15,100,000 times larger than the power

of the input signal.

Yes, a power ampli er is a suitable name for what it does.

And note that this input signal power is still more than 10,000,000,000 times more powerful than the

residual noise power at the input.

So in 4 Ohm, full output power is more than 151,000,000,000,000,000 times larger than the input

noise power.

So do take care to place your signal cables apart from your loudspeaker cables.

They should not lie close together, and if they need to cross, they should cross at a 90 degree angle.

Do not use un-screened interconnect cables.

The current in the mains power cable is a very distorted version of the signal, and it contains very

high frequencies.

A special power cable can reduce radiation of interference, and it can improve your sound quality.