EQing: Eden CXC300 combo 212 & Avatar B210

[Ian Canefire]

Hi,

Here is the sound of a David Eden combo bass amp with an older model Avatar 210 (not the neodymium) as an extension cabinet.

30 second loop of an original recording on my Roland VS2480. Bass, drums, rhythm guitar, horns. I wasn't sure if I could upload a better quality recording so I recorded with a handheld MP3 recorder in front of the cabinets perched on foam.

I start flat and then start twisting knobs. This is just to give you an idea.

BTW, I removed the High Freq (HF) horn that was attached to the back of the upper placed coaxial speaker in the EDEN combo. So the HF you here is from the avatar. The horn adjustment on the back of the avatar is set at halfway.

cheers,
Ian

 

[BassmanPaul]

Forgive me Ian but I’m not sure what your aim is here. I hear distortion on the bass that would drive me nuts.

 

[Ian Canefire]

The two 12" speakers need to be replaced. I notice a rattle on some notes. Other than that there are things that are rattling in my studio. So you may be hearing a few things.

@BassmanPaul As far as my aim, it is the show the sound of the two cabinets with the eden amp head. I will do another video with the replacement speakers once I make up my mind. I appreciate your response. It made me listen more keenly.


Cheers,
Ian

 

[BassmanPaul]

Make sure you select drivers that have TS parameters suitable for your enclosure(s).

Edit: Reading again your OP, just how did you remove the horn from the coax driver?

 

[Ian Canefire]

Hi Paul,
watch 2:50 in this video I made for how it is connected.

I already spoke to the people at US Speaker, my trusty local eden authorized repair engineer, and have gotten suggestions from people in here.

looks like the old CX1260C (coaxial) was really an Eminence Delta 12B American Standard albeit an older model with less watts (maybe 150w?) but likely the same frequency range and missing the mesh in the magnet hole where the HF tweeter attaches.
The CX1260 I have not yet fingered but I have a few ideas on what it is.

They both are not at the same spec. in the 212 combo cabinet.

Cheers,
Ian

 

[Mystic Michael]

As far as my aim, it is the show the sound of the two amps.

Two amps? I thought you were evaluating two speaker cabs - the Eden and the Avatar - and that the only amp in the picture is in the CXC 300 combo. Did I miss something?

MM

 

[moogieotter]

Ian,

You're cool. Go get u summa dem hawt new emi 12s for your Eden! Keep us posted!

moogs

 

[Ian Canefire]

@Mystic Michael you know what I mean.

Cheers
Ian
Ps i will edit.

 

[BassmanPaul]

What did you do to block the hole through the coax woofer? it must be blocked for the cabinet to perform properly.

 

[bobcruz]

What did you do to block the hole through the coax woofer? it must be blocked for the cabinet to perform properly.

When there's no coaxial tweeter, isn't there usually a piece of foam in the vent to keep debris out of the voice coil? Leaving it unblocked but protected with open cell foam (to allow air to enter and exit when pumped by the cone) might improve cooling of the coil.

 

[Ian Canefire]

Currently there is nothing on the back of the speaker and the hole is unblocked.
@BassmanPaul and @bobcruz I will see how it sounds with foam in the opening today.
I watched the speaker closely and noticed that when the bass frequency knob is turned to 30hz or 40hz and you play a low B note to low E hard the coaxial woofer starts to vibrate and make a sound like "FFFWWWWAA".
Removing the HF tweeter got rid of the POP sounds.
I just need a new woofer that is 16ohm and my dilemna is about taking a chance with a speaker that goes low spec wise (40 or 45hz).
Cheers,
Ian

 

[BassmanPaul]

You NEED to block that hole or damage may well occur.

 

[BassmanPaul]

When there's no coaxial tweeter, isn't there usually a piece of foam in the vent to keep debris out of the voice coil? Leaving it unblocked but protected with open cell foam (to allow air to enter and exit when pumped by the cone) might improve cooling of the coil.

It would basically be like a leak making all sorts of noise.

 

[bobcruz]

It would basically be like a leak making all sorts of noise.

I'm hoping to learn something here, Paul. Assuming the coax looks like this Eminence speaker with the tweeter detached, are you thinking the vent would whistle and you could hear that through the dust cap? Assuming there is no whistling sound (OP didn't mention it), I don't see a place for an air leak to the outside of the cabinet.

 

[BassmanPaul]

If you look at the OP’s video you can clearly see right through the hole in the driver. It’s not like pictured. The driver in your post fires the treble through the dome. Not having the hole blocked puts extra street on the dome leading I feel to eventual failure.

 

[bobcruz]

Hmmm, I saw a dustcap in the video when looking through the vent, and the speaker looks very similar to the Eminence pictured, especially when seen from the front at the end of the video. If in doubt, I think the OP should ask Eminence whether using a coax without the tweeter is destructive to the woofer.