infinity rsb efficiency

[quadmatrix82]

hi fellow AK members, does anyone know what the db rating is on Infinity Rsb? Hope someone out there can help cheers!

 

[mhardy6647]

You've got this reference, yes?
http://www.infinity-classics.de/inf...e-series-1978-klein/index-Reference-klein.htm
25 watts recommmended min. amp power suggests to me, maybe high 80s? Note it's a 4-ohm nominal speaker system.

 

[Tedrick]

No efficiency specs on Infinity Classics or on Infinity's website. Being a sealed box design from Infinity's heyday, I'd have to guess 86-89 dB.

 

[highfigh]

86dB rings a bell but I doubt they put out more than 87dB @1W. They will get loud but the power needs to be very clean. Nice sounding speakers.

 

[mhardy6647]

86dB rings a bell but I doubt they put out more than 87dB @1W. They will get loud but the power needs to be very clean. Nice sounding speakers.

Just remember that 1W at 4 ohms is not 2.83 VAC, it's 1.415 VAC

 

[highfigh]

I don't remember them being a true 4 Ohm speaker but I do remember some amps having a hard time with them. OTOH, that was close to 30 years ago and we picked up Infinity at the tail end of the series that included the RSb and RSm.

OK, I found this link and it does show 4 Ohms:
http://www.vpi.us/standard.html

It also has the crossover diagram but nothing showing the sensitivity. Unfortunately, there was no "set in stone" 1W standard.

 

[quadmatrix82]

hi all, thanks for the replies, i was looking for a vintage pair of speakers that were at least 92 db and these came up via a contact of mine - i'll keep looking! Merry Christmas and best wishes for the festive season!