Topic: Behringer A500

[mike c]

qguy, i'm not even gonna quote you anymore.  kahit na puro butas ang mga sagot mo, di ko na rin papatulan yung iba.

di ka talaga nagbabasa?  are you blind?  did you not read my post na wala ng hum yung A500 when I used the TRS input?

di mo rin nabasa na gumawa ako ng A/B test for a couple of people where I did not participate in the conclusions? 

look, if you believe amps sound different, go buy your amps, go spend your money, please.  but stop misinterpreting my posts and applying your twisted logic to my posts. 

you're crazy.  but not because you believe amps sound different, it's because you keep making crazy posts.  this is my last reply to you, because you don't even read my posts.  from now on, feel free to continue ignoring my posts while I start to ignore yours.  goodbye.

[bejiboys]

Thanks.  I seem to have relays lying somewhere at home (with quad-pole, double-throw contacts at the output rated at 3A/220V each with 12V solenoids.  Additive naman yung current capacity kung i-bridge ko yung apat, di ba?.  Then, I have those 12V cellphone charger adapters that I tested could trigger the relay solenoid -will connect to the switched output of the receiver.   Try ko to construct one later this week.   Thanks for the inputs.

[mike c]

looks like you know what you're doing, ako hindi.  I asked my EE friend, and he said, my relay will fry if used for large amperes.  (he's also the guy who told me not to believe the 10A rating)

[qguy]

:'(  seriously it was a fun thread for me, I am always anticipating what your response would be even and to some extent predicting it. Have fun with your gears.

qguy, i'm not even gonna quote you anymore.  kahit na puro butas ang mga sagot mo, di ko na rin papatulan yung iba.

di ka talaga nagbabasa?  are you blind?  did you not read my post na wala ng hum yung A500 when I used the TRS input?

di mo rin nabasa na gumawa ako ng A/B test for a couple of people where I did not participate in the conclusions? 

look, if you believe amps sound different, go buy your amps, go spend your money, please.  but stop misinterpreting my posts and applying your twisted logic to my posts. 

you're crazy.  but not because you believe amps sound different, it's because you keep making crazy posts.  this is my last reply to you, because you don't even read my posts.  from now on, feel free to continue ignoring my posts while I start to ignore yours.  goodbye.

[aHobbit]

Re: Hum on the A500.

beji,

typically such hum can be eliminated by doing chassis-chassis grounding - meaning running wires from a500 chassis to rxv800 chassis - I did this before by putting wire on 1 cover screw of the first gear to the 1 cover screw of the next cover (similar to how a turntable has to be grounded to an amp)

[aHobbit]

Thanks.  I seem to have relays lying somewhere at home (with quad-pole, double-throw contacts at the output rated at 3A/220V each with 12V solenoids.  Additive naman yung current capacity kung i-bridge ko yung apat, di ba?.  Then, I have those 12V cellphone charger adapters that I tested could trigger the relay solenoid -will connect to the switched output of the receiver.   Try ko to construct one later this week.   Thanks for the inputs.

... kung sabay sabay mag-contact yung apat (mechanical kasi loob nyan eh) ... pag nauna yung isa sa apat, mag rush sa kanya yung unang bulto ng 10A ... masunog relay mo!

[bejiboys]

Thanks for the response, Sir aHobbit.

With regard to the hum (or is it noise).  I will try your suggestion.  But what bothers me a bit is if I enable "source direct" in the RXV800, the hum/noise is lost.  Could it be that the DSP's of the AVR are the culprit to this?  Anyway, this is really no big deal as it is hardly noticed at normal - loud listening levels.  It is only noticeable upon cranking the gain of the A500 and the volume control of the AVR all the way to max, that is - without any signal coming from  the audio source.

Yung sa relays, would like to ask if the surge on the A500 reach 10A?  I was hoping that the current would not go beyond 3A and kung me delay eh almost instantaneous naman hahabol yung other contacts.  Tinatamad na kasi ako pumunta sa Deeco to look for higher current rating relays.  Will give you feedback once I get this done this weekend.

