Is a Pass amp good for my speakers?

[osd1]

Hey now.

I really want a Nelson Pass amp. Some kind of Pass amp. The only issue I have is that I am told my speakers wanna see a "hot signal"- whatever that means.

The speakers are a 3 way SB Acoustics (8" and 6" woofer) and Morel (tweeter).
I don't have them built yes because I am having the crossovers designed for me by someone who knows what they are doing (I am a woodworker. If it's in inches or degrees or slopes I am good to go. If it is in ohms, mfd or volts I stay away).

The speakers rms (and by rms I mean "rarely means ****") is 60w. I have been told these speakers "open up" with more power than 60w and a "hot signal" (not quite sure what a "hot signal" is, but I know what "hot damn" is). But that could be because the people I spoke to don't have a true power rating the way a Pass Amp is.

Anyway enough babbling. Is a Nelson Pass Amp design good for my system? How much are the First Watt 25w amps? Can they be bridged for more power?

Thanks in advance.

 

[PKI]

It is hard to say without knowing anything about crossover and seeing the measurements. Probably, a single pair of outputs is not enough (like standard F5), but something with paralleled devises will be good. For example F5T or Aleph 60 (from my experience) can drive any reasonable speakers.

BTW, for Aleph 60 you can check swap meet ;-)

 

[osd1]

It is hard to say without knowing anything about crossover and seeing the measurements. Probably, a single pair of outputs is not enough (like standard F5), but something with paralleled devises will be good. For example F5T or Aleph 60 (from my experience) can drive any reasonable speakers.

BTW, for Aleph 60 you can check swap meet ;-)

thanks for the response. i'll wait till i have the crossover and measurements in hand before i pursue which specific amp i want to get.

 

[fpitas]

You should look at the F5 Turbo amp. 25W is a bit low for "normal" speakers, but the turbo has a bit more power on tap.

http://www.firstwatt.com/pdf/art_f5_turbo.pdf

 

[OllBoll]

Depends on how loud you listen and at what distance, 25W is a lot even with a normal 86-90 db speaker and you'd probably break your ears long before you exceed it.

Best you can do is to fetch a voltmeter and measure how many watts you actually listen to.

 

[osd1]

i used to use audio nirvana full rangers with a 6w tube amp and holy **** i could blow my ear drums on that, so i understand that.

im just gonna wait it out until i have the speakers

 

[Awh]

Hi, I hope you don't mind me asking this here, I was about to open a thread entitled "Are my speakers ok for a Pass amp?"

I'd like to build a Pass F5/F4/AJ amp reusing the common parts for each but i'm not sure if my speakers are up to the job, they are C. Rogers pro9tl transmission lines using Kef B139 (sp1004 96db), Kef B110 (sp1003 96db) and Kef T27 (sp1032 80db). they also use coles super tweeters (87db)

I listened to some music and set the volume control as loud as i would ever have it and used True RTA with the the amplitude set at 0db, the AC on my speakers was about 2.4V.

Thanks for reading.

 

[OllBoll]

Hi, I hope you don't mind me asking this here, I was about to open a thread entitled "Are my speakers ok for a Pass amp?"

I'd like to build a Pass F5/F4/AJ amp reusing the common parts for each but i'm not sure if my speakers are up to the job, they are C. Rogers pro9tl transmission lines using Kef B139 (sp1004 96db), Kef B110 (sp1003 96db) and Kef T27 (sp1032 80db). they also use coles super tweeters (87db)

I listened to some music and set the volume control as loud as i would ever have it and used True RTA with the the amplitude set at 0db, the AC on my speakers was about 2.4V.

Thanks for reading.

It seems that the speaker is ~ 8 ohm and if I remember my math correctly 2.4V RMS into 8 ohm is 0.72W.

And since 0.72W is far less than 25 W you should be ok with a Pass amp =)

 

[Awh]

Yes they are 8 ohm, thanks for confirming that, time to start collecting parts.