Hi ,
Can i use Balanced output from my preamplifier to get splitted RCA signal from hot/cold and neutral pins to drive L+R channel of an amplifier and take output from hot pins of amplifier output thus making a bridge and hence converting a stereo amplifier into monoural bridged amplifier ?
Just wanted to know before making any go ahead....would simply cut the female XLR connector and attatch 2 RCAs on each output for my twin Yamaha B-5 amplifier.....want to have 2 monoblocks.......700W/channel into 8 ohs, and 60 W Class A per amp in Yamaha B-4 amp?
Please suggest
Can i use Balanced output from my preamplifier to get splitted RCA signal from hot/cold and neutral pins to drive L+R channel of an amplifier and take output from hot pins of amplifier output thus making a bridge and hence converting a stereo amplifier into monoural bridged amplifier ?
Just wanted to know before making any go ahead....would simply cut the female XLR connector and attatch 2 RCAs on each output for my twin Yamaha B-5 amplifier.....want to have 2 monoblocks.......700W/channel into 8 ohs, and 60 W Class A per amp in Yamaha B-4 amp?
Please suggest
Your balanced XLR has a GROUND and two outputs wich are in opposed
phase , so you just have to use Ground/+ ouput for a RCA connector
and Ground/-output for the second one and plug onto right and left channel.
By convention the right channel hot pin output will be used as +
and the left channel HOT PIN output as -/VIRTUAL GROUND to connect the speaker.
phase , so you just have to use Ground/+ ouput for a RCA connector
and Ground/-output for the second one and plug onto right and left channel.
By convention the right channel hot pin output will be used as +
and the left channel HOT PIN output as -/VIRTUAL GROUND to connect the speaker.
No.
Convert the amplifier to accept the balanced input and use the two signals from the input circuit to feed the two channels of the bridged amplifier.
Convert the amplifier to accept the balanced input and use the two signals from the input circuit to feed the two channels of the bridged amplifier.
Wahab,
PIN1 of the output is not a signal reference voltage. PIN1 is connected directly to chassis and the two signal wires PIN2 & PIN3 do not necessarily reference to the chassis.
PIN1 of the output is not a signal reference voltage. PIN1 is connected directly to chassis and the two signal wires PIN2 & PIN3 do not necessarily reference to the chassis.
i intend to use this Behringer DI box for unbalanced to balanced convertor:with two unbalanced inputs i can have upto 8 outputs, high input impedance of 1Mohm, 600 ohm output impedance, plus it has a ground lift switch.
But what about the conversion Andrew T, can i do it this way , i cannot understand what is being said here. my apologies. whats the difference in splitting the Balanced output from DI800 with ground lifted run each channel with hot/cold pin 2/3 and ground pin and take outputs from both hot terminals of speaker, in this way i would not have to open and modify amplifier ?
Is it doable?
But what about the conversion Andrew T, can i do it this way , i cannot understand what is being said here. my apologies. whats the difference in splitting the Balanced output from DI800 with ground lifted run each channel with hot/cold pin 2/3 and ground pin and take outputs from both hot terminals of speaker, in this way i would not have to open and modify amplifier ?
Is it doable?
As pointed by Zenmod , if it s not a mock XLR , it s possible...
The signals are referenced to ground not to the chassis if it s
a safe XLR.
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BTW i also have KRELL KRC_HR preamplifer with a pair of XLR outputs and i assume they should be symmetrical as i am driving KRELL FPB 600 amplifier with XLR cables and ground pin removed for fully balanced operation
This is exactly CORRECT !
In as much as Pin #1 of an XLR connect is NOT part of the audio circuit, it should not be used as a reference or as part of the audio circuit.
considering that most of unbalanced to balanced and VV conversion is made electronically , it's safe to presume that any of these conversion circuits can't operate without gnd as reference ;
so - yes .
simple test , without too much of useless brainwashing - feed it with some signal , then measure both outputs ( meaning both pins 2 and 3 ) against gnd (pin 1 ) ; if you have same reading , circ is certainly symmetrical ;
observe difference between terms balanced and symmetrical
symmetrical is balanced which is referenced to some potential , usually GND
(just) balanced doesn't need to be referenced - it can consist just of two leads/points
example - if you have xformer as part of a circuit (in or out , whatever ) , winding is symmetric balanced if center tap is connected to gnd
if CT isn't connected to GND , it's (just) balanced
so the ground of RC cable would be the XLR ground/connector chasis ground and NOT the pin 1 ????
Are you directing your question at my post or another one?
Pin 1 of the XLR is supposed to be connected to chassis ground right there at the jack.
ok. got it. just curious would we call it bridged Or Fully balanced?
does it has any sonic benefit or noise reduction ?
does it has any sonic benefit or noise reduction ?
Originally, the use of balanced circuits in audio/telephone was for the cabling only. A twisted pair cable with balanced (equal + and - signals) rejects noise. This is useful for long cable runs. For home use, the benefits are debatable in my opinion. If you live near a radio station where there's a lot of RFI, then balanced cabling at home makes sense to me.
dirkwright the first objective is to have two monoblocks from two, 2CH amplifiers, each is rated 350W into 4 ohm load per channel , so i expect 700W into 8 ohm per monoblock, a great deal of headroom, excellent channel separation, greater current carrying capacity per channel to handle transients and using less stressing of each amplifier at lower/moderate listening levels and therefore less THD. just wanted to check that if its doable and has anyone done it before .regards
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