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Silver GS-1 Front
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Black GS-1 Front
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Silver GS-1 at Angle
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Black GS-1 At Angle
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Silver GS-1 Back
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Black GS-1 Back
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GS-1 Internal View
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GS-1 Internal w/ No Modules
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Discrete Amplifier Module
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  GS-1 HEADPHONE AMP/PRE-AMP

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The HeadAmp GS-1 Headphone Amp/Pre-Amp is a new product resulting from 2 years of design work.  The amp has a brand new linear regulated power supply with exceptional filtering, an upgradable module-based amplifier circuit, and incredible build quality with extreme attention to detail.


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We believe that keeping a black background is one of the most important aspects in the design of any amplifier.  We connect a pair of one of the most sensitive headphones in the world to the amplifier in its high-gain setting, and crank the volume up - any level of hiss or hum is unacceptable.

The amp is housed in a lightly-brushed aluminum enclosure, measuring 10" W x 9" D x 2" H.  The enclosure and its thick, rounded sides is completed with a hand-finished 1/4" aluminum front panel.

A pair of RCA inputs, an active preamp output, and a loop (tape) output allow for multiple connections with your audio system.  The AC power jack accepts any standard power cord (included).  The amp can be ordered for either 100V, 115V or 230V usage.  We will automatically configure the amp for your shipping location unless you specify otherwise.

The two inputs are selected by a heavy-duty toggle switch on the front panel.  Next to it, an identical 2-position gain switch allows for amplification adjustment - a useful feature especially for low impedance phones or for preamplifier use.  Two headphone jacks, and a custom volume knob attached to an Alps Blue Velvet volume control make up the rest of the front panel.



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An optional DACT stepped-attenuator is available as the volume control on the GS-1.  The stepped-attenuator provides 24 separate volume positions with unparalleled matching of levels between the left and right channels.

A lot of thought has also gone into the module-based nature of this amplifier.  Each amplifier board is socketed on gold-plated pins and further secured with a pair of screws.  We will be releasing new amplifier modules in the future as we continue to evolve the design, so your amplifier will never become obsolete.  These module boards can be replaced/installed without difficulty or electronics knowledge.

SPECIFICATIONS

Device Type Solid State (JFET, Bi-Polar Transistors)
Class of Operation Pure Class A
Frequency Response 5Hz-50KHz +/-0.1dB
Signal-to-Noise Ratio >100dB
Total Harmonic Distortion <0.006%
Stereo Crosstalk >85dB @ 1KHz
Gain 3x / 9dB and 8x / 18dB
Input Impedance 50K ohms
Output Impedance less than 1 ohm
Output Voltage 15 Volts peak-to-peak
Output Power 1 Watt
Inputs/Outputs 2 RCA inputs, 1 RCA loop out, 1 RCA pre-out,
2 1/4" headphone outputs
Operating Voltage 100-120VAC or 220-240VAC
Power Consumption 15 Watts
Chassis Dimensions 10.0 (L) x 8.5 (W) x 2.0 (H) inches
Weight 6lb / 2.7kg