Topic: Amp bridging

[curious me]

anyone who knows amp bridging? whats the secret about this? why bridge an amp?

[hattori_hanzo]

hey madam curious,

I answered your question in the other thread. 

[JojoD818]

anyone who knows amp bridging? whats the secret about this? why bridge an amp?

why? because you quadruple the power output. there is no secret about it. 

[ATJr.]

because you quadruple the power output.

if and only if your power supply can handle the added loading, most likely than not, you will end up with twice the power and you convert your amp from stereo to mono.

[bumblebee]

if and only if your power supply can handle the added loading, most likely than not, you will end up with twice the power and you convert your amp from stereo to mono.

Question:

Is bridging different from feeding the main-ins the same input and powering a single speaker (vertical "bi-amping")?

[ATJr.]

this is being done with gainclones, if you want to do this with your stereo amp, it can be done, you have to use  ballast resistors (0.22 - 0.47) at the outputs so that input offset voltages will not be so much of a problem.

but i doubt what you can gain out of this.

[JojoD818]

bridging is very different from vertical bi-amping. unless you reduce your speaker impedance, you'll get nothing out of this.

when you use power resistors to tie the outputs of your amp then that is paralleling and not bi-amping nor bridging.

[NongP]

dont know if this is out of topic pero ask ko na rin 

have this HT set-up and the speakers are

Floorstander - 4 ohms
Center - 6 ohms
Surround - 8 ohms

is there an AV Receiver that can handle different types of impediance?  pede rin po ba convert yun 4 ohms speaker (floorstander) into 8 ohms?

many thanks.

[ATJr.]

dont know if this is out of topic pero ask ko na rin 

have this HT set-up and the speakers are

Floorstander - 4 ohms
Center - 6 ohms
Surround - 8 ohms

is there an AV Receiver that can handle different types of impediance?  pede rin po ba convert yun 4 ohms speaker (floorstander) into 8 ohms?



many thanks.

pwede na rin, kung hindi naman birit ang patugtog mo, no problem. do not concern yourself with speaker impedances too much, just sit down, relax and enjoy the music.

[hattori_hanzo]

Sir

Saan ka naman nakakuha ng 4ohms na floorstander? ano yan DIY? 6 to 8 ohms present sa market pero yung 4 ohms kahit sa professional wala yata nag poproduce nang ganun speakers. unless yun nga DIY. 

[john5479]

Sir

Saan ka naman nakakuha ng 4ohms na floorstander? ano yan DIY? 6 to 8 ohms present sa market pero yung 4 ohms kahit sa professional wala yata nag poproduce nang ganun speakers. unless yun nga DIY. 

not true, dynaudio speakers are rated 4 ohms nominal

[NongP]

Sir

Saan ka naman nakakuha ng 4ohms na floorstander? ano yan DIY? 6 to 8 ohms present sa market pero yung 4 ohms kahit sa professional wala yata nag poproduce nang ganun speakers. unless yun nga DIY.

nabili ko ito sa Glorietta last 2004 (d pa ako member dito) ok naman kasi sa pandinig kaya ayun binili namin agad without bothering to look at the specs (maski naman tignan ko d rin naman maiintindihan eh)    actually kaya namin sya nabili mura sya (12 mos at 0%) 

i'm planning to upgrade the ampli (package with the speakers) into an av receiver.  mga sir any recommendation for an AV Receiver.  thanks!

[hattori_hanzo]

Oo nga sir John "sorry" I stand by corrected! dynaudio are 4ohms. kaya lang in reality mahirap talaga makipag gamble sa 4 ohms speakers, I had bad expirience kasi. a DIY speakers loaded with 2 subs connected in parallel into 4ohms and while in operation using a high current JVC "old school" amp. it put my amp literally in flames  siguro kung Professional amp meron exceptions kasi kahit 2 ohms kayang iload nito. 

Anyways goin back to the "4ohms topic" ang alam ko pag ganyan ang load dapat may dedicated amp ka na kaya ang load na 4 ohms dahil sa totoo lang mainit sa amp ang ganun load dahil masyado mababa ang resistance, so just to be safe better use a 6-8 ohms speakers on any AVReceiver...     

[ATJr.]

8ohm speakers, so called seldom measure 8 ohms dc, i get a reading of 6ohms dc most of the time.

therefore, speaker manufacturers can rate this 6ohm speakers as either 8 or 4ohms and you will never know about it.

[hattori_hanzo]

Sir 2ny,

So that means yung mga specification indicated by the speakers manufacturers that are rated at 8 ohms is just an estimate? so meaning may tolerance? paano yun sir kung halimbawa naka bili ako speakers tapos indicated dito 8ohms then I loaded it sa 8ohms amp. pero sa totoo yung speakers 4ohms pala, ano kaya magiging epecto nito sa amp.? will there occur any damage?

saka sir may concern question tuloy ako, yung HT speakers ko are indicated by the ff;

Fronts : 8ohms 500W
Center : 6ohms 150W
Surrounds : 8ohms 300W

I loaded it sa receiver ko (Yamaha RX-V995) sinet ko sa 6ohms or higher yung impedance switch niya, masisira kaya to sir or any effect or damage?

Sir your opinion is highly appreciated, Thanks in Advance!       

[blackmtx]

If you just want to find out the nominal impedence of the speaker e.g. ist it 4 or 8 ohms then there is a rough & ready way. Just use your multimeter to measure the DC resistance of the voice coil and multiply the answer by 1.3. So if the DC resistance is say 6 ohms then the speaker is nominally 8 ohm impedance.

[ATJr.]

will there occur any damage?

the answer is in your hands how you play your music will determine that.