Summary of Contents for U-sound OP 50
- Page 2 The OP 50 is a 50 watt tube head with 2 EL34 output tubes and 4 ECC83 (12AX7) tubes. The availability of three channels with various adjustments allows the OP 50 to be used in a wide variety of styles of music - from blues to classic rock, hard rock, as well as for powerful metal riff...
- Page 3 Initial Installation of the ampli er. We recommend the following presets when you turn on your ampli er for the rst time. Select the load impedance with the IMPEDANCE switch according to the impedance your guitar cabinet. Set the MASTER VOLUME control on the rear panel to .
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Page 4: Front Panel Controls
Front panel controls. POWER - Switch for turning on the ampli er. STANDBY The toggle switching of the anode voltage. Turns on 5-15 minutes after turning on the POWER toggle switch. PRESENCE - Presence adjustment. Works on all channels. BASS - Bass control for channels and - Middle control for channels and TREBLE... -
Page 5: Return Level
Rear Panel Control. FUSE RETURN LEVEL - Adjusts the signal level from the output of the effects processor. Works with the included FX LOOP toggle switch. SEND - This is where you plug the INPUT of your Effect(s). RETURN - This is where you plug the OUT of your Effect(s). FX LOOP - Effects loop toggle switch. - Page 6 Warranty, service conditions, precautions. U-Sound Op50 is a sophisticated device built on very high quality components, requiring due regard and compliance with the rules for the operation of tube ampli ers. Follow the instructions to turn on and set up your ampli er.