• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

No bass

J

joebeadg

Active Member
So I’m running Klipsch epic cf-4 I think there called and also chorus 2’s powered by an adcom gfa555 and adcom gfp915 preamp
I toggle the speakers back and forth with an adcom speaker selector
But I’m noticing I don’t have much bass
Now I’m feeding music in from YouTube on my tv.
I mean WTF!
I should have alot of bass
Any ideas y I don’t?
 
Register to hide this ad
joebeadg said:
So I’m running Klipsch epic cf-4 I think there called and also chorus 2’s powered by an adcom gfa555 and adcom gfp915 preamp
I toggle the speakers back and forth with an adcom speaker selector
But I’m noticing I don’t have much bass
Now I’m feeding music in from YouTube on my tv.
I mean WTF!
I should have alot of bass
Any ideas y I don’t?
Click to expand...
2 sets of stereo speakers hooked up simultaneously?
 
No bass?

You had me at Klipsch :)

opnly bafld said:
Speakers wired out of phase?
Click to expand...

Agree with @opnly bafld -- most likely the speakers wired are out of phase, causing the woofers to move in opposite directions, cancelling out the low bass frequencies.

theophile said:
2 sets of stereo speakers hooked up simultaneously?
Click to expand...

Also agree with the above -- two sets of speakers can also cancel out frequencies for the same reason -- even if the individual pairs are wired with proper phase.
 
joebeadg said:
I’m sure there not out of phase but I will check that, ty
U had me at Klipsch? I thought they were known for great bass?
Click to expand...

Sorry, I couldn’t help myself - Klipsch is generally known for not going super deep - but you should get good bass from those 2 models.

Given that you don’t have bass in either pair, I suspect the phase is switched on the wires going to the speaker switch. If the wires look like they are in phase, maybe take the speaker switch out of the circuit as a test to see if that fixes it.

Unless there is a problem with the amp (which would also affect both speakers), it seems like it has to be speaker phase (or a problem with the switch box).
 
Listening to something in mono is also a workable test. If the speakers are properly phased the sound comes from between them. Out of phase and the sound comes from the corners of the room.
 
I have Stereophile's Test CD 2 and play the first two tracks every time I hook up something or rearrange equipment.

Tracks:
[1] Channel Identification 0:37
[2] Channel Phasing 0:46
 
If it was just one pair of speakers, it could be that work had been done on the internals in the past and a woofer was accidentally wired out of phase, so you would have the right wiring externally, but the speaker would still be out of phase (both with the other speaker, and maybe also out of phase with other drivers in that speaker).

However, the fact that it happens on two different pairs of speakers makes a flawed repair an unlikely cause.

opnly bafld said:
I have Stereophile's Test CD 2 and play the first two tracks every time I hook up something or rearrange equipment.

Tracks:
[1] Channel Identification 0:37
[2] Channel Phasing 0:46
Click to expand...

I have the original Stereophile Test CD (the one with the tan cover) -- I need to dig this up and see if it has the phase test. How does the channel phasing test work? Can you confirm phasing by ear, or do you use a sound level meter?
 
sound hound said:
Do you have another program source you can try? At least traditionally, television is not known for a wide frequency range.
Click to expand...
Most commercial FM radio stations these days too. My DCM TF500's rock when I'm listening to a record or CD. But with TV or FM radio they sound pretty thin, except on the college stations that don't compress the crap out of everything.
 
My speaker selector works good, but it takes work, since I unhook one pair and hook up another pair (at times involves moving the speakers also).
 
opnly bafld said:
@peterp1

The way it is done on this CD 2 it is easy for me to tell just by listening.

I would call my original Test CD orange or yellow. :dunno:
Click to expand...

I both agree with you regarding color ...

s-l960.png


And disagree with you :) ...

s-l1600.jpg


I don't know if those are picture/lighting differences, or if they changed cover colors at some point, or it just faded over time. It's been a LONG time (decades) since I've seen my CD, but I have "tan" etched in my brain.

The good news is that the original disc also has the phasing test (with Ralph the Christmas Dog, apparently). Both the "tan" and "orange" are marked STPH 002-2 on back, so it was a cosmetic change if there was a change

s-l1600.jpg
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom