Please Post your Infinity speakers

[Negotiableterms]

1.4 Ohms!!

You're gonna need a real workhorse for that!

Vito, you mentioned a P/L 700. At 1.4 ohms, will it still be stable? To go that low, I'd think of looking for something more like an autoformer Mc, or one of the real high-end behemoths, like a Threshold or Audio Research D-400/2. Something that weighs at least 100 lbs.

 

[Vitopanch]

1.4 Ohms!!

You're gonna need a real workhorse for that!

Vito, you mentioned a P/L 700. At 1.4 ohms, will it still be stable? To go that low, I'd think of looking for something more like an autoformer Mc, or one of the real high-end behemoths, like a Threshold or Audio Research D-400/2. Something that weighs at least 100 lbs.

Negotiableterms,
Yes, very much so. I have six Phase Linear 700's ATM. I have been using these amps to power My RS 4.5's and my RSIIA's, along with some JBL's that I have. I have been using Phase Linear power amplifiers for 26 years now and swear by them. They have never had any problem at all. The RS 4.5's are the real test as each cabinet has two 12 inch Watkins woofers to drive. I usually play music just under clipping, which is at front row club level in my environment and they sing for hours on end without question.

A friend of mine, was a factory technician at Phase Linear and still has a shop in which he services and refurbishes the equipment. I consult with him periodically concerning the equipment. He actually has gone over all of my gear at one time or another. He assured me early on that the 700's would handle the Infinities without hesitation and he has proven to be correct. He knew this for sure because at the time that the QLS and RS 4.5's came out, they tested with them. He did caution me concerning the 700B, which I have never owned, as being less stable than the Series One and Series two. Clair Brothers used these exclusively for years for the concerts that they were contracted for. As a matter of fact, Bell Labs did as well for their testing and Audio Analyst in Montreal used them exclusively for the Summer and Winter olympics. They are very very solid power amplifiers.

In the 26 years I have never had a Phase Linear Power Amplifier fail at all and I have owned 16 of them.

Fun talk for me. I do not have many opportunities to talk about them.

Vito

P.S. I am always looking for more. They are easy to tuck under things such as sofas. Ha Ha

P.S. I have one of the Clair Brothers PA's, two of the Bell Lab PA's(only seven were made) and even a pre- production 700 that Bob Carver put together himself before they went into production. Fun stuff. No, I will not give out my address. Beware of the dog. Ha ha.

 

[Grainger49]

1.4 Ohms!!

You're gonna need a real workhorse for that!

In a deep announcer's voice: Sounds like a job for my old Krell KSA-250S !

Weighs in at 145#. Not a light weight.

 

[tsjuus]

Very nice Leon,
I have not seen the Genesis before. Is that a passive radiator on the bottom?
Vito

Yes, gives it more bass than the 8.2! :thmbsp:
Original in green, but reconed in grey. See http://www.humanspeakers.com/genesis/gen2.htm for more information on these rock-beasts.

 

[vendo81]

I have 1980 RS-4.5's. Great smooth sounding mids and highs,deep base when bi-amped...Keith http://us.f13.yahoofs.com/bc/43e9eb7bmd5bea5c1/bc/internetuploads/infinity.jpg?BC4swvEBRVTvAtdP

 

[Vitopanch]

Vendo81,
Kewl deal. Those surely are great. I have never heard or seen any loudspeakers that look or sound better to my ears and eyes. What do you power them with?
Vito

 

[Vitopanch]

Here are some pictures of my RSIIA's;

 

[Vitopanch]

More.
Vito

 

[Vitopanch]

The end.
Vito

 

[Grainger49]

Powered by Phase Linear 400s?

Nice pictures. Next we will show you how to turn them so they are upright!

Seriously, you can view the pictures and turn them with windows fax/picture viewer. After correcting the picture's orientation, it will always be viewed that way.

At least that has been my experience with posting here.

Good luck with the pics, nice speakers!

 

[Army]

Hey Vito nice pic's...

Curious about your opinion of the base output of the RSIIA's compared to the RS4.5's with the watkins woofers. I notice that the 4.5's are susposed to get down to 24hz and the RSIIA's are rated at 25hz. I always wondered if the bullet woofers get as low?

 

[Vitopanch]

Army,
Both my RS 4.5's and the RSIIA's are bi-amped with Phase Linear 700 power amps, and both use identical Acurus pre-amps, therefore I can give you an accurate answer.

Using say Power of Love by Celine Dion as a reference, which has astounding true bass, without question the RS 4.5's have much more bass impact. I would say that they both get down approximately the same hertz, but the RS 4.5's move noticeably more air. Sitting at approximately 15 feet from each pair and playing the same program material you can FEEL the air move past you with the RS 4.5's and much less so than the RSIIA's. Both produce tight bass at about the same hertz, but the sonic impact of the RS 4.5's is astounding whilst with the RSIIA's I would say that it is excellent.

