11.2 system from scratch, well mostly

[CBASS]

There's this one which I use with satisfaction:
https://www.amazon.com/XANTECH-AC1-Controlled-Discontinued-Manufacturer/dp/B000NU0T62/ref=sr_1_1?ie=UTF8&qid=1533660569&sr=8-1&keywords=xantech+ac1+controlled+ac+outlet&dpID=41WGdQ09LXL&preST=_SX300_QL70_&dpSrc=srch

I’m going to start looking into them. Either that or I just leave it on. I don’t see it drawing much power idling. What do you use to trigger it on?

 

[CBASS]

I just found this little Gem. Now I’m wondering if I shouldn’t purchase the other 3802 I see for a hundred bucks and drive a couple more speakers lol. If this works I’m not sure why anyone would spend a ton on dedicated power amps vs picking up these old receivers. There’s probably a reason I’m sure.
https://www.bitsltd.net/products/Details.aspx?p=2603902&c=460&g=1974

 

[Verdinut]

I’m going to start looking into them. Either that or I just leave it on. I don’t see it drawing much power idling. What do you use to trigger it on?

I am using it to operate the AC Infinity fans on top of the Marantz AVR. It's triggered by a designated 12v output on the SR5010. Unfortunately, the 12v trigger output on the 5010 does not provide enough amperage to drive 3 fans directly.

 

[CBASS]

Ah makes sense. Something else I’ll have to add are some cooling fans. I figure I’ll use HDMI ARC via XBOX one to turn on the main system which if plugged into that little power bar should power everything. It’s going to be quite the experiment. If this works I see more receivers in my rack soon lol.

 

[Verdinut]

Ah makes sense. Something else I’ll have to add are some cooling fans. I figure I’ll use HDMI ARC via XBOX one to turn on the main system which if plugged into that little power bar should power everything. It’s going to be quite the experiment. If this works I see more receivers in my rack soon lol.

I don't think the route to using additional receivers to the spare 3802 as external amps would be a wise one. Good used pro amps are electronically less complex and more reliable than any receiver and you can often get them for less than a used discontinued receiver. You can find them at decent prices on the Canuck Audio Mart site as well as on eBay.ca.

 

[Verdinut]

I just found this little Gem. Now I’m wondering if I shouldn’t purchase the other 3802 I see for a hundred bucks and drive a couple more speakers lol. If this works I’m not sure why anyone would spend a ton on dedicated power amps vs picking up these old receivers. There’s probably a reason I’m sure.
https://www.bitsltd.net/products/Details.aspx?p=2603902&c=460&g=1974

This looks like a decent smart power strip. Good customer reviews on Amazon.ca

If you can get it at the wholesale price, you would get a good deal. Amazon.ca are asking $76 for it.

 

[KEW]

Well, you had the advantage of comparing the specs which I didn't have at hand. That's my excuse!

I think the more appropriate response in this situation is to say you would advise against buying that amp without more detailed specifications.

 

[Verdinut]

I think the more appropriate response in this situation is to say you would advise against buying that amp without more detailed specifications.

That's it_____Without more detailed specs! Peavey don't disclose the full specs. They only specify THD at 1 KHz on a 70 volt line. What is the THD from 20-20K at rated power at 4 and 8 ohms? What is the power bandwidth? What is the frequency response like at full power? Compare the specs of any QSC amp and you will be provided with detailed specs.

IMO, this amp has a very poor low current power supply as it's rated power output at 4 ohms is inferior to that for an 8 ohm load. It is indeed specifically designed for paging. I wouldn't recommend to anyone to acquire such product unless it's purpose is to use in venues for paging purposes. With the info at hand, this cannot be classified as a true hi-fi amplifier.

Let's ask @PENG what he thinks of that amp in a high-end home theater system.

Edit: Specifications:

• Model: CM 2208
• Output Power 4 Ohms: 150W x 8
• Output Power 8 Ohms: 220W x 8
• Output Power 70V: 20W x 8
• Frequency response (1W into 8 Ohms ): 1KHz, <0.02% THD+N, one channel driven, non-bridged operation - 5Hz to 20kHz, +/- 1dB
  THD+N: <0.02% at rated power (@ 70V, 1kHz)
  Damping factor: 200:1 into 8 Ohms
• Input CMRR: >60dB @ 1KHz
• Input sensitivity @ 70V: 0.775V for full rated output power (0.775V gain selected); .75V for full rated power (x40 gain selected)
• Input impedance: 20Kohms balanced, 10Kohms unbalanced
• Hum and noise: -97dB, A-weighted
• Crosstalk: < -60dB below max rated power (1KHz)
  Power supply: linear transformer
• Circuit breaker rating (120V/230V): 12A / 6A
• Current draw (120VAC), 1/8 power, 70V: 4.0A
• Current draw (120VAC), 1/3 power, 70V: 8.0A
• Current draw (120VAC), at idle: <2A
  Thermal emissions 1/3 power, 70V: 947 btu/hr

 

[KEW]

That's it_____Without more detailed specs! Peavey don't disclose the full specs. They only specify THD at 1 KHz on a 70 volt line. What is the THD from 20-20K at rated power at 4 and 8 ohms? What is the power bandwidth? What is the frequency response like at full power? Compare the specs of any QSC amp and you will be provided with detailed specs.

