Model no:QA-001-Mk2

(dual input and dual output version in solid oak)

(standard version)

(standard version)

(dual output version)

(standard version)

(standard version)

(dual input version)

(standard version)

(dual output version with 2-tone solid-oak)

(Aluminum chassis version with dual inputs)

(Black metal chassis version)

line stage pre-amplifier

Using the most common 6SL7 as the amplification section gives you the most warm and easy rendition with such a low price. Once you experience this starting model of our products superior performance, you will see our higher models are beyond comparison.

This is one of our best selling models of pre-amplifiers. It can easily surpass the sonic performance of competitors US$2,000-$3,000 offerings.

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 additional tube expansion adapters, even can use 6L6, 6K6, 6G6, 6V6, 6F6, 6Y6,KT66,6550, EL34, 5881, KT88, KT99, KT100...etc

No. of inputs 1 set of RCA inputs (optional: no. of inputs from 2 to 12 max.)
No. of outputs 1 set of RCA outputs (optional : dual RCA outputs)
Max. input level 2Vrms (optional: 4Vrms with no additional charge)
Freq response 2Hz - 100Khz (-3db)
S/N > 85 db
Gain x3- x6 depend on tube types
manufacturing hand-wired point to point
Phase 180deg inverted (option: non-inverted)
Input impedance 68Kohm (option: from 10Kohm to 1Mohm)

Default tube : 6SL7 (alt : 6SN7/6SU7/ECC32/ECC33/ECC35/6188 or equiv)

(Note: The price quoted is a special deal for newly order unit only, modification of existing 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 resoltuions.

Additonal up-grade options:

0/180deg output phase switch add C$150

solid-oak chassis add C$150

Aluminum chassis add C$50

1 year free parts and labor warranty under normal operation conditions
standard chassis : Gold/ Black/Red-brown/Blue/Green/Silver MDF chassis

(optional chassis : Aluminum, Mirror steel, solid-oak ,black piano)