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General Audio Discussion Thread

  • Vendetta, ganito ba yung sinasabi mo?

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  • Opo, sir. ^_^
  • goodeve po mga sirs . total noob here in amplifiers and speakers. Anu pong maisusugest ninyo na amplifier to power up my JVC 100W x 2 stereo speakers? sira na po kasi yung JVC component namin, papakinabangan ko nlng tong speakers.

    Salamat po.
  • Anu pong maisusugest ninyo na amplifier to power up my JVC 100W x 2 stereo speakers? sira na po kasi yung JVC component namin, papakinabangan ko nlng tong speakers


    ito pwede na sir sa inyong speaker Konzert AV-301

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    or Sakura Brand Marami pagpipilian

    <click here for link>

    -- edited by marcosky11 on Mar 25 2015, 10:38 PM
  • Ako, I don't use the amp's power swtich to turn off power anymore. I rely on a general power strip with individual switches and cut off all power from there. Doon rin ako nag-switch on muli. Especially, now when power switches seem to break down lalo na yun rocker type switches. It's easier to replace power strip switches than what came with those power amps or other equipment.

    Sige sir I'll try this. :)

    Goal ko pa rin is pamodify to fix the turn-off pop sound. Pero may 1 year warranty pa kasi sayang naman. Kung papalitan ko kaya yung amp?

    -- edited by songerph on Mar 27 2015, 11:44 AM
  • Goal ko pa rin is pamodify to fix the turn-off pop sound.


    Does the popping sound comes at the same time when powering off or a decaying popping sound?

    Popping at the same time power off - most likely the problem is arcing power switch. The modification for this is to put 0.1 micro farad AC capacitor 630v like those ones used on electric fan. Two of these needed if the power switch is double pole.

    Decaying popping sound is caused by the discharge of the psu filter capacitors specially if they are the big values. Not sure can be done with this.

    As Sir V said, using switched power strip, you can try turning off from it if you have one to isolate if there is arcing on the amp power switch itself.
  • Maraming salamat Sir Marcosky11
  • Popping at the same time power off - most likely the problem is arcing power switch. The modification for this is to put 0.1 micro farad AC capacitor 630v like those ones used on electric fan. Two of these needed if the power switch is double pole.

    Thanks sir. I'll take note of this.

    The switched power strip workaround did the trick! damn amp switch. Ayus! :)))
  • @songerph

    The recommendation/modification I mentioned is only beneficial if Amp Power Switch replacement is not available. There is one disadvantage putting capacitor across the switch because a very small amount of current is still flowing even if the power switch is OFF. The capacitor is still passing current from the mains.

    The switched power strip workaround did the trick! damn amp switch. Ayus


    If you are happy with that then there is no need to bring the amp for service :)
  • I see, I see. The power strip workaround sure is convenient. I'll stick around with this at the moment. haha. Thanks a lot masters!
  • To anybody,

    What brand of amplifier preferable commercial that have a source both 110/220 volt, and can be used for videoke?

    Tia.
  • Very hard to find now multivoltage power amp because most of the good brands have their own local distributors already. If you find one sure the price is high.

    The best to do is just buy a step up-step down transformer/converter both ways. This way you can buy cheaper amp and you can use anywhere since you can select the input voltage and gives you still dual output.

    Step Up/Down transformer converts 220-240 volts down to 110-120 Volts or 110-120 volts up to 220-240 volts.
    Simultaneous 3-mode Output: 5V (USB) / 120V (Standard US outlet) / 220V (Universal outlet)
    Four input voltages selectable: 110V/120V/220V/240V


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  • Ilan amps kaya ang kaya ibigay ng USB 5V outlet niyan? Most adaptors kasi mababa lang and in the milli-amp range only. mataas na nga commonly ang 1 amp. 2 amp ones are hard to come by and if ever eh costs too much.
  • Although the current is not specified, I would guess it is 0.5A since it states that it is a Standard USB.

    Taken from USB specification standards:

    there are three kinds of USB port dictated by the current specs:
    a standard downstream port - 0.5A (USB1 & 2)
    a charging downstream port - 1.5A (USB3)
    a dedicated charging port - 1.5A (USB3)

    The very new USB3.1 - 1.5A, 3A

    You can find other current ratings but they are proprietary like Apple etc.

    -- edited by fortoz on Apr 04 2015, 04:01 PM
  • San po ba makabibili ng XLR cable? Mga magkano po? Need lang sa mic. Thanks.
  • Mga sirs can you give any advice on advantages/disadvantages of digital amplifier. Meron n b nito sa raon for use sa videoke machine. What brand would you recommend. Mas mahal b ito s regular analog amplifier. Ty po
  • Digital Amplifiers better known as Class D Amps are not widely available yet for home use. You will find them as branded ones used in reinforcement systems. One company which implements this design is the Behringer. I've been using my Behringer PMP6000 and Behringer B1800D-Pro for a couple of years now and have no problem so far.

    Advantage:
    Lightweight - no big heatsink because it doesn't get hot too much. Fan system helps for cooling.
    No bulky transformer because the PSU is switchmode type.
    Higher models can have output impedance as low as 2 ohms.

    Disadvantage:
    More expensive not by the parts but due to design.
    Availability is limited since appliance stores don't cater them.
    When it fails and out of warranty is harder to fix since manufacturer doesn't release schematics (design protection).

    There are other companies making them as hybrid to make it cheaper but why you want it that way if you want to go digital :)
  • may ka members po ba tayo dito na expert na gumagawa ng mga Sub Box gaya nito??

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    pagawa sana ako eh hehe
  • I Believe those ported sub design came from MarcoPilyo of pinoyD*D. those subs can compete with branded and pricey subs out there and it can definitely give you kick.
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  • came from MarcoPilyo
    yes yung owner nyang pic ay taga pinoyDVD rin hehe kay marcopilyo din pinagawa malayo lang sa location ko :(
  • sir Vendetta

    Ako, I don't use the amp's power swtich to turn off power anymore. I rely on a general power strip with individual switches and cut off all power from there. Doon rin ako nag-switch on muli. Especially, now when power switches seem to break down lalo na yun rocker type switches. It's easier to replace power strip switches than what came with those power amps or other equipment.


    regarding in sa power strip gumagamit din kasi ako nyan para di ko na makalimutan na lagi naka on ang sub dahil may light indicator na sa saksakan

    ask ko lang po ok lng po ba yan na yung amp equalizer at mixer naka on lahat sa switch at sa power strip n lng patayin at buksan? para hindi na isa isa ko pa ini o on parati ang mga power swith ng amp> eq > mixer > sub?


    -- edited by marcosky11 on Apr 23 2015, 10:09 PM

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