Adding an additional speaker to Nait Naim 5si speaker output

[Laz]

I have Wharfdale Denton’s 85 (4 ohms) connected to my Nait 5si. Sounds pretty good with most music. Ive attached an old BOSE acoustimass series 3 bass module (4 ohms no high-level input options) to the same speaker output used by the Dentons, The sound benefits from a little but noticeable richness in bass. Is this a safe connection to the Nait 5si if the speaker ohms are the same?

[robert_h]

You should connect your sub to the terminals on the speakers themselves, not the amp.

REL Subwoofer Naim NAIT 5

You shouldn’t connect directly to the back of the NAIT 5. It will need to be connected from the connectors on the speakers.

[Richard.Dane]

This doesn’t sound like a good idea to me, but I guess if you like it then who am I to say otherwise. AFAIK if the two 4 ohm units are connected in series then the amp sees 8 ohms, which is fine, but make sure both channels are seeing this.

[Laz]

Thanks for the advice – its appreciated. I had success connecting a REL T5 subwoofer using a high-level connection, but Ive lost that speaker to the family rooms TV. The old bose subwoofer – without high-level option – seemed promising as it did add some bass value to the music , and the amp didnt seem to complain, but still, I dont want to risk damaging the amp, so I will abandon this approach.