IMO, this amp has a very poor low current power supply as it's rated power output at 4 ohms is inferior to that for an 8 ohm load. It is indeed specifically designed for paging. I wouldn't recommend to anyone to acquire such product unless it's purpose is to use in venues for paging purposes. With the info at hand, this cannot be classified as a true hi-fi amplifier.

Let's ask @PENG what he thinks of that amp in a high-end home theater system.

Edit: Specifications:

• Model: CM 2208
• Output Power 4 Ohms: 150W x 8
• Output Power 8 Ohms: 220W x 8
• Output Power 70V: 20W x 8
• Frequency response (1W into 8 Ohms ): 1KHz, <0.02% THD+N, one channel driven, non-bridged operation - 5Hz to 20kHz, +/- 1dB
  THD+N: <0.02% at rated power (@ 70V, 1kHz)
  Damping factor: 200:1 into 8 Ohms
• Input CMRR: >60dB @ 1KHz
• Input sensitivity @ 70V: 0.775V for full rated output power (0.775V gain selected); .75V for full rated power (x40 gain selected)
• Input impedance: 20Kohms balanced, 10Kohms unbalanced
• Hum and noise: -97dB, A-weighted
• Crosstalk: < -60dB below max rated power (1KHz)
  Power supply: linear transformer
• Circuit breaker rating (120V/230V): 12A / 6A
• Current draw (120VAC), 1/8 power, 70V: 4.0A
• Current draw (120VAC), 1/3 power, 70V: 8.0A
• Current draw (120VAC), at idle: <2A
  Thermal emissions 1/3 power, 70V: 947 btu/hr

Pretty hard to interpret that!
When they say:

• Output Power 4 Ohms: 150W x 8

Do they mean it puts 150W into 8 channels simultaneously? If they are "continuous" or RMS, that still is very impressive. As has been discussed (in PENG's thread about "does S&V test data affect your buying decisions" (I'm guessing title from memory) thread, IIRC) no one tests 5 channels into 4 ohms continuous power-full bandwidth!

 

[lovinthehd]

It's a multi-channel amp (8 channels) with several applications and seems to have plenty of power with that in mind. It isn't spec'd for the home audio consumer who worries about specs more than necessary, but it will work just fine for a variety of home audio applications just fine as long as the power meets your needs (and would exceed that of the OP in any case) and the fan noise and phoenix connectors are understood. Worrying about spec that is basically inaudible....meh. For the USD 295 I paid I don't consider it a poor purchase. YMMV If you want prettier/more awesome specs buy something else like a a Benchmark perhaps.

 

[Verdinut]

It's a multi-channel amp (8 channels) with several applications and seems to have plenty of power with that in mind. It isn't spec'd for the home audio consumer who worries about specs more than necessary, but it will work just fine for a variety of home audio applications just fine as long as the power meets your needs (and would exceed that of the OP in any case) and the fan noise and phoenix connectors are understood. Worrying about spec that is basically inaudible....meh. For the USD 295 I paid I don't consider it a poor purchase. YMMV If you want prettier/more awesome specs buy something else like a a Benchmark perhaps.

There are a lot of good performing power amps including the Monoliths, Outlook audiophile amps as well as the QSC RMX and DCA Series Pro amps which have excellent specs without having to go to an extreme like Benchmark or Accuphase and empty your wallet.. Those have published specs which I consider as conservative because their performance even exceeds them when they are tested.

 

[lovinthehd]

There are a lot of good performing power amps including the Monoliths, Outlook audiophile amps as well as the QSC RMX and DCA Series Pro amps which have excellent specs without having to go to an extreme like Benchmark or Accuphase. Those have published specs which I consider as conservative because their performance even exceeds them when they are tested and they don't empty your wallet.

You know I am in agreement with you Just seems silly to worry about specs as much as you are in this case. I don't think he's going to buy it now anyways. I'm fine with the Crown XLS myself and save the bucks.

 

[PENG]

As has been discussed (in PENG's thread about "does S&V test data affect your buying decisions" (I'm guessing title from memory) thread, IIRC) no one tests 5 channels into 4 ohms continuous power-full bandwidth!

S&V did it once, 7 channel into 4 ohms (that I could find), but not FBW, only at 20 Hz and 1 kHz, and 1% THD.
https://www.soundandvision.com/content/yamaha-rx-z9-av-receiver-measurements

That is the only one I could find from any where on www.

 

[PENG]

That's it_____Without more detailed specs! Peavey don't disclose the full specs. They only specify THD at 1 KHz on a 70 volt line. What is the THD from 20-20K at rated power at 4 and 8 ohms? What is the power bandwidth? What is the frequency response like at full power? Compare the specs of any QSC amp and you will be provided with detailed specs.

