Всем огромное спасибо за ответы. Огромное спасибо. Может кому будет интересно - я ночью проснулся от посетившей мысли. А что мне не написать письмо в техподдержку самих производителей? И написал. В TEAC и в MJ. MJ ответил моментально. Словно они ждали как раз меня)))) Письмо подробное и многое я понял. Правда некоторые детали их жизни плавающей земли понял не до конца. Выношу ответ на рассмотрения общественности...


Thank you for your email.

Unfortunately you have purchased the type of amplifier that uses a floating earth rail for the outputs. It is not a problem provided there is a dedicated “subwoofer PreOut” to connect with your reference 100Mk2.

The reason that this is a problem is that the input circuits of most preamplifier circuits reference their voltages to ground which is also common with the audio zero volt rail in a design of Audiophile equipment. MJ Acoustics is the same in this regard. The problem arises when you wish to use the High Level input to the subwoofer which is not a pre amplifier level signal. The speaker outputs on your amplifier are from a Digital Class D design ( see extract from the TEAC website specifications. below
ETEC Class-D Power Amplifier with Maximum Available Output of 120 W + 120 W (4Ω)

(добавлю от себя - ETEC стоит как раз внутри моего усилителя TEAC - усилитель Японский, а усилительные блоки Норвежские)

This means that you can only use the High Level input on your subwoofer if you have an interface in the line between the subwoofer and the speaker terminals of your TEAC amplifier.

There is an interface we have designed for such scenarios and we would be more than happy to provide this to you if you require it.

The cost is £199.00 Inc. vat and shipping to UK & Europe mainland addresses.

If this is of interest to you then please let us know and we can arrange for this items to be invoiced and shipped following receipt of payment.

Regards

MJA Tech