New Harman Kardon amp!!!

proffitt
proffitt Posts: 157
edited April 2013 in Electronics
Ok, I just picked up my very first dedicated separate amp. It's certainly not new, just new to me. It's an HK Citation 22. My question is on setup. My speakers are SDA SRS 2. I think I've heard they are rated at 6 ohms? So the amp has a setting to select either 8 ohm or 6 ohm. Which should I use? Also, the amp has a lug for ground. Short of driving a ground rod through my basement floor, what should I connect this to?

Thanks for helping with my elementary questions!
Post edited by proffitt on
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  • proffitt
    proffitt Posts: 157
    edited April 2013
    Sorry, correction. The amp has setting to select either 8 ohms or 4 ohms. Which should I choose?
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  • thsmith
    thsmith Posts: 6,082
    edited April 2013
    4 ohms but you can try both and see which you like the best.

    I tried 4 and 8 ohms on my 8 ohm LS90s, 8 ohm sounded much better.
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
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  • FTGV
    FTGV Posts: 3,649
    edited April 2013
    proffitt wrote: »
    The amp has setting to select either 8 ohms or 4 ohms. Which should I choose?
    There will be more power available in the 8 ohm mode but that could result in excessive heat generated in the ouput section if driving lower impedance speakers hard.Switching the selector to 4 ohm mode lowers the main rail voltages so less heat will be generated( safer operating temp range for output transistors)but also results in a reduction in peak power.
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  • EndersShadow
    EndersShadow Posts: 17,590
    edited April 2013
    Pics or it didnt happen :smile:
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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  • proffitt
    proffitt Posts: 157
    edited April 2013
    my bad, another correction. This link:

    http://www.polksda.com/sdasrs2.shtml

    Says that the speakers are 4 ohm. So I should set the amp selctor from 8 ohm to 4 ohm, correct?

    I tried it last night on both settings, and the 8 ohm seemed to offer much more umpf.

    I guess I am in danger of damaging equipment in the 8 ohm setting?
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  • WLDock
    WLDock Posts: 3,073
    edited April 2013
    I think you would be fine at 8 Ohms for moderate listening and 4 Ohms for rocking out....IMO.
    2.2 Office Setup | LG 29UB55 21:9 UltraWide | HP Probook 630 G8 | Dell Latitude | Cabasse Stream Amp 100 | Boston Acoustics VS 240 | AUDIORAX Desk Stands | Mirage Omni S8 sub1 | Mirage Omni S8 Sub2
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  • PolkieMan
    PolkieMan Posts: 2,446
    edited April 2013
    I would set it at 4 ohms. You should notice more heat with it set at 8 ohms.
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
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    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
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  • boston1450
    boston1450 Posts: 7,640
    edited April 2013
    Hope you LOVE your new HK unit. Enjoy and keep us updated
    ..
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