Can you get a Dual Mono sound by using two AVRs?

[rwnano]

Sansui AU-517 and AU-717 were one transformer per channel.

AU 717:


AU 517

 

[rwnano]

Yamaha PC-5002M power amplifier
https://www.hifiengine.com/manual_library/yamaha/pc5002m.shtml
500 watts per channel into 8Ω (stereo), 1500 watts into 8Ω (mono)

 

[rwnano]

correct that H/K uses an all channels driven test to rate their receivers, however, bench tests do provide some interesting data:

H/K AVR330
$799, rated power: 55 watts ACD (seven channels), 65 watts two channels driven.
https://support.harmankardon.com/on...t/dw911f9d11/pdfs/AVR 330,CP 30^HK^om^^^^.pdf
Bench test: one channel: 95 watts, five channels: 66 watts.
(and it went into protection mode when being tested for 4 ohms )

Denon AVR-2307CI
$800, rated power: 100 watts two channels driven (out of seven).
Bench test: one channel: 140 watts, five channels: 86 watts.
(no trouble driving 4 ohms)

Onkyo TX-SR504
$300, rated power: 75 watts two channels driven (out of seven).
Bench test: five channels: 72 watts.
(and can drive 4 ohms)

 

[IndianEars]

Lovely Close Up Pics, rwnano.

THANKS

 

[rwnano]

Lovely Close Up Pics, rwnano.

THANKS

Welcome sir. Understanding the dual transformer design philosophy now

 

[rwnano]

Two transformers in the classic Harman Kardon 930 Twin Power!

 

[rwnano]

 

[rwnano]

 

[rwnano]

 

[rwnano]

Harman Kardon 730 & 430 have two transformers each - Twin Powered. Nice design element! FYI !

 

[General_sound]

Many integrated amplifiers have two transformers. Denon PMA-1500,1510, 1520, 1600NE, PMA 2500, 3000NE , 110 and some other amps from Denon have twin transformers, EI core type. However , as known to me , the implementation is different: in the sense that these are connected in parallel providing voltage to 2 large capacitors ( However I would like this fact to be checked by some Forum Member, as I could be wrong).

 

[hifimaddy]

AU 517

View attachment 89307

The first thing my eyes went to were the Elna caps. Most of the AVRs or amplifiers prefer Panasonic caps these days, and this Sansui used Elna, which is very understandable. These beauties sounded and stayed strong for many years, and they will go beyond, and the newer ones don't even come close. Thanks for the close-up image, which reminds me of some of my previous gear.