New Stellar m700/GCD -- hookup to a single REL?


#1

I’m excited to receive the m700/GCD combination in 2d, replacing my existing Rogue Sphinx v2 integrated with Mullard tubes, that my son will get as a nice hand-me-down. This is my first time with the forum.

My inputs are an Oppo 105D playing Tidal and CD’s. I have Magnepan 1.7i and a single REL T9i. With the Mullard-modified Rogue and the stock treble attenuators in place on the Maggies, the system provides a nice midrange and bass extension, but with some congestion and lack of clarity with complex treble passages such as orchestral climaxes and intense lead guitar.

In an old post, I saw that Paul liked Rel’s in general. An advantage is the high level connection via a Neutrik cable from the main speaker outs from the amplifier. This supposedly helps with coherence between the Rel and the main speakers. Rel’s instructions discourage use of a single sub with monoblocks. The alternative to getting a second T9i would be an RCA cable hook-up from the pre-amp, potentially sacrificing the coherence provided by the high level Neutrik connection. The problem with attempting a high level connection with two monoblocks is apparently the risk of a ground loop, with hum or worse consequences. A second T9i is not in the cards right now, but maybe down the line.

Does anyone have experience with this type of set-up? Does the presence of a second speaker output terminal on the m700’s come into play? Thanks in advance.


#2

i have the m700 combo with maggie 1.7’s and a single rel t5; i used the neutrik cable with the connection scheme being yellow to left +, red to right + black to chassis and experienced no hum…yes it was not the recommended for a single mono block application but it works…


#3

Thanks Pete. I appreciate your experience, sounds encouraging.


#4

Welcome, DougB!


#5

pwfulpete givens excellent advice to correctly connect the high level Neutrik for a BTL amplifier such as the M700s.

There’re certain system configurations or set ups where the Neutrik connection with a single sub is just not practical. Even though I would recommend you go with the high level, I would not let it be the deciding factor on whether or not to buy a REL sub. They’re simply the most musical sub I’ve ever heard, even when fed audio via an RCA.


#6

Thanks for endorsing pwfulpete’s set-up advice, Darren. There are not many companies where the product designer weighs in on a blog post from a new customer. I’m truly thankful and excited to start warming up the combo tomorrow!


#7

I’m now about 50 h in to burn-in, and am delighted with the sound coming out of my 1.7i’s. The sense of liveliness and richness is superb, now that I’ve made XLR connections (Mogami quad wires). I’m floored with the bass extension, even without the sub. For what it’s worth, I have the m700’s side by side rather than stacked, a la Stereophile.

I’ve made the hook-up suggested by pwfulpete and Darren with no hum issues. I’ll give it more time to decide what the sub is contributing.

Thanks again for the great gear and support.
Doug


#8

Thanks for letting us know!


#9

Hi.
Sorry if this is a bit old, but could you please clarify on the connections to a single REL sub. Pete says the black goes to the chassis but gives no specific point to connect to on the M700.

Any help would be greatly appreciated.


#10

I guess you could try loosening one of the top panel screws at the rear of the M700 unit, wrap the black wire around it then tighten it down. My after market REL cables would not work with that approach. I wound up leaving the black wire loose (wrapped in black electrical tape) and connecting a cheap RCA cable from the REL 1/LFE input to one of the digital inputs on the GCD. That’s the approach REL suggests. It works great.


#11

Hi colin:

As you mentioned, there is no specific ground terminal on the m700’s. Following the advice earlier in the thread from pwrfulpete, I connected the black Rel wire to a chassis screw on the lower surface of one of the M700’s. Works great.


#12

Hi Doug, apologies for not replying sooner.

I had it sorted before your email (I undid a top screw and slid a spade connector between the top plate and the chassis), but many thanks for taking the time to help.

Thanks again and best regards,

Colin.