Phono Preamplifiers

The Analog line is where Swan Song Audio started building consumer-oriented products. Products include:

SE MM/MC
SE MM/MC Phono Preamplifier
  • Single Ended Moving Magnet / Moving Coil Phono Preamplifier
  • Instrumentation Moving Magnet or Moving Coil Phono Preamplifier
  • Instrumentation Transimpedance (I to V) Phono Preamplifier

Single Ended Moving Magnet / Moving Coil Phono Preamplifier

Phono Back
Phono Preamplifier Back

Small but mighty, this small package offers excellent performance. 1 volt rms, or greater, output is supported for 0.4 to 5mv cartridges. 

Instrumentation Phono Preamplifiers

Instrumentation with output meter and balance adjustment
Instrumentation Phono Preamplifier with output meter and balance adjustment

The instrumentation line is based on the instrumentation style balanced to single ended amplification methodology.  The method is so named because it is this design that is used in sensitive measurement and hospital equipment.   Changes to the basic phono include:

  • Instrumentation style balanced to single ended first stage amplification
  • Digital switching circuitry
  • Dedicated as MM, MC, or I to V 
  • Tighter RIAA tolerances
  • Larger chassis
  • Additional power filtering and handling capabilities
  • Built in volt meter for gain setup, channel balance, and grounding verification

Gain settings are user adjustable from 42 – 74dB for the MM and MC options. This supports cartridge outputs from 0.3 to 6mv.  Lower output MCs are handled by the I to V model which supports 30 to 500 microamps output currents as defined by the cartridge output voltage divided by the internal resistance. 

The instrumentation line brings the increased detail and low noise levels found in the best of high end phono preamplifiers without the ultra high end price.

Here are two sample clips from the SE Phono and the ADC using a Sumiko Pearl MM cartridge.

Sample1.wav

Sample2.wav

Here is the same song used for Sample 1 with the SE Phono.  This time it is played through the I to V phono, into the 6SN7, out of the 6SN7, and recorded by the ADC.

6sn7_ItoV_sample.wav

Here is a sample of a early 1960's recording through the Instrumentation I to V Phono and recorded by the ADC.

ItoV Sample.wav

Here is a sample of a early 1960's recording through the Instrumentation MC Phono and recorded by the ADC.

MC Sample.wav

Click here to access documentation videos on youtube

Tech

Single Ended Phono Preamplifier

1 kHz “Wien Bridge” test signal 0.0025% distortion used for testing.  This sets the base level noise floor at -96dB.  See digital tech for 5 kHz range viewpoint.
1 kHz “Wien Bridge” test signal 0.0025% distortion used for testing. This sets the base level noise floor at -96dB. See digital tech for 5 kHz range viewpoint.
  • MC and MM cartridges
  • Gains of  49, 55, 58, 62, and 65dB
  • .2dB accuracy at the RIAA points
  • Distortion less than .02%
  • Loading options of 25, 33, 77, 83, 100, 194, 330, 470, 2K, 47K, 100pf
  • 2.5”h 4”w 5.5”d

Instrumentation Phono Preamplifier

SE in MC mode with 0.5mv input.  Noise floor is increased by 5 dB. -78dB harmonic at 2 kHz.
SE Phono Preamplifier in MC mode with 0.5mv input. Noise floor is increased by 5 dB. -78dB harmonic at 2 kHz.
  • MC and MM cartridges
  • Gains of  42 – 74dB or 30 to 500 microamps output current
  • .2dB accuracy at the RIAA points
  • Distortion .01 to .02%
  • MC loading 20, 33, 50, 100, 200, 300, 480, 1020
  • MM loading 47K with 100pf, 120pf, 150pf, 180pf, 220pf, 270pf, 330pf
  • 2.5”h 4”w 8”d
I to V with 50  micro amps of source current.  Noise floor is close to the source.  -85dB harmonic at 2 and 3 kHz.  Harmonics + 5dB more than source.
I to V Phono Preamplifier with 50 microamps of source current. Noise floor is close to the source. -85dB harmonic at 2 and 3 kHz. Harmonics + 5dB more than source.