KEF B300 Replacement

[argonrepublic]

Hi.
I'm looking to replace my KEF B300 Woofers ( Kef 105.2 Bass unit )
I have become accustomed to and have really enjoyed these but the one was a rescue and the enclosure. Is very rough what would be an ideal drive unit and enclosure to be an improvement while retaining some of ithe 105.2 Character?
thanks

 

[bjorno]

Hi argonrepublic,

Any Quality Driver will do: Look for similar fs,Vas and Qts but larger xmax.

b🙂

 

[PB2]

budget?

Worth a try, add 1 ohm 50W in series to raise Qts:
Dayton Audio DS315-8 12" Designer Series Woofer Speaker

 

[bjorno]

Hi,

Not budget but probably increasing the overall Performance:

Sugg: Replacing KefB300B with aespeakers_IB12

aespeakers_IB12AU-8(Re=5.5 Ohm)

In a 70 liter Sealed Box(= Volume of Kef 105.2):

Qtc= 6% less than for Kef 300B_SP1071(Re=6.9 Ohm)
but will return a -0.3 dB less SPL(JND)

f-3dB is about 3.3 Hz lower

xmax is 3 Times xmax Kef 300B_SP1071

Lower Kef 105.2 HPF Le by 25%(25.5) and increase the Parallel C by 25%(25.5) too based by the Re Ratio= 6.9/5.5 = 1.2545

b🙂

 

[bjorno]

😱 My bad:

'Lower Kef 105.2 HPF' Le by 25%(25.5) and increase the Parallel C by 25%(25.5) too based by the Re Ratio= 6.9/5.5 = 1.2545

should be 'Lower Kef 105.2 LPF...'

b🙂

 

[Fenalaar]

The Peerless SLS315 is a sugested replacement for the B300, according to this page: HiFi Collector: KEF 105.2 - Bass Unit (woofer) Replacement - The Full Story

Peerless by Tymphany 830669 12" Paper Cone SLS Subwoofer

Johan-Kr