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A&R CAMBRIDGE A60 + AR 92


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#1 dynaco_dan

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Posted 08 November 2005 - 11:40 PM

>Hi Vern, thanks 4 your reply.
>Reading the manual it says:
>
>Both channels into 8ohm; >35w @0.2% THD 20Hz - 20kHz
>1kHz output @ 0.2% THD into 8ohm is typically 40 watts (both
>channels driven)
>
> 47 watts (one channel driven)
>IHF burst power into 8ohm typically 55W (4ohm typically 90W)
>1kHz THD < 0.08% @ any level upto 35W/8ohm, typically < 0.05%
>@ 35W
>
>Well, I hope that makes sense to you! And is gonna help
>mesolve my dilemma.
>
>Once again, thanks. Andi

Hi Andi;

My best guess would be that you have @ 4 ohms, maybe 35 - 40 watts RMS per channel 20 - 20,000 Hz.

IHF, burst, peak, typically and other terms have not much true meaning to us, but even if we assume 25 watts RMS per channel 20 - 20,000 Hz.

Ideally if the amps power output goes up with a greater impedance load then you do have a slightly better situation.

This would quite probably be a very minimum power output amplifier for your 4 ohm speaker.

Assume for a minute that you like background music only, and have the amps volume control, at say 9:00 o'clock position, and you are quite happy with this.

Then I would not worry any more about this issue.

If you like to play at 2:00 o'clock or greater, then you do not sufficient power reserve and can most certainly burn out your speakers relatively easy.

If you usually have the volume at 12:00 o'clock position with heavy rock ditto.

After all this, Andi, if you were to go and buy a bigger amp, consider perhaps 100 - 200 watts RMS per channel @ 4 ohms from 20 - 20,000 HZ and even more output with an increasing load impedance.

Generally speaking, a 4 ohm speaker is rated 4 ohms only @ 1,000 Hz.

From 20 Hz which may have a 35 ohms impedance to 20,000 Hz where there may be a 6 ohms impedance, there is a fluctuation from the 4 ohms rating, above and sometimes below.

The 35 ohm load at 20 Hz is hypothetical, because if the woofer has that capability, and there is music and the amp has the output then you will have clean bass if your amp has sufficient power to drive the woofer.

If your amp was to put out 3 watts RMS @ 16 ohms and even less @ 32 ohms you cannot have it very loud without some distortion.

Please wait for other members to offer their best advice, Andi.

Or if you have more in depth questions.
VERN

dynaco_dan2@yahoo.ca

#2 Guest_andimania_*

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Posted 08 November 2005 - 04:37 PM

Hi Vern, thanks 4 your reply.
Reading the manual it says:

Both channels into 8ohm; >35w @0.2% THD 20Hz - 20kHz
1kHz output @ 0.2% THD into 8ohm is typically 40 watts (both channels driven)
47 watts (one channel driven)
IHF burst power into 8ohm typically 55W (4ohm typically 90W)
1kHz THD < 0.08% @ any level upto 35W/8ohm, typically < 0.05% @ 35W

Well, I hope that makes sense to you! And is gonna help mesolve my dilemma.

Once again, thanks. Andi

#3 dynaco_dan

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Posted 08 November 2005 - 04:14 PM

>Hey all! This is my first post here. I'm so pleased at
>finding somewhere to talk turkey about my problemette!
>A contact at ARCAM has told me that I CANNOT use my newly
>aquired A60 with my (under restoration) AR92's. Is he talking
>out of his hat?
>Or am I gonna have to part with them?
>He said that because the AR92's are 4 ohm, this would 'cook'
>the amp.
>Help!!!
>Regards all, Andi

Hi Andi;

Welcome.

How many watts RMS does the A60 have @ 4 ohms 20 - 20,000 hz, likewise @ 8 and 16 ohms as well.
VERN

dynaco_dan2@yahoo.ca

#4 Guest_andimania_*

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Posted 08 November 2005 - 02:26 PM

Hey all! This is my first post here. I'm so pleased at finding somewhere to talk turkey about my problemette!
A contact at ARCAM has told me that I CANNOT use my newly aquired A60 with my (under restoration) AR92's. Is he talking out of his hat?
Or am I gonna have to part with them?
He said that because the AR92's are 4 ohm, this would 'cook' the amp.
Help!!!
Regards all, Andi




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