Pre-Amps - Classic 100 Series

Model no:   QA-116-sp-Mk2
C$2,680 Untitled Document [US$ 2144]

 

QA-116.jpg QA-116.jpg

line stage pre-amplifier with balanced + RCA output

Using NOS MULLARD EL32 as the amplification, and 6L6G as the output driver makes this state-of-the-art pre-amplifier sublimely attractive. This is the No transformer version of QA-116 but still has the same legendary richness and finesse in the sound quality.

With this pre-amplifier,the background is so quiet that it makes you easily aware of microdetails like the background noise of the recording studio. The 6lG6G output buffer section provides very exceptional driving capability to eliminate any absorption of information from the cable and power amp input. By changing the set of output drivers with tubes like EL34, 6G6G, 6Y6G...etc, you can then change the tonal quality and weight of the signal. This unit is handbuilt with a 5U4G tube rectifier and enhanced power supply which gives you the best price-performance in this type of pre-amplifier.

A stand-by switch is also featured in this model, which lets the unit stay turned-on all the time (24hrs/day) in stand-by mode. With just a switch back to normal mode when in operation, the warm-up time of the unit will be shortened from 15min to less than 1min.

A Diode-Enable switch for the rectifier section is also featured in this unit to have tighter bass control and punch when listening to music which requires faster dynamics and pace. This is a 3-way mode selection switch, you can select between tube rectifier only or tube + diode rectifier or diode rectifier only .

The photo shows a standard MDF chassis in a gold color.

Now available with a 5U4G super rectifier tube, this option can greatly enhance the dynamics, high and low frequency extension, and bass punch. A stand-by switch for pre-heating of the rectifier tubes ensures the dynamics, high and low frequency extension, and bass punch. A stand-by switch for pre-heating of the rectifier tubes ensures the dynamics, high and low frequency extension, and bass punch. A stand-by switch for pre-heating of the rectifier tubes ensures the  

The 5U4G 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 3 sets of  RCA inputs  (max. input level 5Vrms)
No. of outputs 1 set of RCA + 1 set of XLR pre-amp outputs , 1 set of RCA record outputs
Freq response

2Hz - 100Khz (-3db) 

S/N > 85 db
 Input impedance  68Kohm (option: from 10Kohm to 1Mohm)
Gain x3-x6 depend on tubes
Phase

180 deg inverted 

manufacturing hand-wired point to point
Tubes 2 x Mullard EL32  (option: CV1052)

+ 4 x 6L6G(option: 6L6G/6Y6G/6K6G/6V6G/EL34/KT66/KT88/6550)

 + 5U4G (option: 274B/5R4/5V4/EZ32/5AR4)

(Note: The price quoted below are special deals for newly order unit only, modification of existing unit will be around $300 more due to more works needed for disassemble of the original circuits)

Level 1 upgrade : (+$C200)

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.

 

   

Additional Upgrade option:

add 0/180 deg phase control switch with additional of C$150

solid-oak chassis add C$250

Super high gloss piano solid-oak finish add C$500

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

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



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