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Audio Research SP-6B All Tube Preamp with Phono Stage ...

    https://skyfiaudio.com/products/audio-research-sp-6b-all-tube-preamp-with-phono-stage-in-box#:~:text=Audio%20Research%20SP-6B%20All%20Tube%20Preamp%20with%20Phono,%20%20Yes%20%202%20more%20rows%20
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The Vintage Beat: Audio Research SP-6B, Harmon Kardon ...

    https://jeffsplace.positive-feedback.com/the-vintage-beat-audio-research-sp-6b-harmon-kardon-citation-1-and-mcintosh-mx110-preamplifiers/
    Even in its stock state, the vintage Audio Research SP-6B is an easy recommendation for a vintage preamplifier that won't break the bank, and …

Audio Research SP-6B All Tube Preamp with Phono Stage ...

    https://skyfiaudio.com/products/audio-research-sp-6b-all-tube-preamp-with-phono-stage-in-box
    Audio Research SP-6B All Tube Preamp with Phono Stage - With Original – SkyFi Audio Audio Research SP-6B All Tube Preamp with Phono Stage - With Original …

Audio Research SP-6B | Audiokarma Home Audio Stereo ...

    https://audiokarma.org/forums/index.php?threads/audio-research-sp-6b.784292/
    http://www.arcdb.ws/SP6/SP6.html. 500 ohms at 1kHz, rising to 2.1 kOhms at 20Hz, all outputs. Recommended minimum load for maximum audio quality, 20 kOhms. SP6-B: Less than 500 ohms main output, 1000 ohms tape output. Recommended minimum load for maximum audio quality, 50 kOhms and 250 pF maximum capacitance.

Tubes for the Audio Research SP 6B | Antique Electronic Supply

    https://www.tubesandmore.com/sets-by-amplifier/audio-research/sp-6b
    The Audio Research SP 6B amplifier requires the following components: × 6. 12AX7. Type: Please make a selection above. Russian made reissue of the original Tungsol. ...

Review: Audio Research SP-6b Tube preamp

    https://forum.audiogon.com/discussions/review-audio-research-sp-6b-tube-preamp
    The SP-6B in its day was an excellent preamp, however it has been eclipsed by more recent designs. The noise floor is excessive, and frequency extremes are attenuated. The midrange is smooth, airy and typical of the better tube units. More recent ARC preamps (i.e. SP-14) are notably superior, for a modest increase in expense.

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