Whistle from center speaker after turn off? | Model 7700 and 7500 Amplifiers | The Outlaw Saloon

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#77579 - 08/12/06 11:38 AM Whistle from center speaker after turn off?
jmschnur Gunslinger Registered: 07/28/06 Posts: 29 Loc: VA	My Martin Logan Center Speaker makes a high pitch sound (very low level) about 2-3 minutes after my system is turned off. It last for 5-10 seconds. I assume this is caused by the power being disspated as the 7500 amp I have turns off ( capacitor) discharge. This occurs when the Cinema i speaker is attached to any of the 5 output channels. I do not hear this from any other speaker in the system (ML Vantages, NHT rear surrounds). All speakers sound fine when operating. Is this normal and what is causing it? Joel
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#77580 - 08/14/06 03:00 PM Re: Whistle from center speaker after turn off?
kryten_tl Deputy Gunslinger Registered: 02/22/06 Posts: 8 Loc: Houston	I can hear this also from my Polk mains, very, very faint though. I assume that it is just normal capacitor discharge. I think that it actually sounds pretty cool, but I think that it is normal. _________________________ Fronts: Paradigm Studio 100 v.4 Surrounds: Polk TC615i Center: Paradigm CC-590 Sub: SVS PB-12Plus/2 Amplifier: Outlaw 7500 Receiver: Integra DTC 9.8 DVD/CD: Sony DVP-CX995V HDTV: Sony KP-51HW40 RC: Philips TSU-6000
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#77581 - 08/14/06 11:15 PM Re: Whistle from center speaker after turn off?
rumatt Gunslinger Registered: 12/17/02 Posts: 21 Loc: NY	Is your center bi-amped? If I biamp my paradigm studio 60's using 4 amps from the 7125 it whistles when I shut it down. It sounds like a police siren about 20 seconds after I shut off the amp. It doesn't do this if I use one amp per speaker.
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#77582 - 08/15/06 02:43 PM Re: Whistle from center speaker after turn off?
jmschnur Gunslinger Registered: 07/28/06 Posts: 29 Loc: VA	One amp for the ML Cinema I. ML has told me they need somec serious vacuuming. We shall see. joel
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#77583 - 08/16/06 10:34 AM Re: Whistle from center speaker after turn off?
jmschnur Gunslinger Registered: 07/28/06 Posts: 29 Loc: VA	Vacuumed hard. Speaker sounds fine. Whistle is still there. I will live with it. Joel
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#77584 - 08/16/06 11:49 AM Re: Whistle from center speaker after turn off?
nfaguys Desperado Registered: 04/09/05 Posts: 500 Loc: Maine	jmschnur wrote: I will live with it. May I suggest you ask outlaw-tech support and then decide. _________________________ Living Room: 5.1 Surround and 4channel inline room 990/7700/6-KEF-107s/LFM1 x 2/ SMS Awaiting Trinnov Millenium dts decoder;Digital Director Players: Tascam CD01U/SonyCX455 x 3/DV955/BDP83 Old Sony 60" SXRD TV Zone 2 (also liv-Room: listening to music while Mrs watches TV): Crown SL2 preamp/D40 Amp/Stax Headphones My "Man-cave": 4 channel-only inline room. No TV (thank heaven)!!! 990/755/4-KEF 107s Tascam CD01U/dts decoder/digital director Alesis 16x4x2 mixer Recorders Alesis HD24/ML9600/Crown CX844s/SonyDAT/Tascam DA38 Ham Radio Shack (KB1STH) ICOM/Yaesu/Drakes x 3
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#77585 - 08/16/06 02:18 PM Re: Whistle from center speaker after turn off?
jmschnur Gunslinger Registered: 07/28/06 Posts: 29 Loc: VA	I got this from Scott-so now I know. "Thanks for contacting the Outlaws! What you are hearing is the sound of the capacitors discharging. Some speakers are more sensitive to reproducing this sound than others. it is entirely harmless and will not impact your speakers performance. Please let me know if you have any further questions. Thanks and regards, Scott"
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