II–forty & QC–twenty four Valve Amplification System Quad Electroacoustics Ltd, IAG House, Sovereign Court, Ermine Business Park, Huntingdon PE29 6XU www.quad-hifi.co.
Important Safety Precautions - Please Read Carefully! CAUTION ! RISK OF ELECTRIC SHOCK - DO NOT OPEN! The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
SPECIFICATIONS Valve preamplifier Valve complement 1x 6111 twin triode THD @ 1V RMS < 0.2% Frequency Response 5 Hz - 50 KHz (+0 dB/-0.5 dB) Hum and Noise Better than - 80 dB Line stage gain 15 dB Recommended minimum load 50 k Ohms Inputs 5 x Line level* 2 x Buffered tape loops Power Consumption 15 VA maximum * Note: Phono input is line level until optional phono stage is added Monobloc valve power amplifier Power output 40W RMS THD @ 700 Hz 0.3% @ 40W 0.
ADDITIONAL INFORMATION IMPORTANT NOTES Running In European Union Directives: Most high fidelity equipment works better after it has been run in for some time. In the case of valve amplifiers the period of running in is much more important. Components that go into valve equipment work at voltages and temperatures far higher than their solid-state counterparts and when new they should spend an extended period at those working temperatures to bed in properly.
GUARANTEE AND PRODUCT REGISTRATION OPERATION Phono Tuner CD Selector Selector Selector Tape Monitors Auxiliary Sources Balance Control Volume Control On/Off Switch b c d e f g h i 4 5 3 Phono Tuner Tape 1 Tape 2 7 8 9 1 Aux 1 Aux 2 Please complete and return the enclosed Warranty registration form. Within the warranty period QUAD will undertake replacement of defective parts free of charge provided that the failure was not caused by misuse, accident or negligence.
Connecting the QUAD II – forty power amplifiers INSTALLATION If this is your first valve amplifier please familiarise yourself with some issues surrounding the safe use of the QC – twenty four and QUAD II – forty. Valves get hot Valves (tubes) function by thermionic emission, which requires heat. Additionally, the power amplifiers generate a lot of heat even with no input. Therefore it is vital to ensure adequate ventilation for your valve equipment especially power amplifiers. 220V ~50Hz T1.
Connecting the QUAD QC – twenty four Preamplifier Control Unit Preamp Outputs Fused IEC Mains Input Tape Monitor Inputs & Outputs Phono Input Line Level Inputs Signal Ground To connect a cable to the Ground terminal: Partially unscrew the top section of the terminal. Strip about 8mm of insulation from the ground wire and curl the bared end clockwise around the terminal post. Tighten securely, but do not overtighten. Connecting the QC – twenty four to a power amplifier (refer to fig.
Connecting the QUAD QC – twenty four to the QUAD II – forty (refer to fig. g above) MAINS WORKING VOLTAGE AND FUSE RATINGS The rated voltage for this unit is marked on the rear panel. Please check with the dealer if you intend to use the equipment in regions which use different values of mains voltage. QUAD manufactures equipment to the following nominal mains voltages.
Recording, Monitoring and Playback INTRODUCTION Selecting either Tape 1 or Tape 2 enables you to play any audio equipment connected to that input in the same way as the other high level inputs. When you select any source from CD, Tuner, Phono, Aux 1 or Aux 2, the selected source is also connected to the Record outputs of both Tape 1 and Tape 2 so you can record the programme simultaneously on two recording units in addition to listening via loudspeakers.
Overall volume levels Output levels from different audio source components in a high fidelity system often vary dramatically. For instance, it is not unusual for a CD player to produce levels significantly higher (18 dB and more) than an FM tuner. So, always turn the volume control down before changing sources as the resulting surge could damage your loudspeakers. It follows that the position of the volume control is not an infallible guide as to 'how loud' the equipment will go.