[rascal101]

looks like you know what you're doing, ako hindi.  I asked my EE friend, and he said, my relay will fry if used for large amperes.  (he's also the guy who told me not to believe the 10A rating)

As long as you don't exceed rating of the relay it should be fine. From experience and industry practice, an 80% derating is suggested. For example if your relay is rated as 10A, a measured current of 8A or below is good. Whereas if it exceeds 8A this will shorten life of the relay.

[mike c]

rascal, buti ka pa mas optimistic, yung EE friend ko sabi 50%.  and then someone also said na consumable ang relays, kaya I bought 10 of the omron relays when my brother was in the US.

[rascal101]

Ang 50% derating sa pagkatanda ko pang industrial, medical or telecom application. Pero normally sa commercial 80% derating sinusunod.

[aHobbit]

Yung sa relays, would like to ask if the surge on the A500 reach 10A?  I was hoping that the current would not go beyond 3A and kung me delay eh almost instantaneous naman hahabol yung other contacts.  Tinatamad na kasi ako pumunta sa Deeco to look for higher current rating relays.  Will give you feedback once I get this done this weekend.

You got a point there ... typically, based on my experience, the only component in the amplifier that will have the rush of current is the capacitor (charging). But since it is not that big, I dont think it will exceed the 3A.

Looks like the hum is not really an issue in your case - it is there so low at the pre-out of the RX-V800 and you provide a gain of about 40db yata - talagang marinig mo na yan at the extreme volume of a500!

[ATJr.]

Since both my amp and my AVR don't have remote triggering capabilities, can I make a DIY power strip for the amps using 5A relays/amp triggered by the switched AC output from the AVR?  Wala bang "popping-sound" na maririnig if I set the gains of the amp to the desired levels prior to power up?

yes, you can do that, i would choose a 10amp relay, price will not be that far.....as for the volume pre set, i would not do that, always set the volume to minimum, then adjust it when the amps have stabilised in about a few minutes...

[bejiboys]

Thank you again for the inputs.

Sir TonyT, question po re: volume preset.  When you mentioned "volume", do you mean the volume of the AVR, the gain control of the amp, or both? 

For amps with preset gain settings and with remote power on capabilities, meron po bang circuitry yun that gradually increases the gain control from minimum to max upon application of remote power to the amp?

Sorry po for asking too many questions.  Ito po ang downside of using the a500's.  Everytime manonood ako ng dvd, I need to walk over to the amps, turn on the power and the 2 gain knobs for both amps.  Nakakatamad.

[ATJr.]

 power amp only, this is to protect your power amp, i am not aware of any such circuit that gradualy turns up the volume on power up.

[rascal101]

Thank you again for the inputs.

Sir TonyT, question po re: volume preset.  When you mentioned "volume", do you mean the volume of the AVR, the gain control of the amp, or both? 

For amps with preset gain settings and with remote power on capabilities, meron po bang circuitry yun that gradually increases the gain control from minimum to max upon application of remote power to the amp?

Sorry po for asking too many questions.  Ito po ang downside of using the a500's.  Everytime manonood ako ng dvd, I need to walk over to the amps, turn on the power and the 2 gain knobs for both amps.  Nakakatamad.

Exercise is good for the heart 

[mike c]

why do you have the a500's gain knobs at max?  mine is at half.

as the name suggests, after the half setting, you could be adding gain to the noise ... it is better to increase the receiver volume and add signal, than boost a weak signal using the a500.

[pabili]

I agree ... halfway the volume should be the norm (or max) that you should go on the A500 ... if for home level use only, going less than halfway will be better, so as not to amplify noise most of your listening time.

[ches]

Hi Im still a newbie, i like to know if you can connect directly a cd player to the A500 directly or you need a pre amp?

