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QUAD II CLASSIC MONOBLOCK POWER AMPLIFIER PAIR |
SKU: 106066 |
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24
MONTHS
GUARANTEE |
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Details:
| The brand-new Quad II Classic doesn't just approximate its forebear. Quad didn't set out to improve on or update the original, but rather to manufacture it again, the way it was. The circuit remains precisely as Peter Walker designed it more than half a century ago, and details of its construction have changed only where certain physical types of parts are virtually extinct (old capacitor shapes and their associated clamps, cloth insulation, and so forth) or where a change is required by law (eg, the new Classic has a cage to protect people and hot tubes from one another, an IEC-style AC cord socket with an integral power switch, and contemporary, CE-approved gold-plated speaker terminals). In every other way, the Quad II Classic is a Quad II. |
| The Quad Classic, is a class-A push-pull monophonic amp with only two active stages. The input stage contains two EF86 miniature pentode tubes, each of which is capacitor-coupled to its own output tetrode tube, but only one of which (call it input tube No.1) gets the original input signal. From there, in addition to driving its corresponding output tube, input tube No.1 drives input tube No.2 with a portion of its reverse-phase output, attenuated by some 6dB. Thus the output of the second EF86 is equal to but out of phase with the output of the first, and this balance is maintained through the output transformer's primary, where the full music wave is put back together. |
| A faithful reproduction of the original, the new Quad II Classic offers audiophiles the chance to recreate the spirit and atmosphere produced from one of the most famous amplifiers in audio history. The circuit used in the Quad Classic amplifiers is virtually identical to that used in the original Quad II. What has changed dramatically is the standard of components used. Quad have scoured the globe for the very finest vacuum tubes, balanced and matched perfectly. The transformer is, in itself, a work of art. Everything is hard-wired and hand crafted with incredible precision. |
| The II-forty uses KT-88s, rather than the original KT66s in push-pull orientation for the output stage (for more power). The input valves are 6SH7s (military spec.) and the rectifier is a 5UG4. The II-classic is virtually identical to the original 1950s design.
The pre-amplifier supplied with the system is a completely new design. It uses a very special high-end military 6111 twin triode, which is so reliable and accurate, it has been hard-wired into the circuit.
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| All inputs are line-level. It uses relay signal switching to preserve signal integrity. This is one of the most neutral and transparent pre-amplifiers available today. It contains no tone controls, has no remote control. Quite simply, it adds nothing and takes nothing away from the signal. |
- Complete Stereo pair of valve power amplification - 2 units
- The champagne finished chassis is strong and heavy, internally wired with solder tags - not PCBs
- The KT-88 output valves in push-pull configuration are visually stunning.
- Gorgeous styling, superb build quality, perfect ergonomics.
- Gold-plated phono connectors.
- The input valves high-end military 6111 twin triodes.
- Relay signal switching to preserve signal integrity.
| Specifications: |
- Total harmonic distortion
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0.3% at 12 Watts |
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