andreus A-22 Instrukcja obsługi - Strona 8

Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Wzmacniacz andreus A-22. andreus A-22 13 stron. Head and combo

Rear Panel

1. FUSES –

Always use correctly rated fuses. The MAIN fuse should be replaced

only with a 1.5 Amp "Slow Blow" 250 volt type. The H.V. fuse should be replaced

only with a 500mA (1/2 Amp) fast acting 250V type. Always unplug the AC cord

before changing fuses. When installing a new fuse, first insert it into the cap of the

fuse holder, then while holding only the cap, insert the fuse into the holder, push in

and turn clockwise to lock the cap and fuse in place.

2. BIAS TEST POINTS AND ADJUSTMENT CONTROL

provided for ease of measurement and adjustment of the idle current of the output

tubes. Bias adjustment is necessary whenever the output tubes are replaced.

See page 9 for bias adjustment instructions and precautions. The adjustment

control is located on the underside of the chassis near the test points.

3. SPEAKER JACKS –

cabinet is to be used, meaning that two cabinets will be connected at the same

time, connect the second cabinet to the jack labeled EXT. This amplifier produces

22 watts RMS output power before clipping. When the amp is driven into distortion

at high volume, the output power can exceed 40 watts. Make sure any speakers

you connect can handle the output power of the amp. Always set the impedance

selector switch to match the correct speaker load. See chart below. NEVER

OPERATE THE AMPLIFIER WITHOUT A SPEAKER CONNECTED OR DAMAGE

MAY OCCUR AND THE WARRANTY WILL BE VOID.

Speaker "Break-In" – New speaker cones are tight and stiff. This results in a

brighter tone with less bass and low mids and may even be considered "harsh" at

times. By the time your speaker has been played hard for 20 to 30 hours or more,

its true character and tone will become apparent. Until your speaker is fully

broken-in, you may find that you can achieve better tone by reducing the

PRESENCE and/or TREBLE controls.

IMPEDANCE SELECTOR – Always set this switch to the proper speaker load

according to the chart below. Note: The A-22 combo incorporates a built-in

8 ohm speaker so leave it set to 8 when not connecting another cabinet.

Setting For One Cabinet

One 4 ohm cabinet

One 8 ohm cabinet

One 16 ohm cabinet

Always use the jack labeled MAIN first. If an additional

For Two cabinets

Two 8 ohm cabinets

Two 16 ohm cabinets

– These are