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Usher - P-307 A - Preamplifier

Usher - P-307 A - Preamplifier 

P-307 is the control center of today’s high end sound systems. Its two main functions are source selection and volume control. Every effort has been made to keep P-307 as accurate as possible.

To avoid unwanted interactions with adjacent source components, P-307 uses high-quality relays and switching designs to ensure that every source is intact. Thus all sources remain separate from one another and from the power amplifier and cables.

In the digital age, analog pre-amplifiers remain the most reliable and neutral-sounding component of controlling volume. P-307 uses a superior attenuator
that offers a neutral sonic performance.

Since AC power supply generates noise, P-307’s power supply is housed in a separate chassis. Thus P-307’s audio circuits are exposed only to quiet, regulated DC power and the audio signals itself.

USHER P-307 is a modern, reference-level preamplifier. After all, it is only when P-307 reveals the palpable imaging focus and soundstage, the sense of ease and rhythmic flow, as well as the delicate subtlety of musical details that make listening to music a real enjoyment.

For music lovers, USHER P-307 Stereo Pre-amplifier is the rare and
affordable high end in town.



Manufacturer:  Usher
Model Number:  P-307A


Frequency Response:  10Hz~100kHz
Total Harmonic Distortion (THD):  N/A
Intermodulation Distortion (IM):  N/A
Signal to Noise Ratio Phono (Optional):  105 dB


Audio Input UnBalanced:  N/A
Audio Input Balanced:  N/A
Digital Audio Input:  7 Stereo single-ended(RCA)
Digital Optical Input:  N/A
Digital USB Input:  N/A
Digial Coaxial Input:  N/A
RS 232 Control Input:  N/A
Input Sensitivity:  N/A
Input Impedance - Line:  47k Ohm


Sampling Frequency:  N/A
Frequency Response:  N/A
Deemphasis:  N/A
Input Format Dig in Opt/Coax:  N/A
USB Input:  N/A
DSD via USB:  N/A
Synchronous USB-Input:  N/A
TIM (related to digital 0):  N/A


Phono Input - Moving Magnet:  1
Phono  Input  - Moving Coil:  N/A
Phono Sensitivity - Moving Magnet:  N/A
Phono Sensitivity - Moving Coil:  N/A
Signal to Noise Ratio - Moving Magnet:  N/A
Signal to Noise Ratio - Moving Coil:  N/A


Pre-Out:  2 Stereo single-ended(RCA)
Audio Output UnBalanced:  N/A
Audio Output Balanced:  N/A
Digital Audio Output, Coaxial:  N/A
Digital Audio Output, Optical:  N/A
RS-232 Control Output:  N/A
Analog Audio Output:  N/A
12 Volt Trigger Outputs:  N/A
Ditigal to Analog Record Out:  N/A
Analog Record Out:  N/A


Power Supply:  100V,120V, 200V, 230V or 240V AC@50/60Hz
Dimensions:  16.93" x 11.34" x 3.11"
Shipping Dimensions:  22.05" x 13.78" x 6.3"
Weight:  8.82 lbs
Shipping Weight:  11.02 lbs
Warranty:  10 Years


 Gain:   14.3 dB
 Input Overload:  2.34V rms
 Output Impedance:   120 Ohm
 Maximum Output (Main Outputs):   15.3V rms
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