Announcement: A Sierra-1 add-on enhancement!

[curtis]

I agree with you assessment on the crossover of 60 vs 80..

Interesting. With the Rythmik in my system, I don't notice much difference at all between 60hz and 80hz crossover points.

[Pilk]

Interesting. With the Rythmik in my system, I don't notice much difference at all between 60hz and 80hz crossover points.

While I was playing with the crossover point on my Yamaha, I could really cross the subs at 80,90,100 without much difference. When I went 60 on down it really shut down the midbass and tone quality of the system. It became very thin. I don't know much about how it all works...I just plug in the numbers until I think it sounds good.

I do think the plugs were a plus for my situation. It takes all the guilt out of having the Sierra's in the cabinet.

Sometimes I wish the Rythmik subs had been an option earlier...I might have ponied up for a pair. As it is the ULW10's only cost me $280 each and they perform like champions. They are not limitless but when played within their design limits they sing and really extend the Sierra's. Having the dual subs located with the L/R Sierra's makes everything so seemless that it feels like I've got giant floorstanding speakers.

[Sam1000]

I got my port plus couple of days ago. I have not done any critical listening yet but it did seem to have extended the sound stage with b-plugs. I did not notice much difference with a-plugs with 10 minutes of non-critical listening..

[kylem]

I got mine for my center (thats in a BDI cabinet) a few days ago. After listening for a day or so I decided to check my levels again and noticed that I needed to bump up the level on my center just a hair. Did anyone else notice this or is that unusual?

[Pilk]

I got mine for my center (thats in a BDI cabinet) a few days ago. After listening for a day or so I decided to check my levels again and noticed that I needed to bump up the level on my center just a hair. Did anyone else notice this or is that unusual?

My center was further away from the listening area by about 1.5'. I didn't think much of it until I was having to run the center 2db hot (this was before the A Plugs). I had all the L/R/C all set to the same distance. I decided to adjust the speaker distance on the center to add the extra 1.5' and it made a noticeable difference. You might check the distance settings on the speakers first. What they did for me was to balance my system out and bring out the details that were lost with the in cabinet placement. Try tweaking things and you might be surprised what you will get out of them.

[kylem]

Yeah, I have played around with the distance settings quite a bit in the past. When I originally used my HK's EzSet/EQ it appeared to be a little off and I settled on using actual measurements with a tape measure. Once I bumped up the level of the center everything really sounds perfect now.

[davef]

I got mine for my center (thats in a BDI cabinet) a few days ago. After listening for a day or so I decided to check my levels again and noticed that I needed to bump up the level on my center just a hair. Did anyone else notice this or is that unusual?

Hi Kyle,

This is to be expected actually and basically means that plugs are working correctly for you. Since you have the center in a cabinet, it is more than likely that you have a bump in the response, typically somewhere in the 50-80Hz range. When you check levels with an SPL meter, it basically measures the average SPL over the entire frequency range being reproduced. By using the plugs and reducing the bump in the response, the average spl will measure lower.

Speaker sensitivity hasn't actually changed since sensitivity is typically calculated by using the output level of the midrange frequencies, of which the Q-Plugs will have no effect.

The benefit here is that the bump in the speaker's response has been reduced, the speaker will now measure flatter and setting center speaker levels will now be more accurate. Vocals should be more upfront, more prominent.

[kylem]

Thanks Dave, your explanation confirms what my ears were telling me about the vocals. They are definitely more pronounced now.

[omegacentrix]

Just wanted to add some more feedback to the thread - I got the plugs in about two weeks ago and have been putting them through the paces. I've got a pair of Sierras in a pretty small room and the Q-Plug A is definitely the winner for me. It clears up some mid-bass congestion and the sound is much more focused. Kudos to Dave F. for another great product!

Regards,
Dave

[millerwill]

Hi Kyle,

This is to be expected actually and basically means that plugs are working correctly for you. Since you have the center in a cabinet, it is more than likely that you have a bump in the response, typically somewhere in the 50-80Hz range. When you check levels with an SPL meter, it basically measures the average SPL over the entire frequency range being reproduced. By using the plugs and reducing the bump in the response, the average spl will measure lower.

Speaker sensitivity hasn't actually changed since sensitivity is typically calculated by using the output level of the midrange frequencies, of which the Q-Plugs will have no effect.

The benefit here is that the bump in the speaker's response has been reduced, the speaker will now measure flatter and setting center speaker levels will now be more accurate. Vocals should be more upfront, more prominent.

I have Sierra-1's L/C/R, on stands ~ 2 ft from a back wall (though the C sits on an equipment bench 2ft from the back wall), which are crossed with a sub (SVS PB10) at 70 to 80 Hz. I do have the plugs, but it's not clear to me if they really have much to offer since the sub takes the lower freqs. (Room is small/medium: 17' long, 14' wide, 8.3' high.)

Any suggestions for A, B, or none?