Monster Sigma Mythology - Need Answers


Back in the mid 1990s I fell into spools of Monster M Series M1500 and M2.4 Biwire. The M2.4 does not have the network terminator and I had to terminate the M1500 (don't do this as it takes forever, and ever, and ever). Before I knew it I had an entire system cabled with the much maligned Monster products and there they've stayed all these years, but now I have a 1 meter pair of the mythological M2000 Sigma interconnect in route.

I write this due to the complete lack of information on the net about upper end Monster cables. The new retro cables actually have some discussion on the net, but then you'll see claims that the old M2000 Sigma was better. Similar controversy may exist with the speaker cables with the old M2 Sigma.

The M2000 Sigma interconnect I purchased in ignorance thinking it was using the newer generation, low capacitance PEX dielectric first found in M1000i and the M2.4s biwire Speaker cables (cables are nearly black whereas older Monster M Series is gray.) I’ll update the table below with its capacitance which is likely frighteningly high. In searching I saw an Ad for M1500i, but without visual confirmation I belief this is a myth. (Or does M1500i exist?)

I am hoping the Agon community will help fill out this thread with details on the various monster top offerings. I'd like to keep this to M1000 and above interconnects and M2.2s Speaker cable and above. So some tabular info follows including capacitance which is a big issue for tube equipment (we can update values if anyone can provide missing numbers by measuring with capacitance meter)....

Interconnect (1 meter pair):
MODEL VERSION YEAR PRICE CAPACI NOTES
M1000 Laboratory Ref
M1000 Sonic Ref. Std.
M1000 Mk. II Sonic Ref.
M1000 Mk. III Sonic Ref. $200 162pf Isotec
M1000i PEX
M1000i Ultimate (PEX) PEX
M1500 $400 278pf
M1500i
M2000 Sigma $800

Speaker Cable (8 foot pair)
MODEL VERSION YEAR PRICE NOTES
M2 Sigma $2000
M2.4s Biwire $800 Best?
M2.2s

Decided to leave out Retro in table. Please discuss your sound experience with these. Monster has a bad name with audiophiles, but these cables were designed with technology licensed from Bruce Brisson of MIT fame. The earlier interconnects are extremely capacitive and that would account for their dark sound with some tube equipment. You do not want excess length! All of these are well liked to my knowledge except perhaps the M1000i ultimate which an Amazon reviewer said sounded more rolled off then his old M1000. M1500 considered sizeable step up from M1000. M2000 is not as big a step up. Until the Retro Gold, I don't think Monster put out anything above M1000i with the lower capacitance PEX dielectric.

On the speaker cable front I left out the older Monster stuff except the outrageously priced Sigma M2. The M2.4s is really, really good even at retail and can be had used easily enough given the Monster reputation among audiophiles (most of whom would be embarrassed to have it in their system). Don't be shy Monster lovers!
meles

@meles

organic2000 currently has a few M1000 mark 2 with black jacket. The box, assuming its original does say PEX

However, the Grey jack which has lettering does not mention PEX 

Very confusing

Have you heard the Sigma Gold Retro rca’s? I have yet to see a Sigma RG interconnect anywhere for sale.

I’ve been using a pair of vintage Monster M2.2s for the past 3 weeks and they are fantastic speaker cables. There are a few M850's interconnects for sale.

Yeah I mentioned organic2000 because his listings are endlessly confusing and in my opinion quite shady since he also has some listings where the termination is via some other kind of connection. interlink2 on ebay also is based in San Francisco (Monster HQ). Clearly they both have some kind of inside track, but may have been in diapers when the stuff came out haha. DO NOT BUY that MK2 cable as that is the old grey stuff.

Beware that Monster sold even there speaker cable unterminated (and it has a termination network.)

I was not even aware of the Sigma Retro Gold outside of the speaker cable (or maybe I’d dismissed it), but this guy did not care for it:

This has a lot of nice pics and shows a couple of the different rca connectors from M2000.

Do not buy M850s; they are nothing. I’m also quite leary of the later stuff with the white connector that Organic2000 has claimed sounds better, but if the price is right you could try one and compare.

Some things for you about these interconnects:

1. The connectors can rip off an RCA jack on a piece of equipment and did so to an svs subwoofer I own.

2. The larger the cable the harder they are to terminate. I’ve done M1500 quite a bit and that is a lot of work. M2000 Sigma is double that work. M1000 won’t be easy, but it is 1/4 the wire of the Sigma

3. You want the PEX as stated earlier. Hard pass on the light gray stuff.

 

I also own M2.4s biwire (might be rusty on the name), both terminated and unterminated. That you want terminated because of the network.

I have a lot of unfinished Sigma work and it is not for the faint of heart. Somewhere I have one I bought some RCA connectors for a run to subwoofers, but I frankly don’t remember what I ended up buying. I’m sure there are better connectors around, but the amount of work involved is extreme. If someone is selling this stuff with a really good connector that might actually be a deal, but otherwise your resale would be horrible without factory termination. And I believe the thicker interconnects are more likely to break. They have some strain relief in the barrel, but extreme care must be taken with these connectors since they can damage components and themselves with improper handling.

The non-Pex stuff is very capacitive and you can see going from 1000 to the 1500 nearly doubles the capacitance. The PEX lowers the capacitance which is very helpful to the sound, but the cables are still highly capacitive. You need to be aware of this and minimize its impact depending on what you are connecting. I’m probably over stating the peril since my system was triamplified and the line stage was seeing a lot of load so I had to the connections really short. The Sigma is helped by the PEX, but since it is double the thickness of M1500 it is no picnic.

Does your system need M2000 instead of M1000i? Well that depends on how much low bass you do. If you’re running Magnepans that get down to 40 hz only then probably not as much benefit.

I’d say M2000 was the pinnacle of the monster sound with their time coherent wires and there are certainly a lot of better overall interconnects around, so its just a matter of the bang for the buck. It seemed like some of "Asians" (not sure if China or Japan) were hoovering up M2000 ten years ago. I’m far from an expert on interconnects, but if you want to check out the sound I’d try the m1000i out a bit (again don’t know about "Gen II" since I got started with M1500 and like it quite a bit, so I went for M2000.)

(As an aside I do believe there were different manufacturing runs of M2000 as I seem to recall thinking some of my cables were a touch later for some reason, but I'm pretty sure it doesn't say anything on the wire and I did like the later stuff just a cork sniffing touch more.)