What's The Deal With Amps?

somody · 20th May 2005, 12:41 PM

I have plans to make a home theatre system. I will be using the Panasonic XR50 Receiver (100WPC). Since the sub that i will use is a Lightning Audio p2.10.4, I don't plan to take it up past about 100W RMS. Do i need an amp, or can i run it direct from the receiver? Oh, and if i use a 100W receiver with a 70W amp (if i need to), how will it go higher than 170 W? This is so confusing.

Al.M · 20th May 2005, 02:28 PM

Not sure if I understand you correctly, but you should generally forget about watts/power outputs. Most subs come with an in-built amp to power only the sub, so you will still need a separate amp or receiver (with its own amp inside) to operate satellite or stereo speakers. Any 60W +/- receiver or AV amp will do but make sure that the receiver has a subwoofer connection at the back panel. True hifi receivers may not have sub connection, but I think you really mean AV amp (audio visual amp with tuner built in together). In the end its not that important to perfectly match watts between AV amp and sub.

fb · 21st May 2005, 03:52 AM

I have that reciever. I'm in the process of building my sub, which is going to be connected from the sub out of the XR50 to the low level in on a Rythmik audio A250Se 12db plate amp.

Though I may try with the high level inputs at some stage, not sure.

planet10 · 21st May 2005, 09:52 AM

Usually an HT receiver expects your sub to be self-powered and only has a high level output to drive it.

dave

Cal Weldon · 21st May 2005, 04:49 PM

High level Dave?

Cal

planet10 · 21st May 2005, 07:04 PM

Quote:

Originally posted by Cal Weldon
High level Dave?

Confused? I meant low level, pre-amp out to drive high impedance powe amp input...

dave

Cal Weldon · 21st May 2005, 07:07 PM

Quote:

Originally posted by planet10
Confused?

Not anymore

20th May 2005, 12:41 PM	#1
somody diyAudio Member Join Date: May 2005	What's The Deal With Amps? I have plans to make a home theatre system. I will be using the Panasonic XR50 Receiver (100WPC). Since the sub that i will use is a Lightning Audio p2.10.4, I don't plan to take it up past about 100W RMS. Do i need an amp, or can i run it direct from the receiver? Oh, and if i use a 100W receiver with a 70W amp (if i need to), how will it go higher than 170 W? This is so confusing.

21st May 2005, 09:52 AM	#4
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Usually an HT receiver expects your sub to be self-powered and only has a high level output to drive it. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

21st May 2005, 04:49 PM	#5
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	High level Dave? Cal __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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20th May 2005, 02:28 PM	#2
Al.M diyAudio Member Join Date: Jul 2001 Location: Australia	Not sure if I understand you correctly, but you should generally forget about watts/power outputs. Most subs come with an in-built amp to power only the sub, so you will still need a separate amp or receiver (with its own amp inside) to operate satellite or stereo speakers. Any 60W +/- receiver or AV amp will do but make sure that the receiver has a subwoofer connection at the back panel. True hifi receivers may not have sub connection, but I think you really mean AV amp (audio visual amp with tuner built in together). In the end its not that important to perfectly match watts between AV amp and sub.

21st May 2005, 03:52 AM	#3
fb diyAudio Member Join Date: Apr 2005 Location: Brisbane, Aus	I have that reciever. I'm in the process of building my sub, which is going to be connected from the sub out of the XR50 to the low level in on a Rythmik audio A250Se 12db plate amp. Though I may try with the high level inputs at some stage, not sure.

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