I have never had the opportunity to do so, however, I would not be surprised that at equitable volume's the RS 2.5's would produce the same results. I could of course be completely wrong, however, it would not surprise me at all.
Vito

 

[kurtgo]

Vito - you are correct regarding the bass "punch" of the 2.5's. I have the RSIIb's and the 2.5's. The 12 inch Watkins puts out more bass feel. However, have you ever heard the 9.1 Series II's in the "video" mode? The bass is great then all of a sudden - with a really low bass signal - they impact almost like my SVS sub. Wow. Sold 'em though.

 

[vendo81]

Hi Vitopanch,
Great setup! Sounds like the Infinity's sound good with Phase linear amps?.. I was using two Threshold class A amplifiers with the Infinity's. I tried several amplifiers including 2 SAE 501's( I read they sound great with Infinity's) but the Thresholds seem to sound best.I've got the Infinity's in my garage until I rebuild the crossovers. I had to have the woofers rebuilt when I got them. I took them to local OC speaker to do the job. I am having problems with the bass though. The bass is deep but boomy (kinda like the thumping you hear from some cars on the road).The mids and highs are incredible! :yes: They belonged to my brother and I don't remember bass problems when he was using them. At first I thought I'd rewired it wrong as there is 4 wires per woofer, but I was careful and had made a good diagram. I tried the different amps, added an eq and finally decided I'd put them up until I rebuild the crossovers. The crossovers seem abit complex compared to my DQ-10's I rebuilt. I think the Infinity's will be very nice when done.Do you use the external crossover that came with the 4.5'S?

 

[vendo81]

Just wondering..I'm new and am having problems posting photos..They download but I'm told that the file is too large. Does anyone know how to decrease the size of photos? Sorry to sound so ignorant :scratch2: Thanks.

 

[Vitopanch]

Powered by Phase Linear 400s?
Nice pictures. Next we will show you how to turn them so they are upright!
Good luck with the pics, nice speakers!

Hail Grainger49,
Close. They are Phase Linear 700's. You have a good eye.

As far as the pictures, are you saying that when you view them they are upside down?

Best regards,
Vito

 

[Vitopanch]

Hail Vendo81,
First off with the pictures, before you upload them. right click on each one and select resize picture. The select the smallest size and it will work that way when you upload it.

Thanks for the comment on the setup. Yes, the Phase Linear's do justice to the RS 4.5's BIGTIME. I have some familiarity with the Threshold's and they are great power amplifiers. They will really make the RS 4.5's sing I betcha.

That is strange about the boominess from the woofers. I am quite ignorant electronically so I am clueless as to what will cause that. However, I can say this, that when operating properly there is zero boominess. It is amazingly tight. Good luck with that, I wish that I possessed knowledge to pass on.

Yes, I do use the active equalizer that came with the RS 4.5's. I have them activiely bi-amped using the box. Each Phase Linear 700 has one channel running the bass of one channel on one side and the highs and mids with the other side. As I was informed by a friend of mine who was/is a service tech at Phase Linear, they actually tested with RS 4.5's and RS 2.5's during their R&D and the marriage was in mind throughout the process. They get along real well, without any squabbling.

Congrats on having those RS 4.5's. There are not a ton of them around and IMO are visualy and sonically works of art.

I am quite interested in staying abreast of your progress as you get them going and matched up with your electronics.

Best regards,
Vito

 

[vendo81]

Vito,
Thanks for the help with photos. I've been collecting audio stuff since I was a teen in the 70's. It makes since that the Infinity's were originally tested with Phase linear amps as the Infinity's need lots of power. The Phase linears are noted for LOTS of clean power.I've never heard Infinity with Phase linear but I've always loved the phase linear equipment. The looks can't be beat and my memories of "great" systems I remember from my younger days usually included a beefy Phase amp. I've been very tempted to buy a 400 off the internet. Just love those big VU meters! :thmbsp: I'll post the results when I get the 4.5's done.

 

[Vitopanch]

Vito - However, have you ever heard the 9.1 Series II's in the "video" mode? The bass is great then all of a sudden - with a really low bass signal - they impact almost like my SVS sub. Wow. Sold 'em though.

No, I have not kurtgo, however you have piqued an interest. I will check them out. Kewl deal.
Vito

 

[phaedrus]

Let's see if I can figure out how to post pictures so Grainger doesn't get upset with me. I have RS-1A's with dual woofer towers, RS-II, and RS-5s.

David

P.S. Sorry about the picture quality, I'm not much of a photographer!