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  1. #1
    Administrator Tracy Rainwater's Avatar
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    Sep 2003
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    Parasound Updates A21 and A23 Amplifiers (A21+ and A23+)

    Parasound has announced updates on two of their popular Halo amplifiers. The new A21+ and A23+ replace the A21 and A23 with new cosmetics and a few more changes under the hood.

    The A21+ and A23+ both have a few updates to the outside. The new models have a newly designed faceplate and company logo with aluminum endcaps. There is also a verticle gold accent on each end of the front face.

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    Around back, the two also have upgraded speaker binding posts replacing the older ones with a new set that is also carried over to the company's new HINT6 integrated amplifier.

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    Inside, both amps get a new power transformer and higher rated filtering capacitors which result in a bit more power. More power is better, right?

    Here's the list of updates for both amps.

    Changes from the original A 23→A 23+
    • 125 → 160 Watts (8Ω)
    • 225 → 240 Watts (4Ω)
    • 400 → 500 Watts (bridged)
    • Filter cap: 40,000 uF →54,400 uF
    • Crosstalk (20kHz): 63dB → 70dB
    • Transformer size: 1.0 kVA → 1.1 kVA
    • Refined Halo cosmetic with aluminum end caps & gold highlights
    • Updated rear panel with heavy duty speaker terminals from HINT 6
    • Upgraded internal gold on gold audio connections
    • Updated auto turn on circuit


    Changes from the original A 21→A 21+
    • 250 → 300 Watts (8Ω)
    • 400 → 500 Watts (4Ω)
    • 750 → 1000 Watts (bridged)
    • Filter cap: 88,000 uF → 108,000 uF
    • S/N: 112dB → 115 dB
    • THD (at full power): 0.2% → 0.1%
    • Crosstalk (20kHz): 63dB → 70dB
    • Transformer size: 1.2 kVA → 1.3 kVA
    • Weight: 60 LB → 71 LB
    • Refined Halo cosmetic with aluminum end caps & gold highlights
    • Updated rear panel with heavy duty speaker terminals from JC 5
    • Upgraded internal gold on gold audio connections
    • Updated auto turn on circuit


    For more information on these or any Parasound product visit the company's product page. http://www.parasound.com/products.php

  2. #2
    Senior Member David Vaughn's Avatar
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    Jul 2002
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    Northern, CA
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    13,971


    Parasound makes great amps and their owner is one of the nicest people you will ever meet.
    David Vaughn
    Technical Writer/Blu-ray Reviewer
    Sound and Vision Magazine

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