Pre-Amps - Classic 100 Series

Model no: QA-112-Mk2-HTR
C$1680 Untitled Document [US$ 1344]

QA-112-HTR-1 QA-112-HTR-1

pure tube organic line stage pre-amplifier with tube rectification

along with home-theatre bypass input and output and infra remote control

Using the most common 6SL7/6SN7 tubes in the amplification section, this pre-amp is built with a 6X5 tube rectifier which gives you the best medium size tube sound over small size tubes with such a low price. The sound is very liquid, dynamic, rich and warm with high definition. This is an all hand-wired state-of-the-art pre-amplifier for the tube section . This pre-amp also inplimented our famous component-to-component and point-to-point hand wiring technique, as well as our non-feedback organic pure tube sinigle-ended class A design, it can gives you exceptional super natural and open airy sound stage which other manufacturers no way to compete with such a low budget

We strongly believe the sonic performance of this unit easily surpass those products selling over US$ 6-8K in the audio industy

This pre-amp can use more than 10 different models of tubes to fine-tune the tonal quality as well as dynamics and richness, with optional tube expansion adapters, even can use 6L6, 6K6, 6G6, 6V6, 6F6, 6Y6,KT66,6550, EL34, 5881, KT88, KT99, KT100...etc

This HTR version comes with long-range infra-red motorized MALLORY remote volume control , remote control for input section as well as home-theatre bypass features

Main power switch at back , tube section power swtich in front , remote control circuit always enable as long as main power switch is ON.

The 6X5 tube rectifier can further upgrade by our super rectifier STR-104 or higher models, direct plug and play without any mod required.

With this super rectifier adaptor, you can use 300B, 2A3 , 45 , 50 , 80, 83, 1616 , 3B28 or 866A as rectifier tubes option.

Specifications
No. of inputs 2 sets of RCA inputs (CD / AUX) + one set of HT input
No. of outputs 2 setsof pre-amp outputs
Freq response 5Hz - 150Khz (-3db)
S/N better than 85 db (at max. output level)
Input impedance 82Kohm
Gain x3 - x6 depending on tubes
Phase 180deg inverted (option: non-inverted)
manufacturing hand-wired point to point for tube sections
Tubes 2 x 6SL7 (option: ECC35/ECC32/ECC33/6SN7/6SU7/6188..etc) + 6X5

(Note: The upgrade price below is a special deal for new orders only, modification of previously built unit will be around $300 higher than the following prices due to more works needed for disassemble of the original circuits)

Level 1 upgrade : (+ C$200)

Special designed "Super-Drive" circuit, output impedance lowered to 200ohm (can drive any power amp inputs from 600ohm up to infinity) with better bass control and punch , better definition and improved in overall tonal quality. By adding this upgrade, it sounds like the output with 10 pieces of power tubes being installed . With this level of upgrade, just add another $50 and you can have a headphone output with enough power and current to drive your headphone directly.

Level 2 upgrade : (+ C$500)

Level 1 upgrade + Enhanced input circuit design with increase of max. input levels , further lowering of distortion and increase dynamics, as well as better air and openness . Enhanced components quality for better sonic reproductions with higher resolutions.

Level 3 upgrade : (+ C$800)

Level 1&2 upgrade + Upgrade power supply with bigger transformer and stronger filtering circuit as well as enhancement in components for further sonic enhancement with more 3D holographics soundstage.

Level 4 upgrade : (+ C$1000)

Level 1&2&3 upgrade + Enhanced transformer with 5U4G tube rectifier for better air , smoother and sweeter sound quality

Additonal up-grade options:

0/180deg output phase selector add C$150

solid-oak chassis add C$200

1 year free parts and labor warranty under normal operation condition
standard chassis : Gold/ Black/Metallic MDF , Aluminum chassis

(optional chassis : Mirror steel, solid-oak, black piano ) with additional cost



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