Pre-Amps - Classic 100 Series

Model no: QA-116-Mk2
Separate Power Supply Version for C$3,680
Direct Order Price

line stage pre-amplifier with 600ohm balanced output transformer

Using 6SL7 tube in the amplification circuit, and 6SN7 in the output, this configuration drives a pair of very high grade 600ohm balanced output transformers, which can give you exceptional richness and a warm feeling inside the music. The layering of musical instruments and the naturalness of the music will be further enhanced. The 6SN7 driver stage is a state-of-the-art design by the resident engineer, Albert, which allows the output transformer to be driven without a coupling capacitor, and will not have any DC current passing through the transformer (DC current passing through the transformer will degrade the low and high frequency response, because DC current will saturate the Tx iron core). This unit is built with a 5U4G tube rectifier and enhanced power supply, which gives you the best price-performance in this type of configuration.

There is one up-grade option available with this model of pre-amp, the new version can be built with a direct tube / transformer selectable RCA output. That option makes this pre-amp sound quality somewhere between the QA-115 and QA-116. For some faster types of music, not employing the output transformer can be an advantage, but for some classical, vocals and jazz, using the output transformer will definitely have certain advantages. A switchable output configuration is an excellent idea in order to match any type of music and audio system.

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.


No. of inputs 3 sets of  RCA inputs 
No. of outputs 1 set of RCA (direct tube/transformer) and 1set of transformer balanced pre-amp outputs , 1 set of RCA record outputs
Freq response 10Hz - 50Khz (-3db) (transformer output)

2Hz - 100Khz (-3db) (direct tube output)

S/N better than 70 db (transformer output)

better than 80db (direct tube output)

Distortion less than 0.5% at 1Vrms output
Gain x5- x10 depend on tube
Phase non-inverted (transformer output)

180 deg inverted (direct tube output)

manufacturing hand-wired point to point
Tubes 2 x 6SL7 + 2 x 6SN7 + 5U4G

Add C$300 up-grade to direct/transformer output selectable


1 year parts and labor warranty, tubes 90 days under normal operation conditions
standard chassis : Gold/ Black/Metallic  MDF , Aluminum chassis

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

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