Hybrid Power Amps

Model no: HP-70
C$1,680 Standard Version / C$1,480 Budget Version Direct Order Price

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70Wrms / channel single-ended tube  hybrid power amplifier

This is one of our state-of-the-art hybrid power amplifiers that combines both the advantage of a transistor amps high current drive (tight bass and good speaker control) and single-ended vacuum tubes amplification (warm and sweet sound with good depth, sound stage, and air). The transistor output stage of the standard version is a voltage to current converter circuit without any NFB or voltage gain, so the non-linear sound of transistors can be greatly eliminated. Left behind is the high damping factor that controls the speaker more efficiently. The tube section is working in an optomized single-ended operation mode to achieve the purest and most natural tonal quality.

If you were unaware of this amplifiers construction, and you judged the sound quality by listening only, you would believe it was a pure tube power amplifier and not a hybrid.You can then have both the smooth and silkyness of single-ended sound with very good punch, rich and controlled bass.

Upper photo set is for standard version (C$1,680), mid photo set is budget version (C$1,380) built with additional dual volume control pair(optional C$100) , you can choose to use either 6922x2 or 6SL7/6SN7x2 (optional $80) when placing the order

Second to lowest photo sets show the budget version with 6SL7/6SN7 upgrade

Lowest photo sets show an ultimate integrate amp version with 6SL7 + 6L6G plus upgraded power supply

Balanced input version available with additional cost

Specifications
No. of inputs 1 set of RCA inputs  (option:XLR balanced inputs)
No. of outputs 1 set of speaker outputs
Freq response 1Hz - 150Khz (-3db)
S/N better than 90 db
Gain x15 - x25 depending on tubes (budget version gain is fixed)
Phase

180deg inverted (standard version) or

non-inverted (budget version)

manufacturing hand-wired point to point for the tube section (standard version)
Tubes used 2 x 6SL7(default)/6SN7/6SU7/ECC32/ECC33/ECC35/6188
  or 2 x 6922(default)/ECC88/ECC85/6DJ8/6CG7/6BQ7

         

1 year parts and labor warranty under normal operation conditions
standard chassis : Metallic  MDF / Aluminum chassis

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

 



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