Studio Monitor Issues

[FoulCore]

Hey everyone. I'm new here, so forgive me if I'm making new unnecessary threads.

I have a fairly large home studio, and really am having very little trouble with anything, except this:

I have passive studio monitors which need external power from an amp, and the amp and the monitors don't seem to be getting along. The speakers are loud and crisp, with nice flat response across the whole spectrum. They sound great, but occasionally (and it's happening a lot more frequently lately) they will intermittently cut in and out, as if the wiring is bad. I rewire them with new audio cable of the proper gauge, and it works fine for perhaps a day or two, then the process begins anew.

Here's what I have:

The old Samson Servo 120
A pair of Celestion SL6 (8 ohms)
A pair of JBL G500s (6 ohms)
I'm using basic gold wiring to run all 4 speakers from the Samson's 2 channels.

What do I need to do to fix this? (budget isn't really too much of an issue.)
I figure it has something to do with the ohmage of the speakers being different.

And on this same note, is there a way I can add a sub to my setup, and if so, what would I need to do, and what is a good sub to add?

Thank you all.

[KRStudio]

I would venture to say it's the old Samson. 8 and 6 ohms should not be an issue. Take the cover off and blow it out real good. If it still happens buy a new amp. It's not the speakers if it happens with both pair. It's not the cables, they got replaced. It's the amp.

[KRStudio]

I just re-read. DO NOT run all 4 at the same time. One pair or the other. If running just one pair does not shut it down you are fine. Check the amp and see if it's a 8 ohm per side or 4 ohms.

[AlexK]

tutt Never run two pairs of speakers at the same time for monitoring, that's just an acoustic/sonic disaster waiting to happen.

Your speakers will be presenting a ~3.4Ω impedance to the amplifier, which is designed to only run down to 4Ω.

Ditch the JBLs, maybe move them to a second room as a pair of reference speakers (unless they're acting as stands) but never run two pairs of speakers at the same time for monitoring.

A good sub will IMO add a disconnected, uneven extra few octaves of bass on the bottom. Instead of getting a sub, I would personally opt for a proper pair of wider-range monitors.

TBH though, it sounds like you may have other things which need more attention. Do you have any sort of acoustic treatment? What are you actually recording?

[FoulCore]

I've been recording a pretty wide range of projects, but it seems lately my clientelle has been all "hardcore/post-hardcore" kids.

I use the JBLs mainly because the SL6 has great highs, but they have virtually no low end. The G500s compensate for this.

Acoustically, the room was professionally treated to have zero resonance and no audible reverb. I do all my tracking in the one single room. (building is hangar shaped with a flat roof and angled slopes connecting the roof to the walls. About 30' long, 18' across, 10' tall. Control room/isolation room is basically one corner of the building walled in with double insulation to block outside sounds.)

What would be a better setup for achieving solid mixes?
I've been fortunate enough to have a friend let me handle my mixing at his place until recently, and I need to rely on my home studio for my mixes.

[AlexK]

More speakers doesn't mean better sound, it just means more sound. Your JBLs are still reproducing top-end and mids at the same time as low end. I couldn't judge anything at all with two speakers running at the same time.

The Celestions have no low end really, and the JBLs are just well, loud and bassy (from what I've read online, never actually heard them to be honest). I wouldn't use either for monitoring. The Celestions are great hifi speakers though.

Get yourself a good pair of monitors. Yamaha HS80 if you want something truthful, KRK Rokit RP8 if you want something which sounds impressive/loud/deep.

A room with zero resonance? I'm intrigued...

[FoulCore]

I'm not sure about the engineering of the room. Just what te contractor told me when he came out. Lots of corkboard in the walls, and sound panelling like mad. I can't get any natural reverb (all my reverb is modeled) and the walls with the corkboard are pretty much just dead the second sound hits them.
He did awesome work, I can give you his information if you'd like.

I'll take a look at the HS80s.
As far as the amp, am I fine? I'm just fairly new to all this (2 years or so).
So I'm learning. forgive me for asking any idiotic questions. I'm just now going from the performing side of the field to the engineering field.