Intro stability

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Originally posted by edwin green:
Has anybody got any experience of paving slabs or mana soundbases with intros?

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Not with Intros but with Credos.

My listening room is pretty small (12 x 9) and I had some bass control problems using the Credos in there. Adjusting the distance from the wall had a positive effect (they seemed to work better quite close) but going active had a much bigger impact.

Putting Mana flat-tops under the speakers also helped to tighten up bass control quite a bit, although not to the same extent as going active did.

Regards
Steve

Have you tried four pozi head screws in the floor and placing the intro's on top off those.
I had a similar problem with Intro's and this definitely fixed it for me.
A bit of an art to it, i.e. doing it easily with all the spikes lining up with the screws so if your interested email me direct and I'll talk you through it.

Hi Edwin:

If you can feel the bass through the floor in the next room I presume you have floorboards not a concrete floor?

Assuming floorboards, it's been my experience with Credos (which are close enough to Intros for government work) that you may have a bit of a fight on your hands. My findings, in no particular order:

1). Close to wall placing is definitely not a necessity. My Credos are way out in the room. I have typical plasterboard walls which exacerbated my own bass issue.

2. Controversial here but I think that MMMMM.... does more harm than good with the leaf spring back end of the Intro/Credo. Tighter bass but nerve jangling mid-range.

3. The Credos *have* to be very firmly planted to give anywhere near their best. On a wooden floor this is a toughy, as after only a few days use the spikes will not be as solid in the wood as before and the bass thing will creep back in, - insidiously. Resting the spikes in the cross-heads of Philips screws works to a certain extent but after a while you may become aware of the 'buzz' that it can induce. However, this is the easiest way out and probably worth a try before getting serious.

Personally, I made some plinths and I can send you construction drawings if you like. However be warned that they're not pretty. Not actually ugly but some of the materials involved don't lend themselves to be finished professionally when you're on a bugdet that allows only double-sided sticky-back plastic and the carboard inner from a toilet roll as tools.

If I remember correctly I sent drawings to Steve G when he had Credo issues but I'm sure he just giggled and threw them out before his wife saw them.

Best Regards,
Mark Dunn

Hi Edwin

I've had experience with siting Credos and Intros and they really beenfit from good setting up so I can sympathise if they're not quite working right.

Anyway after mucho experimentation I ending up prefering them about a foot or so from the back wall, in all rooms I've used them. I wouldn't recommend putting anything in between them - they just shut up shop and go home (music wise!).

I've had very good results with NAME's screw heads into the floor - that's definitely worth a try. However, never noticed a buzz like Mark has but it'd obviously be something to watch out for.

In my current room the Credos sit on bare Matai floorboards. They're lowered as far as they can go on their spikes and level. I'd do the screw thing but I've got to move them over the weekend!

I don't have much experience with this but your problem "may" not be the speakers but somewhere further up the chain. Why don't you try shifting some of your gear around - onto the floor or onto another stable table, see how it sounds. Worth a crack and free too

Jay

Intros have a looser bass than Credos.

Floorstanders need extensive bracing which costs money. Mana Sound Bases may help though.

Regards,

Steve.

Let your ears do the talking, let your remote control do the walking...

[This message was edited by Steven Toy on FRIDAY 09 August 2002 at 06:42.]

Something you could try is putting damping material inside the speakers, around the bass reflex slit area. I used stuff that's meant to stuff pillows with, as I happened to have it at home! Start with a handfull and experiment with the amount.
Without it I would describe Intro:s bass as: It starts properly, then blooms out on the sustain and finally stops properly. With damping material the bloom goes away.

JohanR

quote:

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Originally posted by Mark Dunn:

If I remember correctly I sent drawings to Steve G when he had Credo issues but I'm sure he just giggled and threw them out before his wife saw them.

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You did send them but given my level of DIY competence is lower than Steven Toy's self esteem I decided to give the Mana a try before trying to find someone to build them for me!

If I recall correctly your listening room has a suspended floor - mine has a solid floor with laminate on top and the Mana worked quite well for me. The combination of going active with the Mana in place pretty much cured my bass boom problems.

Not that it mattered for long anyways as I retired my Naim kit (other than the CD player) and replaced the amps & speakers with an Audio Note/Triangle setup better suited to the small room.

I was speaking to an architect last night about extending over my garage, which will give me something like a 20' x 14' listening room with a suspended floor so the Naim stuff may well end up in there.

Regards
Steve

Place the speakers right. And let the spikes go into the floor.

I have placed mine perfect now. I don't got this problem.




/ J

David I bought the same things from a shop on london, about a 15 quid I think.

For me they were utter cak, they not only tightened the bass, but took it out for a drive and I never saw it again, until I removed them.

They remain in the sin bin, a constant reminder that I could have got a nice cd with the money.

Use two pence peices only costs 16p.

Hi all:

Steve G wrote:

>I was speaking to an architect last night about extending over my garage, which will give me something like a 20' x 14' listening room with a
suspended floor so the Naim stuff may well end up in there.<

My listening room in Memphis, TN was exactly that size and over the garage too. It was a bitch to get sounding right and my advice would be to make sure the floor is really well braced.

Best Regards,
Mark Dunn

...cos I am

My lower cost solution than 2p pieces costs half the price. Why have ugly 2ps, when a 1p will accommodate the point of a spike quite easily?

My Credos can be a bit bloomy. Anyone else experimented with the bass slit / damping material options? I'm sure Naim must have before they concluded their design, but hey, Naim may have had a different floor?!

There's always money somewhere for the next upgrade...

Thanks for all the suggestions. I'm really chuffed that people took the time to reply.
One of the problems is that I've used kan 2s in the past which have a rather tighter bass end...
The house I'm in at present is rented which precludes the philips screws in floor solution. I'm sure that improving the rest of the system would produce the biggest improvement but I'm really not keen on doing that at the moment so I'll carry on experimenting.
Edwin

How bigs your listening room ?

I used Intros for 3yrs, half way through i introduced Mana Soundbases with astonishing results - bass got deeper, and had so much more grip and control...

I played around with Intro positioning for ages, in the end as close the the wall was best, i ran mine active so the cross-over was removed, enabling me to get 0.5" from the rear wall.

The Intros (Mk 1) are excellent speakers, stick with them - i found the SBLs did'nt excel until my front-end and pre was sorted.

Get the Soundbases
I'm going Phase 5 with my SBLs tommorow

naheed
active Phase 4 SBLs is the only way...

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The house I'm in at present is rented which precludes the philips screws in floor solution

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Edwin

That's never stopped me before - in fact it's preferable

Jay