UPS or Stabilizer

[maharajg]

Hi Guys,

I'm planning for an inverter for my house, basically for lights and fans.

I have the below HT setup, Sony 46" TV, Center - Polk Cs20, Surrond - Polk Tsi200, Denon Avr x2000, Subwoofer Polk DSWpro550wi, Front - Polk 400s.

If i buy an online APC 2 KVa Ups will it be sufficient for both these purpose or should i buy a stabiliser for the AV and Inverter for fans and Lights. Spoke to APC folks they seem to suggest that i can have ups for both. Please advice.

Regards
Srini

 

[karthi1000]

kindly calculate the total wattage of all the load likely to be connected to that online ups ..........for 2kva u can safely give 1300 watts... back up time depends on ur battery capacity
i think u cant connect ur avr to that along with other load
2kva for avr alone will do

 

[maharajg]

Noted. Thanks Karthi. Load comes approx. to 1.5 Kva.

 

[sound_cycle]

I have the below HT setup, Sony 46" TV, Center - Polk Cs20, Surrond - Polk Tsi200, Denon Avr x2000, Subwoofer Polk DSWpro550wi, Front - Polk 400s.

If i buy an online APC 2 KVa Ups will it be sufficient

(emphasis added)

I guess it is the "if it's sine you'll be fine" thing.

My amp was stickered with dire warnings of voiding warranty if used with inverter power. there are many threads on this issue on hfv for instance http://www.hifivision.com/av-lounge...-if-used-ups-inverter-power-2.html#post599021

ciao
gr

 

[yugaaa]

The UPS has to be sine .. and most of them are really costly if you intend to use with AVR .

For the AVR alone I would suggest a stabilizer

 

[arorarah]

Agreed. The UPS has to be pure sine wave. Just check sometimes even square wave UPSs claim to be sine.

Stay away from stabilizers for sensitive electronics equipment like amps, LCD / LED etc. They would do more harm than good because of constant switching in case of even moderate voltage fluctuations.

 

[SuhasG]

Stay away from stabilizers for sensitive electronics equipment like amps, LCD / LED etc. They would do more harm than good because of constant switching in case of even moderate voltage fluctuations.

I don't agree with this. I am using Krykard 3 KVA Servo Stabilizer for last 8 years without any problems. My systems consists of Cadence VA-1 Valve amp , Unison Research Unico Hybrid amp, Cadence Anina Electrostat speakers, Audio Note UK CDP, Perpetual Technology DAC and Gerrand TT , Pansanoic 42 inch Plasma Panel and SONY HTiB - all these expensive gears are well protected by this stabilizer. And there is no drop in Sound Quality. (of course not all gears are 'ON' at a time!)

UPS is damn expensive, I am not talking about al-chepo square wave / quasi square wave type, but real Line interactive, Pure sine wave variety.
For Stabilizer, Servo controlled is the way to go , don't even look at Relay based or solid state.

I would recommend KrayKard , Vertex , Aplab. Mr Murthy from Bangalore makes excellent customized (audiophile grade !) servo stabilizers (expensive though) .

One has to be pretty careful while selecting UPS/ Stabilizer especially its current rating. Most electronic products (such an amp) state only the steady state current rating but that is not enough. One need to account for In rush current requirement. In-Rush current is the current drawn by the equipment when it is made ON , this subsides after some time (say couple of seconds or less) and equipment starts drawing its normal rate steady state current. , this In-Rush current in most cases almost 1.5 to 2 times the rated (steady State) current rating.

During playing very complex music or bass heavy music, most amplifiers typically draw much higher current than the rated one (of course this is temporary phenomenon) one has to account for this also.

Then one has to think of some reserve capacity for any future expansion / upgrades.

 

[ravivarakala]

Hi Gyzz Need suggestion

newly setting up home theater

equipment : Benq W1070

AVR : Sony STR DN 840

Speakers : Polk SR and Central

AVR is 120V 60HZ - i have read posts here some suggest Isolation and some say Auto stepdown .. please suggest ? bit confused??:sad:

 

[SuhasG]

AVR is 120V 60HZ - i have read posts here some suggest Isolation and some say Auto step down .. please suggest ? bit confused??:sad:

Isolation (transformer) just isolates power line, nothing more. IT won't affect / change the power supply (voltage and/or frequency) , for system mention , an isolation transformer could be rather over kill.

For 120V/ 60 Hz operation, go for properly designed step down transformer. Do use the ready made converter as those are designed for Hair Dryers, electric shavers etc.

Even after using a step down transformer out is is still 120 V - 50 Hz, but don't worry that 120 V / 60 Hz gear will work flawlessly on 120 V / 50 Hz. Frequency 50Hz or 60Hz has nothing to do with audio quality. In some gears frequency is used as a clock tick for timing purpose (on board real time clock) but now a days no body uses mains frequency for timing , there are plenty of cheap electronics chips (with 32KHz crystal) available to keep time.

Go for properly rated Servo stabilizer. If every thing run on 120 V, better ask the Servo manufacturer to tune the servo for 120V output. Else get step down transformer ( You must get something with CRGO stamping, double insulation and earth tap!) and connect that to a Servo with 230V output.

Hope this helps

 

[SuhasG]

There was a typo in my earlier post:

Do use the ready made converter as those are designed for Hair Dryers, electric shavers etc

Please read it as:

Do not use the ready made converter as those are designed for Hair Dryers, electric shavers etc