-Ches

[mike c]

in theory puwede, but you'll have to use BOTH the left and right gain controls as volume control (dapat sabay)

[ches]

Thanks mike, bought yesterday the a500 at raon P12,100. connected it with an old pioneer 6 cd changer sounds good even on bose acoustimass 7[. my observation lang the right channel is weaker at same level kaya mas higher yung knob sa right side ng konte, and the tlr input is less sensitive kailangan mas higher volume, no humming sound naman sa rca input even naka max.

[yygoob]

where in raon mo binili and may warranty ba thanks

[MAtZTER]

first, find yourself a 120wpc 14 thousand peso Rotel … and I will tell you the answer to that question.

Survey lang po:

Anybody interested if we bring in a BADA 2x130w @ 8ohm (190w @ 4ohms, 20-20) power amp at the same price? (12-14k). In sleek black casing w/ detachable power cord, torroidal transformers.


File Photo only, ordered unit in black (want tagalog writings?  Joke)

Bada engineer says its got all the same specs as the Rotel 1070 except for the damping factor, w/c would drive the price too high if modified.

I am using a 95w (190@4ohm) integrated amp from the same brand & it can drive my Dynaudio FS w/ ease. Subjectively compared to my Rotel 985's, I consider it a bit more musical (less harsh), but I duno if its because of the pre amp difference (I use a different tube preamp for the Rotels).

I will be ordering some but very conservatively cuz some stores are interested, wala daw kasi nagbebenta ng power amps at this price. Checking for interest here cuz baka naman sobra konti order ko sakaling merong interested. ETA 2 months

[john5479]

^ Im interested, I hope it handles 4ohm speakers with ribbon tweeters well

[yygoob]

with is better behringer or the bada? same price Kasi eh

[av_phile1]

The Behringer brand is a well-respected brand among professional and studio/concert grade gear users.  The particular model also got rave reviews on the net.  Its specifications are at par with Rotel, Arcam and even Bryston amps.  I 'm not familiar with the Bada brand. They're both China-made, though the Behringer has its pedigree in Germany in 1989. 

The looks of the Bada amp shown in this thread is rather nice though, compared with the A500 which I don't find attractive.  You can always audition the two to check which one is preferred by yours ears, hopefully on the same speaker set and source/player. 

[MAtZTER]

I agree with Sir AVphile. Audition is still the key. We all have different ears & gears (synergy), and only you can tell w/c is better.

To familiarize with the Bada brand, Bada is a 25 year old China brand that recently opened its doors for exporting its "no compromise" quality products. As an example, their tank-like tube CDP that me & my audiophile friends opened used the same chips (all top bur brown) that was used on the flagship Rotel CDp RCD1070. So if the Bada engineer says this power amp has the same specs of the Rotel 1070, I guess I would believe him. He was honest enough to point out the lower damping factor anyway.

Like I mentioned, I am using the 90w integrated amp version & its comparable in quality to my previous 100w rotel power amp driving 4ohm Dynaudio floorstanders. Take note its been established that Dynaudio does not mix well w/ cheap electronics & the lowest priced amps I heard that powered Dynes well were at 45-60k.

But I understand since this brand is not popular here yet (popular in HK & Australia sabi ni SGT), people would want an audition. Maybe the best I can do is to leave these 2 amps (the Bada & Rotel) at a shop for audition, but for a limited time only since its my beeeloved audio setup! kawawa naman ako pag mawalan ng setup for a week baka manginig ako (Adik  ). LOL

[mike c]

bakit ngayon ka lang matz!?  parang kakanta na ako a.  ang pangit naman kasi ng behringer, buti na lang sa HT ko ginagamit, walang ilaw.

meron bang 12v trigger yung bada, or auto sense?
na bri-bridge ba siya?

[MAtZTER]

Haha! Natawa ako doon ah.

Walang 12v trigger, its just a plain & simple power amp. But I am asking the engineer about the bridging now. Basta we could gather 10 buyers we could even order dual mono or even up to 5 channel versions.   

SORRY if OT, dito na lang post if interested... http://pinoydvd.com/board/index.php?topic=68465.0