IMO, this amp has a very poor low current power supply as it's rated power output at 4 ohms is inferior to that for an 8 ohm load. It is indeed specifically designed for paging. I wouldn't recommend to anyone to acquire such product unless it's purpose is to use in venues for paging purposes. With the info at hand, this cannot be classified as a true hi-fi amplifier.

Let's ask @PENG what he thinks of that amp in a high-end home theater system.

Edit: Specifications:

• Model: CM 2208
• Output Power 4 Ohms: 150W x 8
• Output Power 8 Ohms: 220W x 8
• Output Power 70V: 20W x 8
• Frequency response (1W into 8 Ohms ): 1KHz, <0.02% THD+N, one channel driven, non-bridged operation - 5Hz to 20kHz, +/- 1dB
  THD+N: <0.02% at rated power (@ 70V, 1kHz)
  Damping factor: 200:1 into 8 Ohms
• Input CMRR: >60dB @ 1KHz
• Input sensitivity @ 70V: 0.775V for full rated output power (0.775V gain selected); .75V for full rated power (x40 gain selected)
• Input impedance: 20Kohms balanced, 10Kohms unbalanced
• Hum and noise: -97dB, A-weighted
• Crosstalk: < -60dB below max rated power (1KHz)
  Power supply: linear transformer
• Circuit breaker rating (120V/230V): 12A / 6A
• Current draw (120VAC),1/8 power, 70V: 4.0A
• Current draw (120VAC),1/3 power, 70V: 8.0A
• Current draw (120VAC),at idle: <2A
  Thermal emissions 1/3 power, 70V: 947 btu/hr

I prefer other mch amps and won't touch the CM2208 that seems to be designed for some specific applications, such as for high impedance loads.

 

[lovinthehd]

I prefer other mch amps and won't touch the CM2208 that seems to be designed for some specific applications, such as for high impedance loads.

Would you elaborate a bit? It indicates in the manual minimum 8 ohm impedance. This would be bad if using with speakers that have say 8 ohm impedance and swing higher at points? I hooked up to speakers that probably do that but didn't notice any anomalies. @ellisr63 used one in his multich system, and no longer does, due the fan noise (altho he said he might use it again in a house in Mexico he was setting up).

 

[-Jim-]

It’s 7.1.4 or 7.2.4 if you do two subs. Just letting you know the terminology.

Base channels. Number of subs. Ceiling height channels.

Good luck! Go for a 12 in ported sub

I prefer: Ear level channels. Number of subs. Ceiling height channels.

 

[snakeeyes]

I prefer: Ear level channels. Number of subs. Ceiling height channels.

Ya except the center usually isn’t at ear level unless you have a projector screen that allows sound through for a center at ear level, but I know what you mean. I’m looking forward to affordable 4K projectors some day soon. Hoping Seattle can get that NHL expansion team in the next couple years so I can justify something like that.

 

[PENG]

Would you elaborate a bit? It indicates in the manual minimum 8 ohm impedance. This would be bad if using with speakers that have say 8 ohm impedance and swing higher at points? I hooked up to speakers that probably do that but didn't notice any anomalies. @ellisr63 used one in his multich system, and no longer does, due the fan noise (altho he said he might use it again in a house in Mexico he was setting up).

Minimum is 4 ohms, but maximum may be 24 ohms, the minimum 8 ohms indicated in the manual is for the bridged mode.

That thing was designed for up to 70V (24 ohms)!! So relatively speaking, it is more of a high voltage amp, not a high current amp (I hated such term, but that's what audiophiles use..). As @Verdinut pointed out, it output less into 4 ohms than into 8 ohms. Even a little Denon AVR-X3400H could do a little better if you have 4 ohm speakers.

https://www.peaveycommercialaudio.com/wp-content/uploads/datasheet/CM 2208 Spec Sheet.pdf
https://peaveycommercialaudio.com/product/cm-2208/

 

[lovinthehd]

Minimum is 4 ohms, but maximum may be 24 ohms, the minimum 8 ohms indicated in the manual is for the bridged mode.

That thing was designed for up to 70V (24 ohms)!! So relatively speaking, it is more of a high voltage amp, not a high current amp (I hated such term, but that's what audiophiles use..). As @Verdinut pointed out, it output less into 4 ohms than into 8 ohms. Even a little Denon AVR-X3400H could do a little better if you have 4 ohm speakers.

https://www.peaveycommercialaudio.com/wp-content/uploads/datasheet/CM 2208 Spec Sheet.pdf
https://peaveycommercialaudio.com/product/cm-2208/

View attachment 25363

Actually up to 140V from what you posted....and show me that Denon where it can do that power level in 8ch at 4ohm please (like we mentioned in your other thread).

 

[PENG]

Actually up to 140V from what you posted....and show me that Denon where it can do that power level in 8ch at 4ohm please (like we mentioned in your other thread).

140 V would be for bridged mode only. I have never seen anything tested at 4 ohms for 8 channels. For 7 channels, there was one (the only one I have ever seen, by S&V), and I posted the link in post#113.