Question about VP180 crossover

Posted by: DougieBaby

Question about VP180 crossover - 09/27/13 11:02 PM

I was listening to a Spyro Gyra SACD with a 5.1 mix the other day. Great music, btw, for demoing speakers and audio equipment. Anyhow in one song there is a long bass guitar solo that's mixed entirely in the center channel. I was paying close attention to the drivers in my VP180 during the bass solo, and I noticed during the lowest pitched notes of the solo, that the midrange drivers were moving quite a lot, with large extension, along with the two woofers. I would have thought that the crossover electronics in the VP180 should send the low freq signals only to the woofers, but it seems the mid range drivers are also getting low freq signals to cause them to move with high extension. Is it possible he crossover in my Center is defective or is this normal operation?

-Dougie
Posted by: tomtuttle

Re: Question about VP180 crossover - 09/27/13 11:21 PM

How did it sound?
Posted by: DougieBaby

Re: Question about VP180 crossover - 09/27/13 11:49 PM

It sounded great, I suppose that is what matters. However sometimes while watching movies I feel something is missing in center dialog. But that might just be my hearing lol.
Posted by: SirQuack

Re: Question about VP180 crossover - 09/28/13 12:34 AM

It could be how you have configured or setup your AVR in regards to distance, delay, crossover, etc.
Posted by: MarkSJohnson

Re: Question about VP180 crossover - 09/28/13 05:14 AM

Even in a "bass" solo, much (if not most) of what you hear are upper harmonics. I'd say that what you're describing is perfectly normal.
Posted by: casey01

Re: Question about VP180 crossover - 09/28/13 11:07 AM

Originally Posted By: DougieBaby
I was listening to a Spyro Gyra SACD with a 5.1 mix the other day. Great music, btw, for demoing speakers and audio equipment. Anyhow in one song there is a long bass guitar solo that's mixed entirely in the center channel. I was paying close attention to the drivers in my VP180 during the bass solo, and I noticed during the lowest pitched notes of the solo, that the midrange drivers were moving quite a lot, with large extension, along with the two woofers. I would have thought that the crossover electronics in the VP180 should send the low freq signals only to the woofers, but it seems the mid range drivers are also getting low freq signals to cause them to move with high extension. Is it possible he crossover in my Center is defective or is this normal operation?

-Dougie


If the sound is good and it is not distorting then, no problem. Like the others have already mentioned, it depends where you have done your speaker settings on your AVR. Electric bass doesn't go much below 60HZ even at its lowest register, a frequency range the VP180 is more than capable of handling. Its pretty common knowledge, but even if you have your crossover for the center channel set at 60/80HZ, its a gradual roll-off not a sudden elimination of frequencies below the set level so you will still hear frequencies below that level. If you have the center set at full-range, then that's OK too.

That is the great advantage of full-range center channel speakers, you get significantly more flexibility in your set-up and it sounds better too with a much smoother blend with everything else.
Posted by: exlabdriver

Re: Question about VP180 crossover - 09/28/13 04:24 PM

A 5-String Bass reaches 30 Hz with the B0 note on the lowest open string...

TAM
Posted by: JohnK

Re: Question about VP180 crossover - 09/28/13 10:01 PM

Dougie, Mark is correct; the fundamental low bass note at say 40 or 50Hz is just a small part of the total sound that the bass guitar produced at that instant. The harmonics of a 50Hz fundamental at 100Hz, 150Hz, 200Hz etc. are what produce the actual tone that we hear. Hearing only the 50Hz fundamental(e.g., by disconnecting the wires from the speakers and listening to the sub alone)would be anything but "musical". The harmonics are reproduced in large part by the mid-range drivers and they certainly have to be moving even on a "bass" note.