Question about Y Splitter

[fabiocz]

My current scenario:
Denon 4500 h, it has 2 independent sub outputs
Output A = 1 SVS SB 3000 (-9db on SVS app and - 8.5 in receiver)
Output B = 1 SVS SB 3000 (-9db on SVS app and - 8.5 in receiver)

If I had 4 units, I would use 2 Y splitter directly on each output of the receiver, transforming 2 outputs into 4, and I would have the 4 subs in a single LFE cable in these 4 connections, I would keep the same gains in each pair of subs, because in my case, they would all be exactly the same distances.

The question is:
What if I had 3 units of the SVS 3000, how to match the gain between output A and output B?
Output A = 1 SVS SB 3000 (-9db on SVS app and - 8.5 in receiver)
Output B = Y Splitter with 2 SVS SB 3000 (-XX? On SVS app and -XX? In receiver)

 

[WaynePflughaupt]

The proper way to gain match would be to use a low-frequency noise source and SPL meter.

Regards,
Wayne A. Pflughaupt

 

[Speedskater]

Some cell phones have SPL meter apps.
While they might not be as accurate as a calibrated SPL meter or cal microphone, they will well for this measurement.

 

[fabiocz]

The proper way to gain match would be to use a low-frequency noise source and SPL meter.

Regards,
Wayne A. Pflughaupt

I was in doubt because I read in other forums that the use of Y Splitter the gain is changed, some spoke in 3db, others 6db, I am not sure what really changes.

I have rew and umik1, so I just measure with the microphone close on the sub, output A = 1 sub, and after output B = 2 Subs and match output B with output A, is that it?

 

[lovinthehd]

I was in doubt because I read in other forums that the use of Y Splitter the gain is changed, some speak in 3db, others 6db, I am not sure what really changes.

That's referring to the use of both rca inputs on a sub....

 

[Speedskater]

I was in doubt because I read in other forums that the use of Y Splitter the gain is changed, some spoke in 3db, others 6db, I am not sure what really changes.

They are doing something other than splitting one output into two inputs.

 

[Speedskater]

I have rew and umik1, so I just measure with the microphone close on the sub, output A = 1 sub, and after output B = 2 Subs and match output B with output A, is that it?

Place the microphone at the listener position.

 

[lovinthehd]

They are doing something other than splitting one output into two inputs.

It's a slight gain advantage when using both inputs, no?

 

[Speedskater]

It's a slight gain advantage when using both inputs, no?

I think that I am totally confused as to what is going on.
One output can be split to the inputs of two separate mono amps.
One output can not be split to two inputs of the same amp.

 

[lovinthehd]

I think that I am totally confused as to what is going on.
One output can be split to the inputs of two separate mono amps.
One output can not be split to two inputs of the same amp.

I was referring to what the OP had read about the gain advantage using a splitter with a sub....

 

[Speedskater]

Going back to the original post:
One output thru a 'wye' to two sub-amps.
One output to one sub-amp.
If those outputs are RCA, then all three inputs will be equal.

 

[fabiocz]

So ... im my example, using the splitter... i don't will have gain in Out B... the out A and B will have the same gain, correct ?